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bd6ca2cf MH |
1 | /* |
2 | * max8997.c - Regulator driver for the Maxim 8997/8966 | |
3 | * | |
4 | * Copyright (C) 2011 Samsung Electronics | |
5 | * MyungJoo Ham <myungjoo.ham@smasung.com> | |
6 | * | |
7 | * This program is free software; you can redistribute it and/or modify | |
8 | * it under the terms of the GNU General Public License as published by | |
9 | * the Free Software Foundation; either version 2 of the License, or | |
10 | * (at your option) any later version. | |
11 | * | |
12 | * This program is distributed in the hope that it will be useful, | |
13 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
14 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
15 | * GNU General Public License for more details. | |
16 | * | |
17 | * You should have received a copy of the GNU General Public License | |
18 | * along with this program; if not, write to the Free Software | |
19 | * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA | |
20 | * | |
21 | * This driver is based on max8998.c | |
22 | */ | |
23 | ||
24 | #include <linux/bug.h> | |
bd6ca2cf MH |
25 | #include <linux/err.h> |
26 | #include <linux/gpio.h> | |
77b71b37 | 27 | #include <linux/of_gpio.h> |
bd6ca2cf | 28 | #include <linux/slab.h> |
65602c32 | 29 | #include <linux/module.h> |
bd6ca2cf MH |
30 | #include <linux/platform_device.h> |
31 | #include <linux/regulator/driver.h> | |
32 | #include <linux/regulator/machine.h> | |
33 | #include <linux/mfd/max8997.h> | |
34 | #include <linux/mfd/max8997-private.h> | |
77b71b37 | 35 | #include <linux/regulator/of_regulator.h> |
bd6ca2cf MH |
36 | |
37 | struct max8997_data { | |
38 | struct device *dev; | |
39 | struct max8997_dev *iodev; | |
40 | int num_regulators; | |
41 | struct regulator_dev **rdev; | |
42 | int ramp_delay; /* in mV/us */ | |
43 | ||
6e0414a5 MH |
44 | bool buck1_gpiodvs; |
45 | bool buck2_gpiodvs; | |
46 | bool buck5_gpiodvs; | |
bd6ca2cf MH |
47 | u8 buck1_vol[8]; |
48 | u8 buck2_vol[8]; | |
49 | u8 buck5_vol[8]; | |
6e0414a5 | 50 | int buck125_gpios[3]; |
bd6ca2cf | 51 | int buck125_gpioindex; |
6e0414a5 | 52 | bool ignore_gpiodvs_side_effect; |
bd6ca2cf MH |
53 | |
54 | u8 saved_states[MAX8997_REG_MAX]; | |
55 | }; | |
56 | ||
b79ca051 AL |
57 | static const unsigned int safeoutvolt[] = { |
58 | 4850000, | |
59 | 4900000, | |
60 | 4950000, | |
61 | 3300000, | |
62 | }; | |
63 | ||
bd6ca2cf MH |
64 | static inline void max8997_set_gpio(struct max8997_data *max8997) |
65 | { | |
bd6ca2cf MH |
66 | int set3 = (max8997->buck125_gpioindex) & 0x1; |
67 | int set2 = ((max8997->buck125_gpioindex) >> 1) & 0x1; | |
68 | int set1 = ((max8997->buck125_gpioindex) >> 2) & 0x1; | |
69 | ||
6e0414a5 MH |
70 | gpio_set_value(max8997->buck125_gpios[0], set1); |
71 | gpio_set_value(max8997->buck125_gpios[1], set2); | |
72 | gpio_set_value(max8997->buck125_gpios[2], set3); | |
bd6ca2cf MH |
73 | } |
74 | ||
75 | struct voltage_map_desc { | |
76 | int min; | |
77 | int max; | |
78 | int step; | |
bd6ca2cf MH |
79 | }; |
80 | ||
81 | /* Voltage maps in mV */ | |
82 | static const struct voltage_map_desc ldo_voltage_map_desc = { | |
0fa310cc | 83 | .min = 800, .max = 3950, .step = 50, |
bd6ca2cf MH |
84 | }; /* LDO1 ~ 18, 21 all */ |
85 | ||
86 | static const struct voltage_map_desc buck1245_voltage_map_desc = { | |
0fa310cc | 87 | .min = 650, .max = 2225, .step = 25, |
bd6ca2cf MH |
88 | }; /* Buck1, 2, 4, 5 */ |
89 | ||
90 | static const struct voltage_map_desc buck37_voltage_map_desc = { | |
0fa310cc | 91 | .min = 750, .max = 3900, .step = 50, |
bd6ca2cf MH |
92 | }; /* Buck3, 7 */ |
93 | ||
94 | /* current map in mA */ | |
95 | static const struct voltage_map_desc charger_current_map_desc = { | |
0fa310cc | 96 | .min = 200, .max = 950, .step = 50, |
bd6ca2cf MH |
97 | }; |
98 | ||
99 | static const struct voltage_map_desc topoff_current_map_desc = { | |
0fa310cc | 100 | .min = 50, .max = 200, .step = 10, |
bd6ca2cf MH |
101 | }; |
102 | ||
103 | static const struct voltage_map_desc *reg_voltage_map[] = { | |
104 | [MAX8997_LDO1] = &ldo_voltage_map_desc, | |
105 | [MAX8997_LDO2] = &ldo_voltage_map_desc, | |
106 | [MAX8997_LDO3] = &ldo_voltage_map_desc, | |
107 | [MAX8997_LDO4] = &ldo_voltage_map_desc, | |
108 | [MAX8997_LDO5] = &ldo_voltage_map_desc, | |
109 | [MAX8997_LDO6] = &ldo_voltage_map_desc, | |
110 | [MAX8997_LDO7] = &ldo_voltage_map_desc, | |
111 | [MAX8997_LDO8] = &ldo_voltage_map_desc, | |
112 | [MAX8997_LDO9] = &ldo_voltage_map_desc, | |
113 | [MAX8997_LDO10] = &ldo_voltage_map_desc, | |
114 | [MAX8997_LDO11] = &ldo_voltage_map_desc, | |
115 | [MAX8997_LDO12] = &ldo_voltage_map_desc, | |
116 | [MAX8997_LDO13] = &ldo_voltage_map_desc, | |
117 | [MAX8997_LDO14] = &ldo_voltage_map_desc, | |
118 | [MAX8997_LDO15] = &ldo_voltage_map_desc, | |
119 | [MAX8997_LDO16] = &ldo_voltage_map_desc, | |
120 | [MAX8997_LDO17] = &ldo_voltage_map_desc, | |
121 | [MAX8997_LDO18] = &ldo_voltage_map_desc, | |
122 | [MAX8997_LDO21] = &ldo_voltage_map_desc, | |
123 | [MAX8997_BUCK1] = &buck1245_voltage_map_desc, | |
124 | [MAX8997_BUCK2] = &buck1245_voltage_map_desc, | |
125 | [MAX8997_BUCK3] = &buck37_voltage_map_desc, | |
126 | [MAX8997_BUCK4] = &buck1245_voltage_map_desc, | |
127 | [MAX8997_BUCK5] = &buck1245_voltage_map_desc, | |
128 | [MAX8997_BUCK6] = NULL, | |
129 | [MAX8997_BUCK7] = &buck37_voltage_map_desc, | |
130 | [MAX8997_EN32KHZ_AP] = NULL, | |
131 | [MAX8997_EN32KHZ_CP] = NULL, | |
132 | [MAX8997_ENVICHG] = NULL, | |
133 | [MAX8997_ESAFEOUT1] = NULL, | |
134 | [MAX8997_ESAFEOUT2] = NULL, | |
135 | [MAX8997_CHARGER_CV] = NULL, | |
136 | [MAX8997_CHARGER] = &charger_current_map_desc, | |
137 | [MAX8997_CHARGER_TOPOFF] = &topoff_current_map_desc, | |
138 | }; | |
139 | ||
bd6ca2cf MH |
