Commit | Line | Data |
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414c70cb LG |
1 | /* |
2 | * core.c -- Voltage/Current Regulator framework. | |
3 | * | |
4 | * Copyright 2007, 2008 Wolfson Microelectronics PLC. | |
a5766f11 | 5 | * Copyright 2008 SlimLogic Ltd. |
414c70cb | 6 | * |
a5766f11 | 7 | * Author: Liam Girdwood <lrg@slimlogic.co.uk> |
414c70cb LG |
8 | * |
9 | * This program is free software; you can redistribute it and/or modify it | |
10 | * under the terms of the GNU General Public License as published by the | |
11 | * Free Software Foundation; either version 2 of the License, or (at your | |
12 | * option) any later version. | |
13 | * | |
14 | */ | |
15 | ||
16 | #include <linux/kernel.h> | |
17 | #include <linux/init.h> | |
1130e5b3 | 18 | #include <linux/debugfs.h> |
414c70cb | 19 | #include <linux/device.h> |
5a0e3ad6 | 20 | #include <linux/slab.h> |
f21e0e81 | 21 | #include <linux/async.h> |
414c70cb LG |
22 | #include <linux/err.h> |
23 | #include <linux/mutex.h> | |
24 | #include <linux/suspend.h> | |
31aae2be | 25 | #include <linux/delay.h> |
65f73508 | 26 | #include <linux/gpio.h> |
69511a45 | 27 | #include <linux/of.h> |
65b19ce6 | 28 | #include <linux/regmap.h> |
69511a45 | 29 | #include <linux/regulator/of_regulator.h> |
414c70cb LG |
30 | #include <linux/regulator/consumer.h> |
31 | #include <linux/regulator/driver.h> | |
32 | #include <linux/regulator/machine.h> | |
65602c32 | 33 | #include <linux/module.h> |
414c70cb | 34 | |
02fa3ec0 MB |
35 | #define CREATE_TRACE_POINTS |
36 | #include <trace/events/regulator.h> | |
37 | ||
34abbd68 MB |
38 | #include "dummy.h" |
39 | ||
7d51a0db MB |
40 | #define rdev_crit(rdev, fmt, ...) \ |
41 | pr_crit("%s: " fmt, rdev_get_name(rdev), ##__VA_ARGS__) | |
5da84fd9 JP |
42 | #define rdev_err(rdev, fmt, ...) \ |
43 | pr_err("%s: " fmt, rdev_get_name(rdev), ##__VA_ARGS__) | |
44 | #define rdev_warn(rdev, fmt, ...) \ | |
45 | pr_warn("%s: " fmt, rdev_get_name(rdev), ##__VA_ARGS__) | |
46 | #define rdev_info(rdev, fmt, ...) \ | |
47 | pr_info("%s: " fmt, rdev_get_name(rdev), ##__VA_ARGS__) | |
48 | #define rdev_dbg(rdev, fmt, ...) \ | |
49 | pr_debug("%s: " fmt, rdev_get_name(rdev), ##__VA_ARGS__) | |
50 | ||
414c70cb LG |
51 | static DEFINE_MUTEX(regulator_list_mutex); |
52 | static LIST_HEAD(regulator_list); | |
53 | static LIST_HEAD(regulator_map_list); | |
21cf891a | 54 | static bool has_full_constraints; |
688fe99a | 55 | static bool board_wants_dummy_regulator; |
414c70cb | 56 | |
1130e5b3 | 57 | static struct dentry *debugfs_root; |
1130e5b3 | 58 | |
8dc5390d | 59 | /* |
414c70cb LG |
60 | * struct regulator_map |
61 | * | |
62 | * Used to provide symbolic supply names to devices. | |
63 | */ | |
64 | struct regulator_map { | |
65 | struct list_head list; | |
40f9244f | 66 | const char *dev_name; /* The dev_name() for the consumer */ |
414c70cb | 67 | const char *supply; |
a5766f11 | 68 | struct regulator_dev *regulator; |
414c70cb LG |
69 | }; |
70 | ||
414c70cb LG |
71 | /* |
72 | * struct regulator | |
73 | * | |
74 | * One for each consumer device. | |
75 | */ | |
76 | struct regulator { | |
77 | struct device *dev; | |
78 | struct list_head list; | |
6492bc1b | 79 | unsigned int always_on:1; |
414c70cb LG |
80 | int uA_load; |
81 | int min_uV; | |
82 | int max_uV; | |
414c70cb LG |
83 | char *supply_name; |
84 | struct device_attribute dev_attr; | |
85 | struct regulator_dev *rdev; | |
5de70519 | 86 | struct dentry *debugfs; |
414c70cb LG |
87 | }; |
88 | ||
89 | static int _regulator_is_enabled(struct regulator_dev *rdev); | |
3801b86a | 90 | static int _regulator_disable(struct regulator_dev *rdev); |
414c70cb LG |
91 | static int _regulator_get_voltage(struct regulator_dev *rdev); |
92 | static int _regulator_get_current_limit(struct regulator_dev *rdev); | |
93 | static unsigned int _regulator_get_mode(struct regulator_dev *rdev); | |
94 | static void _notifier_call_chain(struct regulator_dev *rdev, | |
95 | unsigned long event, void *data); | |
75790251 MB |
96 | static int _regulator_do_set_voltage(struct regulator_dev *rdev, |
97 | int min_uV, int max_uV); | |
3801b86a MB |
98 | static struct regulator *create_regulator(struct regulator_dev *rdev, |
99 | struct device *dev, | |
100 | const char *supply_name); | |
414c70cb | 101 | |
1083c393 MB |
102 | static const char *rdev_get_name(struct regulator_dev *rdev) |
103 | { | |
104 | if (rdev->constraints && rdev->constraints->name) | |
105 | return rdev->constraints->name; | |
106 | else if (rdev->desc->name) | |
107 | return rdev->desc->name; | |
108 | else | |
109 | return ""; | |
110 | } | |
111 | ||
69511a45 RN |
112 | /** |
113 | * of_get_regulator - get a regulator device node based on supply name | |
114 | * @dev: Device pointer for the consumer (of regulator) device | |
115 | * @supply: regulator supply name | |
116 | * | |
117 | * Extract the regulator device node corresponding to the supply name. | |
118 | * retruns the device node corresponding to the regulator if found, else | |
119 | * returns NULL. | |
120 | */ | |
121 | static struct device_node *of_get_regulator(struct device *dev, const char *supply) | |
122 | { | |
123 | struct device_node *regnode = NULL; | |
124 | char prop_name[32]; /* 32 is max size of property name */ | |
125 | ||
126 | dev_dbg(dev, "Looking up %s-supply from device tree\n", supply); | |
127 | ||
128 | snprintf(prop_name, 32, "%s-supply", supply); | |
129 | regnode = of_parse_phandle(dev->of_node, prop_name, 0); | |
130 | ||
131 | if (!regnode) { | |
16fbcc3b | 132 | dev_dbg(dev, "Looking up %s property in node %s failed", |
69511a45 RN |
133 | prop_name, dev->of_node->full_name); |
134 | return NULL; | |
135 | } | |
136 | return regnode; | |
137 | } | |
138 | ||
6492bc1b MB |
139 | static int _regulator_can_change_status(struct regulator_dev *rdev) |
140 | { | |
141 | if (!rdev->constraints) | |
142 | return 0; | |
143 | ||
144 | if (rdev->constraints->valid_ops_mask & REGULATOR_CHANGE_STATUS) | |
145 | return 1; | |
146 | else | |
147 | return 0; | |
148 | } | |
149 | ||
414c70cb LG |
150 | /* Platform voltage constraint check */ |
151 | static int regulator_check_voltage(struct regulator_dev *rdev, | |
152 | int *min_uV, int *max_uV) | |
153 | { | |
154 | BUG_ON(*min_uV > *max_uV); | |
155 | ||
156 | if (!rdev->constraints) { | |
5da84fd9 | 157 | rdev_err(rdev, "no constraints\n"); |
414c70cb LG |
158 | return -ENODEV; |
159 | } | |
160 | if (!(rdev->constraints->valid_ops_mask & REGULATOR_CHANGE_VOLTAGE)) { | |
5da84fd9 | 161 | rdev_err(rdev, "operation not allowed\n"); |
414c70cb LG |
162 | return -EPERM; |
163 | } | |
164 | ||
165 | if (*max_uV > rdev->constraints->max_uV) | |
166 | *max_uV = rdev->constraints->max_uV; | |
167 | if (*min_uV < rdev->constraints->min_uV) | |
168 | *min_uV = rdev->constraints->min_uV; | |
169 | ||
89f425ed MB |
170 | if (*min_uV > *max_uV) { |
171 | rdev_err(rdev, "unsupportable voltage range: %d-%duV\n", | |
54abd335 | 172 | *min_uV, *max_uV); |
414c70cb | 173 | return -EINVAL; |
89f425ed | 174 | } |
414c70cb LG |
175 | |
176 | return 0; | |
177 | } | |
178 | ||
05fda3b1 TP |
179 | /* Make sure we select a voltage that suits the needs of all |
180 | * regulator consumers | |
181 | */ | |
182 | static int regulator_check_consumers(struct regulator_dev *rdev, | |
183 | int *min_uV, int *max_uV) | |
184 | { | |
185 | struct regulator *regulator; | |
186 | ||
187 | list_for_each_entry(regulator, &rdev->consumer_list, list) { | |
4aa922c0 MB |
188 | /* |
189 | * Assume consumers that didn't say anything are OK | |
190 | * with anything in the constraint range. | |
191 | */ | |
192 | if (!regulator->min_uV && !regulator->max_uV) | |
193 | continue; | |
194 | ||
05fda3b1 TP |
195 | if (*max_uV > regulator->max_uV) |
196 | *max_uV = regulator->max_uV; | |
197 | if (*min_uV < regulator->min_uV) | |
198 | *min_uV = regulator->min_uV; | |
199 | } | |
200 | ||
201 | if (*min_uV > *max_uV) | |
202 | return -EINVAL; | |
203 | ||
204 | return 0; | |
205 | } | |
206 | ||
414c70cb LG |
207 | /* current constraint check */ |
208 | static int regulator_check_current_limit(struct regulator_dev *rdev, | |
209 | int *min_uA, int *max_uA) | |
210 | { | |
211 | BUG_ON(*min_uA > *max_uA); | |
212 | ||
213 | if (!rdev->constraints) { | |
5da84fd9 | 214 | rdev_err(rdev, "no constraints\n"); |
414c70cb LG |
215 | return -ENODEV; |
216 | } | |
217 | if (!(rdev->constraints->valid_ops_mask & REGULATOR_CHANGE_CURRENT)) { | |
5da84fd9 | 218 | rdev_err(rdev, "operation not allowed\n"); |
414c70cb LG |
219 | return -EPERM; |
220 | } | |
221 | ||
222 | if (*max_uA > rdev->constraints->max_uA) | |
223 | *max_uA = rdev->constraints->max_uA; | |
224 | if (*min_uA < rdev->constraints->min_uA) | |
225 | *min_uA = rdev->constraints->min_uA; | |
226 | ||
89f425ed MB |
227 | if (*min_uA > *max_uA) { |
228 | rdev_err(rdev, "unsupportable current range: %d-%duA\n", | |
54abd335 | 229 | *min_uA, *max_uA); |
414c70cb | 230 | return -EINVAL; |
89f425ed | 231 | } |
414c70cb LG |
232 | |
233 | return 0; | |
234 | } | |
235 | ||
236 | /* operating mode constraint check */ | |
2c608234 | 237 | static int regulator_mode_constrain(struct regulator_dev *rdev, int *mode) |
414c70cb | 238 | { |
2c608234 | 239 | switch (*mode) { |
e573520b DB |
240 | case REGULATOR_MODE_FAST: |
241 | case REGULATOR_MODE_NORMAL: | |
242 | case REGULATOR_MODE_IDLE: | |
243 | case REGULATOR_MODE_STANDBY: | |
244 | break; | |
245 | default: | |
89f425ed | 246 | rdev_err(rdev, "invalid mode %x specified\n", *mode); |
e573520b DB |
247 | return -EINVAL; |
248 | } | |
249 | ||
414c70cb | 250 | if (!rdev->constraints) { |
5da84fd9 | 251 | rdev_err(rdev, "no constraints\n"); |
414c70cb LG |
252 | return -ENODEV; |
253 | } | |
254 | if (!(rdev->constraints->valid_ops_mask & REGULATOR_CHANGE_MODE)) { | |
5da84fd9 | 255 | rdev_err(rdev, "operation not allowed\n"); |
414c70cb LG |
256 | return -EPERM; |
257 | } | |
2c608234 MB |
258 | |
259 | /* The modes are bitmasks, the most power hungry modes having | |
260 | * the lowest values. If the requested mode isn't supported | |
261 | * try higher modes. */ | |
262 | while (*mode) { | |
263 | if (rdev->constraints->valid_modes_mask & *mode) | |
264 | return 0; | |
265 | *mode /= 2; | |
414c70cb | 266 | } |
2c608234 MB |
267 | |
268 | return -EINVAL; | |
414c70cb LG |
269 | } |
270 | ||
271 | /* dynamic regulator mode switching constraint check */ | |
272 | static int regulator_check_drms(struct regulator_dev *rdev) | |
273 | { | |
274 | if (!rdev->constraints) { | |
5da84fd9 | 275 | rdev_err(rdev, "no constraints\n"); |
414c70cb LG |
276 | return -ENODEV; |
277 | } | |
278 | if (!(rdev->constraints->valid_ops_mask & REGULATOR_CHANGE_DRMS)) { | |
5da84fd9 | 279 | rdev_err(rdev, "operation not allowed\n"); |
414c70cb LG |
280 | return -EPERM; |
281 | } | |
282 | return 0; | |
283 | } | |
284 | ||
414c70cb LG |
285 | static ssize_t regulator_uV_show(struct device *dev, |
286 | struct device_attribute *attr, char *buf) | |
287 | { | |
a5766f11 | 288 | struct regulator_dev *rdev = dev_get_drvdata(dev); |
414c70cb LG |
289 | ssize_t ret; |
290 | ||
291 | mutex_lock(&rdev->mutex); | |
292 | ret = sprintf(buf, "%d\n", _regulator_get_voltage(rdev)); | |
293 | mutex_unlock(&rdev->mutex); | |
294 | ||
295 | return ret; | |
296 | } | |
7ad68e2f | 297 | static DEVICE_ATTR(microvolts, 0444, regulator_uV_show, NULL); |
414c70cb LG |
298 | |
299 | static ssize_t regulator_uA_show(struct device *dev, | |
300 | struct device_attribute *attr, char *buf) | |
301 | { | |
a5766f11 | 302 | struct regulator_dev *rdev = dev_get_drvdata(dev); |
414c70cb LG |
303 | |
304 | return sprintf(buf, "%d\n", _regulator_get_current_limit(rdev)); | |
305 | } | |
7ad68e2f | 306 | static DEVICE_ATTR(microamps, 0444, regulator_uA_show, NULL); |
414c70cb | 307 | |
bc558a60 MB |
308 | static ssize_t regulator_name_show(struct device *dev, |
309 | struct device_attribute *attr, char *buf) | |
310 | { | |
311 | struct regulator_dev *rdev = dev_get_drvdata(dev); | |
bc558a60 | 312 | |
1083c393 | 313 | return sprintf(buf, "%s\n", rdev_get_name(rdev)); |
bc558a60 MB |
314 | } |
315 | ||
4fca9545 | 316 | static ssize_t regulator_print_opmode(char *buf, int mode) |
414c70cb | 317 | { |
414c70cb LG |
318 | switch (mode) { |
319 | case REGULATOR_MODE_FAST: | |
320 | return sprintf(buf, "fast\n"); | |
321 | case REGULATOR_MODE_NORMAL: | |
322 | return sprintf(buf, "normal\n"); | |
323 | case REGULATOR_MODE_IDLE: | |
324 | return sprintf(buf, "idle\n"); | |
325 | case REGULATOR_MODE_STANDBY: | |
326 | return sprintf(buf, "standby\n"); | |
327 | } | |
328 | return sprintf(buf, "unknown\n"); | |
329 | } | |
330 | ||
4fca9545 DB |
331 | static ssize_t regulator_opmode_show(struct device *dev, |
332 | struct device_attribute *attr, char *buf) | |
414c70cb | 333 | { |
a5766f11 | 334 | struct regulator_dev *rdev = dev_get_drvdata(dev); |
414c70cb | 335 | |
4fca9545 DB |
336 | return regulator_print_opmode(buf, _regulator_get_mode(rdev)); |
337 | } | |
7ad68e2f | 338 | static DEVICE_ATTR(opmode, 0444, regulator_opmode_show, NULL); |
4fca9545 DB |
339 | |
340 | static ssize_t regulator_print_state(char *buf, int state) | |
341 | { | |
414c70cb LG |
342 | if (state > 0) |
343 | return sprintf(buf, "enabled\n"); | |
344 | else if (state == 0) | |
345 | return sprintf(buf, "disabled\n"); | |
346 | else | |
347 | return sprintf(buf, "unknown\n"); | |
348 | } | |
349 | ||
4fca9545 DB |
350 | static ssize_t regulator_state_show(struct device *dev, |
351 | struct device_attribute *attr, char *buf) | |
352 | { | |
353 | struct regulator_dev *rdev = dev_get_drvdata(dev); | |
9332546f MB |
354 | ssize_t ret; |
355 | ||
356 | mutex_lock(&rdev->mutex); | |
357 | ret = regulator_print_state(buf, _regulator_is_enabled(rdev)); | |
358 | mutex_unlock(&rdev->mutex); | |
4fca9545 | 359 | |
9332546f | 360 | return ret; |
4fca9545 | 361 | } |
7ad68e2f | 362 | static DEVICE_ATTR(state, 0444, regulator_state_show, NULL); |
4fca9545 | 363 | |
853116a1 DB |
364 | static ssize_t regulator_status_show(struct device *dev, |
365 | struct device_attribute *attr, char *buf) | |
366 | { | |
367 | struct regulator_dev *rdev = dev_get_drvdata(dev); | |
368 | int status; | |
369 | char *label; | |
370 | ||
371 | status = rdev->desc->ops->get_status(rdev); | |
372 | if (status < 0) | |
373 | return status; | |
374 | ||
375 | switch (status) { | |
376 | case REGULATOR_STATUS_OFF: | |
377 | label = "off"; | |
378 | break; | |
379 | case REGULATOR_STATUS_ON: | |
380 | label = "on"; | |
381 | break; | |
382 | case REGULATOR_STATUS_ERROR: | |
383 | label = "error"; | |
384 | break; | |
385 | case REGULATOR_STATUS_FAST: | |
386 | label = "fast"; | |
387 | break; | |
388 | case REGULATOR_STATUS_NORMAL: | |
389 | label = "normal"; | |
390 | break; | |
391 | case REGULATOR_STATUS_IDLE: | |
392 | label = "idle"; | |
393 | break; | |
394 | case REGULATOR_STATUS_STANDBY: | |
395 | label = "standby"; | |
396 | break; | |
1beaf762 KG |
397 | case REGULATOR_STATUS_UNDEFINED: |
398 | label = "undefined"; | |
399 | break; | |
853116a1 DB |
400 | default: |
401 | return -ERANGE; | |
402 | } | |
403 | ||
404 | return sprintf(buf, "%s\n", label); | |
405 | } | |
406 | static DEVICE_ATTR(status, 0444, regulator_status_show, NULL); | |
407 | ||
414c70cb LG |
408 | static ssize_t regulator_min_uA_show(struct device *dev, |
409 | struct device_attribute *attr, char *buf) | |
410 | { | |
a5766f11 | 411 | struct regulator_dev *rdev = dev_get_drvdata(dev); |
414c70cb LG |
412 | |
413 | if (!rdev->constraints) | |
414 | return sprintf(buf, "constraint not defined\n"); | |
415 | ||
416 | return sprintf(buf, "%d\n", rdev->constraints->min_uA); | |
417 | } | |
7ad68e2f | 418 | static DEVICE_ATTR(min_microamps, 0444, regulator_min_uA_show, NULL); |
414c70cb LG |
419 | |
420 | static ssize_t regulator_max_uA_show(struct device *dev, | |
421 | struct device_attribute *attr, char *buf) | |
422 | { | |
a5766f11 | 423 | struct regulator_dev *rdev = dev_get_drvdata(dev); |
414c70cb LG |
424 | |
425 | if (!rdev->constraints) | |
426 | return sprintf(buf, "constraint not defined\n"); | |
427 | ||
428 | return sprintf(buf, "%d\n", rdev->constraints->max_uA); | |
429 | } | |
7ad68e2f | 430 | static DEVICE_ATTR(max_microamps, 0444, regulator_max_uA_show, NULL); |
414c70cb LG |
431 | |
432 | static ssize_t regulator_min_uV_show(struct device *dev, | |
433 | struct device_attribute *attr, char *buf) | |
434 | { | |
a5766f11 | 435 | struct regulator_dev *rdev = dev_get_drvdata(dev); |
414c70cb LG |
436 | |
437 | if (!rdev->constraints) | |
438 | return sprintf(buf, "constraint not defined\n"); | |
439 | ||
440 | return sprintf(buf, "%d\n", rdev->constraints->min_uV); | |
441 | } | |
7ad68e2f | 442 | static DEVICE_ATTR(min_microvolts, 0444, regulator_min_uV_show, NULL); |
414c70cb LG |
443 | |
444 | static ssize_t regulator_max_uV_show(struct device *dev, | |
445 | struct device_attribute *attr, char *buf) | |
446 | { | |
a5766f11 | 447 | struct regulator_dev *rdev = dev_get_drvdata(dev); |
414c70cb LG |
448 | |
449 | if (!rdev->constraints) | |
450 | return sprintf(buf, "constraint not defined\n"); | |
451 | ||
452 | return sprintf(buf, "%d\n", rdev->constraints->max_uV); | |
453 | } | |
