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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 | ||
57 | static inline void max8997_set_gpio(struct max8997_data *max8997) | |
58 | { | |
bd6ca2cf MH |
59 | int set3 = (max8997->buck125_gpioindex) & 0x1; |
60 | int set2 = ((max8997->buck125_gpioindex) >> 1) & 0x1; | |
61 | int set1 = ((max8997->buck125_gpioindex) >> 2) & 0x1; | |
62 | ||
6e0414a5 MH |
63 | gpio_set_value(max8997->buck125_gpios[0], set1); |
64 | gpio_set_value(max8997->buck125_gpios[1], set2); | |
65 | gpio_set_value(max8997->buck125_gpios[2], set3); | |
bd6ca2cf MH |
66 | } |
67 | ||
68 | struct voltage_map_desc { | |
69 | int min; | |
70 | int max; | |
71 | int step; | |
bd6ca2cf MH |
72 | }; |
73 | ||
74 | /* Voltage maps in mV */ | |
75 | static const struct voltage_map_desc ldo_voltage_map_desc = { | |
0fa310cc | 76 | .min = 800, .max = 3950, .step = 50, |
bd6ca2cf MH |
77 | }; /* LDO1 ~ 18, 21 all */ |
78 | ||
79 | static const struct voltage_map_desc buck1245_voltage_map_desc = { | |
0fa310cc | 80 | .min = 650, .max = 2225, .step = 25, |
bd6ca2cf MH |
81 | }; /* Buck1, 2, 4, 5 */ |
82 | ||
83 | static const struct voltage_map_desc buck37_voltage_map_desc = { | |
0fa310cc | 84 | .min = 750, .max = 3900, .step = 50, |
bd6ca2cf MH |
85 | }; /* Buck3, 7 */ |
86 | ||
87 | /* current map in mA */ | |
88 | static const struct voltage_map_desc charger_current_map_desc = { | |
0fa310cc | 89 | .min = 200, .max = 950, .step = 50, |
bd6ca2cf MH |
90 | }; |
91 | ||
92 | static const struct voltage_map_desc topoff_current_map_desc = { | |
0fa310cc | 93 | .min = 50, .max = 200, .step = 10, |
bd6ca2cf MH |
94 | }; |
95 | ||
96 | static const struct voltage_map_desc *reg_voltage_map[] = { | |
97 | [MAX8997_LDO1] = &ldo_voltage_map_desc, | |
98 | [MAX8997_LDO2] = &ldo_voltage_map_desc, | |
99 | [MAX8997_LDO3] = &ldo_voltage_map_desc, | |
100 | [MAX8997_LDO4] = &ldo_voltage_map_desc, | |
101 | [MAX8997_LDO5] = &ldo_voltage_map_desc, | |
102 | [MAX8997_LDO6] = &ldo_voltage_map_desc, | |
103 | [MAX8997_LDO7] = &ldo_voltage_map_desc, | |
104 | [MAX8997_LDO8] = &ldo_voltage_map_desc, | |
105 | [MAX8997_LDO9] = &ldo_voltage_map_desc, | |
106 | [MAX8997_LDO10] = &ldo_voltage_map_desc, | |
107 | [MAX8997_LDO11] = &ldo_voltage_map_desc, | |
108 | [MAX8997_LDO12] = &ldo_voltage_map_desc, | |
109 | [MAX8997_LDO13] = &ldo_voltage_map_desc, | |
110 | [MAX8997_LDO14] = &ldo_voltage_map_desc, | |
111 | [MAX8997_LDO15] = &ldo_voltage_map_desc, | |
112 | [MAX8997_LDO16] = &ldo_voltage_map_desc, | |
113 | [MAX8997_LDO17] = &ldo_voltage_map_desc, | |
114 | [MAX8997_LDO18] = &ldo_voltage_map_desc, | |
115 | [MAX8997_LDO21] = &ldo_voltage_map_desc, | |
116 | [MAX8997_BUCK1] = &buck1245_voltage_map_desc, | |
117 | [MAX8997_BUCK2] = &buck1245_voltage_map_desc, | |
118 | [MAX8997_BUCK3] = &buck37_voltage_map_desc, | |
119 | [MAX8997_BUCK4] = &buck1245_voltage_map_desc, | |
120 | [MAX8997_BUCK5] = &buck1245_voltage_map_desc, | |
121 | [MAX8997_BUCK6] = NULL, | |
122 | [MAX8997_BUCK7] = &buck37_voltage_map_desc, | |
123 | [MAX8997_EN32KHZ_AP] = NULL, | |
124 | [MAX8997_EN32KHZ_CP] = NULL, | |
125 | [MAX8997_ENVICHG] = NULL, | |
126 | [MAX8997_ESAFEOUT1] = NULL, | |
127 | [MAX8997_ESAFEOUT2] = NULL, | |
128 | [MAX8997_CHARGER_CV] = NULL, | |
129 | [MAX8997_CHARGER] = &charger_current_map_desc, | |
130 | [MAX8997_CHARGER_TOPOFF] = &topoff_current_map_desc, | |
131 | }; | |
132 | ||
bd6ca2cf MH |