140 | static int max8997_list_voltage_charger_cv(struct regulator_dev *rdev, |
141 | unsigned int selector) | |
142 | { | |
b3e1348e | 143 | int rid = rdev_get_id(rdev); |
bd6ca2cf MH |
144 | |
145 | if (rid != MAX8997_CHARGER_CV) | |
146 | goto err; | |
147 | ||
148 | switch (selector) { | |
149 | case 0x00: | |
150 | return 4200000; | |
151 | case 0x01 ... 0x0E: | |
152 | return 4000000 + 20000 * (selector - 0x01); | |
153 | case 0x0F: | |
154 | return 4350000; | |
155 | default: | |
156 | return -EINVAL; | |
157 | } | |
158 | err: | |
159 | return -EINVAL; | |
160 | } | |
161 | ||
162 | static int max8997_list_voltage(struct regulator_dev *rdev, | |
163 | unsigned int selector) | |
164 | { | |
165 | const struct voltage_map_desc *desc; | |
b3e1348e | 166 | int rid = rdev_get_id(rdev); |
bd6ca2cf MH |
167 | int val; |
168 | ||
169 | if (rid >= ARRAY_SIZE(reg_voltage_map) || | |
170 | rid < 0) | |
171 | return -EINVAL; | |
172 | ||
173 | desc = reg_voltage_map[rid]; | |
174 | if (desc == NULL) | |
175 | return -EINVAL; | |
176 | ||
177 | val = desc->min + desc->step * selector; | |
178 | if (val > desc->max) | |
179 | return -EINVAL; | |
180 | ||
181 | return val * 1000; | |
182 | } | |
183 | ||
184 | static int max8997_get_enable_register(struct regulator_dev *rdev, | |
185 | int *reg, int *mask, int *pattern) | |
186 | { | |
b3e1348e | 187 | int rid = rdev_get_id(rdev); |
bd6ca2cf MH |
188 | |
189 | switch (rid) { | |
190 | case MAX8997_LDO1 ... MAX8997_LDO21: | |
191 | *reg = MAX8997_REG_LDO1CTRL + (rid - MAX8997_LDO1); | |
192 | *mask = 0xC0; | |
193 | *pattern = 0xC0; | |
194 | break; | |
195 | case MAX8997_BUCK1: | |
196 | *reg = MAX8997_REG_BUCK1CTRL; | |
197 | *mask = 0x01; | |
198 | *pattern = 0x01; | |
199 | break; | |
200 | case MAX8997_BUCK2: | |
201 | *reg = MAX8997_REG_BUCK2CTRL; | |
202 | *mask = 0x01; | |
203 | *pattern = 0x01; | |
204 | break; | |
205 | case MAX8997_BUCK3: | |
206 | *reg = MAX8997_REG_BUCK3CTRL; | |
207 | *mask = 0x01; | |
208 | *pattern = 0x01; | |
209 | break; | |
210 | case MAX8997_BUCK4: | |
211 | *reg = MAX8997_REG_BUCK4CTRL; | |
212 | *mask = 0x01; | |
213 | *pattern = 0x01; | |
214 | break; | |
215 | case MAX8997_BUCK5: | |
216 | *reg = MAX8997_REG_BUCK5CTRL; | |
217 | *mask = 0x01; | |
218 | *pattern = 0x01; | |
219 | break; | |
220 | case MAX8997_BUCK6: | |
221 | *reg = MAX8997_REG_BUCK6CTRL; | |
222 | *mask = 0x01; | |
223 | *pattern = 0x01; | |
224 | break; | |
225 | case MAX8997_BUCK7: | |
226 | *reg = MAX8997_REG_BUCK7CTRL; | |
227 | *mask = 0x01; | |
228 | *pattern = 0x01; | |
229 | break; | |
230 | case MAX8997_EN32KHZ_AP ... MAX8997_EN32KHZ_CP: | |
231 | *reg = MAX8997_REG_MAINCON1; | |
232 | *mask = 0x01 << (rid - MAX8997_EN32KHZ_AP); | |
233 | *pattern = 0x01 << (rid - MAX8997_EN32KHZ_AP); | |
234 | break; | |
235 | case MAX8997_ENVICHG: | |
236 | *reg = MAX8997_REG_MBCCTRL1; | |
237 | *mask = 0x80; | |
238 | *pattern = 0x80; | |
239 | break; | |
240 | case MAX8997_ESAFEOUT1 ... MAX8997_ESAFEOUT2: | |
241 | *reg = MAX8997_REG_SAFEOUTCTRL; | |
242 | *mask = 0x40 << (rid - MAX8997_ESAFEOUT1); | |
243 | *pattern = 0x40 << (rid - MAX8997_ESAFEOUT1); | |
244 | break; | |
245 | case MAX8997_CHARGER: | |
246 | *reg = MAX8997_REG_MBCCTRL2; | |
247 | *mask = 0x40; | |
248 | *pattern = 0x40; | |
249 | break; | |
250 | default: | |
251 | /* Not controllable or not exists */ | |
252 | return -EINVAL; | |
bd6ca2cf MH |
253 | } |
254 | ||
255 | return 0; | |
256 | } | |
257 | ||
258 | static int max8997_reg_is_enabled(struct regulator_dev *rdev) | |
259 | { | |
260 | struct max8997_data *max8997 = rdev_get_drvdata(rdev); | |
261 | struct i2c_client *i2c = max8997->iodev->i2c; | |
262 | int ret, reg, mask, pattern; | |
263 | u8 val; | |
264 | ||
265 | ret = max8997_get_enable_register(rdev, ®, &mask, &pattern); | |
c245c087 | 266 | if (ret) |
bd6ca2cf MH |
267 | return ret; |
268 | ||
269 | ret = max8997_read_reg(i2c, reg, &val); | |
270 | if (ret) | |
271 | return ret; | |
272 | ||
273 | return (val & mask) == pattern; | |
274 | } | |
275 | ||
276 | static int max8997_reg_enable(struct regulator_dev *rdev) | |
277 | { | |
278 | struct max8997_data *max8997 = rdev_get_drvdata(rdev); | |
279 | struct i2c_client *i2c = max8997->iodev->i2c; | |
280 | int ret, reg, mask, pattern; | |
281 | ||
282 | ret = max8997_get_enable_register(rdev, ®, &mask, &pattern); | |
283 | if (ret) | |
284 | return ret; | |
285 | ||
286 | return max8997_update_reg(i2c, reg, pattern, mask); | |
287 | } | |
288 | ||
289 | static int max8997_reg_disable(struct regulator_dev *rdev) | |
290 | { | |
291 | struct max8997_data *max8997 = rdev_get_drvdata(rdev); | |
292 | struct i2c_client *i2c = max8997->iodev->i2c; | |
293 | int ret, reg, mask, pattern; | |
294 | ||
295 | ret = max8997_get_enable_register(rdev, ®, &mask, &pattern); | |
296 | if (ret) | |
297 | return ret; | |
298 | ||
299 | return max8997_update_reg(i2c, reg, ~pattern, mask); | |
300 | } | |
301 | ||
302 | static int max8997_get_voltage_register(struct regulator_dev *rdev, | |
303 | int *_reg, int *_shift, int *_mask) | |
304 | { | |
6f43c380 | 305 | struct max8997_data *max8997 = rdev_get_drvdata(rdev); |
b3e1348e | 306 | int rid = rdev_get_id(rdev); |
bd6ca2cf MH |
307 | int reg, shift = 0, mask = 0x3f; |
308 | ||
309 | switch (rid) { | |
310 | case MAX8997_LDO1 ... MAX8997_LDO21: | |
311 | reg = MAX8997_REG_LDO1CTRL + (rid - MAX8997_LDO1); | |
312 | break; | |
313 | case MAX8997_BUCK1: | |
314 | reg = MAX8997_REG_BUCK1DVS1; | |
6f43c380 AL |
315 | if (max8997->buck1_gpiodvs) |
316 | reg += max8997->buck125_gpioindex; | |
bd6ca2cf MH |
317 | break; |
318 | case MAX8997_BUCK2: | |
319 | reg = MAX8997_REG_BUCK2DVS1; | |
6f43c380 AL |
320 | if (max8997->buck2_gpiodvs) |
321 | reg += max8997->buck125_gpioindex; | |
bd6ca2cf MH |
322 | break; |
323 | case MAX8997_BUCK3: | |