7ad68e2f | 454 | static DEVICE_ATTR(max_microvolts, 0444, regulator_max_uV_show, NULL); |
414c70cb LG |
455 | |
456 | static ssize_t regulator_total_uA_show(struct device *dev, | |
457 | struct device_attribute *attr, char *buf) | |
458 | { | |
a5766f11 | 459 | struct regulator_dev *rdev = dev_get_drvdata(dev); |
414c70cb LG |
460 | struct regulator *regulator; |
461 | int uA = 0; | |
462 | ||
463 | mutex_lock(&rdev->mutex); | |
464 | list_for_each_entry(regulator, &rdev->consumer_list, list) | |
fa2984d4 | 465 | uA += regulator->uA_load; |
414c70cb LG |
466 | mutex_unlock(&rdev->mutex); |
467 | return sprintf(buf, "%d\n", uA); | |
468 | } | |
7ad68e2f | 469 | static DEVICE_ATTR(requested_microamps, 0444, regulator_total_uA_show, NULL); |
414c70cb LG |
470 | |
471 | static ssize_t regulator_num_users_show(struct device *dev, | |
472 | struct device_attribute *attr, char *buf) | |
473 | { | |
a5766f11 | 474 | struct regulator_dev *rdev = dev_get_drvdata(dev); |
414c70cb LG |
475 | return sprintf(buf, "%d\n", rdev->use_count); |
476 | } | |
477 | ||
478 | static ssize_t regulator_type_show(struct device *dev, | |
479 | struct device_attribute *attr, char *buf) | |
480 | { | |
a5766f11 | 481 | struct regulator_dev *rdev = dev_get_drvdata(dev); |
414c70cb LG |
482 | |
483 | switch (rdev->desc->type) { | |
484 | case REGULATOR_VOLTAGE: | |
485 | return sprintf(buf, "voltage\n"); | |
486 | case REGULATOR_CURRENT: | |
487 | return sprintf(buf, "current\n"); | |
488 | } | |
489 | return sprintf(buf, "unknown\n"); | |
490 | } | |
491 | ||
492 | static ssize_t regulator_suspend_mem_uV_show(struct device *dev, | |
493 | struct device_attribute *attr, char *buf) | |
494 | { | |
a5766f11 | 495 | struct regulator_dev *rdev = dev_get_drvdata(dev); |
414c70cb | 496 | |
414c70cb LG |
497 | return sprintf(buf, "%d\n", rdev->constraints->state_mem.uV); |
498 | } | |
7ad68e2f DB |
499 | static DEVICE_ATTR(suspend_mem_microvolts, 0444, |
500 | regulator_suspend_mem_uV_show, NULL); | |
414c70cb LG |
501 | |
502 | static ssize_t regulator_suspend_disk_uV_show(struct device *dev, | |
503 | struct device_attribute *attr, char *buf) | |
504 | { | |
a5766f11 | 505 | struct regulator_dev *rdev = dev_get_drvdata(dev); |
414c70cb | 506 | |
414c70cb LG |
507 | return sprintf(buf, "%d\n", rdev->constraints->state_disk.uV); |
508 | } | |
7ad68e2f DB |
509 | static DEVICE_ATTR(suspend_disk_microvolts, 0444, |
510 | regulator_suspend_disk_uV_show, NULL); | |
414c70cb LG |
511 | |
512 | static ssize_t regulator_suspend_standby_uV_show(struct device *dev, | |
513 | struct device_attribute *attr, char *buf) | |
514 | { | |
a5766f11 | 515 | struct regulator_dev *rdev = dev_get_drvdata(dev); |
414c70cb | 516 | |
414c70cb LG |
517 | return sprintf(buf, "%d\n", rdev->constraints->state_standby.uV); |
518 | } | |
7ad68e2f DB |
519 | static DEVICE_ATTR(suspend_standby_microvolts, 0444, |
520 | regulator_suspend_standby_uV_show, NULL); | |
414c70cb | 521 | |
414c70cb LG |
522 | static ssize_t regulator_suspend_mem_mode_show(struct device *dev, |
523 | struct device_attribute *attr, char *buf) | |
524 | { | |
a5766f11 | 525 | struct regulator_dev *rdev = dev_get_drvdata(dev); |
414c70cb | 526 | |
4fca9545 DB |
527 | return regulator_print_opmode(buf, |
528 | rdev->constraints->state_mem.mode); | |
414c70cb | 529 | } |
7ad68e2f DB |
530 | static DEVICE_ATTR(suspend_mem_mode, 0444, |
531 | regulator_suspend_mem_mode_show, NULL); | |
414c70cb LG |
532 | |
533 | static ssize_t regulator_suspend_disk_mode_show(struct device *dev, | |
534 | struct device_attribute *attr, char *buf) | |
535 | { | |
a5766f11 | 536 | struct regulator_dev *rdev = dev_get_drvdata(dev); |
414c70cb | 537 | |
4fca9545 DB |
538 | return regulator_print_opmode(buf, |
539 | rdev->constraints->state_disk.mode); | |
414c70cb | 540 | } |
7ad68e2f DB |
541 | static DEVICE_ATTR(suspend_disk_mode, 0444, |
542 | regulator_suspend_disk_mode_show, NULL); | |
414c70cb LG |
543 | |
544 | static ssize_t regulator_suspend_standby_mode_show(struct device *dev, | |
545 | struct device_attribute *attr, char *buf) | |
546 | { | |
a5766f11 | 547 | struct regulator_dev *rdev = dev_get_drvdata(dev); |
414c70cb | 548 | |
4fca9545 DB |
549 | return regulator_print_opmode(buf, |
550 | rdev->constraints->state_standby.mode); | |
414c70cb | 551 | } |
7ad68e2f DB |
552 | static DEVICE_ATTR(suspend_standby_mode, 0444, |
553 | regulator_suspend_standby_mode_show, NULL); | |
414c70cb LG |
554 | |
555 | static ssize_t regulator_suspend_mem_state_show(struct device *dev, | |
556 | struct device_attribute *attr, char *buf) | |
557 | { | |
a5766f11 | 558 | struct regulator_dev *rdev = dev_get_drvdata(dev); |
414c70cb | 559 | |
4fca9545 DB |
560 | return regulator_print_state(buf, |
561 | rdev->constraints->state_mem.enabled); | |
414c70cb | 562 | } |
7ad68e2f DB |
563 | static DEVICE_ATTR(suspend_mem_state, 0444, |
564 | regulator_suspend_mem_state_show, NULL); | |
414c70cb LG |
565 | |
566 | static ssize_t regulator_suspend_disk_state_show(struct device *dev, | |
567 | struct device_attribute *attr, char *buf) | |
568 | { | |
a5766f11 | 569 | struct regulator_dev *rdev = dev_get_drvdata(dev); |
414c70cb | 570 | |
4fca9545 DB |
571 | return regulator_print_state(buf, |
572 | rdev->constraints->state_disk.enabled); | |
414c70cb | 573 | } |
7ad68e2f DB |
574 | static DEVICE_ATTR(suspend_disk_state, 0444, |
575 | regulator_suspend_disk_state_show, NULL); | |
414c70cb LG |
576 | |
577 | static ssize_t regulator_suspend_standby_state_show(struct device *dev, | |
578 | struct device_attribute *attr, char *buf) | |
579 | { | |
a5766f11 | 580 | struct regulator_dev *rdev = dev_get_drvdata(dev); |
414c70cb | 581 | |
4fca9545 DB |
582 | return regulator_print_state(buf, |
583 | rdev->constraints->state_standby.enabled); | |
414c70cb | 584 | } |
7ad68e2f DB |
585 | static DEVICE_ATTR(suspend_standby_state, 0444, |
586 | regulator_suspend_standby_state_show, NULL); | |
587 | ||
bc558a60 | 588 | |
7ad68e2f DB |
589 | /* |
590 | * These are the only attributes are present for all regulators. | |
591 | * Other attributes are a function of regulator functionality. | |
592 | */ | |
414c70cb | 593 | static struct device_attribute regulator_dev_attrs[] = { |
bc558a60 | 594 | __ATTR(name, 0444, regulator_name_show, NULL), |
414c70cb LG |
595 | __ATTR(num_users, 0444, regulator_num_users_show, NULL), |
596 | __ATTR(type, 0444, regulator_type_show, NULL), | |
414c70cb LG |
597 | __ATTR_NULL, |
598 | }; | |
599 | ||
600 | static void regulator_dev_release(struct device *dev) | |
601 | { | |
a5766f11 | 602 | struct regulator_dev *rdev = dev_get_drvdata(dev); |
414c70cb LG |
603 | kfree(rdev); |
604 | } | |
605 | ||
606 | static struct class regulator_class = { | |
607 | .name = "regulator", | |
608 | .dev_release = regulator_dev_release, | |
609 | .dev_attrs = regulator_dev_attrs, | |
610 | }; | |
611 | ||
612 | /* Calculate the new optimum regulator operating mode based on the new total | |
613 | * consumer load. All locks held by caller */ | |
614 | static void drms_uA_update(struct regulator_dev *rdev) | |
615 | { | |
616 | struct regulator *sibling; | |
617 | int current_uA = 0, output_uV, input_uV, err; | |
618 | unsigned int mode; | |
619 | ||
620 | err = regulator_check_drms(rdev); | |
621 | if (err < 0 || !rdev->desc->ops->get_optimum_mode || | |
476c2d83 MB |
622 | (!rdev->desc->ops->get_voltage && |
623 | !rdev->desc->ops->get_voltage_sel) || | |
624 | !rdev->desc->ops->set_mode) | |
036de8ef | 625 | return; |
414c70cb LG |
626 | |
627 | /* get output voltage */ | |
1bf5a1f8 | 628 | output_uV = _regulator_get_voltage(rdev); |
414c70cb LG |
629 | if (output_uV <= 0) |
630 | return; | |
631 | ||
632 | /* get input voltage */ | |
1bf5a1f8 MB |
633 | input_uV = 0; |
634 | if (rdev->supply) | |
3f24f5ad | 635 | input_uV = regulator_get_voltage(rdev->supply); |
1bf5a1f8 | 636 | if (input_uV <= 0) |
414c70cb LG |
637 | input_uV = rdev->constraints->input_uV; |
638 | if (input_uV <= 0) | |
639 | return; | |
640 | ||
641 | /* calc total requested load */ | |
642 | list_for_each_entry(sibling, &rdev->consumer_list, list) | |
fa2984d4 | 643 | current_uA += sibling->uA_load; |
414c70cb LG |
644 | |
645 | /* now get the optimum mode for our new total regulator load */ | |
646 | mode = rdev->desc->ops->get_optimum_mode(rdev, input_uV, | |
647 | output_uV, current_uA); | |
648 | ||
649 | /* check the new mode is allowed */ | |
2c608234 | 650 | err = regulator_mode_constrain(rdev, &mode); |
414c70cb LG |
651 | if (err == 0) |
652 | rdev->desc->ops->set_mode(rdev, mode); | |
653 | } | |
654 | ||
655 | static int suspend_set_state(struct regulator_dev *rdev, | |
656 | struct regulator_state *rstate) | |
657 | { | |
658 | int ret = 0; | |
638f85c5 MB |
659 | |
660 | /* If we have no suspend mode configration don't set anything; | |
8ac0e95d AL |
661 | * only warn if the driver implements set_suspend_voltage or |
662 | * set_suspend_mode callback. | |
638f85c5 MB |
663 | */ |
664 | if (!rstate->enabled && !rstate->disabled) { | |
8ac0e95d AL |
665 | if (rdev->desc->ops->set_suspend_voltage || |
666 | rdev->desc->ops->set_suspend_mode) | |
5da84fd9 | 667 | rdev_warn(rdev, "No configuration\n"); |
638f85c5 MB |
668 | return 0; |
669 | } | |
670 | ||
671 | if (rstate->enabled && rstate->disabled) { | |
5da84fd9 | 672 | rdev_err(rdev, "invalid configuration\n"); |
638f85c5 MB |
673 | return -EINVAL; |
674 | } | |
414c70cb | 675 | |
8ac0e95d | 676 | if (rstate->enabled && rdev->desc->ops->set_suspend_enable) |
414c70cb | 677 | ret = rdev->desc->ops->set_suspend_enable(rdev); |
8ac0e95d | 678 | else if (rstate->disabled && rdev->desc->ops->set_suspend_disable) |
414c70cb | 679 | ret = rdev->desc->ops->set_suspend_disable(rdev); |
8ac0e95d AL |
680 | else /* OK if set_suspend_enable or set_suspend_disable is NULL */ |
681 | ret = 0; | |
682 | ||
414c70cb | 683 | if (ret < 0) { |
5da84fd9 | 684 | rdev_err(rdev, "failed to enabled/disable\n"); |
414c70cb LG |
685 | return ret; |
686 | } | |
687 | ||
688 | if (rdev->desc->ops->set_suspend_voltage && rstate->uV > 0) { | |
689 | ret = rdev->desc->ops->set_suspend_voltage(rdev, rstate->uV); | |
690 | if (ret < 0) { | |
5da84fd9 | 691 | rdev_err(rdev, "failed to set voltage\n"); |
414c70cb LG |
692 | return ret; |
693 | } | |
694 | } | |
695 | ||
696 | if (rdev->desc->ops->set_suspend_mode && rstate->mode > 0) { | |
697 | ret = rdev->desc->ops->set_suspend_mode(rdev, rstate->mode); | |
698 | if (ret < 0) { | |
5da84fd9 | 699 | rdev_err(rdev, "failed to set mode\n"); |
414c70cb LG |
700 | return ret; |
701 | } | |
702 | } | |
703 | return ret; | |
704 | } | |
705 | ||
706 | /* locks held by caller */ | |
707 | static int suspend_prepare(struct regulator_dev *rdev, suspend_state_t state) | |
708 | { | |
709 | if (!rdev->constraints) | |
710 | return -EINVAL; | |
711 | ||
712 | switch (state) { | |
713 | case PM_SUSPEND_STANDBY: | |
714 | return suspend_set_state(rdev, | |
715 | &rdev->constraints->state_standby); | |
716 | case PM_SUSPEND_MEM: | |
717 | return suspend_set_state(rdev, | |
718 | &rdev->constraints->state_mem); | |
719 | case PM_SUSPEND_MAX: | |
720 | return suspend_set_state(rdev, | |
721 | &rdev->constraints->state_disk); | |
722 | default: | |
723 | return -EINVAL; | |
724 | } | |
725 | } | |
726 | ||
727 | static void print_constraints(struct regulator_dev *rdev) | |
728 | { | |
729 | struct regulation_constraints *constraints = rdev->constraints; | |
973e9a27 | 730 | char buf[80] = ""; |
8f031b48 MB |
731 | int count = 0; |
732 | int ret; | |
414c70cb | 733 | |
8f031b48 | 734 | if (constraints->min_uV && constraints->max_uV) { |
414c70cb | 735 | if (constraints->min_uV == constraints->max_uV) |
8f031b48 MB |
736 | count += sprintf(buf + count, "%d mV ", |
737 | constraints->min_uV / 1000); | |
414c70cb | 738 | else |
8f031b48 MB |
739 | count += sprintf(buf + count, "%d <--> %d mV ", |
740 | constraints->min_uV / 1000, | |
741 | constraints->max_uV / 1000); | |
742 | } | |
743 | ||
744 | if (!constraints->min_uV || | |
745 | constraints->min_uV != constraints->max_uV) { | |
746 | ret = _regulator_get_voltage(rdev); | |
747 | if (ret > 0) | |
748 | count += sprintf(buf + count, "at %d mV ", ret / 1000); | |
749 | } | |
750 | ||
bf5892a8 MB |
751 | if (constraints->uV_offset) |
752 | count += sprintf(buf, "%dmV offset ", | |
753 | constraints->uV_offset / 1000); | |
754 | ||
8f031b48 | 755 | if (constraints->min_uA && constraints->max_uA) { |
414c70cb | 756 | if (constraints->min_uA == constraints->max_uA) |
8f031b48 MB |
757 | count += sprintf(buf + count, "%d mA ", |
758 | constraints->min_uA / 1000); | |
414c70cb | 759 | else |
8f031b48 MB |
760 | count += sprintf(buf + count, "%d <--> %d mA ", |
761 | constraints->min_uA / 1000, | |
762 | constraints->max_uA / 1000); | |
763 | } | |
764 | ||
765 | if (!constraints->min_uA || | |
766 | constraints->min_uA != constraints->max_uA) { | |
767 | ret = _regulator_get_current_limit(rdev); | |
768 | if (ret > 0) | |
e4a6376b | 769 | count += sprintf(buf + count, "at %d mA ", ret / 1000); |
414c70cb | 770 | } |
8f031b48 | 771 | |
414c70cb LG |
772 | if (constraints->valid_modes_mask & REGULATOR_MODE_FAST) |
773 | count += sprintf(buf + count, "fast "); | |
774 | if (constraints->valid_modes_mask & REGULATOR_MODE_NORMAL) | |
775 | count += sprintf(buf + count, "normal "); | |
776 | if (constraints->valid_modes_mask & REGULATOR_MODE_IDLE) | |
777 | count += sprintf(buf + count, "idle "); | |
778 | if (constraints->valid_modes_mask & REGULATOR_MODE_STANDBY) | |
779 | count += sprintf(buf + count, "standby"); | |
780 | ||
13ce29f8 | 781 | rdev_info(rdev, "%s\n", buf); |
4a682922 MB |
782 | |
783 | if ((constraints->min_uV != constraints->max_uV) && | |
784 | !(constraints->valid_ops_mask & REGULATOR_CHANGE_VOLTAGE)) | |
785 | rdev_warn(rdev, | |
786 | "Voltage range but no REGULATOR_CHANGE_VOLTAGE\n"); | |
414c70cb LG |
787 | } |
788 | ||
e79055d6 | 789 | static int machine_constraints_voltage(struct regulator_dev *rdev, |
1083c393 | 790 | struct regulation_constraints *constraints) |
a5766f11 | 791 | { |
e5fda26c | 792 | struct regulator_ops *ops = rdev->desc->ops; |
af5866c9 MB |
793 | int ret; |
794 | ||
795 | /* do we need to apply the constraint voltage */ | |
796 | if (rdev->constraints->apply_uV && | |
75790251 MB |
797 | rdev->constraints->min_uV == rdev->constraints->max_uV) { |
798 | ret = _regulator_do_set_voltage(rdev, | |
799 | rdev->constraints->min_uV, | |
800 | rdev->constraints->max_uV); | |
801 | if (ret < 0) { | |
802 | rdev_err(rdev, "failed to apply %duV constraint\n", | |
803 | rdev->constraints->min_uV); | |
75790251 MB |
804 | return ret; |
805 | } | |
af5866c9 | 806 | } |
e06f5b4f | 807 | |
4367cfdc DB |
808 | /* constrain machine-level voltage specs to fit |
809 | * the actual range supported by this regulator. | |
810 | */ | |
811 | if (ops->list_voltage && rdev->desc->n_voltages) { | |
812 | int count = rdev->desc->n_voltages; | |
813 | int i; | |
814 | int min_uV = INT_MAX; | |
815 | int max_uV = INT_MIN; | |
816 | int cmin = constraints->min_uV; | |
817 | int cmax = constraints->max_uV; | |
818 | ||
3e590918 MB |
819 | /* it's safe to autoconfigure fixed-voltage supplies |
820 | and the constraints are used by list_voltage. */ | |
4367cfdc | 821 | if (count == 1 && !cmin) { |
3e590918 | 822 | cmin = 1; |
4367cfdc | 823 | cmax = INT_MAX; |
3e590918 MB |
824 | constraints->min_uV = cmin; |
825 | constraints->max_uV = cmax; | |
4367cfdc DB |
826 | } |
827 | ||
3e2b9abd MB |
828 | /* voltage constraints are optional */ |
829 | if ((cmin == 0) && (cmax == 0)) | |
e79055d6 | 830 | return 0; |
3e2b9abd | 831 | |
4367cfdc | 832 | /* else require explicit machine-level constraints */ |
3e2b9abd | 833 | if (cmin <= 0 || cmax <= 0 || cmax < cmin) { |
5da84fd9 | 834 | rdev_err(rdev, "invalid voltage constraints\n"); |
e79055d6 | 835 | return -EINVAL; |
4367cfdc DB |
836 | } |
837 | ||
838 | /* initial: [cmin..cmax] valid, [min_uV..max_uV] not */ | |
839 | for (i = 0; i < count; i++) { | |
840 | int value; | |
841 | ||
842 | value = ops->list_voltage(rdev, i); | |
843 | if (value <= 0) | |
844 | continue; | |
845 | ||
846 | /* maybe adjust [min_uV..max_uV] */ | |
847 | if (value >= cmin && value < min_uV) | |
848 | min_uV = value; | |
849 | if (value <= cmax && value > max_uV) | |
850 | max_uV = value; | |
851 | } | |
852 | ||
853 | /* final: [min_uV..max_uV] valid iff constraints valid */ | |
854 | if (max_uV < min_uV) { | |
5da84fd9 | 855 | rdev_err(rdev, "unsupportable voltage constraints\n"); |
e79055d6 | 856 | return -EINVAL; |
4367cfdc DB |
857 | } |
858 | ||
859 | /* use regulator's subset of machine constraints */ | |
860 | if (constraints->min_uV < min_uV) { | |
5da84fd9 JP |
861 | rdev_dbg(rdev, "override min_uV, %d -> %d\n", |
862 | constraints->min_uV, min_uV); | |
4367cfdc DB |
863 | constraints->min_uV = min_uV; |
864 | } | |
865 | if (constraints->max_uV > max_uV) { | |
5da84fd9 JP |
866 | rdev_dbg(rdev, "override max_uV, %d -> %d\n", |
867 | constraints->max_uV, max_uV); | |
4367cfdc DB |
868 | constraints->max_uV = max_uV; |
869 | } | |
870 | } | |
871 | ||
e79055d6 MB |
872 | return 0; |
873 | } | |
874 | ||
875 | /** | |
876 | * set_machine_constraints - sets regulator constraints | |
877 | * @rdev: regulator source | |