133 | static int max8997_list_voltage_safeout(struct regulator_dev *rdev, |
134 | unsigned int selector) | |
135 | { | |
b3e1348e | 136 | int rid = rdev_get_id(rdev); |
bd6ca2cf MH |
137 | |
138 | if (rid == MAX8997_ESAFEOUT1 || rid == MAX8997_ESAFEOUT2) { | |
139 | switch (selector) { | |
140 | case 0: | |
141 | return 4850000; | |
142 | case 1: | |
143 | return 4900000; | |
144 | case 2: | |
145 | return 4950000; | |
146 | case 3: | |
147 | return 3300000; | |
148 | default: | |
149 | return -EINVAL; | |
150 | } | |
151 | } | |
152 | ||
153 | return -EINVAL; | |
154 | } | |
155 | ||
156 | static int max8997_list_voltage_charger_cv(struct regulator_dev *rdev, | |
157 | unsigned int selector) | |
158 | { | |
b3e1348e | 159 | int rid = rdev_get_id(rdev); |
bd6ca2cf MH |
160 | |
161 | if (rid != MAX8997_CHARGER_CV) | |
162 | goto err; | |
163 | ||
164 | switch (selector) { | |
165 | case 0x00: | |
166 | return 4200000; | |
167 | case 0x01 ... 0x0E: | |
168 | return 4000000 + 20000 * (selector - 0x01); | |
169 | case 0x0F: | |
170 | return 4350000; | |
171 | default: | |
172 | return -EINVAL; | |
173 | } | |
174 | err: | |
175 | return -EINVAL; | |
176 | } | |
177 | ||
178 | static int max8997_list_voltage(struct regulator_dev *rdev, | |
179 | unsigned int selector) | |
180 | { | |
181 | const struct voltage_map_desc *desc; | |
b3e1348e | 182 | int rid = rdev_get_id(rdev); |
bd6ca2cf MH |
183 | int val; |
184 | ||
185 | if (rid >= ARRAY_SIZE(reg_voltage_map) || | |
186 | rid < 0) | |
187 | return -EINVAL; | |
188 | ||
189 | desc = reg_voltage_map[rid]; | |
190 | if (desc == NULL) | |
191 | return -EINVAL; | |
192 | ||
193 | val = desc->min + desc->step * selector; | |
194 | if (val > desc->max) | |
195 | return -EINVAL; | |
196 | ||
197 | return val * 1000; | |
198 | } | |
199 | ||
200 | static int max8997_get_enable_register(struct regulator_dev *rdev, | |
201 | int *reg, int *mask, int *pattern) | |
202 | { | |
b3e1348e | 203 | int rid = rdev_get_id(rdev); |
bd6ca2cf MH |
204 | |
205 | switch (rid) { | |
206 | case MAX8997_LDO1 ... MAX8997_LDO21: | |
207 | *reg = MAX8997_REG_LDO1CTRL + (rid - MAX8997_LDO1); | |
208 | *mask = 0xC0; | |
209 | *pattern = 0xC0; | |
210 | break; | |
211 | case MAX8997_BUCK1: | |
212 | *reg = MAX8997_REG_BUCK1CTRL; | |
213 | *mask = 0x01; | |
214 | *pattern = 0x01; | |
215 | break; | |
216 | case MAX8997_BUCK2: | |
217 | *reg = MAX8997_REG_BUCK2CTRL; | |
218 | *mask = 0x01; | |
219 | *pattern = 0x01; | |
220 | break; | |
221 | case MAX8997_BUCK3: | |
222 | *reg = MAX8997_REG_BUCK3CTRL; | |
223 | *mask = 0x01; | |
224 | *pattern = 0x01; | |
225 | break; | |
226 | case MAX8997_BUCK4: | |
227 | *reg = MAX8997_REG_BUCK4CTRL; | |
228 | *mask = 0x01; | |
229 | *pattern = 0x01; | |
230 | break; | |
231 | case MAX8997_BUCK5: | |
232 | *reg = MAX8997_REG_BUCK5CTRL; | |
233 | *mask = 0x01; | |
234 | *pattern = 0x01; | |
235 | break; | |
236 | case MAX8997_BUCK6: | |
237 | *reg = MAX8997_REG_BUCK6CTRL; | |
238 | *mask = 0x01; | |
239 | *pattern = 0x01; | |
240 | break; | |
241 | case MAX8997_BUCK7: | |
242 | *reg = MAX8997_REG_BUCK7CTRL; | |
243 | *mask = 0x01; | |
244 | *pattern = 0x01; | |
245 | break; | |
246 | case MAX8997_EN32KHZ_AP ... MAX8997_EN32KHZ_CP: | |
247 | *reg = MAX8997_REG_MAINCON1; | |
248 | *mask = 0x01 << (rid - MAX8997_EN32KHZ_AP); | |
249 | *pattern = 0x01 << (rid - MAX8997_EN32KHZ_AP); | |
250 | break; | |
251 | case MAX8997_ENVICHG: | |
252 | *reg = MAX8997_REG_MBCCTRL1; | |
253 | *mask = 0x80; | |