324 | reg = MAX8997_REG_BUCK3DVS; | |
325 | break; | |
326 | case MAX8997_BUCK4: | |
327 | reg = MAX8997_REG_BUCK4DVS; | |
328 | break; | |
329 | case MAX8997_BUCK5: | |
330 | reg = MAX8997_REG_BUCK5DVS1; | |
6f43c380 AL |
331 | if (max8997->buck5_gpiodvs) |
332 | reg += max8997->buck125_gpioindex; | |
bd6ca2cf MH |
333 | break; |
334 | case MAX8997_BUCK7: | |
335 | reg = MAX8997_REG_BUCK7DVS; | |
336 | break; | |
337 | case MAX8997_ESAFEOUT1 ... MAX8997_ESAFEOUT2: | |
338 | reg = MAX8997_REG_SAFEOUTCTRL; | |
339 | shift = (rid == MAX8997_ESAFEOUT2) ? 2 : 0; | |
340 | mask = 0x3; | |
341 | break; | |
342 | case MAX8997_CHARGER_CV: | |
343 | reg = MAX8997_REG_MBCCTRL3; | |
344 | shift = 0; | |
345 | mask = 0xf; | |
346 | break; | |
347 | case MAX8997_CHARGER: | |
348 | reg = MAX8997_REG_MBCCTRL4; | |
349 | shift = 0; | |
350 | mask = 0xf; | |
351 | break; | |
352 | case MAX8997_CHARGER_TOPOFF: | |
353 | reg = MAX8997_REG_MBCCTRL5; | |
354 | shift = 0; | |
355 | mask = 0xf; | |
356 | break; | |
357 | default: | |
358 | return -EINVAL; | |
359 | } | |
360 | ||
361 | *_reg = reg; | |
362 | *_shift = shift; | |
363 | *_mask = mask; | |
364 | ||
365 | return 0; | |
366 | } | |
367 | ||
9e96b3a7 | 368 | static int max8997_get_voltage_sel(struct regulator_dev *rdev) |
bd6ca2cf MH |
369 | { |
370 | struct max8997_data *max8997 = rdev_get_drvdata(rdev); | |
bd6ca2cf MH |
371 | struct i2c_client *i2c = max8997->iodev->i2c; |
372 | int reg, shift, mask, ret; | |
bd6ca2cf MH |
373 | u8 val; |
374 | ||
375 | ret = max8997_get_voltage_register(rdev, ®, &shift, &mask); | |
376 | if (ret) | |
377 | return ret; | |
378 | ||
bd6ca2cf MH |
379 | ret = max8997_read_reg(i2c, reg, &val); |
380 | if (ret) | |
381 | return ret; | |
382 | ||
383 | val >>= shift; | |
384 | val &= mask; | |
385 | ||
9e96b3a7 | 386 | return val; |
bd6ca2cf MH |
387 | } |
388 | ||
389 | static inline int max8997_get_voltage_proper_val( | |
390 | const struct voltage_map_desc *desc, | |
391 | int min_vol, int max_vol) | |
392 | { | |
2358b776 | 393 | int i; |
bd6ca2cf MH |
394 | |
395 | if (desc == NULL) | |
396 | return -EINVAL; | |
397 | ||
398 | if (max_vol < desc->min || min_vol > desc->max) | |
399 | return -EINVAL; | |
400 | ||
2358b776 AL |
401 | if (min_vol < desc->min) |
402 | min_vol = desc->min; | |
bd6ca2cf | 403 | |
2358b776 | 404 | i = DIV_ROUND_UP(min_vol - desc->min, desc->step); |
bd6ca2cf | 405 | |
bd6ca2cf | 406 | if (desc->min + desc->step * i > max_vol) |
bd6ca2cf MH |
407 | return -EINVAL; |
408 | ||
409 | return i; | |
410 | } | |
411 | ||
412 | static int max8997_set_voltage_charger_cv(struct regulator_dev *rdev, | |
413 | int min_uV, int max_uV, unsigned *selector) | |
414 | { | |
415 | struct max8997_data *max8997 = rdev_get_drvdata(rdev); | |
416 | struct i2c_client *i2c = max8997->iodev->i2c; | |
b3e1348e | 417 | int rid = rdev_get_id(rdev); |
bd6ca2cf MH |
418 | int lb, ub; |
419 | int reg, shift = 0, mask, ret = 0; | |
420 | u8 val = 0x0; | |
421 | ||
422 | if (rid != MAX8997_CHARGER_CV) | |
423 | return -EINVAL; | |
424 | ||
425 | ret = max8997_get_voltage_register(rdev, ®, &shift, &mask); | |
426 | if (ret) | |
427 | return ret; | |
428 | ||
429 | if (max_uV < 4000000 || min_uV > 4350000) | |
430 | return -EINVAL; | |
431 | ||
432 | if (min_uV <= 4000000) { | |
433 | if (max_uV >= 4000000) | |
434 | return -EINVAL; | |
435 | else | |
436 | val = 0x1; | |
437 | } else if (min_uV <= 4200000 && max_uV >= 4200000) | |
438 | val = 0x0; | |
439 | else { | |
440 | lb = (min_uV - 4000001) / 20000 + 2; | |
441 | ub = (max_uV - 4000000) / 20000 + 1; | |
442 | ||
443 | if (lb > ub) | |
444 | return -EINVAL; | |
445 | ||
446 | if (lb < 0xf) | |
447 | val = lb; | |
448 | else { | |
449 | if (ub >= 0xf) | |
450 | val = 0xf; | |
451 | else | |
452 | return -EINVAL; | |
453 | } | |
454 | } | |
455 | ||
456 | *selector = val; | |
457 | ||
458 | ret = max8997_update_reg(i2c, reg, val << shift, mask); | |
459 | ||
460 | return ret; | |
461 | } | |
462 | ||
463 | /* | |
464 | * For LDO1 ~ LDO21, BUCK1~5, BUCK7, CHARGER, CHARGER_TOPOFF | |
465 | * BUCK1, 2, and 5 are available if they are not controlled by gpio | |
466 | */ | |
467 | static int max8997_set_voltage_ldobuck(struct regulator_dev *rdev, | |
468 | int min_uV, int max_uV, unsigned *selector) | |
469 | { | |
470 | struct max8997_data *max8997 = rdev_get_drvdata(rdev); | |
471 | struct i2c_client *i2c = max8997->iodev->i2c; | |
472 | int min_vol = min_uV / 1000, max_vol = max_uV / 1000; | |
473 | const struct voltage_map_desc *desc; | |
b3e1348e | 474 | int rid = rdev_get_id(rdev); |
62bc4d4a | 475 | int i, reg, shift, mask, ret; |
bd6ca2cf MH |
476 | |
477 | switch (rid) { | |
478 | case MAX8997_LDO1 ... MAX8997_LDO21: | |
479 | break; | |
480 | case MAX8997_BUCK1 ... MAX8997_BUCK5: | |
481 | break; | |
482 | case MAX8997_BUCK6: | |
483 | return -EINVAL; | |
484 | case MAX8997_BUCK7: | |
485 | break; | |
486 | case MAX8997_CHARGER: | |
487 | break; | |
488 | case MAX8997_CHARGER_TOPOFF: | |
489 | break; | |
490 | default: | |
491 | return -EINVAL; | |
492 | } | |
493 | ||
494 | desc = reg_voltage_map[rid]; | |
495 | ||
496 | i = max8997_get_voltage_proper_val(desc, min_vol, max_vol); | |
497 | if (i < 0) | |
498 | return i; | |
499 | ||
500 | ret = max8997_get_voltage_register(rdev, ®, &shift, &mask); | |
501 | if (ret) | |
502 | return ret; | |
503 | ||
bd6ca2cf MH |
504 | ret = max8997_update_reg(i2c, reg, i << shift, mask << shift); |
505 | *selector = i; | |
506 | ||
62bc4d4a AL |
507 | return ret; |
508 | } | |
509 | ||
24bd4109 | 510 | static int max8997_set_voltage_buck_time_sel(struct regulator_dev *rdev, |
62bc4d4a AL |
511 | unsigned int old_selector, |
512 | unsigned int new_selector) | |
513 | { | |
514 | struct max8997_data *max8997 = rdev_get_drvdata(rdev); | |