878 | * @constraints: constraints to apply | |
879 | * | |
880 | * Allows platform initialisation code to define and constrain | |
881 | * regulator circuits e.g. valid voltage/current ranges, etc. NOTE: | |
882 | * Constraints *must* be set by platform code in order for some | |
883 | * regulator operations to proceed i.e. set_voltage, set_current_limit, | |
884 | * set_mode. | |
885 | */ | |
886 | static int set_machine_constraints(struct regulator_dev *rdev, | |
f8c12fe3 | 887 | const struct regulation_constraints *constraints) |
e79055d6 MB |
888 | { |
889 | int ret = 0; | |
e79055d6 MB |
890 | struct regulator_ops *ops = rdev->desc->ops; |
891 | ||
9a8f5e07 MB |
892 | if (constraints) |
893 | rdev->constraints = kmemdup(constraints, sizeof(*constraints), | |
894 | GFP_KERNEL); | |
895 | else | |
896 | rdev->constraints = kzalloc(sizeof(*constraints), | |
897 | GFP_KERNEL); | |
f8c12fe3 MB |
898 | if (!rdev->constraints) |
899 | return -ENOMEM; | |
af5866c9 | 900 | |
f8c12fe3 | 901 | ret = machine_constraints_voltage(rdev, rdev->constraints); |
e79055d6 MB |
902 | if (ret != 0) |
903 | goto out; | |
904 | ||
a5766f11 | 905 | /* do we need to setup our suspend state */ |
9a8f5e07 | 906 | if (rdev->constraints->initial_state) { |
f8c12fe3 | 907 | ret = suspend_prepare(rdev, rdev->constraints->initial_state); |
e06f5b4f | 908 | if (ret < 0) { |
5da84fd9 | 909 | rdev_err(rdev, "failed to set suspend state\n"); |
e06f5b4f MB |
910 | goto out; |
911 | } | |
912 | } | |
a5766f11 | 913 | |
9a8f5e07 | 914 | if (rdev->constraints->initial_mode) { |
a308466c | 915 | if (!ops->set_mode) { |
5da84fd9 | 916 | rdev_err(rdev, "no set_mode operation\n"); |
a308466c MB |
917 | ret = -EINVAL; |
918 | goto out; | |
919 | } | |
920 | ||
f8c12fe3 | 921 | ret = ops->set_mode(rdev, rdev->constraints->initial_mode); |
a308466c | 922 | if (ret < 0) { |
5da84fd9 | 923 | rdev_err(rdev, "failed to set initial mode: %d\n", ret); |
a308466c MB |
924 | goto out; |
925 | } | |
926 | } | |
927 | ||
cacf90f2 MB |
928 | /* If the constraints say the regulator should be on at this point |
929 | * and we have control then make sure it is enabled. | |
930 | */ | |
f8c12fe3 MB |
931 | if ((rdev->constraints->always_on || rdev->constraints->boot_on) && |
932 | ops->enable) { | |
e5fda26c MB |
933 | ret = ops->enable(rdev); |
934 | if (ret < 0) { | |
5da84fd9 | 935 | rdev_err(rdev, "failed to enable\n"); |
e5fda26c MB |
936 | goto out; |
937 | } | |
938 | } | |
939 | ||
6f0b2c69 YSB |
940 | if (rdev->constraints->ramp_delay && ops->set_ramp_delay) { |
941 | ret = ops->set_ramp_delay(rdev, rdev->constraints->ramp_delay); | |
942 | if (ret < 0) { | |
943 | rdev_err(rdev, "failed to set ramp_delay\n"); | |
944 | goto out; | |
945 | } | |
946 | } | |
947 | ||
a5766f11 | 948 | print_constraints(rdev); |
1a6958e7 | 949 | return 0; |
a5766f11 | 950 | out: |
1a6958e7 AL |
951 | kfree(rdev->constraints); |
952 | rdev->constraints = NULL; | |
a5766f11 LG |
953 | return ret; |
954 | } | |
955 | ||
956 | /** | |
957 | * set_supply - set regulator supply regulator | |
69279fb9 MB |
958 | * @rdev: regulator name |
959 | * @supply_rdev: supply regulator name | |
a5766f11 LG |
960 | * |
961 | * Called by platform initialisation code to set the supply regulator for this | |
962 | * regulator. This ensures that a regulators supply will also be enabled by the | |
963 | * core if it's child is enabled. | |
964 | */ | |
965 | static int set_supply(struct regulator_dev *rdev, | |
3801b86a | 966 | struct regulator_dev *supply_rdev) |
a5766f11 LG |
967 | { |
968 | int err; | |
969 | ||
3801b86a MB |
970 | rdev_info(rdev, "supplied by %s\n", rdev_get_name(supply_rdev)); |
971 | ||
972 | rdev->supply = create_regulator(supply_rdev, &rdev->dev, "SUPPLY"); | |
32c78de8 AL |
973 | if (rdev->supply == NULL) { |
974 | err = -ENOMEM; | |
3801b86a | 975 | return err; |
a5766f11 | 976 | } |
3801b86a MB |
977 | |
978 | return 0; | |
a5766f11 LG |
979 | } |
980 | ||
981 | /** | |
06c63f93 | 982 | * set_consumer_device_supply - Bind a regulator to a symbolic supply |
69279fb9 | 983 | * @rdev: regulator source |
40f9244f | 984 | * @consumer_dev_name: dev_name() string for device supply applies to |
69279fb9 | 985 | * @supply: symbolic name for supply |
a5766f11 LG |
986 | * |
987 | * Allows platform initialisation code to map physical regulator | |
988 | * sources to symbolic names for supplies for use by devices. Devices | |
989 | * should use these symbolic names to request regulators, avoiding the | |
990 | * need to provide board-specific regulator names as platform data. | |
991 | */ | |
992 | static int set_consumer_device_supply(struct regulator_dev *rdev, | |
737f360d MB |
993 | const char *consumer_dev_name, |
994 | const char *supply) | |
a5766f11 LG |
995 | { |
996 | struct regulator_map *node; | |
9ed2099e | 997 | int has_dev; |
a5766f11 LG |
998 | |
999 | if (supply == NULL) | |
1000 | return -EINVAL; | |
1001 | ||
9ed2099e MB |
1002 | if (consumer_dev_name != NULL) |
1003 | has_dev = 1; | |
1004 | else | |
1005 | has_dev = 0; | |
1006 | ||
6001e13c | 1007 | list_for_each_entry(node, ®ulator_map_list, list) { |
23b5cc2a JN |
1008 | if (node->dev_name && consumer_dev_name) { |
1009 | if (strcmp(node->dev_name, consumer_dev_name) != 0) | |
1010 | continue; | |
1011 | } else if (node->dev_name || consumer_dev_name) { | |
6001e13c | 1012 | continue; |
23b5cc2a JN |
1013 | } |
1014 | ||
6001e13c DB |
1015 | if (strcmp(node->supply, supply) != 0) |
1016 | continue; | |
1017 | ||
737f360d MB |
1018 | pr_debug("%s: %s/%s is '%s' supply; fail %s/%s\n", |
1019 | consumer_dev_name, | |
1020 | dev_name(&node->regulator->dev), | |
1021 | node->regulator->desc->name, | |
1022 | supply, | |
1023 | dev_name(&rdev->dev), rdev_get_name(rdev)); | |
6001e13c DB |
1024 | return -EBUSY; |
1025 | } | |
1026 | ||
9ed2099e | 1027 | node = kzalloc(sizeof(struct regulator_map), GFP_KERNEL); |
a5766f11 LG |
1028 | if (node == NULL) |
1029 | return -ENOMEM; | |
1030 | ||
1031 | node->regulator = rdev; | |
a5766f11 LG |
1032 | node->supply = supply; |
1033 | ||
9ed2099e MB |
1034 | if (has_dev) { |
1035 | node->dev_name = kstrdup(consumer_dev_name, GFP_KERNEL); | |
1036 | if (node->dev_name == NULL) { | |
1037 | kfree(node); | |
1038 | return -ENOMEM; | |
1039 | } | |
40f9244f MB |
1040 | } |
1041 | ||
a5766f11 LG |
1042 | list_add(&node->list, ®ulator_map_list); |
1043 | return 0; | |
1044 | } | |
1045 | ||
0f1d747b MR |
1046 | static void unset_regulator_supplies(struct regulator_dev *rdev) |
1047 | { | |
1048 | struct regulator_map *node, *n; | |
1049 | ||
1050 | list_for_each_entry_safe(node, n, ®ulator_map_list, list) { | |
1051 | if (rdev == node->regulator) { | |
1052 | list_del(&node->list); | |
40f9244f | 1053 | kfree(node->dev_name); |
0f1d747b | 1054 | kfree(node); |
0f1d747b MR |
1055 | } |
1056 | } | |
1057 | } | |
1058 | ||
f5726ae3 | 1059 | #define REG_STR_SIZE 64 |
414c70cb LG |
1060 | |
1061 | static struct regulator *create_regulator(struct regulator_dev *rdev, | |
1062 | struct device *dev, | |
1063 | const char *supply_name) | |
1064 | { | |
1065 | struct regulator *regulator; | |
1066 | char buf[REG_STR_SIZE]; | |
1067 | int err, size; | |
1068 | ||
1069 | regulator = kzalloc(sizeof(*regulator), GFP_KERNEL); | |
1070 | if (regulator == NULL) | |
1071 | return NULL; | |
1072 | ||
1073 | mutex_lock(&rdev->mutex); | |
1074 | regulator->rdev = rdev; | |
1075 | list_add(®ulator->list, &rdev->consumer_list); | |
1076 | ||
1077 | if (dev) { | |
e2c98eaf SG |
1078 | regulator->dev = dev; |
1079 | ||
222cc7b1 | 1080 | /* Add a link to the device sysfs entry */ |
414c70cb LG |
1081 | size = scnprintf(buf, REG_STR_SIZE, "%s-%s", |
1082 | dev->kobj.name, supply_name); | |
1083 | if (size >= REG_STR_SIZE) | |
222cc7b1 | 1084 | goto overflow_err; |
414c70cb LG |
1085 | |
1086 | regulator->supply_name = kstrdup(buf, GFP_KERNEL); | |
1087 | if (regulator->supply_name == NULL) | |
222cc7b1 | 1088 | goto overflow_err; |
414c70cb LG |
1089 | |
1090 | err = sysfs_create_link(&rdev->dev.kobj, &dev->kobj, | |
1091 | buf); | |
1092 | if (err) { | |
5da84fd9 JP |
1093 | rdev_warn(rdev, "could not add device link %s err %d\n", |
1094 | dev->kobj.name, err); | |
222cc7b1 | 1095 | /* non-fatal */ |
414c70cb | 1096 | } |
5de70519 MB |
1097 | } else { |
1098 | regulator->supply_name = kstrdup(supply_name, GFP_KERNEL); | |
1099 | if (regulator->supply_name == NULL) | |
222cc7b1 | 1100 | goto overflow_err; |
5de70519 MB |
1101 | } |
1102 | ||
5de70519 MB |
1103 | regulator->debugfs = debugfs_create_dir(regulator->supply_name, |
1104 | rdev->debugfs); | |
24751434 | 1105 | if (!regulator->debugfs) { |
5de70519 | 1106 | rdev_warn(rdev, "Failed to create debugfs directory\n"); |
5de70519 MB |
1107 | } else { |
1108 | debugfs_create_u32("uA_load", 0444, regulator->debugfs, | |
1109 | ®ulator->uA_load); | |
1110 | debugfs_create_u32("min_uV", 0444, regulator->debugfs, | |
1111 | ®ulator->min_uV); | |
1112 | debugfs_create_u32("max_uV", 0444, regulator->debugfs, | |
1113 | ®ulator->max_uV); | |
414c70cb | 1114 | } |
5de70519 | 1115 | |
6492bc1b MB |
1116 | /* |
1117 | * Check now if the regulator is an always on regulator - if | |
1118 | * it is then we don't need to do nearly so much work for | |
1119 | * enable/disable calls. | |
1120 | */ | |
1121 | if (!_regulator_can_change_status(rdev) && | |
1122 | _regulator_is_enabled(rdev)) | |
1123 | regulator->always_on = true; | |
1124 | ||
414c70cb LG |
1125 | mutex_unlock(&rdev->mutex); |
1126 | return regulator; | |
414c70cb LG |
1127 | overflow_err: |
1128 | list_del(®ulator->list); | |
1129 | kfree(regulator); | |
1130 | mutex_unlock(&rdev->mutex); | |
1131 | return NULL; | |
1132 | } | |
1133 | ||
31aae2be MB |
1134 | static int _regulator_get_enable_time(struct regulator_dev *rdev) |
1135 | { | |
1136 | if (!rdev->desc->ops->enable_time) | |
79511ed3 | 1137 | return rdev->desc->enable_time; |
31aae2be MB |
1138 | return rdev->desc->ops->enable_time(rdev); |
1139 | } | |
1140 | ||
69511a45 | 1141 | static struct regulator_dev *regulator_dev_lookup(struct device *dev, |
6d191a5f MB |
1142 | const char *supply, |
1143 | int *ret) | |
69511a45 RN |
1144 | { |
1145 | struct regulator_dev *r; | |
1146 | struct device_node *node; | |
576ca436 MB |
1147 | struct regulator_map *map; |
1148 | const char *devname = NULL; | |
69511a45 RN |
1149 | |
1150 | /* first do a dt based lookup */ | |
1151 | if (dev && dev->of_node) { | |
1152 | node = of_get_regulator(dev, supply); | |
6d191a5f | 1153 | if (node) { |
69511a45 RN |
1154 | list_for_each_entry(r, ®ulator_list, list) |
1155 | if (r->dev.parent && | |
1156 | node == r->dev.of_node) | |
1157 | return r; | |
6d191a5f MB |
1158 | } else { |
1159 | /* | |
1160 | * If we couldn't even get the node then it's | |
1161 | * not just that the device didn't register | |
1162 | * yet, there's no node and we'll never | |
1163 | * succeed. | |
1164 | */ | |
1165 | *ret = -ENODEV; | |
1166 | } | |
69511a45 RN |
1167 | } |
1168 | ||
1169 | /* if not found, try doing it non-dt way */ | |
576ca436 MB |
1170 | if (dev) |
1171 | devname = dev_name(dev); | |
1172 | ||
69511a45 RN |
1173 | list_for_each_entry(r, ®ulator_list, list) |
1174 | if (strcmp(rdev_get_name(r), supply) == 0) | |
1175 | return r; | |
1176 | ||
576ca436 MB |
1177 | list_for_each_entry(map, ®ulator_map_list, list) { |
1178 | /* If the mapping has a device set up it must match */ | |
1179 | if (map->dev_name && | |
1180 | (!devname || strcmp(map->dev_name, devname))) | |
1181 | continue; | |
1182 | ||
1183 | if (strcmp(map->supply, supply) == 0) | |
1184 | return map->regulator; | |
1185 | } | |
1186 | ||
1187 | ||
69511a45 RN |
1188 | return NULL; |
1189 | } | |
1190 | ||
5ffbd136 MB |
1191 | /* Internal regulator request function */ |
1192 | static struct regulator *_regulator_get(struct device *dev, const char *id, | |
1193 | int exclusive) | |
414c70cb LG |
1194 | { |
1195 | struct regulator_dev *rdev; | |
04bf3011 | 1196 | struct regulator *regulator = ERR_PTR(-EPROBE_DEFER); |
40f9244f | 1197 | const char *devname = NULL; |
5ffbd136 | 1198 | int ret; |
414c70cb LG |
1199 | |
1200 | if (id == NULL) { | |
5da84fd9 | 1201 | pr_err("get() with no identifier\n"); |
414c70cb LG |
1202 | return regulator; |
1203 | } | |
1204 | ||
40f9244f MB |
1205 | if (dev) |
1206 | devname = dev_name(dev); | |
1207 | ||
414c70cb LG |
1208 | mutex_lock(®ulator_list_mutex); |
1209 | ||
6d191a5f | 1210 | rdev = regulator_dev_lookup(dev, id, &ret); |
69511a45 RN |
1211 | if (rdev) |
1212 | goto found; | |
1213 | ||
688fe99a MB |
1214 | if (board_wants_dummy_regulator) { |
1215 | rdev = dummy_regulator_rdev; | |
1216 | goto found; | |
1217 | } | |
1218 | ||
34abbd68 MB |
1219 | #ifdef CONFIG_REGULATOR_DUMMY |
1220 | if (!devname) | |
1221 | devname = "deviceless"; | |
1222 | ||
1223 | /* If the board didn't flag that it was fully constrained then | |
1224 | * substitute in a dummy regulator so consumers can continue. | |
1225 | */ | |
1226 | if (!has_full_constraints) { | |
5da84fd9 JP |
1227 | pr_warn("%s supply %s not found, using dummy regulator\n", |
1228 | devname, id); | |
34abbd68 MB |
1229 | rdev = dummy_regulator_rdev; |
1230 | goto found; | |
1231 | } | |
1232 | #endif | |
1233 | ||
414c70cb LG |
1234 | mutex_unlock(®ulator_list_mutex); |
1235 | return regulator; | |
1236 | ||
1237 | found: | |
5ffbd136 MB |
1238 | if (rdev->exclusive) { |
1239 | regulator = ERR_PTR(-EPERM); | |
1240 | goto out; | |
1241 | } | |
1242 | ||
1243 | if (exclusive && rdev->open_count) { | |
1244 | regulator = ERR_PTR(-EBUSY); | |
1245 | goto out; | |
1246 | } | |
1247 | ||
a5766f11 LG |
1248 | if (!try_module_get(rdev->owner)) |
1249 | goto out; | |
1250 | ||
414c70cb LG |
1251 | regulator = create_regulator(rdev, dev, id); |
1252 | if (regulator == NULL) { | |
1253 | regulator = ERR_PTR(-ENOMEM); | |
1254 | module_put(rdev->owner); | |
bcda4321 | 1255 | goto out; |
414c70cb LG |
1256 | } |
1257 | ||
5ffbd136 MB |
1258 | rdev->open_count++; |
1259 | if (exclusive) { | |
1260 | rdev->exclusive = 1; | |
1261 | ||
1262 | ret = _regulator_is_enabled(rdev); | |
1263 | if (ret > 0) | |
1264 | rdev->use_count = 1; | |
1265 | else | |
1266 | rdev->use_count = 0; | |
1267 | } | |
1268 | ||
a5766f11 | 1269 | out: |
414c70cb | 1270 | mutex_unlock(®ulator_list_mutex); |
5ffbd136 | 1271 | |
414c70cb LG |
1272 | return regulator; |
1273 | } | |
5ffbd136 MB |
1274 | |
1275 | /** | |
1276 | * regulator_get - lookup and obtain a reference to a regulator. | |
1277 | * @dev: device for regulator "consumer" | |
1278 | * @id: Supply name or regulator ID. | |
1279 | * | |
1280 | * Returns a struct regulator corresponding to the regulator producer, | |
1281 | * or IS_ERR() condition containing errno. | |
1282 | * | |
1283 | * Use of supply names configured via regulator_set_device_supply() is | |
1284 | * strongly encouraged. It is recommended that the supply name used | |
1285 | * should match the name used for the supply and/or the relevant | |
1286 | * device pins in the datasheet. | |
1287 | */ | |
1288 | struct regulator *regulator_get(struct device *dev, const char *id) | |
1289 | { | |
1290 | return _regulator_get(dev, id, 0); | |
1291 | } | |
414c70cb LG |
1292 | EXPORT_SYMBOL_GPL(regulator_get); |
1293 | ||
070b9079 SB |
1294 | static void devm_regulator_release(struct device *dev, void *res) |
1295 | { | |
1296 | regulator_put(*(struct regulator **)res); | |
1297 | } | |
1298 | ||
1299 | /** | |
1300 | * devm_regulator_get - Resource managed regulator_get() | |
1301 | * @dev: device for regulator "consumer" | |
1302 | * @id: Supply name or regulator ID. | |
1303 | * | |
1304 | * Managed regulator_get(). Regulators returned from this function are | |
1305 | * automatically regulator_put() on driver detach. See regulator_get() for more | |
1306 | * information. | |
1307 | */ | |
1308 | struct regulator *devm_regulator_get(struct device *dev, const char *id) | |
1309 | { | |
1310 | struct regulator **ptr, *regulator; | |
1311 | ||
1312 | ptr = devres_alloc(devm_regulator_release, sizeof(*ptr), GFP_KERNEL); | |
1313 | if (!ptr) | |
1314 | return ERR_PTR(-ENOMEM); | |
1315 | ||
1316 | regulator = regulator_get(dev, id); | |
1317 | if (!IS_ERR(regulator)) { | |
1318 | *ptr = regulator; | |
1319 | devres_add(dev, ptr); | |
1320 | } else { | |
1321 | devres_free(ptr); | |
1322 | } | |
1323 | ||
1324 | return regulator; | |
1325 | } | |
1326 | EXPORT_SYMBOL_GPL(devm_regulator_get); | |
1327 | ||
5ffbd136 MB |
1328 | /** |
1329 | * regulator_get_exclusive - obtain exclusive access to a regulator. | |
1330 | * @dev: device for regulator "consumer" | |
1331 | * @id: Supply name or regulator ID. | |
1332 | * | |
1333 | * Returns a struct regulator corresponding to the regulator producer, | |
1334 | * or IS_ERR() condition containing errno. Other consumers will be | |
1335 | * unable to obtain this reference is held and the use count for the | |
1336 | * regulator will be initialised to reflect the current state of the | |
1337 | * regulator. | |
1338 | * | |
1339 | * This is intended for use by consumers which cannot tolerate shared | |
1340 | * use of the regulator such as those which need to force the | |
1341 | * regulator off for correct operation of the hardware they are | |