254 | *pattern = 0x80; | |
255 | break; | |
256 | case MAX8997_ESAFEOUT1 ... MAX8997_ESAFEOUT2: | |
257 | *reg = MAX8997_REG_SAFEOUTCTRL; | |
258 | *mask = 0x40 << (rid - MAX8997_ESAFEOUT1); | |
259 | *pattern = 0x40 << (rid - MAX8997_ESAFEOUT1); | |
260 | break; | |
261 | case MAX8997_CHARGER: | |
262 | *reg = MAX8997_REG_MBCCTRL2; | |
263 | *mask = 0x40; | |
264 | *pattern = 0x40; | |
265 | break; | |
266 | default: | |
267 | /* Not controllable or not exists */ | |
268 | return -EINVAL; | |
bd6ca2cf MH |
269 | } |
270 | ||
271 | return 0; | |
272 | } | |
273 | ||
274 | static int max8997_reg_is_enabled(struct regulator_dev *rdev) | |
275 | { | |
276 | struct max8997_data *max8997 = rdev_get_drvdata(rdev); | |
277 | struct i2c_client *i2c = max8997->iodev->i2c; | |
278 | int ret, reg, mask, pattern; | |
279 | u8 val; | |
280 | ||
281 | ret = max8997_get_enable_register(rdev, ®, &mask, &pattern); | |
c245c087 | 282 | if (ret) |
bd6ca2cf MH |
283 | return ret; |
284 | ||
285 | ret = max8997_read_reg(i2c, reg, &val); | |
286 | if (ret) | |
287 | return ret; | |
288 | ||
289 | return (val & mask) == pattern; | |
290 | } | |
291 | ||
292 | static int max8997_reg_enable(struct regulator_dev *rdev) | |
293 | { | |
294 | struct max8997_data *max8997 = rdev_get_drvdata(rdev); | |
295 | struct i2c_client *i2c = max8997->iodev->i2c; | |
296 | int ret, reg, mask, pattern; | |
297 | ||
298 | ret = max8997_get_enable_register(rdev, ®, &mask, &pattern); | |
299 | if (ret) | |
300 | return ret; | |
301 | ||
302 | return max8997_update_reg(i2c, reg, pattern, mask); | |
303 | } | |
304 | ||
305 | static int max8997_reg_disable(struct regulator_dev *rdev) | |
306 | { | |
307 | struct max8997_data *max8997 = rdev_get_drvdata(rdev); | |
308 | struct i2c_client *i2c = max8997->iodev->i2c; | |
309 | int ret, reg, mask, pattern; | |
310 | ||
311 | ret = max8997_get_enable_register(rdev, ®, &mask, &pattern); | |
312 | if (ret) | |
313 | return ret; | |
314 | ||
315 | return max8997_update_reg(i2c, reg, ~pattern, mask); | |
316 | } | |
317 | ||
318 | static int max8997_get_voltage_register(struct regulator_dev *rdev, | |
319 | int *_reg, int *_shift, int *_mask) | |
320 | { | |
6f43c380 | 321 | struct max8997_data *max8997 = rdev_get_drvdata(rdev); |
b3e1348e | 322 | int rid = rdev_get_id(rdev); |
bd6ca2cf MH |
323 | int reg, shift = 0, mask = 0x3f; |
324 | ||
325 | switch (rid) { | |
326 | case MAX8997_LDO1 ... MAX8997_LDO21: | |
327 | reg = MAX8997_REG_LDO1CTRL + (rid - MAX8997_LDO1); | |
328 | break; | |
329 | case MAX8997_BUCK1: | |
330 | reg = MAX8997_REG_BUCK1DVS1; | |
6f43c380 AL |
331 | if (max8997->buck1_gpiodvs) |
332 | reg += max8997->buck125_gpioindex; | |
bd6ca2cf MH |
333 | break; |
334 | case MAX8997_BUCK2: | |
335 | reg = MAX8997_REG_BUCK2DVS1; | |
6f43c380 AL |
336 | if (max8997->buck2_gpiodvs) |
337 | reg += max8997->buck125_gpioindex; | |
bd6ca2cf MH |
338 | break; |
339 | case MAX8997_BUCK3: | |
340 | reg = MAX8997_REG_BUCK3DVS; | |
341 | break; | |
342 | case MAX8997_BUCK4: | |
343 | reg = MAX8997_REG_BUCK4DVS; | |
344 | break; | |
345 | case MAX8997_BUCK5: | |
346 | reg = MAX8997_REG_BUCK5DVS1; | |
6f43c380 AL |
347 | if (max8997->buck5_gpiodvs) |
348 | reg += max8997->buck125_gpioindex; | |
bd6ca2cf MH |
349 | break; |
350 | case MAX8997_BUCK7: | |
351 | reg = MAX8997_REG_BUCK7DVS; | |
352 | break; | |
353 | case MAX8997_ESAFEOUT1 ... MAX8997_ESAFEOUT2: | |
354 | reg = MAX8997_REG_SAFEOUTCTRL; | |