515 | int rid = rdev_get_id(rdev); | |
516 | const struct voltage_map_desc *desc = reg_voltage_map[rid]; | |
517 | ||
518 | /* Delay is required only if the voltage is increasing */ | |
519 | if (old_selector >= new_selector) | |
520 | return 0; | |
521 | ||
522 | /* No need to delay if gpio_dvs_mode */ | |
523 | switch (rid) { | |
524 | case MAX8997_BUCK1: | |
525 | if (max8997->buck1_gpiodvs) | |
526 | return 0; | |
527 | break; | |
528 | case MAX8997_BUCK2: | |
529 | if (max8997->buck2_gpiodvs) | |
530 | return 0; | |
531 | break; | |
532 | case MAX8997_BUCK5: | |
533 | if (max8997->buck5_gpiodvs) | |
534 | return 0; | |
535 | break; | |
bd6ca2cf MH |
536 | } |
537 | ||
62bc4d4a AL |
538 | switch (rid) { |
539 | case MAX8997_BUCK1: | |
540 | case MAX8997_BUCK2: | |
541 | case MAX8997_BUCK4: | |
542 | case MAX8997_BUCK5: | |
543 | return DIV_ROUND_UP(desc->step * (new_selector - old_selector), | |
544 | max8997->ramp_delay); | |
bd6ca2cf MH |
545 | } |
546 | ||
62bc4d4a | 547 | return 0; |
bd6ca2cf MH |
548 | } |
549 | ||
550 | /* | |
551 | * Assess the damage on the voltage setting of BUCK1,2,5 by the change. | |
552 | * | |
553 | * When GPIO-DVS mode is used for multiple bucks, changing the voltage value | |
554 | * of one of the bucks may affect that of another buck, which is the side | |
555 | * effect of the change (set_voltage). This function examines the GPIO-DVS | |
556 | * configurations and checks whether such side-effect exists. | |
557 | */ | |
558 | static int max8997_assess_side_effect(struct regulator_dev *rdev, | |
559 | u8 new_val, int *best) | |
560 | { | |
561 | struct max8997_data *max8997 = rdev_get_drvdata(rdev); | |
b3e1348e | 562 | int rid = rdev_get_id(rdev); |
bd6ca2cf MH |
563 | u8 *buckx_val[3]; |
564 | bool buckx_gpiodvs[3]; | |
565 | int side_effect[8]; | |
566 | int min_side_effect = INT_MAX; | |
567 | int i; | |
568 | ||
569 | *best = -1; | |
570 | ||
571 | switch (rid) { | |
572 | case MAX8997_BUCK1: | |
573 | rid = 0; | |
574 | break; | |
575 | case MAX8997_BUCK2: | |
576 | rid = 1; | |
577 | break; | |
578 | case MAX8997_BUCK5: | |
579 | rid = 2; | |
580 | break; | |
581 | default: | |
582 | return -EINVAL; | |
583 | } | |
584 | ||
585 | buckx_val[0] = max8997->buck1_vol; | |
586 | buckx_val[1] = max8997->buck2_vol; | |
587 | buckx_val[2] = max8997->buck5_vol; | |
6e0414a5 MH |
588 | buckx_gpiodvs[0] = max8997->buck1_gpiodvs; |
589 | buckx_gpiodvs[1] = max8997->buck2_gpiodvs; | |
590 | buckx_gpiodvs[2] = max8997->buck5_gpiodvs; | |
bd6ca2cf MH |
591 | |
592 | for (i = 0; i < 8; i++) { | |
593 | int others; | |
594 | ||
595 | if (new_val != (buckx_val[rid])[i]) { | |
596 | side_effect[i] = -1; | |
597 | continue; | |
598 | } | |
599 | ||
600 | side_effect[i] = 0; | |
601 | for (others = 0; others < 3; others++) { | |
602 | int diff; | |
603 | ||
604 | if (others == rid) | |
605 | continue; | |
606 | if (buckx_gpiodvs[others] == false) | |
607 | continue; /* Not affected */ | |
608 | diff = (buckx_val[others])[i] - | |
609 | (buckx_val[others])[max8997->buck125_gpioindex]; | |
610 | if (diff > 0) | |
611 | side_effect[i] += diff; | |
612 | else if (diff < 0) | |
613 | side_effect[i] -= diff; | |
614 | } | |
615 | if (side_effect[i] == 0) { | |
616 | *best = i; | |
617 | return 0; /* NO SIDE EFFECT! Use This! */ | |
618 | } | |
619 | if (side_effect[i] < min_side_effect) { | |
620 | min_side_effect = side_effect[i]; | |
621 | *best = i; | |
622 | } | |
623 | } | |
624 | ||
625 | if (*best == -1) | |
626 | return -EINVAL; | |
627 | ||
628 | return side_effect[*best]; | |
629 | } | |
630 | ||
631 | /* | |
632 | * For Buck 1 ~ 5 and 7. If it is not controlled by GPIO, this calls | |
633 | * max8997_set_voltage_ldobuck to do the job. | |
634 | */ | |
635 | static int max8997_set_voltage_buck(struct regulator_dev *rdev, | |
636 | int min_uV, int max_uV, unsigned *selector) | |
637 | { | |
638 | struct max8997_data *max8997 = rdev_get_drvdata(rdev); | |
b3e1348e | 639 | int rid = rdev_get_id(rdev); |
bd6ca2cf MH |
640 | const struct voltage_map_desc *desc; |
641 | int new_val, new_idx, damage, tmp_val, tmp_idx, tmp_dmg; | |
642 | bool gpio_dvs_mode = false; | |
643 | int min_vol = min_uV / 1000, max_vol = max_uV / 1000; | |
644 | ||
645 | if (rid < MAX8997_BUCK1 || rid > MAX8997_BUCK7) | |
646 | return -EINVAL; | |
647 | ||
648 | switch (rid) { | |
649 | case MAX8997_BUCK1: | |
6e0414a5 | 650 | if (max8997->buck1_gpiodvs) |
bd6ca2cf MH |
651 | gpio_dvs_mode = true; |
652 | break; | |
653 | case MAX8997_BUCK2: | |
6e0414a5 | 654 | if (max8997->buck2_gpiodvs) |
bd6ca2cf MH |
655 | gpio_dvs_mode = true; |
656 | break; | |
657 | case MAX8997_BUCK5: | |
6e0414a5 | 658 | if (max8997->buck5_gpiodvs) |
bd6ca2cf MH |
659 | gpio_dvs_mode = true; |
660 | break; | |
661 | } | |
662 | ||
663 | if (!gpio_dvs_mode) | |
664 | return max8997_set_voltage_ldobuck(rdev, min_uV, max_uV, | |
665 | selector); | |
666 | ||
667 | desc = reg_voltage_map[rid]; | |
668 | new_val = max8997_get_voltage_proper_val(desc, min_vol, max_vol); | |
669 | if (new_val < 0) | |
670 | return new_val; | |
671 | ||
672 | tmp_dmg = INT_MAX; | |
673 | tmp_idx = -1; | |
674 | tmp_val = -1; | |
675 | do { | |
676 | damage = max8997_assess_side_effect(rdev, new_val, &new_idx); | |
677 | if (damage == 0) | |
678 | goto out; | |
679 | ||
680 | if (tmp_dmg > damage) { | |
681 | tmp_idx = new_idx; | |
682 | tmp_val = new_val; | |
683 | tmp_dmg = damage; | |
684 | } | |
685 | ||
686 | new_val++; | |
f55205f4 | 687 | } while (desc->min + desc->step * new_val <= desc->max); |
bd6ca2cf MH |
688 | |
689 | new_idx = tmp_idx; | |
690 | new_val = tmp_val; | |
691 | ||
6e0414a5 | 692 | if (max8997->ignore_gpiodvs_side_effect == false) |
bd6ca2cf MH |
693 | return -EINVAL; |
694 | ||
695 | dev_warn(&rdev->dev, "MAX8997 GPIO-DVS Side Effect Warning: GPIO SET:" | |