1342 | * controlling. | |
1343 | * | |
1344 | * Use of supply names configured via regulator_set_device_supply() is | |
1345 | * strongly encouraged. It is recommended that the supply name used | |
1346 | * should match the name used for the supply and/or the relevant | |
1347 | * device pins in the datasheet. | |
1348 | */ | |
1349 | struct regulator *regulator_get_exclusive(struct device *dev, const char *id) | |
1350 | { | |
1351 | return _regulator_get(dev, id, 1); | |
1352 | } | |
1353 | EXPORT_SYMBOL_GPL(regulator_get_exclusive); | |
1354 | ||
414c70cb LG |
1355 | /** |
1356 | * regulator_put - "free" the regulator source | |
1357 | * @regulator: regulator source | |
1358 | * | |
1359 | * Note: drivers must ensure that all regulator_enable calls made on this | |
1360 | * regulator source are balanced by regulator_disable calls prior to calling | |
1361 | * this function. | |
1362 | */ | |
1363 | void regulator_put(struct regulator *regulator) | |
1364 | { | |
1365 | struct regulator_dev *rdev; | |
1366 | ||
1367 | if (regulator == NULL || IS_ERR(regulator)) | |
1368 | return; | |
1369 | ||
414c70cb LG |
1370 | mutex_lock(®ulator_list_mutex); |
1371 | rdev = regulator->rdev; | |
1372 | ||
5de70519 | 1373 | debugfs_remove_recursive(regulator->debugfs); |
5de70519 | 1374 | |
414c70cb | 1375 | /* remove any sysfs entries */ |
e2c98eaf | 1376 | if (regulator->dev) |
414c70cb | 1377 | sysfs_remove_link(&rdev->dev.kobj, regulator->supply_name); |
5de70519 | 1378 | kfree(regulator->supply_name); |
414c70cb LG |
1379 | list_del(®ulator->list); |
1380 | kfree(regulator); | |
1381 | ||
5ffbd136 MB |
1382 | rdev->open_count--; |
1383 | rdev->exclusive = 0; | |
1384 | ||
414c70cb LG |
1385 | module_put(rdev->owner); |
1386 | mutex_unlock(®ulator_list_mutex); | |
1387 | } | |
1388 | EXPORT_SYMBOL_GPL(regulator_put); | |
1389 | ||
d5ad34f7 MB |
1390 | static int devm_regulator_match(struct device *dev, void *res, void *data) |
1391 | { | |
1392 | struct regulator **r = res; | |
1393 | if (!r || !*r) { | |
1394 | WARN_ON(!r || !*r); | |
1395 | return 0; | |
1396 | } | |
1397 | return *r == data; | |
1398 | } | |
1399 | ||
1400 | /** | |
1401 | * devm_regulator_put - Resource managed regulator_put() | |
1402 | * @regulator: regulator to free | |
1403 | * | |
1404 | * Deallocate a regulator allocated with devm_regulator_get(). Normally | |
1405 | * this function will not need to be called and the resource management | |
1406 | * code will ensure that the resource is freed. | |
1407 | */ | |
1408 | void devm_regulator_put(struct regulator *regulator) | |
1409 | { | |
1410 | int rc; | |
1411 | ||
361ff501 | 1412 | rc = devres_release(regulator->dev, devm_regulator_release, |
d5ad34f7 | 1413 | devm_regulator_match, regulator); |
230a5a1c | 1414 | if (rc != 0) |
968c2c17 | 1415 | WARN_ON(rc); |
d5ad34f7 MB |
1416 | } |
1417 | EXPORT_SYMBOL_GPL(devm_regulator_put); | |
1418 | ||
5c5659d0 MB |
1419 | static int _regulator_do_enable(struct regulator_dev *rdev) |
1420 | { | |
1421 | int ret, delay; | |
1422 | ||
1423 | /* Query before enabling in case configuration dependent. */ | |
1424 | ret = _regulator_get_enable_time(rdev); | |
1425 | if (ret >= 0) { | |
1426 | delay = ret; | |
1427 | } else { | |
1428 | rdev_warn(rdev, "enable_time() failed: %d\n", ret); | |
1429 | delay = 0; | |
1430 | } | |
1431 | ||
1432 | trace_regulator_enable(rdev_get_name(rdev)); | |
1433 | ||
65f73508 MB |
1434 | if (rdev->ena_gpio) { |
1435 | gpio_set_value_cansleep(rdev->ena_gpio, | |
1436 | !rdev->ena_gpio_invert); | |
1437 | rdev->ena_gpio_state = 1; | |
1438 | } else if (rdev->desc->ops->enable) { | |
5c5659d0 MB |
1439 | ret = rdev->desc->ops->enable(rdev); |
1440 | if (ret < 0) | |
1441 | return ret; | |
1442 | } else { | |
1443 | return -EINVAL; | |
1444 | } | |
1445 | ||
1446 | /* Allow the regulator to ramp; it would be useful to extend | |
1447 | * this for bulk operations so that the regulators can ramp | |
1448 | * together. */ | |
1449 | trace_regulator_enable_delay(rdev_get_name(rdev)); | |
1450 | ||
1451 | if (delay >= 1000) { | |
1452 | mdelay(delay / 1000); | |
1453 | udelay(delay % 1000); | |
1454 | } else if (delay) { | |
1455 | udelay(delay); | |
1456 | } | |
1457 | ||
1458 | trace_regulator_enable_complete(rdev_get_name(rdev)); | |
1459 | ||
1460 | return 0; | |
1461 | } | |
1462 | ||
414c70cb LG |
1463 | /* locks held by regulator_enable() */ |
1464 | static int _regulator_enable(struct regulator_dev *rdev) | |
1465 | { | |
5c5659d0 | 1466 | int ret; |
414c70cb | 1467 | |
414c70cb | 1468 | /* check voltage and requested load before enabling */ |
9a2372fa MB |
1469 | if (rdev->constraints && |
1470 | (rdev->constraints->valid_ops_mask & REGULATOR_CHANGE_DRMS)) | |
1471 | drms_uA_update(rdev); | |
414c70cb | 1472 | |
9a2372fa MB |
1473 | if (rdev->use_count == 0) { |
1474 | /* The regulator may on if it's not switchable or left on */ | |
1475 | ret = _regulator_is_enabled(rdev); | |
1476 | if (ret == -EINVAL || ret == 0) { | |
1477 | if (!_regulator_can_change_status(rdev)) | |
1478 | return -EPERM; | |
1479 | ||
5c5659d0 | 1480 | ret = _regulator_do_enable(rdev); |
31aae2be MB |
1481 | if (ret < 0) |
1482 | return ret; | |
1483 | ||
a7433cff | 1484 | } else if (ret < 0) { |
5da84fd9 | 1485 | rdev_err(rdev, "is_enabled() failed: %d\n", ret); |
414c70cb LG |
1486 | return ret; |
1487 | } | |
a7433cff | 1488 | /* Fallthrough on positive return values - already enabled */ |
414c70cb LG |
1489 | } |
1490 | ||
9a2372fa MB |
1491 | rdev->use_count++; |
1492 | ||
1493 | return 0; | |
414c70cb LG |
1494 | } |
1495 | ||
1496 | /** | |
1497 | * regulator_enable - enable regulator output | |
1498 | * @regulator: regulator source | |
1499 | * | |
cf7bbcdf MB |
1500 | * Request that the regulator be enabled with the regulator output at |
1501 | * the predefined voltage or current value. Calls to regulator_enable() | |
1502 | * must be balanced with calls to regulator_disable(). | |
1503 | * | |
414c70cb | 1504 | * NOTE: the output value can be set by other drivers, boot loader or may be |
cf7bbcdf | 1505 | * hardwired in the regulator. |
414c70cb LG |
1506 | */ |
1507 | int regulator_enable(struct regulator *regulator) | |
1508 | { | |
412aec61 DB |
1509 | struct regulator_dev *rdev = regulator->rdev; |
1510 | int ret = 0; | |
414c70cb | 1511 | |
6492bc1b MB |
1512 | if (regulator->always_on) |
1513 | return 0; | |
1514 | ||
3801b86a MB |
1515 | if (rdev->supply) { |
1516 | ret = regulator_enable(rdev->supply); | |
1517 | if (ret != 0) | |
1518 | return ret; | |
1519 | } | |
1520 | ||
412aec61 | 1521 | mutex_lock(&rdev->mutex); |
cd94b505 | 1522 | ret = _regulator_enable(rdev); |
412aec61 | 1523 | mutex_unlock(&rdev->mutex); |
3801b86a | 1524 | |
d1685e4e | 1525 | if (ret != 0 && rdev->supply) |
3801b86a MB |
1526 | regulator_disable(rdev->supply); |
1527 | ||
414c70cb LG |
1528 | return ret; |
1529 | } | |
1530 | EXPORT_SYMBOL_GPL(regulator_enable); | |
1531 | ||
5c5659d0 MB |
1532 | static int _regulator_do_disable(struct regulator_dev *rdev) |
1533 | { | |
1534 | int ret; | |
1535 | ||
1536 | trace_regulator_disable(rdev_get_name(rdev)); | |
1537 | ||
1538 | if (rdev->ena_gpio) { | |
1539 | gpio_set_value_cansleep(rdev->ena_gpio, | |
1540 | rdev->ena_gpio_invert); | |
1541 | rdev->ena_gpio_state = 0; | |
1542 | ||
1543 | } else if (rdev->desc->ops->disable) { | |
1544 | ret = rdev->desc->ops->disable(rdev); | |
1545 | if (ret != 0) | |
1546 | return ret; | |
1547 | } | |
1548 | ||
1549 | trace_regulator_disable_complete(rdev_get_name(rdev)); | |
1550 | ||
1551 | _notifier_call_chain(rdev, REGULATOR_EVENT_DISABLE, | |
1552 | NULL); | |
1553 | return 0; | |
1554 | } | |
1555 | ||
414c70cb | 1556 | /* locks held by regulator_disable() */ |
3801b86a | 1557 | static int _regulator_disable(struct regulator_dev *rdev) |
414c70cb LG |
1558 | { |
1559 | int ret = 0; | |
1560 | ||
cd94b505 | 1561 | if (WARN(rdev->use_count <= 0, |
43e7ee33 | 1562 | "unbalanced disables for %s\n", rdev_get_name(rdev))) |
cd94b505 DB |
1563 | return -EIO; |
1564 | ||
414c70cb | 1565 | /* are we the last user and permitted to disable ? */ |
60ef66fc MB |
1566 | if (rdev->use_count == 1 && |
1567 | (rdev->constraints && !rdev->constraints->always_on)) { | |
414c70cb LG |
1568 | |
1569 | /* we are last user */ | |
5c5659d0 MB |
1570 | if (_regulator_can_change_status(rdev)) { |
1571 | ret = _regulator_do_disable(rdev); | |
414c70cb | 1572 | if (ret < 0) { |
5da84fd9 | 1573 | rdev_err(rdev, "failed to disable\n"); |
414c70cb LG |
1574 | return ret; |
1575 | } | |
1576 | } | |
1577 | ||
414c70cb LG |
1578 | rdev->use_count = 0; |
1579 | } else if (rdev->use_count > 1) { | |
1580 | ||
1581 | if (rdev->constraints && | |
1582 | (rdev->constraints->valid_ops_mask & | |
1583 | REGULATOR_CHANGE_DRMS)) | |
1584 | drms_uA_update(rdev); | |
1585 | ||
1586 | rdev->use_count--; | |
1587 | } | |
3801b86a | 1588 | |
414c70cb LG |
1589 | return ret; |
1590 | } | |
1591 | ||
1592 | /** | |
1593 | * regulator_disable - disable regulator output | |
1594 | * @regulator: regulator source | |
1595 | * | |
cf7bbcdf MB |
1596 | * Disable the regulator output voltage or current. Calls to |
1597 | * regulator_enable() must be balanced with calls to | |
1598 | * regulator_disable(). | |
69279fb9 | 1599 | * |
414c70cb | 1600 | * NOTE: this will only disable the regulator output if no other consumer |
cf7bbcdf MB |
1601 | * devices have it enabled, the regulator device supports disabling and |
1602 | * machine constraints permit this operation. | |
414c70cb LG |
1603 | */ |
1604 | int regulator_disable(struct regulator *regulator) | |
1605 | { | |
412aec61 DB |
1606 | struct regulator_dev *rdev = regulator->rdev; |
1607 | int ret = 0; | |
414c70cb | 1608 | |
6492bc1b MB |
1609 | if (regulator->always_on) |
1610 | return 0; | |
1611 | ||
412aec61 | 1612 | mutex_lock(&rdev->mutex); |
3801b86a | 1613 | ret = _regulator_disable(rdev); |
412aec61 | 1614 | mutex_unlock(&rdev->mutex); |
8cbf811d | 1615 | |
3801b86a MB |
1616 | if (ret == 0 && rdev->supply) |
1617 | regulator_disable(rdev->supply); | |
8cbf811d | 1618 | |
414c70cb LG |
1619 | return ret; |
1620 | } | |
1621 | EXPORT_SYMBOL_GPL(regulator_disable); | |
1622 | ||
1623 | /* locks held by regulator_force_disable() */ | |
3801b86a | 1624 | static int _regulator_force_disable(struct regulator_dev *rdev) |
414c70cb LG |
1625 | { |
1626 | int ret = 0; | |
1627 | ||
1628 | /* force disable */ | |
1629 | if (rdev->desc->ops->disable) { | |
1630 | /* ah well, who wants to live forever... */ | |
1631 | ret = rdev->desc->ops->disable(rdev); | |
1632 | if (ret < 0) { | |
5da84fd9 | 1633 | rdev_err(rdev, "failed to force disable\n"); |
414c70cb LG |
1634 | return ret; |
1635 | } | |
1636 | /* notify other consumers that power has been forced off */ | |
84b68263 MB |
1637 | _notifier_call_chain(rdev, REGULATOR_EVENT_FORCE_DISABLE | |
1638 | REGULATOR_EVENT_DISABLE, NULL); | |
414c70cb LG |
1639 | } |
1640 | ||
414c70cb LG |
1641 | return ret; |
1642 | } | |
1643 | ||
1644 | /** | |
1645 | * regulator_force_disable - force disable regulator output | |
1646 | * @regulator: regulator source | |
1647 | * | |
1648 | * Forcibly disable the regulator output voltage or current. | |
1649 | * NOTE: this *will* disable the regulator output even if other consumer | |
1650 | * devices have it enabled. This should be used for situations when device | |
1651 | * damage will likely occur if the regulator is not disabled (e.g. over temp). | |
1652 | */ | |
1653 | int regulator_force_disable(struct regulator *regulator) | |
1654 | { | |
82d15839 | 1655 | struct regulator_dev *rdev = regulator->rdev; |
414c70cb LG |
1656 | int ret; |
1657 | ||
82d15839 | 1658 | mutex_lock(&rdev->mutex); |
414c70cb | 1659 | regulator->uA_load = 0; |
3801b86a | 1660 | ret = _regulator_force_disable(regulator->rdev); |
82d15839 | 1661 | mutex_unlock(&rdev->mutex); |
8cbf811d | 1662 | |
3801b86a MB |
1663 | if (rdev->supply) |
1664 | while (rdev->open_count--) | |
1665 | regulator_disable(rdev->supply); | |
8cbf811d | 1666 | |
414c70cb LG |
1667 | return ret; |
1668 | } | |
1669 | EXPORT_SYMBOL_GPL(regulator_force_disable); | |
1670 | ||
da07ecd9 MB |
1671 | static void regulator_disable_work(struct work_struct *work) |
1672 | { | |
1673 | struct regulator_dev *rdev = container_of(work, struct regulator_dev, | |
1674 | disable_work.work); | |
1675 | int count, i, ret; | |
1676 | ||
1677 | mutex_lock(&rdev->mutex); | |
1678 | ||
1679 | BUG_ON(!rdev->deferred_disables); | |
1680 | ||
1681 | count = rdev->deferred_disables; | |
1682 | rdev->deferred_disables = 0; | |
1683 | ||
1684 | for (i = 0; i < count; i++) { | |
1685 | ret = _regulator_disable(rdev); | |
1686 | if (ret != 0) | |
1687 | rdev_err(rdev, "Deferred disable failed: %d\n", ret); | |
1688 | } | |
1689 | ||
1690 | mutex_unlock(&rdev->mutex); | |
1691 | ||
1692 | if (rdev->supply) { | |
1693 | for (i = 0; i < count; i++) { | |
1694 | ret = regulator_disable(rdev->supply); | |
1695 | if (ret != 0) { | |
1696 | rdev_err(rdev, | |
1697 | "Supply disable failed: %d\n", ret); | |
1698 | } | |
1699 | } | |
1700 | } | |
1701 | } | |
1702 | ||
1703 | /** | |
1704 | * regulator_disable_deferred - disable regulator output with delay | |
1705 | * @regulator: regulator source | |
1706 | * @ms: miliseconds until the regulator is disabled | |
1707 | * | |
1708 | * Execute regulator_disable() on the regulator after a delay. This | |
1709 | * is intended for use with devices that require some time to quiesce. | |
1710 | * | |
1711 | * NOTE: this will only disable the regulator output if no other consumer | |
1712 | * devices have it enabled, the regulator device supports disabling and | |
1713 | * machine constraints permit this operation. | |
1714 | */ | |
1715 | int regulator_disable_deferred(struct regulator *regulator, int ms) | |
1716 | { | |
1717 | struct regulator_dev *rdev = regulator->rdev; | |
aa59802d | 1718 | int ret; |
da07ecd9 | 1719 | |
6492bc1b MB |
1720 | if (regulator->always_on) |
1721 | return 0; | |
1722 | ||
da07ecd9 MB |
1723 | mutex_lock(&rdev->mutex); |
1724 | rdev->deferred_disables++; | |
1725 | mutex_unlock(&rdev->mutex); | |
1726 | ||
aa59802d MB |
1727 | ret = schedule_delayed_work(&rdev->disable_work, |
1728 | msecs_to_jiffies(ms)); | |
1729 | if (ret < 0) | |
1730 | return ret; | |
1731 | else | |
1732 | return 0; | |
da07ecd9 MB |
1733 | } |
1734 | EXPORT_SYMBOL_GPL(regulator_disable_deferred); | |
1735 | ||
cd6dffb4 MB |
1736 | /** |
1737 | * regulator_is_enabled_regmap - standard is_enabled() for regmap users | |
1738 | * | |
1739 | * @rdev: regulator to operate on | |
1740 | * | |
1741 | * Regulators that use regmap for their register I/O can set the | |
1742 | * enable_reg and enable_mask fields in their descriptor and then use | |
1743 | * this as their is_enabled operation, saving some code. | |
1744 | */ | |
1745 | int regulator_is_enabled_regmap(struct regulator_dev *rdev) | |
1746 | { | |
1747 | unsigned int val; | |
1748 | int ret; | |
1749 | ||
1750 | ret = regmap_read(rdev->regmap, rdev->desc->enable_reg, &val); | |
1751 | if (ret != 0) | |
1752 | return ret; | |
1753 | ||
1754 | return (val & rdev->desc->enable_mask) != 0; | |
1755 | } | |
1756 | EXPORT_SYMBOL_GPL(regulator_is_enabled_regmap); | |
1757 | ||
1758 | /** | |
1759 | * regulator_enable_regmap - standard enable() for regmap users | |
1760 | * | |
1761 | * @rdev: regulator to operate on | |
1762 | * | |
1763 | * Regulators that use regmap for their register I/O can set the | |
1764 | * enable_reg and enable_mask fields in their descriptor and then use | |
1765 | * this as their enable() operation, saving some code. | |
1766 | */ | |
1767 | int regulator_enable_regmap(struct regulator_dev *rdev) | |
1768 | { | |
1769 | return regmap_update_bits(rdev->regmap, rdev->desc->enable_reg, | |
1770 | rdev->desc->enable_mask, | |
1771 | rdev->desc->enable_mask); | |
1772 | } | |
1773 | EXPORT_SYMBOL_GPL(regulator_enable_regmap); | |
1774 | ||
1775 | /** | |
1776 | * regulator_disable_regmap - standard disable() for regmap users | |
1777 | * | |
1778 | * @rdev: regulator to operate on | |
1779 | * | |
1780 | * Regulators that use regmap for their register I/O can set the | |
1781 | * enable_reg and enable_mask fields in their descriptor and then use | |
1782 | * this as their disable() operation, saving some code. | |
1783 | */ | |
1784 | int regulator_disable_regmap(struct regulator_dev *rdev) | |
1785 | { | |
1786 | return regmap_update_bits(rdev->regmap, rdev->desc->enable_reg, | |
1787 | rdev->desc->enable_mask, 0); | |
1788 | } | |
1789 | EXPORT_SYMBOL_GPL(regulator_disable_regmap); | |
1790 | ||
414c70cb LG |
1791 | static int _regulator_is_enabled(struct regulator_dev *rdev) |
1792 | { | |
65f73508 MB |
1793 | /* A GPIO control always takes precedence */ |
1794 | if (rdev->ena_gpio) | |
1795 | return rdev->ena_gpio_state; | |
1796 | ||
9a7f6a4c | 1797 | /* If we don't know then assume that the regulator is always on */ |
9332546f | 1798 | if (!rdev->desc->ops->is_enabled) |
9a7f6a4c | 1799 | return 1; |
414c70cb | 1800 | |
9332546f | 1801 | return rdev->desc->ops->is_enabled(rdev); |
414c70cb LG |
1802 | } |
1803 | ||
1804 | /** | |
1805 | * regulator_is_enabled - is the regulator output enabled | |