355 | shift = (rid == MAX8997_ESAFEOUT2) ? 2 : 0; | |
356 | mask = 0x3; | |
357 | break; | |
358 | case MAX8997_CHARGER_CV: | |
359 | reg = MAX8997_REG_MBCCTRL3; | |
360 | shift = 0; | |
361 | mask = 0xf; | |
362 | break; | |
363 | case MAX8997_CHARGER: | |
364 | reg = MAX8997_REG_MBCCTRL4; | |
365 | shift = 0; | |
366 | mask = 0xf; | |
367 | break; | |
368 | case MAX8997_CHARGER_TOPOFF: | |
369 | reg = MAX8997_REG_MBCCTRL5; | |
370 | shift = 0; | |
371 | mask = 0xf; | |
372 | break; | |
373 | default: | |
374 | return -EINVAL; | |
375 | } | |
376 | ||
377 | *_reg = reg; | |
378 | *_shift = shift; | |
379 | *_mask = mask; | |
380 | ||
381 | return 0; | |
382 | } | |
383 | ||
9e96b3a7 | 384 | static int max8997_get_voltage_sel(struct regulator_dev *rdev) |
bd6ca2cf MH |
385 | { |
386 | struct max8997_data *max8997 = rdev_get_drvdata(rdev); | |
bd6ca2cf MH |
387 | struct i2c_client *i2c = max8997->iodev->i2c; |
388 | int reg, shift, mask, ret; | |
bd6ca2cf MH |
389 | u8 val; |
390 | ||
391 | ret = max8997_get_voltage_register(rdev, ®, &shift, &mask); | |
392 | if (ret) | |
393 | return ret; | |
394 | ||
bd6ca2cf MH |
395 | ret = max8997_read_reg(i2c, reg, &val); |
396 | if (ret) | |
397 | return ret; | |
398 | ||
399 | val >>= shift; | |
400 | val &= mask; | |
401 | ||
9e96b3a7 | 402 | return val; |
bd6ca2cf MH |
403 | } |
404 | ||
405 | static inline int max8997_get_voltage_proper_val( | |
406 | const struct voltage_map_desc *desc, | |
407 | int min_vol, int max_vol) | |
408 | { | |
2358b776 | 409 | int i; |
bd6ca2cf MH |
410 | |
411 | if (desc == NULL) | |
412 | return -EINVAL; | |
413 | ||
414 | if (max_vol < desc->min || min_vol > desc->max) | |
415 | return -EINVAL; | |
416 | ||
2358b776 AL |
417 | if (min_vol < desc->min) |
418 | min_vol = desc->min; | |
bd6ca2cf | 419 | |
2358b776 | 420 | i = DIV_ROUND_UP(min_vol - desc->min, desc->step); |
bd6ca2cf | 421 | |
bd6ca2cf | 422 | if (desc->min + desc->step * i > max_vol) |
bd6ca2cf MH |
423 | return -EINVAL; |
424 | ||
425 | return i; | |
426 | } | |
427 | ||
428 | static int max8997_set_voltage_charger_cv(struct regulator_dev *rdev, | |
429 | int min_uV, int max_uV, unsigned *selector) | |
430 | { | |
431 | struct max8997_data *max8997 = rdev_get_drvdata(rdev); | |
432 | struct i2c_client *i2c = max8997->iodev->i2c; | |
b3e1348e | 433 | int rid = rdev_get_id(rdev); |
bd6ca2cf MH |
434 | int lb, ub; |
435 | int reg, shift = 0, mask, ret = 0; | |
436 | u8 val = 0x0; | |
437 | ||
438 | if (rid != MAX8997_CHARGER_CV) | |
439 | return -EINVAL; | |
440 | ||
441 | ret = max8997_get_voltage_register(rdev, ®, &shift, &mask); | |
442 | if (ret) | |
443 | return ret; | |
444 | ||
445 | if (max_uV < 4000000 || min_uV > 4350000) | |
446 | return -EINVAL; | |
447 | ||
448 | if (min_uV <= 4000000) { | |
449 | if (max_uV >= 4000000) | |
450 | return -EINVAL; | |
451 | else | |
452 | val = 0x1; | |
453 | } else if (min_uV <= 4200000 && max_uV >= 4200000) | |
454 | val = 0x0; | |
455 | else { | |
456 | lb = (min_uV - 4000001) / 20000 + 2; | |
457 | ub = (max_uV - 4000000) / 20000 + 1; | |
458 | ||
459 | if (lb > ub) | |
460 | return -EINVAL; | |
461 | ||
462 | if (lb < 0xf) | |
463 | val = lb; | |
464 | else { | |
465 | if (ub >= 0xf) | |
466 | val = 0xf; | |
467 | else | |
468 | return -EINVAL; | |
469 | } | |
470 | } | |
471 | ||
472 | *selector = val; | |
473 | ||
474 | ret = max8997_update_reg(i2c, reg, val << shift, mask); | |
475 | ||
476 | return ret; | |
477 | } | |
478 | ||