696 | " %d -> %d\n", max8997->buck125_gpioindex, tmp_idx); | |
697 | ||
698 | out: | |
699 | if (new_idx < 0 || new_val < 0) | |
700 | return -EINVAL; | |
701 | ||
702 | max8997->buck125_gpioindex = new_idx; | |
703 | max8997_set_gpio(max8997); | |
704 | *selector = new_val; | |
705 | ||
706 | return 0; | |
707 | } | |
708 | ||
bd6ca2cf | 709 | /* For SAFEOUT1 and SAFEOUT2 */ |
b79ca051 AL |
710 | static int max8997_set_voltage_safeout_sel(struct regulator_dev *rdev, |
711 | unsigned selector) | |
bd6ca2cf MH |
712 | { |
713 | struct max8997_data *max8997 = rdev_get_drvdata(rdev); | |
714 | struct i2c_client *i2c = max8997->iodev->i2c; | |
b3e1348e | 715 | int rid = rdev_get_id(rdev); |
bd6ca2cf | 716 | int reg, shift = 0, mask, ret; |
bd6ca2cf MH |
717 | |
718 | if (rid != MAX8997_ESAFEOUT1 && rid != MAX8997_ESAFEOUT2) | |
719 | return -EINVAL; | |
720 | ||
bd6ca2cf MH |
721 | ret = max8997_get_voltage_register(rdev, ®, &shift, &mask); |
722 | if (ret) | |
723 | return ret; | |
724 | ||
b79ca051 | 725 | return max8997_update_reg(i2c, reg, selector << shift, mask << shift); |
bd6ca2cf MH |
726 | } |
727 | ||
bd6ca2cf MH |
728 | static int max8997_reg_disable_suspend(struct regulator_dev *rdev) |
729 | { | |
730 | struct max8997_data *max8997 = rdev_get_drvdata(rdev); | |
731 | struct i2c_client *i2c = max8997->iodev->i2c; | |
732 | int ret, reg, mask, pattern; | |
b3e1348e | 733 | int rid = rdev_get_id(rdev); |
bd6ca2cf MH |
734 | |
735 | ret = max8997_get_enable_register(rdev, ®, &mask, &pattern); | |
736 | if (ret) | |
737 | return ret; | |
738 | ||
739 | max8997_read_reg(i2c, reg, &max8997->saved_states[rid]); | |
740 | ||
741 | if (rid == MAX8997_LDO1 || | |
742 | rid == MAX8997_LDO10 || | |
743 | rid == MAX8997_LDO21) { | |
744 | dev_dbg(&rdev->dev, "Conditional Power-Off for %s\n", | |
745 | rdev->desc->name); | |
746 | return max8997_update_reg(i2c, reg, 0x40, mask); | |
747 | } | |
748 | ||
749 | dev_dbg(&rdev->dev, "Full Power-Off for %s (%xh -> %xh)\n", | |
750 | rdev->desc->name, max8997->saved_states[rid] & mask, | |
751 | (~pattern) & mask); | |
752 | return max8997_update_reg(i2c, reg, ~pattern, mask); | |
753 | } | |
754 | ||
755 | static struct regulator_ops max8997_ldo_ops = { | |
756 | .list_voltage = max8997_list_voltage, | |
757 | .is_enabled = max8997_reg_is_enabled, | |
758 | .enable = max8997_reg_enable, | |
759 | .disable = max8997_reg_disable, | |
9e96b3a7 | 760 | .get_voltage_sel = max8997_get_voltage_sel, |
bd6ca2cf | 761 | .set_voltage = max8997_set_voltage_ldobuck, |
bd6ca2cf MH |
762 | .set_suspend_disable = max8997_reg_disable_suspend, |
763 | }; | |
764 | ||
765 | static struct regulator_ops max8997_buck_ops = { | |
766 | .list_voltage = max8997_list_voltage, | |
767 | .is_enabled = max8997_reg_is_enabled, | |
768 | .enable = max8997_reg_enable, | |
769 | .disable = max8997_reg_disable, | |
9e96b3a7 | 770 | .get_voltage_sel = max8997_get_voltage_sel, |
bd6ca2cf | 771 | .set_voltage = max8997_set_voltage_buck, |
24bd4109 | 772 | .set_voltage_time_sel = max8997_set_voltage_buck_time_sel, |
bd6ca2cf MH |
773 | .set_suspend_disable = max8997_reg_disable_suspend, |
774 | }; | |
775 | ||
776 | static struct regulator_ops max8997_fixedvolt_ops = { | |
777 | .list_voltage = max8997_list_voltage, | |
778 | .is_enabled = max8997_reg_is_enabled, | |
779 | .enable = max8997_reg_enable, | |
780 | .disable = max8997_reg_disable, | |
bd6ca2cf MH |
781 | .set_suspend_disable = max8997_reg_disable_suspend, |
782 | }; | |
783 | ||
784 | static struct regulator_ops max8997_safeout_ops = { | |
b79ca051 | 785 | .list_voltage = regulator_list_voltage_table, |
bd6ca2cf MH |
786 | .is_enabled = max8997_reg_is_enabled, |
787 | .enable = max8997_reg_enable, | |
788 | .disable = max8997_reg_disable, | |
9e96b3a7 | 789 | .get_voltage_sel = max8997_get_voltage_sel, |
b79ca051 | 790 | .set_voltage_sel = max8997_set_voltage_safeout_sel, |
bd6ca2cf MH |
791 | .set_suspend_disable = max8997_reg_disable_suspend, |
792 | }; | |
793 | ||
794 | static struct regulator_ops max8997_fixedstate_ops = { | |
795 | .list_voltage = max8997_list_voltage_charger_cv, | |
9e96b3a7 | 796 | .get_voltage_sel = max8997_get_voltage_sel, |
bd6ca2cf MH |
797 | .set_voltage = max8997_set_voltage_charger_cv, |
798 | }; | |
799 | ||
9e96b3a7 AL |
800 | static int max8997_set_current_limit(struct regulator_dev *rdev, |
801 | int min_uA, int max_uA) | |
bd6ca2cf MH |
802 | { |
803 | unsigned dummy; | |
9e96b3a7 | 804 | int rid = rdev_get_id(rdev); |
bd6ca2cf | 805 | |
9e96b3a7 AL |
806 | if (rid != MAX8997_CHARGER && rid != MAX8997_CHARGER_TOPOFF) |
807 | return -EINVAL; | |
bd6ca2cf | 808 | |
9e96b3a7 AL |
809 | /* Reuse max8997_set_voltage_ldobuck to set current_limit. */ |
810 | return max8997_set_voltage_ldobuck(rdev, min_uA, max_uA, &dummy); | |
bd6ca2cf MH |
811 | } |
812 | ||
9e96b3a7 AL |
813 | static int max8997_get_current_limit(struct regulator_dev *rdev) |
814 | { | |
815 | int sel, rid = rdev_get_id(rdev); | |
816 | ||
817 | if (rid != MAX8997_CHARGER && rid != MAX8997_CHARGER_TOPOFF) | |
818 | return -EINVAL; | |
819 | ||
820 | sel = max8997_get_voltage_sel(rdev); | |
821 | if (sel < 0) | |
822 | return sel; | |
823 | ||
824 | /* Reuse max8997_list_voltage to get current_limit. */ | |
825 | return max8997_list_voltage(rdev, sel); | |
826 | } | |
bd6ca2cf MH |
827 | |
828 | static struct regulator_ops max8997_charger_ops = { | |
829 | .is_enabled = max8997_reg_is_enabled, | |
830 | .enable = max8997_reg_enable, | |
831 | .disable = max8997_reg_disable, | |
9e96b3a7 AL |
832 | .get_current_limit = max8997_get_current_limit, |
833 | .set_current_limit = max8997_set_current_limit, | |
bd6ca2cf MH |
834 | }; |
835 | ||
836 | static struct regulator_ops max8997_charger_fixedstate_ops = { | |
9e96b3a7 AL |