1806 | * @regulator: regulator source | |
1807 | * | |
412aec61 DB |
1808 | * Returns positive if the regulator driver backing the source/client |
1809 | * has requested that the device be enabled, zero if it hasn't, else a | |
1810 | * negative errno code. | |
1811 | * | |
1812 | * Note that the device backing this regulator handle can have multiple | |
1813 | * users, so it might be enabled even if regulator_enable() was never | |
1814 | * called for this particular source. | |
414c70cb LG |
1815 | */ |
1816 | int regulator_is_enabled(struct regulator *regulator) | |
1817 | { | |
9332546f MB |
1818 | int ret; |
1819 | ||
6492bc1b MB |
1820 | if (regulator->always_on) |
1821 | return 1; | |
1822 | ||
9332546f MB |
1823 | mutex_lock(®ulator->rdev->mutex); |
1824 | ret = _regulator_is_enabled(regulator->rdev); | |
1825 | mutex_unlock(®ulator->rdev->mutex); | |
1826 | ||
1827 | return ret; | |
414c70cb LG |
1828 | } |
1829 | EXPORT_SYMBOL_GPL(regulator_is_enabled); | |
1830 | ||
4367cfdc DB |
1831 | /** |
1832 | * regulator_count_voltages - count regulator_list_voltage() selectors | |
1833 | * @regulator: regulator source | |
1834 | * | |
1835 | * Returns number of selectors, or negative errno. Selectors are | |
1836 | * numbered starting at zero, and typically correspond to bitfields | |
1837 | * in hardware registers. | |
1838 | */ | |
1839 | int regulator_count_voltages(struct regulator *regulator) | |
1840 | { | |
1841 | struct regulator_dev *rdev = regulator->rdev; | |
1842 | ||
1843 | return rdev->desc->n_voltages ? : -EINVAL; | |
1844 | } | |
1845 | EXPORT_SYMBOL_GPL(regulator_count_voltages); | |
1846 | ||
bca7bbff MB |
1847 | /** |
1848 | * regulator_list_voltage_linear - List voltages with simple calculation | |
1849 | * | |
1850 | * @rdev: Regulator device | |
1851 | * @selector: Selector to convert into a voltage | |
1852 | * | |
1853 | * Regulators with a simple linear mapping between voltages and | |
1854 | * selectors can set min_uV and uV_step in the regulator descriptor | |
1855 | * and then use this function as their list_voltage() operation, | |
1856 | */ | |
1857 | int regulator_list_voltage_linear(struct regulator_dev *rdev, | |
1858 | unsigned int selector) | |
1859 | { | |
1860 | if (selector >= rdev->desc->n_voltages) | |
1861 | return -EINVAL; | |
1862 | ||
1863 | return rdev->desc->min_uV + (rdev->desc->uV_step * selector); | |
1864 | } | |
1865 | EXPORT_SYMBOL_GPL(regulator_list_voltage_linear); | |
1866 | ||
cffc9592 AL |
1867 | /** |
1868 | * regulator_list_voltage_table - List voltages with table based mapping | |
1869 | * | |
1870 | * @rdev: Regulator device | |
1871 | * @selector: Selector to convert into a voltage | |
1872 | * | |
1873 | * Regulators with table based mapping between voltages and | |
1874 | * selectors can set volt_table in the regulator descriptor | |
1875 | * and then use this function as their list_voltage() operation. | |
1876 | */ | |
1877 | int regulator_list_voltage_table(struct regulator_dev *rdev, | |
1878 | unsigned int selector) | |
1879 | { | |
1880 | if (!rdev->desc->volt_table) { | |
1881 | BUG_ON(!rdev->desc->volt_table); | |
1882 | return -EINVAL; | |
1883 | } | |
1884 | ||
1885 | if (selector >= rdev->desc->n_voltages) | |
1886 | return -EINVAL; | |
1887 | ||
1888 | return rdev->desc->volt_table[selector]; | |
1889 | } | |
1890 | EXPORT_SYMBOL_GPL(regulator_list_voltage_table); | |
1891 | ||
4367cfdc DB |
1892 | /** |
1893 | * regulator_list_voltage - enumerate supported voltages | |
1894 | * @regulator: regulator source | |
1895 | * @selector: identify voltage to list | |
1896 | * Context: can sleep | |
1897 | * | |
1898 | * Returns a voltage that can be passed to @regulator_set_voltage(), | |
88393161 | 1899 | * zero if this selector code can't be used on this system, or a |
4367cfdc DB |
1900 | * negative errno. |
1901 | */ | |
1902 | int regulator_list_voltage(struct regulator *regulator, unsigned selector) | |
1903 | { | |
1904 | struct regulator_dev *rdev = regulator->rdev; | |
1905 | struct regulator_ops *ops = rdev->desc->ops; | |
1906 | int ret; | |
1907 | ||
1908 | if (!ops->list_voltage || selector >= rdev->desc->n_voltages) | |
1909 | return -EINVAL; | |
1910 | ||
1911 | mutex_lock(&rdev->mutex); | |
1912 | ret = ops->list_voltage(rdev, selector); | |
1913 | mutex_unlock(&rdev->mutex); | |
1914 | ||
1915 | if (ret > 0) { | |
1916 | if (ret < rdev->constraints->min_uV) | |
1917 | ret = 0; | |
1918 | else if (ret > rdev->constraints->max_uV) | |
1919 | ret = 0; | |
1920 | } | |
1921 | ||
1922 | return ret; | |
1923 | } | |
1924 | EXPORT_SYMBOL_GPL(regulator_list_voltage); | |
1925 | ||
a7a1ad90 MB |
1926 | /** |
1927 | * regulator_is_supported_voltage - check if a voltage range can be supported | |
1928 | * | |
1929 | * @regulator: Regulator to check. | |
1930 | * @min_uV: Minimum required voltage in uV. | |
1931 | * @max_uV: Maximum required voltage in uV. | |
1932 | * | |
1933 | * Returns a boolean or a negative error code. | |
1934 | */ | |
1935 | int regulator_is_supported_voltage(struct regulator *regulator, | |
1936 | int min_uV, int max_uV) | |
1937 | { | |
c5f3939b | 1938 | struct regulator_dev *rdev = regulator->rdev; |
a7a1ad90 MB |
1939 | int i, voltages, ret; |
1940 | ||
c5f3939b MB |
1941 | /* If we can't change voltage check the current voltage */ |
1942 | if (!(rdev->constraints->valid_ops_mask & REGULATOR_CHANGE_VOLTAGE)) { | |
1943 | ret = regulator_get_voltage(regulator); | |
1944 | if (ret >= 0) | |
1945 | return (min_uV >= ret && ret <= max_uV); | |
1946 | else | |
1947 | return ret; | |
1948 | } | |
1949 | ||
a7a1ad90 MB |
1950 | ret = regulator_count_voltages(regulator); |
1951 | if (ret < 0) | |
1952 | return ret; | |
1953 | voltages = ret; | |
1954 | ||
1955 | for (i = 0; i < voltages; i++) { | |
1956 | ret = regulator_list_voltage(regulator, i); | |
1957 | ||
1958 | if (ret >= min_uV && ret <= max_uV) | |
1959 | return 1; | |
1960 | } | |
1961 | ||
1962 | return 0; | |
1963 | } | |
a398eaa2 | 1964 | EXPORT_SYMBOL_GPL(regulator_is_supported_voltage); |
a7a1ad90 | 1965 | |
4ab5b3d9 MB |
1966 | /** |
1967 | * regulator_get_voltage_sel_regmap - standard get_voltage_sel for regmap users | |
1968 | * | |
1969 | * @rdev: regulator to operate on | |
1970 | * | |
1971 | * Regulators that use regmap for their register I/O can set the | |
1972 | * vsel_reg and vsel_mask fields in their descriptor and then use this | |
1973 | * as their get_voltage_vsel operation, saving some code. | |
1974 | */ | |
1975 | int regulator_get_voltage_sel_regmap(struct regulator_dev *rdev) | |
1976 | { | |
1977 | unsigned int val; | |
1978 | int ret; | |
1979 | ||
1980 | ret = regmap_read(rdev->regmap, rdev->desc->vsel_reg, &val); | |
1981 | if (ret != 0) | |
1982 | return ret; | |
1983 | ||
1984 | val &= rdev->desc->vsel_mask; | |
1985 | val >>= ffs(rdev->desc->vsel_mask) - 1; | |
1986 | ||
1987 | return val; | |
1988 | } | |
1989 | EXPORT_SYMBOL_GPL(regulator_get_voltage_sel_regmap); | |
1990 | ||
1991 | /** | |
1992 | * regulator_set_voltage_sel_regmap - standard set_voltage_sel for regmap users | |
1993 | * | |
1994 | * @rdev: regulator to operate on | |
1995 | * @sel: Selector to set | |
1996 | * | |
1997 | * Regulators that use regmap for their register I/O can set the | |
1998 | * vsel_reg and vsel_mask fields in their descriptor and then use this | |
1999 | * as their set_voltage_vsel operation, saving some code. | |
2000 | */ | |
2001 | int regulator_set_voltage_sel_regmap(struct regulator_dev *rdev, unsigned sel) | |
2002 | { | |
2003 | sel <<= ffs(rdev->desc->vsel_mask) - 1; | |
2004 | ||
2005 | return regmap_update_bits(rdev->regmap, rdev->desc->vsel_reg, | |
2006 | rdev->desc->vsel_mask, sel); | |
2007 | } | |
2008 | EXPORT_SYMBOL_GPL(regulator_set_voltage_sel_regmap); | |
2009 | ||
e843fc46 MB |
2010 | /** |
2011 | * regulator_map_voltage_iterate - map_voltage() based on list_voltage() | |
2012 | * | |
2013 | * @rdev: Regulator to operate on | |
2014 | * @min_uV: Lower bound for voltage | |
2015 | * @max_uV: Upper bound for voltage | |
2016 | * | |
2017 | * Drivers implementing set_voltage_sel() and list_voltage() can use | |
2018 | * this as their map_voltage() operation. It will find a suitable | |
2019 | * voltage by calling list_voltage() until it gets something in bounds | |
2020 | * for the requested voltages. | |
2021 | */ | |
2022 | int regulator_map_voltage_iterate(struct regulator_dev *rdev, | |
2023 | int min_uV, int max_uV) | |
2024 | { | |
2025 | int best_val = INT_MAX; | |
2026 | int selector = 0; | |
2027 | int i, ret; | |
2028 | ||
2029 | /* Find the smallest voltage that falls within the specified | |
2030 | * range. | |
2031 | */ | |
2032 | for (i = 0; i < rdev->desc->n_voltages; i++) { | |
2033 | ret = rdev->desc->ops->list_voltage(rdev, i); | |
2034 | if (ret < 0) | |
2035 | continue; | |
2036 | ||
2037 | if (ret < best_val && ret >= min_uV && ret <= max_uV) { | |
2038 | best_val = ret; | |
2039 | selector = i; | |
2040 | } | |
2041 | } | |
2042 | ||
2043 | if (best_val != INT_MAX) | |
2044 | return selector; | |
2045 | else | |
2046 | return -EINVAL; | |
2047 | } | |
2048 | EXPORT_SYMBOL_GPL(regulator_map_voltage_iterate); | |
2049 | ||
bca7bbff MB |
2050 | /** |
2051 | * regulator_map_voltage_linear - map_voltage() for simple linear mappings | |
2052 | * | |
2053 | * @rdev: Regulator to operate on | |
2054 | * @min_uV: Lower bound for voltage | |
2055 | * @max_uV: Upper bound for voltage | |
2056 | * | |
2057 | * Drivers providing min_uV and uV_step in their regulator_desc can | |
2058 | * use this as their map_voltage() operation. | |
2059 | */ | |
2060 | int regulator_map_voltage_linear(struct regulator_dev *rdev, | |
2061 | int min_uV, int max_uV) | |
2062 | { | |
2063 | int ret, voltage; | |
2064 | ||
5a6881e8 AL |
2065 | /* Allow uV_step to be 0 for fixed voltage */ |
2066 | if (rdev->desc->n_voltages == 1 && rdev->desc->uV_step == 0) { | |
2067 | if (min_uV <= rdev->desc->min_uV && rdev->desc->min_uV <= max_uV) | |
2068 | return 0; | |
2069 | else | |
2070 | return -EINVAL; | |
2071 | } | |
2072 | ||
bca7bbff MB |
2073 | if (!rdev->desc->uV_step) { |
2074 | BUG_ON(!rdev->desc->uV_step); | |
2075 | return -EINVAL; | |
2076 | } | |
2077 | ||
0bdc81e4 AL |
2078 | if (min_uV < rdev->desc->min_uV) |
2079 | min_uV = rdev->desc->min_uV; | |
2080 | ||
ccfcb1c3 | 2081 | ret = DIV_ROUND_UP(min_uV - rdev->desc->min_uV, rdev->desc->uV_step); |
bca7bbff MB |
2082 | if (ret < 0) |
2083 | return ret; | |
2084 | ||
2085 | /* Map back into a voltage to verify we're still in bounds */ | |
2086 | voltage = rdev->desc->ops->list_voltage(rdev, ret); | |
2087 | if (voltage < min_uV || voltage > max_uV) | |
2088 | return -EINVAL; | |
2089 | ||
2090 | return ret; | |
2091 | } | |
2092 | EXPORT_SYMBOL_GPL(regulator_map_voltage_linear); | |
2093 | ||
75790251 MB |
2094 | static int _regulator_do_set_voltage(struct regulator_dev *rdev, |
2095 | int min_uV, int max_uV) | |
2096 | { | |
2097 | int ret; | |
77af1b26 | 2098 | int delay = 0; |
e113d792 | 2099 | int best_val = 0; |
75790251 | 2100 | unsigned int selector; |
eba41a5e | 2101 | int old_selector = -1; |
75790251 MB |
2102 | |
2103 | trace_regulator_set_voltage(rdev_get_name(rdev), min_uV, max_uV); | |
2104 | ||
bf5892a8 MB |
2105 | min_uV += rdev->constraints->uV_offset; |
2106 | max_uV += rdev->constraints->uV_offset; | |
2107 | ||
eba41a5e AL |
2108 | /* |
2109 | * If we can't obtain the old selector there is not enough | |
2110 | * info to call set_voltage_time_sel(). | |
2111 | */ | |
8b7485ef AL |
2112 | if (_regulator_is_enabled(rdev) && |
2113 | rdev->desc->ops->set_voltage_time_sel && | |
eba41a5e AL |
2114 | rdev->desc->ops->get_voltage_sel) { |
2115 | old_selector = rdev->desc->ops->get_voltage_sel(rdev); | |
2116 | if (old_selector < 0) | |
2117 | return old_selector; | |
2118 | } | |
2119 | ||
75790251 MB |
2120 | if (rdev->desc->ops->set_voltage) { |
2121 | ret = rdev->desc->ops->set_voltage(rdev, min_uV, max_uV, | |
2122 | &selector); | |
e113d792 MB |
2123 | |
2124 | if (ret >= 0) { | |
2125 | if (rdev->desc->ops->list_voltage) | |
2126 | best_val = rdev->desc->ops->list_voltage(rdev, | |
2127 | selector); | |
2128 | else | |
2129 | best_val = _regulator_get_voltage(rdev); | |
2130 | } | |
2131 | ||
e8eef82b | 2132 | } else if (rdev->desc->ops->set_voltage_sel) { |
9152c36a | 2133 | if (rdev->desc->ops->map_voltage) { |
e843fc46 MB |
2134 | ret = rdev->desc->ops->map_voltage(rdev, min_uV, |
2135 | max_uV); | |
9152c36a AL |
2136 | } else { |
2137 | if (rdev->desc->ops->list_voltage == | |
2138 | regulator_list_voltage_linear) | |
2139 | ret = regulator_map_voltage_linear(rdev, | |
2140 | min_uV, max_uV); | |
2141 | else | |
2142 | ret = regulator_map_voltage_iterate(rdev, | |
2143 | min_uV, max_uV); | |
2144 | } | |
e8eef82b | 2145 | |
e843fc46 | 2146 | if (ret >= 0) { |
e113d792 MB |
2147 | best_val = rdev->desc->ops->list_voltage(rdev, ret); |
2148 | if (min_uV <= best_val && max_uV >= best_val) { | |
2149 | selector = ret; | |
2150 | ret = rdev->desc->ops->set_voltage_sel(rdev, | |
2151 | ret); | |
2152 | } else { | |
2153 | ret = -EINVAL; | |
2154 | } | |
e8eef82b | 2155 | } |
75790251 MB |
2156 | } else { |
2157 | ret = -EINVAL; | |
2158 | } | |
e8eef82b | 2159 | |
eba41a5e | 2160 | /* Call set_voltage_time_sel if successfully obtained old_selector */ |
5aff3a8b | 2161 | if (ret == 0 && _regulator_is_enabled(rdev) && old_selector >= 0 && |
eba41a5e | 2162 | rdev->desc->ops->set_voltage_time_sel) { |
77af1b26 | 2163 | |
eba41a5e AL |
2164 | delay = rdev->desc->ops->set_voltage_time_sel(rdev, |
2165 | old_selector, selector); | |
2166 | if (delay < 0) { | |
2167 | rdev_warn(rdev, "set_voltage_time_sel() failed: %d\n", | |
2168 | delay); | |
2169 | delay = 0; | |
e8eef82b | 2170 | } |
75790251 | 2171 | |
8b96de31 PR |
2172 | /* Insert any necessary delays */ |
2173 | if (delay >= 1000) { | |
2174 | mdelay(delay / 1000); | |
2175 | udelay(delay % 1000); | |
2176 | } else if (delay) { | |
2177 | udelay(delay); | |
2178 | } | |
77af1b26 LW |
2179 | } |
2180 | ||
2f7baf89 | 2181 | if (ret == 0 && best_val >= 0) |
ded06a52 | 2182 | _notifier_call_chain(rdev, REGULATOR_EVENT_VOLTAGE_CHANGE, |
2f7baf89 | 2183 | (void *)best_val); |
ded06a52 | 2184 | |
eba41a5e | 2185 | trace_regulator_set_voltage_complete(rdev_get_name(rdev), best_val); |
75790251 MB |
2186 | |
2187 | return ret; | |
2188 | } | |
2189 | ||
414c70cb LG |
2190 | /** |
2191 | * regulator_set_voltage - set regulator output voltage | |
2192 | * @regulator: regulator source | |
2193 | * @min_uV: Minimum required voltage in uV | |
2194 | * @max_uV: Maximum acceptable voltage in uV | |
2195 | * | |
2196 | * Sets a voltage regulator to the desired output voltage. This can be set | |
2197 | * during any regulator state. IOW, regulator can be disabled or enabled. | |
2198 | * | |
2199 | * If the regulator is enabled then the voltage will change to the new value | |
2200 | * immediately otherwise if the regulator is disabled the regulator will | |
2201 | * output at the new voltage when enabled. | |
2202 | * | |
2203 | * NOTE: If the regulator is shared between several devices then the lowest | |
2204 | * request voltage that meets the system constraints will be used. | |
69279fb9 | 2205 | * Regulator system constraints must be set for this regulator before |
414c70cb LG |
2206 | * calling this function otherwise this call will fail. |
2207 | */ | |
2208 | int regulator_set_voltage(struct regulator *regulator, int min_uV, int max_uV) | |
2209 | { | |
2210 | struct regulator_dev *rdev = regulator->rdev; | |
95a3c23a | 2211 | int ret = 0; |
414c70cb LG |
2212 | |
2213 | mutex_lock(&rdev->mutex); | |
2214 | ||
95a3c23a MB |
2215 | /* If we're setting the same range as last time the change |
2216 | * should be a noop (some cpufreq implementations use the same | |
2217 | * voltage for multiple frequencies, for example). | |
2218 | */ | |
2219 | if (regulator->min_uV == min_uV && regulator->max_uV == max_uV) | |
2220 | goto out; | |
2221 | ||
414c70cb | 2222 | /* sanity check */ |
e8eef82b MB |
2223 | if (!rdev->desc->ops->set_voltage && |
2224 | !rdev->desc->ops->set_voltage_sel) { | |
414c70cb LG |
2225 | ret = -EINVAL; |
2226 | goto out; | |
2227 | } | |
2228 | ||
2229 | /* constraints check */ | |
2230 | ret = regulator_check_voltage(rdev, &min_uV, &max_uV); | |
2231 | if (ret < 0) | |
2232 | goto out; | |
2233 | regulator->min_uV = min_uV; | |
2234 | regulator->max_uV = max_uV; | |
3a93f2a9 | 2235 | |
05fda3b1 TP |
2236 | ret = regulator_check_consumers(rdev, &min_uV, &max_uV); |
2237 | if (ret < 0) | |
2238 | goto out; | |
2239 | ||
75790251 | 2240 | ret = _regulator_do_set_voltage(rdev, min_uV, max_uV); |
02fa3ec0 | 2241 | |
414c70cb LG |
2242 | out: |
2243 | mutex_unlock(&rdev->mutex); | |
2244 | return ret; | |
2245 | } | |
2246 | EXPORT_SYMBOL_GPL(regulator_set_voltage); | |
2247 | ||
88cd222b LW |
2248 | /** |
2249 | * regulator_set_voltage_time - get raise/fall time | |
2250 | * @regulator: regulator source | |
2251 | * @old_uV: starting voltage in microvolts | |
2252 | * @new_uV: target voltage in microvolts | |
2253 | * | |
2254 | * Provided with the starting and ending voltage, this function attempts to | |
2255 | * calculate the time in microseconds required to rise or fall to this new | |