479 | /* | |
480 | * For LDO1 ~ LDO21, BUCK1~5, BUCK7, CHARGER, CHARGER_TOPOFF | |
481 | * BUCK1, 2, and 5 are available if they are not controlled by gpio | |
482 | */ | |
483 | static int max8997_set_voltage_ldobuck(struct regulator_dev *rdev, | |
484 | int min_uV, int max_uV, unsigned *selector) | |
485 | { | |
486 | struct max8997_data *max8997 = rdev_get_drvdata(rdev); | |
487 | struct i2c_client *i2c = max8997->iodev->i2c; | |
488 | int min_vol = min_uV / 1000, max_vol = max_uV / 1000; | |
489 | const struct voltage_map_desc *desc; | |
b3e1348e | 490 | int rid = rdev_get_id(rdev); |
62bc4d4a | 491 | int i, reg, shift, mask, ret; |
bd6ca2cf MH |
492 | |
493 | switch (rid) { | |
494 | case MAX8997_LDO1 ... MAX8997_LDO21: | |
495 | break; | |
496 | case MAX8997_BUCK1 ... MAX8997_BUCK5: | |
497 | break; | |
498 | case MAX8997_BUCK6: | |
499 | return -EINVAL; | |
500 | case MAX8997_BUCK7: | |
501 | break; | |
502 | case MAX8997_CHARGER: | |
503 | break; | |
504 | case MAX8997_CHARGER_TOPOFF: | |
505 | break; | |
506 | default: | |
507 | return -EINVAL; | |
508 | } | |
509 | ||
510 | desc = reg_voltage_map[rid]; | |
511 | ||
512 | i = max8997_get_voltage_proper_val(desc, min_vol, max_vol); | |
513 | if (i < 0) | |
514 | return i; | |
515 | ||
516 | ret = max8997_get_voltage_register(rdev, ®, &shift, &mask); | |
517 | if (ret) | |
518 | return ret; | |
519 | ||
bd6ca2cf MH |
520 | ret = max8997_update_reg(i2c, reg, i << shift, mask << shift); |
521 | *selector = i; | |
522 | ||
62bc4d4a AL |
523 | return ret; |
524 | } | |
525 | ||
526 | static int max8997_set_voltage_ldobuck_time_sel(struct regulator_dev *rdev, | |
527 | unsigned int old_selector, | |
528 | unsigned int new_selector) | |
529 | { | |
530 | struct max8997_data *max8997 = rdev_get_drvdata(rdev); | |
531 | int rid = rdev_get_id(rdev); | |
532 | const struct voltage_map_desc *desc = reg_voltage_map[rid]; | |
533 | ||
534 | /* Delay is required only if the voltage is increasing */ | |
535 | if (old_selector >= new_selector) | |
536 | return 0; | |
537 | ||
538 | /* No need to delay if gpio_dvs_mode */ | |
539 | switch (rid) { | |
540 | case MAX8997_BUCK1: | |
541 | if (max8997->buck1_gpiodvs) | |
542 | return 0; | |
543 | break; | |
544 | case MAX8997_BUCK2: | |
545 | if (max8997->buck2_gpiodvs) | |
546 | return 0; | |
547 | break; | |
548 | case MAX8997_BUCK5: | |
549 | if (max8997->buck5_gpiodvs) | |
550 | return 0; | |
551 | break; | |
bd6ca2cf MH |
552 | } |
553 | ||
62bc4d4a AL |
554 | switch (rid) { |
555 | case MAX8997_BUCK1: | |
556 | case MAX8997_BUCK2: | |
557 | case MAX8997_BUCK4: | |
558 | case MAX8997_BUCK5: | |
559 | return DIV_ROUND_UP(desc->step * (new_selector - old_selector), | |
560 | max8997->ramp_delay); | |
bd6ca2cf MH |
561 | } |
562 | ||
62bc4d4a | 563 | return 0; |
bd6ca2cf MH |
564 | } |
565 | ||
566 | /* | |
567 | * Assess the damage on the voltage setting of BUCK1,2,5 by the change. | |
568 | * | |
569 | * When GPIO-DVS mode is used for multiple bucks, changing the voltage value | |
570 | * of one of the bucks may affect that of another buck, which is the side | |
571 | * effect of the change (set_voltage). This function examines the GPIO-DVS | |
572 | * configurations and checks whether such side-effect exists. | |
573 | */ | |
574 | static int max8997_assess_side_effect(struct regulator_dev *rdev, | |
575 | u8 new_val, int *best) | |
576 | { | |
577 | struct max8997_data *max8997 = rdev_get_drvdata(rdev); | |