837 | .get_current_limit = max8997_get_current_limit, |
838 | .set_current_limit = max8997_set_current_limit, | |
bd6ca2cf MH |
839 | }; |
840 | ||
4533f80e AL |
841 | #define MAX8997_VOLTAGE_REGULATOR(_name, _ops) {\ |
842 | .name = #_name, \ | |
843 | .id = MAX8997_##_name, \ | |
844 | .ops = &_ops, \ | |
bd6ca2cf MH |
845 | .type = REGULATOR_VOLTAGE, \ |
846 | .owner = THIS_MODULE, \ | |
847 | } | |
4533f80e AL |
848 | |
849 | #define MAX8997_CURRENT_REGULATOR(_name, _ops) {\ | |
850 | .name = #_name, \ | |
851 | .id = MAX8997_##_name, \ | |
852 | .ops = &_ops, \ | |
853 | .type = REGULATOR_CURRENT, \ | |
bd6ca2cf MH |
854 | .owner = THIS_MODULE, \ |
855 | } | |
856 | ||
857 | static struct regulator_desc regulators[] = { | |
4533f80e AL |
858 | MAX8997_VOLTAGE_REGULATOR(LDO1, max8997_ldo_ops), |
859 | MAX8997_VOLTAGE_REGULATOR(LDO2, max8997_ldo_ops), | |
860 | MAX8997_VOLTAGE_REGULATOR(LDO3, max8997_ldo_ops), | |
861 | MAX8997_VOLTAGE_REGULATOR(LDO4, max8997_ldo_ops), | |
862 | MAX8997_VOLTAGE_REGULATOR(LDO5, max8997_ldo_ops), | |
863 | MAX8997_VOLTAGE_REGULATOR(LDO6, max8997_ldo_ops), | |
864 | MAX8997_VOLTAGE_REGULATOR(LDO7, max8997_ldo_ops), | |
865 | MAX8997_VOLTAGE_REGULATOR(LDO8, max8997_ldo_ops), | |
866 | MAX8997_VOLTAGE_REGULATOR(LDO9, max8997_ldo_ops), | |
867 | MAX8997_VOLTAGE_REGULATOR(LDO10, max8997_ldo_ops), | |
868 | MAX8997_VOLTAGE_REGULATOR(LDO11, max8997_ldo_ops), | |
869 | MAX8997_VOLTAGE_REGULATOR(LDO12, max8997_ldo_ops), | |
870 | MAX8997_VOLTAGE_REGULATOR(LDO13, max8997_ldo_ops), | |
871 | MAX8997_VOLTAGE_REGULATOR(LDO14, max8997_ldo_ops), | |
872 | MAX8997_VOLTAGE_REGULATOR(LDO15, max8997_ldo_ops), | |
873 | MAX8997_VOLTAGE_REGULATOR(LDO16, max8997_ldo_ops), | |
874 | MAX8997_VOLTAGE_REGULATOR(LDO17, max8997_ldo_ops), | |
875 | MAX8997_VOLTAGE_REGULATOR(LDO18, max8997_ldo_ops), | |
876 | MAX8997_VOLTAGE_REGULATOR(LDO21, max8997_ldo_ops), | |
877 | MAX8997_VOLTAGE_REGULATOR(BUCK1, max8997_buck_ops), | |
878 | MAX8997_VOLTAGE_REGULATOR(BUCK2, max8997_buck_ops), | |
879 | MAX8997_VOLTAGE_REGULATOR(BUCK3, max8997_buck_ops), | |
880 | MAX8997_VOLTAGE_REGULATOR(BUCK4, max8997_buck_ops), | |
881 | MAX8997_VOLTAGE_REGULATOR(BUCK5, max8997_buck_ops), | |
882 | MAX8997_VOLTAGE_REGULATOR(BUCK6, max8997_fixedvolt_ops), | |
883 | MAX8997_VOLTAGE_REGULATOR(BUCK7, max8997_buck_ops), | |
884 | MAX8997_VOLTAGE_REGULATOR(EN32KHZ_AP, max8997_fixedvolt_ops), | |
885 | MAX8997_VOLTAGE_REGULATOR(EN32KHZ_CP, max8997_fixedvolt_ops), | |
886 | MAX8997_VOLTAGE_REGULATOR(ENVICHG, max8997_fixedvolt_ops), | |
887 | MAX8997_VOLTAGE_REGULATOR(ESAFEOUT1, max8997_safeout_ops), | |
888 | MAX8997_VOLTAGE_REGULATOR(ESAFEOUT2, max8997_safeout_ops), | |
889 | MAX8997_VOLTAGE_REGULATOR(CHARGER_CV, max8997_fixedstate_ops), | |
890 | MAX8997_CURRENT_REGULATOR(CHARGER, max8997_charger_ops), | |
891 | MAX8997_CURRENT_REGULATOR(CHARGER_TOPOFF, | |
892 | max8997_charger_fixedstate_ops), | |
bd6ca2cf MH |
893 | }; |
894 | ||
77b71b37 TA |
895 | #ifdef CONFIG_OF |
896 | static int max8997_pmic_dt_parse_dvs_gpio(struct max8997_dev *iodev, | |
897 | struct max8997_platform_data *pdata, | |
898 | struct device_node *pmic_np) | |
899 | { | |
900 | int i, gpio; | |
901 | ||
902 | for (i = 0; i < 3; i++) { | |
903 | gpio = of_get_named_gpio(pmic_np, | |
904 | "max8997,pmic-buck125-dvs-gpios", i); | |
905 | if (!gpio_is_valid(gpio)) { | |
906 | dev_err(iodev->dev, "invalid gpio[%d]: %d\n", i, gpio); | |
907 | return -EINVAL; | |
908 | } | |
909 | pdata->buck125_gpios[i] = gpio; | |
910 | } | |
911 | return 0; | |
912 | } | |
913 | ||
914 | static int max8997_pmic_dt_parse_pdata(struct max8997_dev *iodev, | |
915 | struct max8997_platform_data *pdata) | |
916 | { | |
917 | struct device_node *pmic_np, *regulators_np, *reg_np; | |
918 | struct max8997_regulator_data *rdata; | |
919 | unsigned int i, dvs_voltage_nr = 1, ret; | |
920 | ||
921 | pmic_np = iodev->dev->of_node; | |
922 | if (!pmic_np) { | |
923 | dev_err(iodev->dev, "could not find pmic sub-node\n"); | |
924 | return -ENODEV; | |
925 | } | |
926 | ||
927 | regulators_np = of_find_node_by_name(pmic_np, "regulators"); | |
928 | if (!regulators_np) { | |
929 | dev_err(iodev->dev, "could not find regulators sub-node\n"); | |
930 | return -EINVAL; | |
931 | } | |
932 | ||
933 | /* count the number of regulators to be supported in pmic */ | |
934 | pdata->num_regulators = 0; | |
935 | for_each_child_of_node(regulators_np, reg_np) | |
936 | pdata->num_regulators++; | |
937 | ||
938 | rdata = devm_kzalloc(iodev->dev, sizeof(*rdata) * | |
939 | pdata->num_regulators, GFP_KERNEL); | |
940 | if (!rdata) { | |
941 | dev_err(iodev->dev, "could not allocate memory for " | |
942 | "regulator data\n"); | |
943 | return -ENOMEM; | |
944 | } | |
945 | ||
946 | pdata->regulators = rdata; | |
947 | for_each_child_of_node(regulators_np, reg_np) { | |
948 | for (i = 0; i < ARRAY_SIZE(regulators); i++) | |
949 | if (!of_node_cmp(reg_np->name, regulators[i].name)) | |
950 | break; | |
951 | ||
952 | if (i == ARRAY_SIZE(regulators)) { | |
953 | dev_warn(iodev->dev, "don't know how to configure " | |
954 | "regulator %s\n", reg_np->name); | |
955 | continue; | |
956 | } | |
957 | ||
958 | rdata->id = i; | |
959 | rdata->initdata = of_get_regulator_init_data( | |
960 | iodev->dev, reg_np); | |
961 | rdata->reg_node = reg_np; | |
962 | rdata++; | |
963 | } | |
964 | ||
965 | if (of_get_property(pmic_np, "max8997,pmic-buck1-uses-gpio-dvs", NULL)) | |
966 | pdata->buck1_gpiodvs = true; | |
967 | ||
968 | if (of_get_property(pmic_np, "max8997,pmic-buck2-uses-gpio-dvs", NULL)) | |
969 | pdata->buck2_gpiodvs = true; | |
970 | ||
971 | if (of_get_property(pmic_np, "max8997,pmic-buck5-uses-gpio-dvs", NULL)) | |
972 | pdata->buck5_gpiodvs = true; | |
973 | ||
974 | if (pdata->buck1_gpiodvs || pdata->buck2_gpiodvs || | |