2256 | * voltage. | |
2257 | */ | |
2258 | int regulator_set_voltage_time(struct regulator *regulator, | |
2259 | int old_uV, int new_uV) | |
2260 | { | |
2261 | struct regulator_dev *rdev = regulator->rdev; | |
2262 | struct regulator_ops *ops = rdev->desc->ops; | |
2263 | int old_sel = -1; | |
2264 | int new_sel = -1; | |
2265 | int voltage; | |
2266 | int i; | |
2267 | ||
2268 | /* Currently requires operations to do this */ | |
2269 | if (!ops->list_voltage || !ops->set_voltage_time_sel | |
2270 | || !rdev->desc->n_voltages) | |
2271 | return -EINVAL; | |
2272 | ||
2273 | for (i = 0; i < rdev->desc->n_voltages; i++) { | |
2274 | /* We only look for exact voltage matches here */ | |
2275 | voltage = regulator_list_voltage(regulator, i); | |
2276 | if (voltage < 0) | |
2277 | return -EINVAL; | |
2278 | if (voltage == 0) | |
2279 | continue; | |
2280 | if (voltage == old_uV) | |
2281 | old_sel = i; | |
2282 | if (voltage == new_uV) | |
2283 | new_sel = i; | |
2284 | } | |
2285 | ||
2286 | if (old_sel < 0 || new_sel < 0) | |
2287 | return -EINVAL; | |
2288 | ||
2289 | return ops->set_voltage_time_sel(rdev, old_sel, new_sel); | |
2290 | } | |
2291 | EXPORT_SYMBOL_GPL(regulator_set_voltage_time); | |
2292 | ||
98a175b6 YSB |
2293 | /** |
2294 | *regulator_set_voltage_time_sel - get raise/fall time | |
2295 | * @regulator: regulator source | |
2296 | * @old_selector: selector for starting voltage | |
2297 | * @new_selector: selector for target voltage | |
2298 | * | |
2299 | * Provided with the starting and target voltage selectors, this function | |
2300 | * returns time in microseconds required to rise or fall to this new voltage | |
2301 | * | |
f11d08c3 | 2302 | * Drivers providing ramp_delay in regulation_constraints can use this as their |
398715ab | 2303 | * set_voltage_time_sel() operation. |
98a175b6 YSB |
2304 | */ |
2305 | int regulator_set_voltage_time_sel(struct regulator_dev *rdev, | |
2306 | unsigned int old_selector, | |
2307 | unsigned int new_selector) | |
2308 | { | |
398715ab | 2309 | unsigned int ramp_delay = 0; |
f11d08c3 | 2310 | int old_volt, new_volt; |
398715ab AL |
2311 | |
2312 | if (rdev->constraints->ramp_delay) | |
2313 | ramp_delay = rdev->constraints->ramp_delay; | |
2314 | else if (rdev->desc->ramp_delay) | |
2315 | ramp_delay = rdev->desc->ramp_delay; | |
2316 | ||
2317 | if (ramp_delay == 0) { | |
6f0b2c69 | 2318 | rdev_warn(rdev, "ramp_delay not set\n"); |
398715ab | 2319 | return 0; |
6f0b2c69 | 2320 | } |
398715ab | 2321 | |
f11d08c3 AL |
2322 | /* sanity check */ |
2323 | if (!rdev->desc->ops->list_voltage) | |
2324 | return -EINVAL; | |
398715ab | 2325 | |
f11d08c3 AL |
2326 | old_volt = rdev->desc->ops->list_voltage(rdev, old_selector); |
2327 | new_volt = rdev->desc->ops->list_voltage(rdev, new_selector); | |
2328 | ||
2329 | return DIV_ROUND_UP(abs(new_volt - old_volt), ramp_delay); | |
98a175b6 | 2330 | } |
b19dbf71 | 2331 | EXPORT_SYMBOL_GPL(regulator_set_voltage_time_sel); |
98a175b6 | 2332 | |
606a2562 MB |
2333 | /** |
2334 | * regulator_sync_voltage - re-apply last regulator output voltage | |
2335 | * @regulator: regulator source | |
2336 | * | |
2337 | * Re-apply the last configured voltage. This is intended to be used | |
2338 | * where some external control source the consumer is cooperating with | |
2339 | * has caused the configured voltage to change. | |
2340 | */ | |
2341 | int regulator_sync_voltage(struct regulator *regulator) | |
2342 | { | |
2343 | struct regulator_dev *rdev = regulator->rdev; | |
2344 | int ret, min_uV, max_uV; | |
2345 | ||
2346 | mutex_lock(&rdev->mutex); | |
2347 | ||
2348 | if (!rdev->desc->ops->set_voltage && | |
2349 | !rdev->desc->ops->set_voltage_sel) { | |
2350 | ret = -EINVAL; | |
2351 | goto out; | |
2352 | } | |
2353 | ||
2354 | /* This is only going to work if we've had a voltage configured. */ | |
2355 | if (!regulator->min_uV && !regulator->max_uV) { | |
2356 | ret = -EINVAL; | |
2357 | goto out; | |
2358 | } | |
2359 | ||
2360 | min_uV = regulator->min_uV; | |
2361 | max_uV = regulator->max_uV; | |
2362 | ||
2363 | /* This should be a paranoia check... */ | |
2364 | ret = regulator_check_voltage(rdev, &min_uV, &max_uV); | |
2365 | if (ret < 0) | |
2366 | goto out; | |
2367 | ||
2368 | ret = regulator_check_consumers(rdev, &min_uV, &max_uV); | |
2369 | if (ret < 0) | |
2370 | goto out; | |
2371 | ||
2372 | ret = _regulator_do_set_voltage(rdev, min_uV, max_uV); | |
2373 | ||
2374 | out: | |
2375 | mutex_unlock(&rdev->mutex); | |
2376 | return ret; | |
2377 | } | |
2378 | EXPORT_SYMBOL_GPL(regulator_sync_voltage); | |
2379 | ||
414c70cb LG |
2380 | static int _regulator_get_voltage(struct regulator_dev *rdev) |
2381 | { | |
bf5892a8 | 2382 | int sel, ret; |
476c2d83 MB |
2383 | |
2384 | if (rdev->desc->ops->get_voltage_sel) { | |
2385 | sel = rdev->desc->ops->get_voltage_sel(rdev); | |
2386 | if (sel < 0) | |
2387 | return sel; | |
bf5892a8 | 2388 | ret = rdev->desc->ops->list_voltage(rdev, sel); |
cb220d16 | 2389 | } else if (rdev->desc->ops->get_voltage) { |
bf5892a8 | 2390 | ret = rdev->desc->ops->get_voltage(rdev); |
cb220d16 | 2391 | } else { |
414c70cb | 2392 | return -EINVAL; |
cb220d16 | 2393 | } |
bf5892a8 | 2394 | |
cb220d16 AL |
2395 | if (ret < 0) |
2396 | return ret; | |
bf5892a8 | 2397 | return ret - rdev->constraints->uV_offset; |
414c70cb LG |
2398 | } |
2399 | ||
2400 | /** | |
2401 | * regulator_get_voltage - get regulator output voltage | |
2402 | * @regulator: regulator source | |
2403 | * | |
2404 | * This returns the current regulator voltage in uV. | |
2405 | * | |
2406 | * NOTE: If the regulator is disabled it will return the voltage value. This | |
2407 | * function should not be used to determine regulator state. | |
2408 | */ | |
2409 | int regulator_get_voltage(struct regulator *regulator) | |
2410 | { | |
2411 | int ret; | |
2412 | ||
2413 | mutex_lock(®ulator->rdev->mutex); | |
2414 | ||
2415 | ret = _regulator_get_voltage(regulator->rdev); | |
2416 | ||
2417 | mutex_unlock(®ulator->rdev->mutex); | |
2418 | ||
2419 | return ret; | |
2420 | } | |
2421 | EXPORT_SYMBOL_GPL(regulator_get_voltage); | |
2422 | ||
2423 | /** | |
2424 | * regulator_set_current_limit - set regulator output current limit | |
2425 | * @regulator: regulator source | |
2426 | * @min_uA: Minimuum supported current in uA | |
2427 | * @max_uA: Maximum supported current in uA | |
2428 | * | |
2429 | * Sets current sink to the desired output current. This can be set during | |
2430 | * any regulator state. IOW, regulator can be disabled or enabled. | |
2431 | * | |
2432 | * If the regulator is enabled then the current will change to the new value | |
2433 | * immediately otherwise if the regulator is disabled the regulator will | |
2434 | * output at the new current when enabled. | |
2435 | * | |
2436 | * NOTE: Regulator system constraints must be set for this regulator before | |
2437 | * calling this function otherwise this call will fail. | |
2438 | */ | |
2439 | int regulator_set_current_limit(struct regulator *regulator, | |
2440 | int min_uA, int max_uA) | |
2441 | { | |
2442 | struct regulator_dev *rdev = regulator->rdev; | |
2443 | int ret; | |
2444 | ||
2445 | mutex_lock(&rdev->mutex); | |
2446 | ||
2447 | /* sanity check */ | |
2448 | if (!rdev->desc->ops->set_current_limit) { | |
2449 | ret = -EINVAL; | |
2450 | goto out; | |
2451 | } | |
2452 | ||
2453 | /* constraints check */ | |
2454 | ret = regulator_check_current_limit(rdev, &min_uA, &max_uA); | |
2455 | if (ret < 0) | |
2456 | goto out; | |
2457 | ||
2458 | ret = rdev->desc->ops->set_current_limit(rdev, min_uA, max_uA); | |
2459 | out: | |
2460 | mutex_unlock(&rdev->mutex); | |
2461 | return ret; | |
2462 | } | |
2463 | EXPORT_SYMBOL_GPL(regulator_set_current_limit); | |
2464 | ||
2465 | static int _regulator_get_current_limit(struct regulator_dev *rdev) | |
2466 | { | |
2467 | int ret; | |
2468 | ||
2469 | mutex_lock(&rdev->mutex); | |
2470 | ||
2471 | /* sanity check */ | |
2472 | if (!rdev->desc->ops->get_current_limit) { | |
2473 | ret = -EINVAL; | |
2474 | goto out; | |
2475 | } | |
2476 | ||
2477 | ret = rdev->desc->ops->get_current_limit(rdev); | |
2478 | out: | |
2479 | mutex_unlock(&rdev->mutex); | |
2480 | return ret; | |
2481 | } | |
2482 | ||
2483 | /** | |
2484 | * regulator_get_current_limit - get regulator output current | |
2485 | * @regulator: regulator source | |
2486 | * | |
2487 | * This returns the current supplied by the specified current sink in uA. | |
2488 | * | |
2489 | * NOTE: If the regulator is disabled it will return the current value. This | |
2490 | * function should not be used to determine regulator state. | |
2491 | */ | |
2492 | int regulator_get_current_limit(struct regulator *regulator) | |
2493 | { | |
2494 | return _regulator_get_current_limit(regulator->rdev); | |
2495 | } | |
2496 | EXPORT_SYMBOL_GPL(regulator_get_current_limit); | |
2497 | ||
2498 | /** | |
2499 | * regulator_set_mode - set regulator operating mode | |
2500 | * @regulator: regulator source | |
2501 | * @mode: operating mode - one of the REGULATOR_MODE constants | |
2502 | * | |
2503 | * Set regulator operating mode to increase regulator efficiency or improve | |
2504 | * regulation performance. | |
2505 | * | |
2506 | * NOTE: Regulator system constraints must be set for this regulator before | |
2507 | * calling this function otherwise this call will fail. | |
2508 | */ | |
2509 | int regulator_set_mode(struct regulator *regulator, unsigned int mode) | |
2510 | { | |
2511 | struct regulator_dev *rdev = regulator->rdev; | |
2512 | int ret; | |
500b4ac9 | 2513 | int regulator_curr_mode; |
414c70cb LG |
2514 | |
2515 | mutex_lock(&rdev->mutex); | |
2516 | ||
2517 | /* sanity check */ | |
2518 | if (!rdev->desc->ops->set_mode) { | |
2519 | ret = -EINVAL; | |
2520 | goto out; | |
2521 | } | |
2522 | ||
500b4ac9 SI |
2523 | /* return if the same mode is requested */ |
2524 | if (rdev->desc->ops->get_mode) { | |
2525 | regulator_curr_mode = rdev->desc->ops->get_mode(rdev); | |
2526 | if (regulator_curr_mode == mode) { | |
2527 | ret = 0; | |
2528 | goto out; | |
2529 | } | |
2530 | } | |
2531 | ||
414c70cb | 2532 | /* constraints check */ |
22c51b47 | 2533 | ret = regulator_mode_constrain(rdev, &mode); |
414c70cb LG |
2534 | if (ret < 0) |
2535 | goto out; | |
2536 | ||
2537 | ret = rdev->desc->ops->set_mode(rdev, mode); | |
2538 | out: | |
2539 | mutex_unlock(&rdev->mutex); | |
2540 | return ret; | |
2541 | } | |
2542 | EXPORT_SYMBOL_GPL(regulator_set_mode); | |
2543 | ||
2544 | static unsigned int _regulator_get_mode(struct regulator_dev *rdev) | |
2545 | { | |
2546 | int ret; | |
2547 | ||
2548 | mutex_lock(&rdev->mutex); | |
2549 | ||
2550 | /* sanity check */ | |
2551 | if (!rdev->desc->ops->get_mode) { | |
2552 | ret = -EINVAL; | |
2553 | goto out; | |
2554 | } | |
2555 | ||
2556 | ret = rdev->desc->ops->get_mode(rdev); | |
2557 | out: | |
2558 | mutex_unlock(&rdev->mutex); | |
2559 | return ret; | |
2560 | } | |
2561 | ||
2562 | /** | |
2563 | * regulator_get_mode - get regulator operating mode | |
2564 | * @regulator: regulator source | |
2565 | * | |
2566 | * Get the current regulator operating mode. | |
2567 | */ | |
2568 | unsigned int regulator_get_mode(struct regulator *regulator) | |
2569 | { | |
2570 | return _regulator_get_mode(regulator->rdev); | |
2571 | } | |
2572 | EXPORT_SYMBOL_GPL(regulator_get_mode); | |
2573 | ||
2574 | /** | |
2575 | * regulator_set_optimum_mode - set regulator optimum operating mode | |
2576 | * @regulator: regulator source | |
2577 | * @uA_load: load current | |
2578 | * | |
2579 | * Notifies the regulator core of a new device load. This is then used by | |
2580 | * DRMS (if enabled by constraints) to set the most efficient regulator | |
2581 | * operating mode for the new regulator loading. | |
2582 | * | |
2583 | * Consumer devices notify their supply regulator of the maximum power | |
2584 | * they will require (can be taken from device datasheet in the power | |
2585 | * consumption tables) when they change operational status and hence power | |
2586 | * state. Examples of operational state changes that can affect power | |
2587 | * consumption are :- | |
2588 | * | |
2589 | * o Device is opened / closed. | |
2590 | * o Device I/O is about to begin or has just finished. | |
2591 | * o Device is idling in between work. | |
2592 | * | |
2593 | * This information is also exported via sysfs to userspace. | |
2594 | * | |
2595 | * DRMS will sum the total requested load on the regulator and change | |
2596 | * to the most efficient operating mode if platform constraints allow. | |
2597 | * | |
2598 | * Returns the new regulator mode or error. | |
2599 | */ | |
2600 | int regulator_set_optimum_mode(struct regulator *regulator, int uA_load) | |
2601 | { | |
2602 | struct regulator_dev *rdev = regulator->rdev; | |
2603 | struct regulator *consumer; | |
d92d95b6 | 2604 | int ret, output_uV, input_uV = 0, total_uA_load = 0; |
414c70cb LG |
2605 | unsigned int mode; |
2606 | ||
d92d95b6 SB |
2607 | if (rdev->supply) |
2608 | input_uV = regulator_get_voltage(rdev->supply); | |
2609 | ||
414c70cb LG |
2610 | mutex_lock(&rdev->mutex); |
2611 | ||
a4b41483 MB |
2612 | /* |
2613 | * first check to see if we can set modes at all, otherwise just | |
2614 | * tell the consumer everything is OK. | |
2615 | */ | |
414c70cb LG |
2616 | regulator->uA_load = uA_load; |
2617 | ret = regulator_check_drms(rdev); | |
a4b41483 MB |
2618 | if (ret < 0) { |
2619 | ret = 0; | |
414c70cb | 2620 | goto out; |
a4b41483 | 2621 | } |
414c70cb | 2622 | |
414c70cb LG |
2623 | if (!rdev->desc->ops->get_optimum_mode) |
2624 | goto out; | |
2625 | ||
a4b41483 MB |
2626 | /* |
2627 | * we can actually do this so any errors are indicators of | |
2628 | * potential real failure. | |
2629 | */ | |
2630 | ret = -EINVAL; | |
2631 | ||
854ccbae AL |
2632 | if (!rdev->desc->ops->set_mode) |
2633 | goto out; | |
2634 | ||
414c70cb | 2635 | /* get output voltage */ |
1bf5a1f8 | 2636 | output_uV = _regulator_get_voltage(rdev); |
414c70cb | 2637 | if (output_uV <= 0) { |
5da84fd9 | 2638 | rdev_err(rdev, "invalid output voltage found\n"); |
414c70cb LG |
2639 | goto out; |
2640 | } | |
2641 | ||
d92d95b6 | 2642 | /* No supply? Use constraint voltage */ |
1bf5a1f8 | 2643 | if (input_uV <= 0) |
414c70cb LG |
2644 | input_uV = rdev->constraints->input_uV; |
2645 | if (input_uV <= 0) { | |
5da84fd9 | 2646 | rdev_err(rdev, "invalid input voltage found\n"); |
414c70cb LG |
2647 | goto out; |
2648 | } | |
2649 | ||
2650 | /* calc total requested load for this regulator */ | |
2651 | list_for_each_entry(consumer, &rdev->consumer_list, list) | |
fa2984d4 | 2652 | total_uA_load += consumer->uA_load; |
414c70cb LG |
2653 | |
2654 | mode = rdev->desc->ops->get_optimum_mode(rdev, | |
2655 | input_uV, output_uV, | |
2656 | total_uA_load); | |
2c608234 | 2657 | ret = regulator_mode_constrain(rdev, &mode); |
e573520b | 2658 | if (ret < 0) { |
5da84fd9 JP |
2659 | rdev_err(rdev, "failed to get optimum mode @ %d uA %d -> %d uV\n", |
2660 | total_uA_load, input_uV, output_uV); | |
414c70cb LG |
2661 | goto out; |
2662 | } | |
2663 | ||
2664 | ret = rdev->desc->ops->set_mode(rdev, mode); | |
e573520b | 2665 | if (ret < 0) { |
5da84fd9 | 2666 | rdev_err(rdev, "failed to set optimum mode %x\n", mode); |
414c70cb LG |
2667 | goto out; |
2668 | } | |
2669 | ret = mode; | |
2670 | out: | |
2671 | mutex_unlock(&rdev->mutex); | |
2672 | return ret; | |
2673 | } | |
2674 | EXPORT_SYMBOL_GPL(regulator_set_optimum_mode); | |
2675 | ||
2676 | /** | |
2677 | * regulator_register_notifier - register regulator event notifier | |
2678 | * @regulator: regulator source | |
69279fb9 | 2679 | * @nb: notifier block |
414c70cb LG |
2680 | * |
2681 | * Register notifier block to receive regulator events. | |
2682 | */ | |
2683 | int regulator_register_notifier(struct regulator *regulator, | |
2684 | struct notifier_block *nb) | |
2685 | { | |
2686 | return blocking_notifier_chain_register(®ulator->rdev->notifier, | |
2687 | nb); | |
2688 | } | |
2689 | EXPORT_SYMBOL_GPL(regulator_register_notifier); | |
2690 | ||
2691 | /** | |
2692 | * regulator_unregister_notifier - unregister regulator event notifier | |
2693 | * @regulator: regulator source | |
69279fb9 | 2694 | * @nb: notifier block |
414c70cb LG |
2695 | * |
2696 | * Unregister regulator event notifier block. | |
2697 | */ | |
2698 | int regulator_unregister_notifier(struct regulator *regulator, | |
2699 | struct notifier_block *nb) | |
2700 | { | |
2701 | return blocking_notifier_chain_unregister(®ulator->rdev->notifier, | |
2702 | nb); | |
2703 | } | |
2704 | EXPORT_SYMBOL_GPL(regulator_unregister_notifier); | |
2705 | ||
b136fb44 JC |
2706 | /* notify regulator consumers and downstream regulator consumers. |
2707 | * Note mutex must be held by caller. | |
2708 | */ | |
414c70cb LG |
2709 | static void _notifier_call_chain(struct regulator_dev *rdev, |
2710 | unsigned long event, void *data) | |
2711 | { | |
414c70cb | 2712 | /* call rdev chain first */ |
d8493d21 | 2713 | blocking_notifier_call_chain(&rdev->notifier, event, data); |
414c70cb LG |
2714 | } |
2715 | ||
2716 | /** | |
2717 | * regulator_bulk_get - get multiple regulator consumers | |
2718 | * | |
2719 | * @dev: Device to supply | |