b3e1348e | 578 | int rid = rdev_get_id(rdev); |
bd6ca2cf MH |
579 | u8 *buckx_val[3]; |
580 | bool buckx_gpiodvs[3]; | |
581 | int side_effect[8]; | |
582 | int min_side_effect = INT_MAX; | |
583 | int i; | |
584 | ||
585 | *best = -1; | |
586 | ||
587 | switch (rid) { | |
588 | case MAX8997_BUCK1: | |
589 | rid = 0; | |
590 | break; | |
591 | case MAX8997_BUCK2: | |
592 | rid = 1; | |
593 | break; | |
594 | case MAX8997_BUCK5: | |
595 | rid = 2; | |
596 | break; | |
597 | default: | |
598 | return -EINVAL; | |
599 | } | |
600 | ||
601 | buckx_val[0] = max8997->buck1_vol; | |
602 | buckx_val[1] = max8997->buck2_vol; | |
603 | buckx_val[2] = max8997->buck5_vol; | |
6e0414a5 MH |
604 | buckx_gpiodvs[0] = max8997->buck1_gpiodvs; |
605 | buckx_gpiodvs[1] = max8997->buck2_gpiodvs; | |
606 | buckx_gpiodvs[2] = max8997->buck5_gpiodvs; | |
bd6ca2cf MH |
607 | |
608 | for (i = 0; i < 8; i++) { | |
609 | int others; | |
610 | ||
611 | if (new_val != (buckx_val[rid])[i]) { | |
612 | side_effect[i] = -1; | |
613 | continue; | |
614 | } | |
615 | ||
616 | side_effect[i] = 0; | |
617 | for (others = 0; others < 3; others++) { | |
618 | int diff; | |
619 | ||
620 | if (others == rid) | |
621 | continue; | |
622 | if (buckx_gpiodvs[others] == false) | |
623 | continue; /* Not affected */ | |
624 | diff = (buckx_val[others])[i] - | |
625 | (buckx_val[others])[max8997->buck125_gpioindex]; | |
626 | if (diff > 0) | |
627 | side_effect[i] += diff; | |
628 | else if (diff < 0) | |
629 | side_effect[i] -= diff; | |
630 | } | |
631 | if (side_effect[i] == 0) { | |
632 | *best = i; | |
633 | return 0; /* NO SIDE EFFECT! Use This! */ | |
634 | } | |
635 | if (side_effect[i] < min_side_effect) { | |
636 | min_side_effect = side_effect[i]; | |
637 | *best = i; | |
638 | } | |
639 | } | |
640 | ||
641 | if (*best == -1) | |
642 | return -EINVAL; | |
643 | ||
644 | return side_effect[*best]; | |
645 | } | |
646 | ||
647 | /* | |
648 | * For Buck 1 ~ 5 and 7. If it is not controlled by GPIO, this calls | |
649 | * max8997_set_voltage_ldobuck to do the job. | |
650 | */ | |
651 | static int max8997_set_voltage_buck(struct regulator_dev *rdev, | |
652 | int min_uV, int max_uV, unsigned *selector) | |
653 | { | |
654 | struct max8997_data *max8997 = rdev_get_drvdata(rdev); | |
b3e1348e | 655 | int rid = rdev_get_id(rdev); |
bd6ca2cf MH |
656 | const struct voltage_map_desc *desc; |
657 | int new_val, new_idx, damage, tmp_val, tmp_idx, tmp_dmg; | |
658 | bool gpio_dvs_mode = false; | |
659 | int min_vol = min_uV / 1000, max_vol = max_uV / 1000; | |
660 | ||
661 | if (rid < MAX8997_BUCK1 || rid > MAX8997_BUCK7) | |
662 | return -EINVAL; | |
663 | ||
664 | switch (rid) { | |
665 | case MAX8997_BUCK1: | |
6e0414a5 | 666 | if (max8997->buck1_gpiodvs) |
bd6ca2cf MH |
667 | gpio_dvs_mode = true; |
668 | break; | |
669 | case MAX8997_BUCK2: | |
6e0414a5 | 670 | if (max8997->buck2_gpiodvs) |
bd6ca2cf MH |
671 | gpio_dvs_mode = true; |
672 | break; | |
673 | case MAX8997_BUCK5: | |
6e0414a5 | 674 | if (max8997->buck5_gpiodvs) |
bd6ca2cf MH |
675 | gpio_dvs_mode = true; |
676 | break; | |
677 | } | |
678 | ||
679 | if (!gpio_dvs_mode) | |
680 | return max8997_set_voltage_ldobuck(rdev, min_uV, max_uV, | |
681 | selector); | |
682 | ||
683 | desc = reg_voltage_map[rid]; | |
684 | new_val = max8997_get_voltage_proper_val(desc, min_vol, max_vol); | |
685 | if (new_val < 0) | |
686 | return new_val; | |
687 | ||
688 | tmp_dmg = INT_MAX; | |
689 | tmp_idx = -1; | |