975 | pdata->buck5_gpiodvs) { | |
976 | ret = max8997_pmic_dt_parse_dvs_gpio(iodev, pdata, pmic_np); | |
977 | if (ret) | |
978 | return -EINVAL; | |
979 | ||
980 | if (of_property_read_u32(pmic_np, | |
981 | "max8997,pmic-buck125-default-dvs-idx", | |
982 | &pdata->buck125_default_idx)) { | |
983 | pdata->buck125_default_idx = 0; | |
984 | } else { | |
985 | if (pdata->buck125_default_idx >= 8) { | |
986 | pdata->buck125_default_idx = 0; | |
987 | dev_info(iodev->dev, "invalid value for " | |
988 | "default dvs index, using 0 instead\n"); | |
989 | } | |
990 | } | |
991 | ||
992 | if (of_get_property(pmic_np, | |
993 | "max8997,pmic-ignore-gpiodvs-side-effect", NULL)) | |
994 | pdata->ignore_gpiodvs_side_effect = true; | |
995 | ||
996 | dvs_voltage_nr = 8; | |
997 | } | |
998 | ||
999 | if (of_property_read_u32_array(pmic_np, | |
1000 | "max8997,pmic-buck1-dvs-voltage", | |
1001 | pdata->buck1_voltage, dvs_voltage_nr)) { | |
1002 | dev_err(iodev->dev, "buck1 voltages not specified\n"); | |
1003 | return -EINVAL; | |
1004 | } | |
1005 | ||
1006 | if (of_property_read_u32_array(pmic_np, | |
1007 | "max8997,pmic-buck2-dvs-voltage", | |
1008 | pdata->buck2_voltage, dvs_voltage_nr)) { | |
1009 | dev_err(iodev->dev, "buck2 voltages not specified\n"); | |
1010 | return -EINVAL; | |
1011 | } | |
1012 | ||
1013 | if (of_property_read_u32_array(pmic_np, | |
1014 | "max8997,pmic-buck5-dvs-voltage", | |
1015 | pdata->buck5_voltage, dvs_voltage_nr)) { | |
1016 | dev_err(iodev->dev, "buck5 voltages not specified\n"); | |
1017 | return -EINVAL; | |
1018 | } | |
1019 | ||
1020 | return 0; | |
1021 | } | |
1022 | #else | |
1023 | static int max8997_pmic_dt_parse_pdata(struct max8997_dev *iodev, | |
1024 | struct max8997_platform_data *pdata) | |
1025 | { | |
1026 | return 0; | |
1027 | } | |
1028 | #endif /* CONFIG_OF */ | |
1029 | ||
a5023574 | 1030 | static int max8997_pmic_probe(struct platform_device *pdev) |
bd6ca2cf MH |
1031 | { |
1032 | struct max8997_dev *iodev = dev_get_drvdata(pdev->dev.parent); | |
77b71b37 | 1033 | struct max8997_platform_data *pdata = iodev->pdata; |
c172708d | 1034 | struct regulator_config config = { }; |
bd6ca2cf MH |
1035 | struct regulator_dev **rdev; |
1036 | struct max8997_data *max8997; | |
1037 | struct i2c_client *i2c; | |
068a8c82 | 1038 | int i, ret, size, nr_dvs; |
bd6ca2cf MH |
1039 | u8 max_buck1 = 0, max_buck2 = 0, max_buck5 = 0; |
1040 | ||
77b71b37 | 1041 | if (IS_ERR_OR_NULL(pdata)) { |
bd6ca2cf MH |
1042 | dev_err(pdev->dev.parent, "No platform init data supplied.\n"); |
1043 | return -ENODEV; | |
1044 | } | |
1045 | ||
77b71b37 TA |
1046 | if (iodev->dev->of_node) { |
1047 | ret = max8997_pmic_dt_parse_pdata(iodev, pdata); | |
1048 | if (ret) | |
1049 | return ret; | |
1050 | } | |
1051 | ||
8ae5767b AL |
1052 | max8997 = devm_kzalloc(&pdev->dev, sizeof(struct max8997_data), |
1053 | GFP_KERNEL); | |
bd6ca2cf MH |
1054 | if (!max8997) |
1055 | return -ENOMEM; | |
1056 | ||
1057 | size = sizeof(struct regulator_dev *) * pdata->num_regulators; | |
8ae5767b AL |
1058 | max8997->rdev = devm_kzalloc(&pdev->dev, size, GFP_KERNEL); |
1059 | if (!max8997->rdev) | |
bd6ca2cf | 1060 | return -ENOMEM; |
bd6ca2cf MH |
1061 | |
1062 | rdev = max8997->rdev; | |
1063 | max8997->dev = &pdev->dev; | |
1064 | max8997->iodev = iodev; | |
1065 | max8997->num_regulators = pdata->num_regulators; | |
1066 | platform_set_drvdata(pdev, max8997); | |
1067 | i2c = max8997->iodev->i2c; | |
1068 | ||
1069 | max8997->buck125_gpioindex = pdata->buck125_default_idx; | |
6e0414a5 MH |
1070 | max8997->buck1_gpiodvs = pdata->buck1_gpiodvs; |
1071 | max8997->buck2_gpiodvs = pdata->buck2_gpiodvs; | |
1072 | max8997->buck5_gpiodvs = pdata->buck5_gpiodvs; | |
1073 | memcpy(max8997->buck125_gpios, pdata->buck125_gpios, sizeof(int) * 3); | |
1074 | max8997->ignore_gpiodvs_side_effect = pdata->ignore_gpiodvs_side_effect; | |
bd6ca2cf | 1075 | |
068a8c82 TA |
1076 | nr_dvs = (pdata->buck1_gpiodvs || pdata->buck2_gpiodvs || |
1077 | pdata->buck5_gpiodvs) ? 8 : 1; | |
1078 | ||
1079 | for (i = 0; i < nr_dvs; i++) { | |
bd6ca2cf MH |
1080 | max8997->buck1_vol[i] = ret = |
1081 | max8997_get_voltage_proper_val( | |
1082 | &buck1245_voltage_map_desc, | |
1083 | pdata->buck1_voltage[i] / 1000, | |
1084 | pdata->buck1_voltage[i] / 1000 + | |
1085 | buck1245_voltage_map_desc.step); | |
1086 | if (ret < 0) | |
8ae5767b | 1087 | goto err_out; |
bd6ca2cf MH |
1088 | |
1089 | max8997->buck2_vol[i] = ret = | |
1090 | max8997_get_voltage_proper_val( | |
1091 | &buck1245_voltage_map_desc, | |
1092 | pdata->buck2_voltage[i] / 1000, | |
1093 | pdata->buck2_voltage[i] / 1000 + | |
1094 | buck1245_voltage_map_desc.step); | |
1095 | if (ret < 0) | |
8ae5767b | 1096 | goto err_out; |
bd6ca2cf MH |
1097 | |
1098 | max8997->buck5_vol[i] = ret = | |
1099 | max8997_get_voltage_proper_val( | |
1100 | &buck1245_voltage_map_desc, | |
1101 | pdata->buck5_voltage[i] / 1000, | |
1102 | pdata->buck5_voltage[i] / 1000 + | |
1103 | buck1245_voltage_map_desc.step); | |
1104 | if (ret < 0) | |
8ae5767b | 1105 | goto err_out; |
bd6ca2cf MH |
1106 | |
1107 | if (max_buck1 < max8997->buck1_vol[i]) | |
1108 | max_buck1 = max8997->buck1_vol[i]; | |
1109 | if (max_buck2 < max8997->buck2_vol[i]) | |
1110 | max_buck2 = max8997->buck2_vol[i]; | |
1111 | if (max_buck5 < max8997->buck5_vol[i]) | |
1112 | max_buck5 = max8997->buck5_vol[i]; | |
1113 | } | |
1114 | ||
1115 | /* For the safety, set max voltage before setting up */ | |
1116 | for (i = 0; i < 8; i++) { | |
ecb9c4f5 | 1117 | max8997_update_reg(i2c, MAX8997_REG_BUCK1DVS1 + i, |
bd6ca2cf | 1118 | max_buck1, 0x3f); |
ecb9c4f5 | 1119 | max8997_update_reg(i2c, MAX8997_REG_BUCK2DVS1 + i, |
bd6ca2cf | 1120 | max_buck2, 0x3f); |
ecb9c4f5 | 1121 | max8997_update_reg(i2c, MAX8997_REG_BUCK5DVS1 + i, |