2720 | * @num_consumers: Number of consumers to register | |
2721 | * @consumers: Configuration of consumers; clients are stored here. | |
2722 | * | |
2723 | * @return 0 on success, an errno on failure. | |
2724 | * | |
2725 | * This helper function allows drivers to get several regulator | |
2726 | * consumers in one operation. If any of the regulators cannot be | |
2727 | * acquired then any regulators that were allocated will be freed | |
2728 | * before returning to the caller. | |
2729 | */ | |
2730 | int regulator_bulk_get(struct device *dev, int num_consumers, | |
2731 | struct regulator_bulk_data *consumers) | |
2732 | { | |
2733 | int i; | |
2734 | int ret; | |
2735 | ||
2736 | for (i = 0; i < num_consumers; i++) | |
2737 | consumers[i].consumer = NULL; | |
2738 | ||
2739 | for (i = 0; i < num_consumers; i++) { | |
2740 | consumers[i].consumer = regulator_get(dev, | |
2741 | consumers[i].supply); | |
2742 | if (IS_ERR(consumers[i].consumer)) { | |
414c70cb | 2743 | ret = PTR_ERR(consumers[i].consumer); |
5b307627 MB |
2744 | dev_err(dev, "Failed to get supply '%s': %d\n", |
2745 | consumers[i].supply, ret); | |
414c70cb LG |
2746 | consumers[i].consumer = NULL; |
2747 | goto err; | |
2748 | } | |
2749 | } | |
2750 | ||
2751 | return 0; | |
2752 | ||
2753 | err: | |
b29c7690 | 2754 | while (--i >= 0) |
414c70cb LG |
2755 | regulator_put(consumers[i].consumer); |
2756 | ||
2757 | return ret; | |
2758 | } | |
2759 | EXPORT_SYMBOL_GPL(regulator_bulk_get); | |
2760 | ||
e6e74030 MB |
2761 | /** |
2762 | * devm_regulator_bulk_get - managed get multiple regulator consumers | |
2763 | * | |
2764 | * @dev: Device to supply | |
2765 | * @num_consumers: Number of consumers to register | |
2766 | * @consumers: Configuration of consumers; clients are stored here. | |
2767 | * | |
2768 | * @return 0 on success, an errno on failure. | |
2769 | * | |
2770 | * This helper function allows drivers to get several regulator | |
2771 | * consumers in one operation with management, the regulators will | |
2772 | * automatically be freed when the device is unbound. If any of the | |
2773 | * regulators cannot be acquired then any regulators that were | |
2774 | * allocated will be freed before returning to the caller. | |
2775 | */ | |
2776 | int devm_regulator_bulk_get(struct device *dev, int num_consumers, | |
2777 | struct regulator_bulk_data *consumers) | |
2778 | { | |
2779 | int i; | |
2780 | int ret; | |
2781 | ||
2782 | for (i = 0; i < num_consumers; i++) | |
2783 | consumers[i].consumer = NULL; | |
2784 | ||
2785 | for (i = 0; i < num_consumers; i++) { | |
2786 | consumers[i].consumer = devm_regulator_get(dev, | |
2787 | consumers[i].supply); | |
2788 | if (IS_ERR(consumers[i].consumer)) { | |
2789 | ret = PTR_ERR(consumers[i].consumer); | |
2790 | dev_err(dev, "Failed to get supply '%s': %d\n", | |
2791 | consumers[i].supply, ret); | |
2792 | consumers[i].consumer = NULL; | |
2793 | goto err; | |
2794 | } | |
2795 | } | |
2796 | ||
2797 | return 0; | |
2798 | ||
2799 | err: | |
2800 | for (i = 0; i < num_consumers && consumers[i].consumer; i++) | |
2801 | devm_regulator_put(consumers[i].consumer); | |
2802 | ||
2803 | return ret; | |
2804 | } | |
2805 | EXPORT_SYMBOL_GPL(devm_regulator_bulk_get); | |
2806 | ||
f21e0e81 MB |
2807 | static void regulator_bulk_enable_async(void *data, async_cookie_t cookie) |
2808 | { | |
2809 | struct regulator_bulk_data *bulk = data; | |
2810 | ||
2811 | bulk->ret = regulator_enable(bulk->consumer); | |
2812 | } | |
2813 | ||
414c70cb LG |
2814 | /** |
2815 | * regulator_bulk_enable - enable multiple regulator consumers | |
2816 | * | |
2817 | * @num_consumers: Number of consumers | |
2818 | * @consumers: Consumer data; clients are stored here. | |
2819 | * @return 0 on success, an errno on failure | |
2820 | * | |
2821 | * This convenience API allows consumers to enable multiple regulator | |
2822 | * clients in a single API call. If any consumers cannot be enabled | |
2823 | * then any others that were enabled will be disabled again prior to | |
2824 | * return. | |
2825 | */ | |
2826 | int regulator_bulk_enable(int num_consumers, | |
2827 | struct regulator_bulk_data *consumers) | |
2828 | { | |
2955b47d | 2829 | ASYNC_DOMAIN_EXCLUSIVE(async_domain); |
414c70cb | 2830 | int i; |
f21e0e81 | 2831 | int ret = 0; |
414c70cb | 2832 | |
6492bc1b MB |
2833 | for (i = 0; i < num_consumers; i++) { |
2834 | if (consumers[i].consumer->always_on) | |
2835 | consumers[i].ret = 0; | |
2836 | else | |
2837 | async_schedule_domain(regulator_bulk_enable_async, | |
2838 | &consumers[i], &async_domain); | |
2839 | } | |
f21e0e81 MB |
2840 | |
2841 | async_synchronize_full_domain(&async_domain); | |
2842 | ||
2843 | /* If any consumer failed we need to unwind any that succeeded */ | |
414c70cb | 2844 | for (i = 0; i < num_consumers; i++) { |
f21e0e81 MB |
2845 | if (consumers[i].ret != 0) { |
2846 | ret = consumers[i].ret; | |
414c70cb | 2847 | goto err; |
f21e0e81 | 2848 | } |
414c70cb LG |
2849 | } |
2850 | ||
2851 | return 0; | |
2852 | ||
2853 | err: | |
b29c7690 AL |
2854 | pr_err("Failed to enable %s: %d\n", consumers[i].supply, ret); |
2855 | while (--i >= 0) | |
2856 | regulator_disable(consumers[i].consumer); | |
414c70cb LG |
2857 | |
2858 | return ret; | |
2859 | } | |
2860 | EXPORT_SYMBOL_GPL(regulator_bulk_enable); | |
2861 | ||
2862 | /** | |
2863 | * regulator_bulk_disable - disable multiple regulator consumers | |
2864 | * | |
2865 | * @num_consumers: Number of consumers | |
2866 | * @consumers: Consumer data; clients are stored here. | |
2867 | * @return 0 on success, an errno on failure | |
2868 | * | |
2869 | * This convenience API allows consumers to disable multiple regulator | |
49e22632 SN |
2870 | * clients in a single API call. If any consumers cannot be disabled |
2871 | * then any others that were disabled will be enabled again prior to | |
414c70cb LG |
2872 | * return. |
2873 | */ | |
2874 | int regulator_bulk_disable(int num_consumers, | |
2875 | struct regulator_bulk_data *consumers) | |
2876 | { | |
2877 | int i; | |
01e86f49 | 2878 | int ret, r; |
414c70cb | 2879 | |
49e22632 | 2880 | for (i = num_consumers - 1; i >= 0; --i) { |
414c70cb LG |
2881 | ret = regulator_disable(consumers[i].consumer); |
2882 | if (ret != 0) | |
2883 | goto err; | |
2884 | } | |
2885 | ||
2886 | return 0; | |
2887 | ||
2888 | err: | |
5da84fd9 | 2889 | pr_err("Failed to disable %s: %d\n", consumers[i].supply, ret); |
01e86f49 MB |
2890 | for (++i; i < num_consumers; ++i) { |
2891 | r = regulator_enable(consumers[i].consumer); | |
2892 | if (r != 0) | |
2893 | pr_err("Failed to reename %s: %d\n", | |
2894 | consumers[i].supply, r); | |
2895 | } | |
414c70cb LG |
2896 | |
2897 | return ret; | |
2898 | } | |
2899 | EXPORT_SYMBOL_GPL(regulator_bulk_disable); | |
2900 | ||
e1de2f42 DK |
2901 | /** |
2902 | * regulator_bulk_force_disable - force disable multiple regulator consumers | |
2903 | * | |
2904 | * @num_consumers: Number of consumers | |
2905 | * @consumers: Consumer data; clients are stored here. | |
2906 | * @return 0 on success, an errno on failure | |
2907 | * | |
2908 | * This convenience API allows consumers to forcibly disable multiple regulator | |
2909 | * clients in a single API call. | |
2910 | * NOTE: This should be used for situations when device damage will | |
2911 | * likely occur if the regulators are not disabled (e.g. over temp). | |
2912 | * Although regulator_force_disable function call for some consumers can | |
2913 | * return error numbers, the function is called for all consumers. | |
2914 | */ | |
2915 | int regulator_bulk_force_disable(int num_consumers, | |
2916 | struct regulator_bulk_data *consumers) | |
2917 | { | |
2918 | int i; | |
2919 | int ret; | |
2920 | ||
2921 | for (i = 0; i < num_consumers; i++) | |
2922 | consumers[i].ret = | |
2923 | regulator_force_disable(consumers[i].consumer); | |
2924 | ||
2925 | for (i = 0; i < num_consumers; i++) { | |
2926 | if (consumers[i].ret != 0) { | |
2927 | ret = consumers[i].ret; | |
2928 | goto out; | |
2929 | } | |
2930 | } | |
2931 | ||
2932 | return 0; | |
2933 | out: | |
2934 | return ret; | |
2935 | } | |
2936 | EXPORT_SYMBOL_GPL(regulator_bulk_force_disable); | |
2937 | ||
414c70cb LG |
2938 | /** |
2939 | * regulator_bulk_free - free multiple regulator consumers | |
2940 | * | |
2941 | * @num_consumers: Number of consumers | |
2942 | * @consumers: Consumer data; clients are stored here. | |
2943 | * | |
2944 | * This convenience API allows consumers to free multiple regulator | |
2945 | * clients in a single API call. | |
2946 | */ | |
2947 | void regulator_bulk_free(int num_consumers, | |
2948 | struct regulator_bulk_data *consumers) | |
2949 | { | |
2950 | int i; | |
2951 | ||
2952 | for (i = 0; i < num_consumers; i++) { | |
2953 | regulator_put(consumers[i].consumer); | |
2954 | consumers[i].consumer = NULL; | |
2955 | } | |
2956 | } | |
2957 | EXPORT_SYMBOL_GPL(regulator_bulk_free); | |
2958 | ||
2959 | /** | |
2960 | * regulator_notifier_call_chain - call regulator event notifier | |
69279fb9 | 2961 | * @rdev: regulator source |
414c70cb | 2962 | * @event: notifier block |
69279fb9 | 2963 | * @data: callback-specific data. |
414c70cb LG |
2964 | * |
2965 | * Called by regulator drivers to notify clients a regulator event has | |
2966 | * occurred. We also notify regulator clients downstream. | |
b136fb44 | 2967 | * Note lock must be held by caller. |
414c70cb LG |
2968 | */ |
2969 | int regulator_notifier_call_chain(struct regulator_dev *rdev, | |
2970 | unsigned long event, void *data) | |
2971 | { | |
2972 | _notifier_call_chain(rdev, event, data); | |
2973 | return NOTIFY_DONE; | |
2974 | ||
2975 | } | |
2976 | EXPORT_SYMBOL_GPL(regulator_notifier_call_chain); | |
2977 | ||
be721979 MB |
2978 | /** |
2979 | * regulator_mode_to_status - convert a regulator mode into a status | |
2980 | * | |
2981 | * @mode: Mode to convert | |
2982 | * | |
2983 | * Convert a regulator mode into a status. | |
2984 | */ | |
2985 | int regulator_mode_to_status(unsigned int mode) | |
2986 | { | |
2987 | switch (mode) { | |
2988 | case REGULATOR_MODE_FAST: | |
2989 | return REGULATOR_STATUS_FAST; | |
2990 | case REGULATOR_MODE_NORMAL: | |
2991 | return REGULATOR_STATUS_NORMAL; | |
2992 | case REGULATOR_MODE_IDLE: | |
2993 | return REGULATOR_STATUS_IDLE; | |
03ffcf3d | 2994 | case REGULATOR_MODE_STANDBY: |
be721979 MB |
2995 | return REGULATOR_STATUS_STANDBY; |
2996 | default: | |
1beaf762 | 2997 | return REGULATOR_STATUS_UNDEFINED; |
be721979 MB |
2998 | } |
2999 | } | |
3000 | EXPORT_SYMBOL_GPL(regulator_mode_to_status); | |
3001 | ||
7ad68e2f DB |
3002 | /* |
3003 | * To avoid cluttering sysfs (and memory) with useless state, only | |
3004 | * create attributes that can be meaningfully displayed. | |
3005 | */ | |
3006 | static int add_regulator_attributes(struct regulator_dev *rdev) | |
3007 | { | |
3008 | struct device *dev = &rdev->dev; | |
3009 | struct regulator_ops *ops = rdev->desc->ops; | |
3010 | int status = 0; | |
3011 | ||
3012 | /* some attributes need specific methods to be displayed */ | |
4c78899b MB |
3013 | if ((ops->get_voltage && ops->get_voltage(rdev) >= 0) || |
3014 | (ops->get_voltage_sel && ops->get_voltage_sel(rdev) >= 0)) { | |
7ad68e2f DB |
3015 | status = device_create_file(dev, &dev_attr_microvolts); |
3016 | if (status < 0) | |
3017 | return status; | |
3018 | } | |
3019 | if (ops->get_current_limit) { | |
3020 | status = device_create_file(dev, &dev_attr_microamps); | |
3021 | if (status < 0) | |
3022 | return status; | |
3023 | } | |
3024 | if (ops->get_mode) { | |
3025 | status = device_create_file(dev, &dev_attr_opmode); | |
3026 | if (status < 0) | |
3027 | return status; | |
3028 | } | |
3029 | if (ops->is_enabled) { | |
3030 | status = device_create_file(dev, &dev_attr_state); | |
3031 | if (status < 0) | |
3032 | return status; | |
3033 | } | |
853116a1 DB |
3034 | if (ops->get_status) { |
3035 | status = device_create_file(dev, &dev_attr_status); | |
3036 | if (status < 0) | |
3037 | return status; | |
3038 | } | |
7ad68e2f DB |
3039 | |
3040 | /* some attributes are type-specific */ | |
3041 | if (rdev->desc->type == REGULATOR_CURRENT) { | |
3042 | status = device_create_file(dev, &dev_attr_requested_microamps); | |
3043 | if (status < 0) | |
3044 | return status; | |
3045 | } | |
3046 | ||
3047 | /* all the other attributes exist to support constraints; | |
3048 | * don't show them if there are no constraints, or if the | |
3049 | * relevant supporting methods are missing. | |
3050 | */ | |
3051 | if (!rdev->constraints) | |
3052 | return status; | |
3053 | ||
3054 | /* constraints need specific supporting methods */ | |
e8eef82b | 3055 | if (ops->set_voltage || ops->set_voltage_sel) { |
7ad68e2f DB |
3056 | status = device_create_file(dev, &dev_attr_min_microvolts); |
3057 | if (status < 0) | |
3058 | return status; | |
3059 | status = device_create_file(dev, &dev_attr_max_microvolts); | |
3060 | if (status < 0) | |
3061 | return status; | |
3062 | } | |
3063 | if (ops->set_current_limit) { | |
3064 | status = device_create_file(dev, &dev_attr_min_microamps); | |
3065 | if (status < 0) | |
3066 | return status; | |
3067 | status = device_create_file(dev, &dev_attr_max_microamps); | |
3068 | if (status < 0) | |
3069 | return status; | |
3070 | } | |
3071 | ||
7ad68e2f DB |
3072 | status = device_create_file(dev, &dev_attr_suspend_standby_state); |
3073 | if (status < 0) | |
3074 | return status; | |
3075 | status = device_create_file(dev, &dev_attr_suspend_mem_state); | |
3076 | if (status < 0) | |
3077 | return status; | |
3078 | status = device_create_file(dev, &dev_attr_suspend_disk_state); | |
3079 | if (status < 0) | |
3080 | return status; | |
3081 | ||
3082 | if (ops->set_suspend_voltage) { | |
3083 | status = device_create_file(dev, | |
3084 | &dev_attr_suspend_standby_microvolts); | |
3085 | if (status < 0) | |
3086 | return status; | |
3087 | status = device_create_file(dev, | |
3088 | &dev_attr_suspend_mem_microvolts); | |
3089 | if (status < 0) | |
3090 | return status; | |
3091 | status = device_create_file(dev, | |
3092 | &dev_attr_suspend_disk_microvolts); | |
3093 | if (status < 0) | |
3094 | return status; | |
3095 | } | |
3096 | ||
3097 | if (ops->set_suspend_mode) { | |
3098 | status = device_create_file(dev, | |
3099 | &dev_attr_suspend_standby_mode); | |
3100 | if (status < 0) | |
3101 | return status; | |
3102 | status = device_create_file(dev, | |
3103 | &dev_attr_suspend_mem_mode); | |
3104 | if (status < 0) | |
3105 | return status; | |
3106 | status = device_create_file(dev, | |
3107 | &dev_attr_suspend_disk_mode); | |
3108 | if (status < 0) | |
3109 | return status; | |
3110 | } | |
3111 | ||
3112 | return status; | |
3113 | } | |
3114 | ||
1130e5b3 MB |
3115 | static void rdev_init_debugfs(struct regulator_dev *rdev) |
3116 | { | |
1130e5b3 | 3117 | rdev->debugfs = debugfs_create_dir(rdev_get_name(rdev), debugfs_root); |
24751434 | 3118 | if (!rdev->debugfs) { |
1130e5b3 | 3119 | rdev_warn(rdev, "Failed to create debugfs directory\n"); |
1130e5b3 MB |
3120 | return; |
3121 | } | |
3122 | ||
3123 | debugfs_create_u32("use_count", 0444, rdev->debugfs, | |
3124 | &rdev->use_count); | |
3125 | debugfs_create_u32("open_count", 0444, rdev->debugfs, | |
3126 | &rdev->open_count); | |
1130e5b3 MB |
3127 | } |
3128 | ||
414c70cb LG |
3129 | /** |
3130 | * regulator_register - register regulator | |
69279fb9 | 3131 | * @regulator_desc: regulator to register |
c172708d | 3132 | * @config: runtime configuration for regulator |
414c70cb LG |
3133 | * |
3134 | * Called by regulator drivers to register a regulator. | |
3135 | * Returns 0 on success. | |
3136 | */ | |
65f26846 MB |
3137 | struct regulator_dev * |
3138 | regulator_register(const struct regulator_desc *regulator_desc, | |
c172708d | 3139 | const struct regulator_config *config) |
414c70cb | 3140 | { |
9a8f5e07 | 3141 | const struct regulation_constraints *constraints = NULL; |
c172708d | 3142 | const struct regulator_init_data *init_data; |
414c70cb LG |
3143 | static atomic_t regulator_no = ATOMIC_INIT(0); |
3144 | struct regulator_dev *rdev; | |
32c8fad4 | 3145 | struct device *dev; |
a5766f11 | 3146 | int ret, i; |
69511a45 | 3147 | const char *supply = NULL; |
414c70cb | 3148 | |
c172708d | 3149 | if (regulator_desc == NULL || config == NULL) |
414c70cb LG |
3150 | return ERR_PTR(-EINVAL); |
3151 | ||
32c8fad4 | 3152 | dev = config->dev; |
dcf70112 | 3153 | WARN_ON(!dev); |
32c8fad4 | 3154 | |
414c70cb LG |
3155 | if (regulator_desc->name == NULL || regulator_desc->ops == NULL) |
3156 | return ERR_PTR(-EINVAL); | |
3157 | ||
cd78dfc6 DL |
3158 | if (regulator_desc->type != REGULATOR_VOLTAGE && |
3159 | regulator_desc->type != REGULATOR_CURRENT) | |
414c70cb LG |
3160 | return ERR_PTR(-EINVAL); |
3161 | ||
476c2d83 MB |
3162 | /* Only one of each should be implemented */ |
3163 | WARN_ON(regulator_desc->ops->get_voltage && | |
3164 | regulator_desc->ops->get_voltage_sel); | |
e8eef82b MB |
3165 | WARN_ON(regulator_desc->ops->set_voltage && |
3166 | regulator_desc->ops->set_voltage_sel); | |
476c2d83 MB |
3167 | |
3168 | /* If we're using selectors we must implement list_voltage. */ | |
3169 | if (regulator_desc->ops->get_voltage_sel && | |