690 | tmp_val = -1; | |
691 | do { | |
692 | damage = max8997_assess_side_effect(rdev, new_val, &new_idx); | |
693 | if (damage == 0) | |
694 | goto out; | |
695 | ||
696 | if (tmp_dmg > damage) { | |
697 | tmp_idx = new_idx; | |
698 | tmp_val = new_val; | |
699 | tmp_dmg = damage; | |
700 | } | |
701 | ||
702 | new_val++; | |
f55205f4 | 703 | } while (desc->min + desc->step * new_val <= desc->max); |
bd6ca2cf MH |
704 | |
705 | new_idx = tmp_idx; | |
706 | new_val = tmp_val; | |
707 | ||
6e0414a5 | 708 | if (max8997->ignore_gpiodvs_side_effect == false) |
bd6ca2cf MH |
709 | return -EINVAL; |
710 | ||
711 | dev_warn(&rdev->dev, "MAX8997 GPIO-DVS Side Effect Warning: GPIO SET:" | |
712 | " %d -> %d\n", max8997->buck125_gpioindex, tmp_idx); | |
713 | ||
714 | out: | |
715 | if (new_idx < 0 || new_val < 0) | |
716 | return -EINVAL; | |
717 | ||
718 | max8997->buck125_gpioindex = new_idx; | |
719 | max8997_set_gpio(max8997); | |
720 | *selector = new_val; | |
721 | ||
722 | return 0; | |
723 | } | |
724 | ||
725 | static const int safeoutvolt[] = { | |
726 | 3300000, | |
727 | 4850000, | |
728 | 4900000, | |
729 | 4950000, | |
730 | }; | |
731 | ||
732 | /* For SAFEOUT1 and SAFEOUT2 */ | |
733 | static int max8997_set_voltage_safeout(struct regulator_dev *rdev, | |
734 | int min_uV, int max_uV, unsigned *selector) | |
735 | { | |
736 | struct max8997_data *max8997 = rdev_get_drvdata(rdev); | |
737 | struct i2c_client *i2c = max8997->iodev->i2c; | |
b3e1348e | 738 | int rid = rdev_get_id(rdev); |
bd6ca2cf MH |
739 | int reg, shift = 0, mask, ret; |
740 | int i = 0; | |
741 | u8 val; | |
742 | ||
743 | if (rid != MAX8997_ESAFEOUT1 && rid != MAX8997_ESAFEOUT2) | |
744 | return -EINVAL; | |
745 | ||
746 | for (i = 0; i < ARRAY_SIZE(safeoutvolt); i++) { | |
747 | if (min_uV <= safeoutvolt[i] && | |
748 | max_uV >= safeoutvolt[i]) | |
749 | break; | |
750 | } | |
751 | ||
752 | if (i >= ARRAY_SIZE(safeoutvolt)) | |
753 | return -EINVAL; | |
754 | ||
755 | if (i == 0) | |
756 | val = 0x3; | |
757 | else | |
758 | val = i - 1; | |
759 | ||
760 | ret = max8997_get_voltage_register(rdev, ®, &shift, &mask); | |
761 | if (ret) | |
762 | return ret; | |
763 | ||
764 | ret = max8997_update_reg(i2c, reg, val << shift, mask << shift); | |
765 | *selector = val; | |
766 | ||
767 | return ret; | |
768 | } | |
769 | ||
bd6ca2cf MH |
770 | static int max8997_reg_disable_suspend(struct regulator_dev *rdev) |
771 | { | |
772 | struct max8997_data *max8997 = rdev_get_drvdata(rdev); | |
773 | struct i2c_client *i2c = max8997->iodev->i2c; | |
774 | int ret, reg, mask, pattern; | |
b3e1348e | 775 | int rid = rdev_get_id(rdev); |
bd6ca2cf MH |
776 | |
777 | ret = max8997_get_enable_register(rdev, ®, &mask, &pattern); | |
778 | if (ret) | |
779 | return ret; | |
780 | ||
781 | max8997_read_reg(i2c, reg, &max8997->saved_states[rid]); | |
782 | ||
783 | if (rid == MAX8997_LDO1 || | |
784 | rid == MAX8997_LDO10 || | |
785 | rid == MAX8997_LDO21) { | |
786 | dev_dbg(&rdev->dev, "Conditional Power-Off for %s\n", | |
787 | rdev->desc->name); | |
788 | return max8997_update_reg(i2c, reg, 0x40, mask); | |
789 | } | |
790 | ||
791 | dev_dbg(&rdev->dev, "Full Power-Off for %s (%xh -> %xh)\n", | |
792 | rdev->desc->name, max8997->saved_states[rid] & mask, | |
793 | (~pattern) & mask); | |
794 | return max8997_update_reg(i2c, reg, ~pattern, mask); | |
795 | } | |
796 | ||
797 | static struct regulator_ops max8997_ldo_ops = { | |
798 | .list_voltage = max8997_list_voltage, | |