bd6ca2cf MH |
1122 | max_buck5, 0x3f); |
1123 | } | |
1124 | ||
11ec7bf0 | 1125 | /* Initialize all the DVS related BUCK registers */ |
068a8c82 | 1126 | for (i = 0; i < nr_dvs; i++) { |
11ec7bf0 TA |
1127 | max8997_update_reg(i2c, MAX8997_REG_BUCK1DVS1 + i, |
1128 | max8997->buck1_vol[i], | |
1129 | 0x3f); | |
1130 | max8997_update_reg(i2c, MAX8997_REG_BUCK2DVS1 + i, | |
1131 | max8997->buck2_vol[i], | |
1132 | 0x3f); | |
1133 | max8997_update_reg(i2c, MAX8997_REG_BUCK5DVS1 + i, | |
1134 | max8997->buck5_vol[i], | |
1135 | 0x3f); | |
1136 | } | |
1137 | ||
bd6ca2cf MH |
1138 | /* |
1139 | * If buck 1, 2, and 5 do not care DVS GPIO settings, ignore them. | |
1140 | * If at least one of them cares, set gpios. | |
1141 | */ | |
1142 | if (pdata->buck1_gpiodvs || pdata->buck2_gpiodvs || | |
1143 | pdata->buck5_gpiodvs) { | |
bd6ca2cf MH |
1144 | |
1145 | if (!gpio_is_valid(pdata->buck125_gpios[0]) || | |
1146 | !gpio_is_valid(pdata->buck125_gpios[1]) || | |
1147 | !gpio_is_valid(pdata->buck125_gpios[2])) { | |
1148 | dev_err(&pdev->dev, "GPIO NOT VALID\n"); | |
1149 | ret = -EINVAL; | |
8ae5767b | 1150 | goto err_out; |
bd6ca2cf MH |
1151 | } |
1152 | ||
8fa25eda AL |
1153 | ret = devm_gpio_request(&pdev->dev, pdata->buck125_gpios[0], |
1154 | "MAX8997 SET1"); | |
1155 | if (ret) | |
8ae5767b | 1156 | goto err_out; |
8fa25eda AL |
1157 | |
1158 | ret = devm_gpio_request(&pdev->dev, pdata->buck125_gpios[1], | |
1159 | "MAX8997 SET2"); | |
1160 | if (ret) | |
8ae5767b | 1161 | goto err_out; |
bd6ca2cf | 1162 | |
8fa25eda | 1163 | ret = devm_gpio_request(&pdev->dev, pdata->buck125_gpios[2], |
bd6ca2cf | 1164 | "MAX8997 SET3"); |
8fa25eda | 1165 | if (ret) |
8ae5767b | 1166 | goto err_out; |
bd6ca2cf MH |
1167 | |
1168 | gpio_direction_output(pdata->buck125_gpios[0], | |
1169 | (max8997->buck125_gpioindex >> 2) | |
1170 | & 0x1); /* SET1 */ | |
1171 | gpio_direction_output(pdata->buck125_gpios[1], | |
1172 | (max8997->buck125_gpioindex >> 1) | |
1173 | & 0x1); /* SET2 */ | |
1174 | gpio_direction_output(pdata->buck125_gpios[2], | |
1175 | (max8997->buck125_gpioindex >> 0) | |
1176 | & 0x1); /* SET3 */ | |
bd6ca2cf MH |
1177 | } |
1178 | ||
1179 | /* DVS-GPIO disabled */ | |
1180 | max8997_update_reg(i2c, MAX8997_REG_BUCK1CTRL, (pdata->buck1_gpiodvs) ? | |
1181 | (1 << 1) : (0 << 1), 1 << 1); | |
1182 | max8997_update_reg(i2c, MAX8997_REG_BUCK2CTRL, (pdata->buck2_gpiodvs) ? | |
1183 | (1 << 1) : (0 << 1), 1 << 1); | |
1184 | max8997_update_reg(i2c, MAX8997_REG_BUCK5CTRL, (pdata->buck5_gpiodvs) ? | |
1185 | (1 << 1) : (0 << 1), 1 << 1); | |
1186 | ||
dbb48e7c TB |
1187 | /* Misc Settings */ |
1188 | max8997->ramp_delay = 10; /* set 10mV/us, which is the default */ | |
1189 | max8997_write_reg(i2c, MAX8997_REG_BUCKRAMP, (0xf << 4) | 0x9); | |
1190 | ||
bd6ca2cf MH |
1191 | for (i = 0; i < pdata->num_regulators; i++) { |
1192 | const struct voltage_map_desc *desc; | |
1193 | int id = pdata->regulators[i].id; | |
1194 | ||
1195 | desc = reg_voltage_map[id]; | |
b79ca051 | 1196 | if (desc) { |
bd6ca2cf MH |
1197 | regulators[id].n_voltages = |
1198 | (desc->max - desc->min) / desc->step + 1; | |
b79ca051 AL |
1199 | } else if (id == MAX8997_ESAFEOUT1 || id == MAX8997_ESAFEOUT2) { |
1200 | regulators[id].volt_table = safeoutvolt; | |
1201 | regulators[id].n_voltages = ARRAY_SIZE(safeoutvolt); | |
1202 | } else if (id == MAX8997_CHARGER_CV) { | |
bd6ca2cf | 1203 | regulators[id].n_voltages = 16; |
b79ca051 | 1204 | } |
bd6ca2cf | 1205 | |
c172708d MB |
1206 | config.dev = max8997->dev; |
1207 | config.init_data = pdata->regulators[i].initdata; | |
1208 | config.driver_data = max8997; | |
77b71b37 | 1209 | config.of_node = pdata->regulators[i].reg_node; |
c172708d MB |
1210 | |
1211 | rdev[i] = regulator_register(®ulators[id], &config); | |
bd6ca2cf MH |
1212 | if (IS_ERR(rdev[i])) { |
1213 | ret = PTR_ERR(rdev[i]); | |
1214 | dev_err(max8997->dev, "regulator init failed for %d\n", | |
1215 | id); | |
1216 | rdev[i] = NULL; | |
1217 | goto err; | |
1218 | } | |
1219 | } | |
1220 | ||
bd6ca2cf MH |
1221 | return 0; |
1222 | err: | |
8ae5767b AL |
1223 | while (--i >= 0) |
1224 | regulator_unregister(rdev[i]); | |
1225 | err_out: | |
bd6ca2cf MH |
1226 | return ret; |
1227 | } | |
1228 | ||
8dc995f5 | 1229 | static int max8997_pmic_remove(struct platform_device *pdev) |
bd6ca2cf MH |
1230 | { |
1231 | struct max8997_data *max8997 = platform_get_drvdata(pdev); | |
1232 | struct regulator_dev **rdev = max8997->rdev; | |
1233 | int i; | |
1234 | ||
1235 | for (i = 0; i < max8997->num_regulators; i++) | |
8ae5767b | 1236 | regulator_unregister(rdev[i]); |
bd6ca2cf MH |
1237 | return 0; |
1238 | } | |
1239 | ||
1240 | static const struct platform_device_id max8997_pmic_id[] = { | |
1241 | { "max8997-pmic", 0}, | |
1242 | { }, | |
1243 | }; | |
a51b907b | 1244 | MODULE_DEVICE_TABLE(platform, max8997_pmic_id); |
bd6ca2cf MH |
1245 | |
1246 | static struct platform_driver max8997_pmic_driver = { | |
1247 | .driver = { | |
1248 | .name = "max8997-pmic", | |
1249 | .owner = THIS_MODULE, | |
1250 | }, | |
1251 | .probe = max8997_pmic_probe, | |
5eb9f2b9 | 1252 | .remove = max8997_pmic_remove, |
bd6ca2cf MH |
1253 | .id_table = max8997_pmic_id, |
1254 | }; | |
1255 | ||
1256 | static int __init max8997_pmic_init(void) | |
1257 | { | |
1258 | return platform_driver_register(&max8997_pmic_driver); | |
1259 | } | |
1260 | subsys_initcall(max8997_pmic_init); | |
1261 | ||
1262 | static void __exit max8997_pmic_cleanup(void) | |
1263 | { | |
1264 | platform_driver_unregister(&max8997_pmic_driver); | |
1265 | } | |
1266 | module_exit(max8997_pmic_cleanup); | |
1267 | ||
1268 | MODULE_DESCRIPTION("MAXIM 8997/8966 Regulator Driver"); | |
1269 | MODULE_AUTHOR("MyungJoo Ham <myungjoo.ham@samsung.com>"); | |
1270 | MODULE_LICENSE("GPL"); |