3170 | !regulator_desc->ops->list_voltage) { | |
3171 | return ERR_PTR(-EINVAL); | |
3172 | } | |
e8eef82b MB |
3173 | if (regulator_desc->ops->set_voltage_sel && |
3174 | !regulator_desc->ops->list_voltage) { | |
3175 | return ERR_PTR(-EINVAL); | |
3176 | } | |
476c2d83 | 3177 | |
c172708d MB |
3178 | init_data = config->init_data; |
3179 | ||
414c70cb LG |
3180 | rdev = kzalloc(sizeof(struct regulator_dev), GFP_KERNEL); |
3181 | if (rdev == NULL) | |
3182 | return ERR_PTR(-ENOMEM); | |
3183 | ||
3184 | mutex_lock(®ulator_list_mutex); | |
3185 | ||
3186 | mutex_init(&rdev->mutex); | |
c172708d | 3187 | rdev->reg_data = config->driver_data; |
414c70cb LG |
3188 | rdev->owner = regulator_desc->owner; |
3189 | rdev->desc = regulator_desc; | |
3a4b0a07 MB |
3190 | if (config->regmap) |
3191 | rdev->regmap = config->regmap; | |
3192 | else | |
3193 | rdev->regmap = dev_get_regmap(dev, NULL); | |
414c70cb | 3194 | INIT_LIST_HEAD(&rdev->consumer_list); |
414c70cb | 3195 | INIT_LIST_HEAD(&rdev->list); |
414c70cb | 3196 | BLOCKING_INIT_NOTIFIER_HEAD(&rdev->notifier); |
da07ecd9 | 3197 | INIT_DELAYED_WORK(&rdev->disable_work, regulator_disable_work); |
414c70cb | 3198 | |
a5766f11 | 3199 | /* preform any regulator specific init */ |
9a8f5e07 | 3200 | if (init_data && init_data->regulator_init) { |
a5766f11 | 3201 | ret = init_data->regulator_init(rdev->reg_data); |
4fca9545 DB |
3202 | if (ret < 0) |
3203 | goto clean; | |
a5766f11 LG |
3204 | } |
3205 | ||
a5766f11 | 3206 | /* register with sysfs */ |
414c70cb | 3207 | rdev->dev.class = ®ulator_class; |
c172708d | 3208 | rdev->dev.of_node = config->of_node; |
a5766f11 | 3209 | rdev->dev.parent = dev; |
812460a9 KS |
3210 | dev_set_name(&rdev->dev, "regulator.%d", |
3211 | atomic_inc_return(®ulator_no) - 1); | |
a5766f11 | 3212 | ret = device_register(&rdev->dev); |
ad7725cb VK |
3213 | if (ret != 0) { |
3214 | put_device(&rdev->dev); | |
4fca9545 | 3215 | goto clean; |
ad7725cb | 3216 | } |
a5766f11 LG |
3217 | |
3218 | dev_set_drvdata(&rdev->dev, rdev); | |
3219 | ||
65f73508 MB |
3220 | if (config->ena_gpio) { |
3221 | ret = gpio_request_one(config->ena_gpio, | |
3222 | GPIOF_DIR_OUT | config->ena_gpio_flags, | |
3223 | rdev_get_name(rdev)); | |
3224 | if (ret != 0) { | |
3225 | rdev_err(rdev, "Failed to request enable GPIO%d: %d\n", | |
3226 | config->ena_gpio, ret); | |
3227 | goto clean; | |
3228 | } | |
3229 | ||
3230 | rdev->ena_gpio = config->ena_gpio; | |
3231 | rdev->ena_gpio_invert = config->ena_gpio_invert; | |
3232 | ||
3233 | if (config->ena_gpio_flags & GPIOF_OUT_INIT_HIGH) | |
3234 | rdev->ena_gpio_state = 1; | |
3235 | ||
3236 | if (rdev->ena_gpio_invert) | |
3237 | rdev->ena_gpio_state = !rdev->ena_gpio_state; | |
3238 | } | |
3239 | ||
74f544c1 | 3240 | /* set regulator constraints */ |
9a8f5e07 MB |
3241 | if (init_data) |
3242 | constraints = &init_data->constraints; | |
3243 | ||
3244 | ret = set_machine_constraints(rdev, constraints); | |
74f544c1 MR |
3245 | if (ret < 0) |
3246 | goto scrub; | |
3247 | ||
7ad68e2f DB |
3248 | /* add attributes supported by this regulator */ |
3249 | ret = add_regulator_attributes(rdev); | |
3250 | if (ret < 0) | |
3251 | goto scrub; | |
3252 | ||
9a8f5e07 | 3253 | if (init_data && init_data->supply_regulator) |
69511a45 RN |
3254 | supply = init_data->supply_regulator; |
3255 | else if (regulator_desc->supply_name) | |
3256 | supply = regulator_desc->supply_name; | |
3257 | ||
3258 | if (supply) { | |
0178f3e2 | 3259 | struct regulator_dev *r; |
0178f3e2 | 3260 | |
6d191a5f | 3261 | r = regulator_dev_lookup(dev, supply, &ret); |
0178f3e2 | 3262 | |
69511a45 RN |
3263 | if (!r) { |
3264 | dev_err(dev, "Failed to find supply %s\n", supply); | |
04bf3011 | 3265 | ret = -EPROBE_DEFER; |
0178f3e2 MB |
3266 | goto scrub; |
3267 | } | |
3268 | ||
3269 | ret = set_supply(rdev, r); | |
3270 | if (ret < 0) | |
3271 | goto scrub; | |
b2296bd4 LD |
3272 | |
3273 | /* Enable supply if rail is enabled */ | |
b1a86831 | 3274 | if (_regulator_is_enabled(rdev)) { |
b2296bd4 LD |
3275 | ret = regulator_enable(rdev->supply); |
3276 | if (ret < 0) | |
3277 | goto scrub; | |
3278 | } | |
0178f3e2 MB |
3279 | } |
3280 | ||
a5766f11 | 3281 | /* add consumers devices */ |
9a8f5e07 MB |
3282 | if (init_data) { |
3283 | for (i = 0; i < init_data->num_consumer_supplies; i++) { | |
3284 | ret = set_consumer_device_supply(rdev, | |
9a8f5e07 | 3285 | init_data->consumer_supplies[i].dev_name, |
23c2f041 | 3286 | init_data->consumer_supplies[i].supply); |
9a8f5e07 MB |
3287 | if (ret < 0) { |
3288 | dev_err(dev, "Failed to set supply %s\n", | |
3289 | init_data->consumer_supplies[i].supply); | |
3290 | goto unset_supplies; | |
3291 | } | |
23c2f041 | 3292 | } |
414c70cb | 3293 | } |
a5766f11 LG |
3294 | |
3295 | list_add(&rdev->list, ®ulator_list); | |
1130e5b3 MB |
3296 | |
3297 | rdev_init_debugfs(rdev); | |
a5766f11 | 3298 | out: |
414c70cb LG |
3299 | mutex_unlock(®ulator_list_mutex); |
3300 | return rdev; | |
4fca9545 | 3301 | |
d4033b54 JN |
3302 | unset_supplies: |
3303 | unset_regulator_supplies(rdev); | |
3304 | ||
4fca9545 | 3305 | scrub: |
e81dba85 MB |
3306 | if (rdev->supply) |
3307 | regulator_put(rdev->supply); | |
65f73508 MB |
3308 | if (rdev->ena_gpio) |
3309 | gpio_free(rdev->ena_gpio); | |
1a6958e7 | 3310 | kfree(rdev->constraints); |
4fca9545 | 3311 | device_unregister(&rdev->dev); |
53032daf PW |
3312 | /* device core frees rdev */ |
3313 | rdev = ERR_PTR(ret); | |
3314 | goto out; | |
3315 | ||
4fca9545 DB |
3316 | clean: |
3317 | kfree(rdev); | |
3318 | rdev = ERR_PTR(ret); | |
3319 | goto out; | |
414c70cb LG |
3320 | } |
3321 | EXPORT_SYMBOL_GPL(regulator_register); | |
3322 | ||
3323 | /** | |
3324 | * regulator_unregister - unregister regulator | |
69279fb9 | 3325 | * @rdev: regulator to unregister |
414c70cb LG |
3326 | * |
3327 | * Called by regulator drivers to unregister a regulator. | |
3328 | */ | |
3329 | void regulator_unregister(struct regulator_dev *rdev) | |
3330 | { | |
3331 | if (rdev == NULL) | |
3332 | return; | |
3333 | ||
e032b376 MB |
3334 | if (rdev->supply) |
3335 | regulator_put(rdev->supply); | |
414c70cb | 3336 | mutex_lock(®ulator_list_mutex); |
1130e5b3 | 3337 | debugfs_remove_recursive(rdev->debugfs); |
da07ecd9 | 3338 | flush_work_sync(&rdev->disable_work.work); |
6bf87d17 | 3339 | WARN_ON(rdev->open_count); |
0f1d747b | 3340 | unset_regulator_supplies(rdev); |
414c70cb | 3341 | list_del(&rdev->list); |
f8c12fe3 | 3342 | kfree(rdev->constraints); |
65f73508 MB |
3343 | if (rdev->ena_gpio) |
3344 | gpio_free(rdev->ena_gpio); | |
58fb5cf5 | 3345 | device_unregister(&rdev->dev); |
414c70cb LG |
3346 | mutex_unlock(®ulator_list_mutex); |
3347 | } | |
3348 | EXPORT_SYMBOL_GPL(regulator_unregister); | |
3349 | ||
414c70cb | 3350 | /** |
cf7bbcdf | 3351 | * regulator_suspend_prepare - prepare regulators for system wide suspend |
414c70cb LG |
3352 | * @state: system suspend state |
3353 | * | |
3354 | * Configure each regulator with it's suspend operating parameters for state. | |
3355 | * This will usually be called by machine suspend code prior to supending. | |
3356 | */ | |
3357 | int regulator_suspend_prepare(suspend_state_t state) | |
3358 | { | |
3359 | struct regulator_dev *rdev; | |
3360 | int ret = 0; | |
3361 | ||
3362 | /* ON is handled by regulator active state */ | |
3363 | if (state == PM_SUSPEND_ON) | |
3364 | return -EINVAL; | |
3365 | ||
3366 | mutex_lock(®ulator_list_mutex); | |
3367 | list_for_each_entry(rdev, ®ulator_list, list) { | |
3368 | ||
3369 | mutex_lock(&rdev->mutex); | |
3370 | ret = suspend_prepare(rdev, state); | |
3371 | mutex_unlock(&rdev->mutex); | |
3372 | ||
3373 | if (ret < 0) { | |
5da84fd9 | 3374 | rdev_err(rdev, "failed to prepare\n"); |
414c70cb LG |
3375 | goto out; |
3376 | } | |
3377 | } | |
3378 | out: | |
3379 | mutex_unlock(®ulator_list_mutex); | |
3380 | return ret; | |
3381 | } | |
3382 | EXPORT_SYMBOL_GPL(regulator_suspend_prepare); | |
3383 | ||
7a32b589 MH |
3384 | /** |
3385 | * regulator_suspend_finish - resume regulators from system wide suspend | |
3386 | * | |
3387 | * Turn on regulators that might be turned off by regulator_suspend_prepare | |
3388 | * and that should be turned on according to the regulators properties. | |
3389 | */ | |
3390 | int regulator_suspend_finish(void) | |
3391 | { | |
3392 | struct regulator_dev *rdev; | |
3393 | int ret = 0, error; | |
3394 | ||
3395 | mutex_lock(®ulator_list_mutex); | |
3396 | list_for_each_entry(rdev, ®ulator_list, list) { | |
3397 | struct regulator_ops *ops = rdev->desc->ops; | |
3398 | ||
3399 | mutex_lock(&rdev->mutex); | |
3400 | if ((rdev->use_count > 0 || rdev->constraints->always_on) && | |
3401 | ops->enable) { | |
3402 | error = ops->enable(rdev); | |
3403 | if (error) | |
3404 | ret = error; | |
3405 | } else { | |
3406 | if (!has_full_constraints) | |
3407 | goto unlock; | |
3408 | if (!ops->disable) | |
3409 | goto unlock; | |
b1a86831 | 3410 | if (!_regulator_is_enabled(rdev)) |
7a32b589 MH |
3411 | goto unlock; |
3412 | ||
3413 | error = ops->disable(rdev); | |
3414 | if (error) | |
3415 | ret = error; | |
3416 | } | |
3417 | unlock: | |
3418 | mutex_unlock(&rdev->mutex); | |
3419 | } | |
3420 | mutex_unlock(®ulator_list_mutex); | |
3421 | return ret; | |
3422 | } | |
3423 | EXPORT_SYMBOL_GPL(regulator_suspend_finish); | |
3424 | ||
ca725561 MB |
3425 | /** |
3426 | * regulator_has_full_constraints - the system has fully specified constraints | |
3427 | * | |
3428 | * Calling this function will cause the regulator API to disable all | |
3429 | * regulators which have a zero use count and don't have an always_on | |
3430 | * constraint in a late_initcall. | |
3431 | * | |
3432 | * The intention is that this will become the default behaviour in a | |
3433 | * future kernel release so users are encouraged to use this facility | |
3434 | * now. | |
3435 | */ | |
3436 | void regulator_has_full_constraints(void) | |
3437 | { | |
3438 | has_full_constraints = 1; | |
3439 | } | |
3440 | EXPORT_SYMBOL_GPL(regulator_has_full_constraints); | |
3441 | ||
688fe99a MB |
3442 | /** |
3443 | * regulator_use_dummy_regulator - Provide a dummy regulator when none is found | |
3444 | * | |
3445 | * Calling this function will cause the regulator API to provide a | |
3446 | * dummy regulator to consumers if no physical regulator is found, | |
3447 | * allowing most consumers to proceed as though a regulator were | |
3448 | * configured. This allows systems such as those with software | |
3449 | * controllable regulators for the CPU core only to be brought up more | |
3450 | * readily. | |
3451 | */ | |
3452 | void regulator_use_dummy_regulator(void) | |
3453 | { | |
3454 | board_wants_dummy_regulator = true; | |
3455 | } | |
3456 | EXPORT_SYMBOL_GPL(regulator_use_dummy_regulator); | |
3457 | ||
414c70cb LG |
3458 | /** |
3459 | * rdev_get_drvdata - get rdev regulator driver data | |
69279fb9 | 3460 | * @rdev: regulator |
414c70cb LG |
3461 | * |
3462 | * Get rdev regulator driver private data. This call can be used in the | |
3463 | * regulator driver context. | |
3464 | */ | |
3465 | void *rdev_get_drvdata(struct regulator_dev *rdev) | |
3466 | { | |
3467 | return rdev->reg_data; | |
3468 | } | |
3469 | EXPORT_SYMBOL_GPL(rdev_get_drvdata); | |
3470 | ||
3471 | /** | |
3472 | * regulator_get_drvdata - get regulator driver data | |
3473 | * @regulator: regulator | |
3474 | * | |
3475 | * Get regulator driver private data. This call can be used in the consumer | |
3476 | * driver context when non API regulator specific functions need to be called. | |
3477 | */ | |
3478 | void *regulator_get_drvdata(struct regulator *regulator) | |
3479 | { | |
3480 | return regulator->rdev->reg_data; | |
3481 | } | |
3482 | EXPORT_SYMBOL_GPL(regulator_get_drvdata); | |
3483 | ||
3484 | /** | |
3485 | * regulator_set_drvdata - set regulator driver data | |
3486 | * @regulator: regulator | |
3487 | * @data: data | |
3488 | */ | |
3489 | void regulator_set_drvdata(struct regulator *regulator, void *data) | |
3490 | { | |
3491 | regulator->rdev->reg_data = data; | |
3492 | } | |
3493 | EXPORT_SYMBOL_GPL(regulator_set_drvdata); | |
3494 | ||
3495 | /** | |
3496 | * regulator_get_id - get regulator ID | |
69279fb9 | 3497 | * @rdev: regulator |
414c70cb LG |
3498 | */ |
3499 | int rdev_get_id(struct regulator_dev *rdev) | |
3500 | { | |
3501 | return rdev->desc->id; | |
3502 | } | |
3503 | EXPORT_SYMBOL_GPL(rdev_get_id); | |
3504 | ||
a5766f11 LG |
3505 | struct device *rdev_get_dev(struct regulator_dev *rdev) |
3506 | { | |
3507 | return &rdev->dev; | |
3508 | } | |
3509 | EXPORT_SYMBOL_GPL(rdev_get_dev); | |
3510 | ||
3511 | void *regulator_get_init_drvdata(struct regulator_init_data *reg_init_data) | |
3512 | { | |
3513 | return reg_init_data->driver_data; | |
3514 | } | |
3515 | EXPORT_SYMBOL_GPL(regulator_get_init_drvdata); | |
3516 | ||
ba55a974 MB |
3517 | #ifdef CONFIG_DEBUG_FS |
3518 | static ssize_t supply_map_read_file(struct file *file, char __user *user_buf, | |
3519 | size_t count, loff_t *ppos) | |
3520 | { | |
3521 | char *buf = kmalloc(PAGE_SIZE, GFP_KERNEL); | |
3522 | ssize_t len, ret = 0; | |
3523 | struct regulator_map *map; | |
3524 | ||
3525 | if (!buf) | |
3526 | return -ENOMEM; | |
3527 | ||
3528 | list_for_each_entry(map, ®ulator_map_list, list) { | |
3529 | len = snprintf(buf + ret, PAGE_SIZE - ret, | |
3530 | "%s -> %s.%s\n", | |
3531 | rdev_get_name(map->regulator), map->dev_name, | |
3532 | map->supply); | |
3533 | if (len >= 0) | |
3534 | ret += len; | |
3535 | if (ret > PAGE_SIZE) { | |
3536 | ret = PAGE_SIZE; | |
3537 | break; | |
3538 | } | |
3539 | } | |
3540 | ||
3541 | ret = simple_read_from_buffer(user_buf, count, ppos, buf, ret); | |
3542 | ||
3543 | kfree(buf); | |
3544 | ||
3545 | return ret; | |
3546 | } | |
24751434 | 3547 | #endif |
ba55a974 MB |
3548 | |
3549 | static const struct file_operations supply_map_fops = { | |
24751434 | 3550 | #ifdef CONFIG_DEBUG_FS |
ba55a974 MB |
3551 | .read = supply_map_read_file, |
3552 | .llseek = default_llseek, | |
ba55a974 | 3553 | #endif |
24751434 | 3554 | }; |
ba55a974 | 3555 | |
414c70cb LG |
3556 | static int __init regulator_init(void) |
3557 | { | |
34abbd68 MB |
3558 | int ret; |
3559 | ||
34abbd68 MB |
3560 | ret = class_register(®ulator_class); |
3561 | ||
1130e5b3 | 3562 | debugfs_root = debugfs_create_dir("regulator", NULL); |
24751434 | 3563 | if (!debugfs_root) |
1130e5b3 | 3564 | pr_warn("regulator: Failed to create debugfs directory\n"); |
ba55a974 | 3565 | |
f4d562c6 MB |
3566 | debugfs_create_file("supply_map", 0444, debugfs_root, NULL, |
3567 | &supply_map_fops); | |
1130e5b3 | 3568 | |
34abbd68 MB |
3569 | regulator_dummy_init(); |
3570 | ||
3571 | return ret; | |
414c70cb LG |
3572 | } |
3573 | ||
3574 | /* init early to allow our consumers to complete system booting */ | |
3575 | core_initcall(regulator_init); | |
ca725561 MB |
3576 | |
3577 | static int __init regulator_init_complete(void) | |
3578 | { | |
3579 | struct regulator_dev *rdev; | |
3580 | struct regulator_ops *ops; | |
3581 | struct regulation_constraints *c; | |
3582 | int enabled, ret; | |
ca725561 | 3583 | |
86f5fcfc MB |
3584 | /* |
3585 | * Since DT doesn't provide an idiomatic mechanism for | |
3586 | * enabling full constraints and since it's much more natural | |
3587 | * with DT to provide them just assume that a DT enabled | |
3588 | * system has full constraints. | |
3589 | */ | |
3590 | if (of_have_populated_dt()) | |
3591 | has_full_constraints = true; | |
3592 | ||
ca725561 MB |
3593 | mutex_lock(®ulator_list_mutex); |
3594 | ||
3595 | /* If we have a full configuration then disable any regulators | |
3596 | * which are not in use or always_on. This will become the | |
3597 | * default behaviour in the future. | |
3598 | */ | |
3599 | list_for_each_entry(rdev, ®ulator_list, list) { | |
3600 | ops = rdev->desc->ops; | |
3601 | c = rdev->constraints; | |
3602 | ||
f25e0b4f | 3603 | if (!ops->disable || (c && c->always_on)) |
ca725561 MB |
3604 | continue; |
3605 | ||
3606 | mutex_lock(&rdev->mutex); | |
3607 | ||
3608 | if (rdev->use_count) | |
3609 | goto unlock; | |
3610 | ||
3611 | /* If we can't read the status assume it's on. */ | |
3612 | if (ops->is_enabled) | |
3613 | enabled = ops->is_enabled(rdev); | |
3614 | else | |
3615 | enabled = 1; | |
3616 | ||
3617 | if (!enabled) | |
3618 | goto unlock; | |
3619 | ||
3620 | if (has_full_constraints) { | |
3621 | /* We log since this may kill the system if it | |
3622 | * goes wrong. */ | |
5da84fd9 | 3623 | rdev_info(rdev, "disabling\n"); |
ca725561 MB |
3624 | ret = ops->disable(rdev); |
3625 | if (ret != 0) { | |
5da84fd9 | 3626 | rdev_err(rdev, "couldn't disable: %d\n", ret); |
ca725561 MB |
3627 | } |
3628 | } else { | |
3629 | /* The intention is that in future we will | |
3630 | * assume that full constraints are provided | |
3631 | * so warn even if we aren't going to do | |
3632 | * anything here. | |
3633 | */ | |
5da84fd9 | 3634 | rdev_warn(rdev, "incomplete constraints, leaving on\n"); |
ca725561 MB |
3635 | } |
3636 | ||
3637 | unlock: | |
3638 | mutex_unlock(&rdev->mutex); | |
3639 | } | |
3640 | ||
3641 | mutex_unlock(®ulator_list_mutex); | |
3642 | ||
3643 | return 0; | |
3644 | } | |
3645 | late_initcall(regulator_init_complete); |