799 | .is_enabled = max8997_reg_is_enabled, | |
800 | .enable = max8997_reg_enable, | |
801 | .disable = max8997_reg_disable, | |
9e96b3a7 | 802 | .get_voltage_sel = max8997_get_voltage_sel, |
bd6ca2cf | 803 | .set_voltage = max8997_set_voltage_ldobuck, |
62bc4d4a | 804 | .set_voltage_time_sel = max8997_set_voltage_ldobuck_time_sel, |
bd6ca2cf MH |
805 | .set_suspend_disable = max8997_reg_disable_suspend, |
806 | }; | |
807 | ||
808 | static struct regulator_ops max8997_buck_ops = { | |
809 | .list_voltage = max8997_list_voltage, | |
810 | .is_enabled = max8997_reg_is_enabled, | |
811 | .enable = max8997_reg_enable, | |
812 | .disable = max8997_reg_disable, | |
9e96b3a7 | 813 | .get_voltage_sel = max8997_get_voltage_sel, |
bd6ca2cf | 814 | .set_voltage = max8997_set_voltage_buck, |
62bc4d4a | 815 | .set_voltage_time_sel = max8997_set_voltage_ldobuck_time_sel, |
bd6ca2cf MH |
816 | .set_suspend_disable = max8997_reg_disable_suspend, |
817 | }; | |
818 | ||
819 | static struct regulator_ops max8997_fixedvolt_ops = { | |
820 | .list_voltage = max8997_list_voltage, | |
821 | .is_enabled = max8997_reg_is_enabled, | |
822 | .enable = max8997_reg_enable, | |
823 | .disable = max8997_reg_disable, | |
bd6ca2cf MH |
824 | .set_suspend_disable = max8997_reg_disable_suspend, |
825 | }; | |
826 | ||
827 | static struct regulator_ops max8997_safeout_ops = { | |
828 | .list_voltage = max8997_list_voltage_safeout, | |
829 | .is_enabled = max8997_reg_is_enabled, | |
830 | .enable = max8997_reg_enable, | |
831 | .disable = max8997_reg_disable, | |
9e96b3a7 | 832 | .get_voltage_sel = max8997_get_voltage_sel, |
bd6ca2cf | 833 | .set_voltage = max8997_set_voltage_safeout, |
bd6ca2cf MH |
834 | .set_suspend_disable = max8997_reg_disable_suspend, |
835 | }; | |
836 | ||
837 | static struct regulator_ops max8997_fixedstate_ops = { | |
838 | .list_voltage = max8997_list_voltage_charger_cv, | |
9e96b3a7 | 839 | .get_voltage_sel = max8997_get_voltage_sel, |
bd6ca2cf MH |
840 | .set_voltage = max8997_set_voltage_charger_cv, |
841 | }; | |
842 | ||
9e96b3a7 AL |
843 | static int max8997_set_current_limit(struct regulator_dev *rdev, |
844 | int min_uA, int max_uA) | |
bd6ca2cf MH |
845 | { |
846 | unsigned dummy; | |
9e96b3a7 | 847 | int rid = rdev_get_id(rdev); |
bd6ca2cf | 848 | |
9e96b3a7 AL |
849 | if (rid != MAX8997_CHARGER && rid != MAX8997_CHARGER_TOPOFF) |
850 | return -EINVAL; | |
bd6ca2cf | 851 | |
9e96b3a7 AL |
852 | /* Reuse max8997_set_voltage_ldobuck to set current_limit. */ |
853 | return max8997_set_voltage_ldobuck(rdev, min_uA, max_uA, &dummy); | |
bd6ca2cf MH |
854 | } |
855 | ||
9e96b3a7 AL |
856 | static int max8997_get_current_limit(struct regulator_dev *rdev) |
857 | { | |
858 | int sel, rid = rdev_get_id(rdev); | |
859 | ||
860 | if (rid != MAX8997_CHARGER && rid != MAX8997_CHARGER_TOPOFF) | |
861 | return -EINVAL; | |
862 | ||
863 | sel = max8997_get_voltage_sel(rdev); | |
864 | if (sel < 0) | |
865 | return sel; | |
866 | ||
867 | /* Reuse max8997_list_voltage to get current_limit. */ | |
868 | return max8997_list_voltage(rdev, sel); | |
869 | } | |
bd6ca2cf MH |
870 | |
871 | static struct regulator_ops max8997_charger_ops = { | |
872 | .is_enabled = max8997_reg_is_enabled, | |
873 | .enable = max8997_reg_enable, | |
874 | .disable = max8997_reg_disable, | |
9e96b3a7 AL |
875 | .get_current_limit = max8997_get_current_limit, |
876 | .set_current_limit = max8997_set_current_limit, | |
bd6ca2cf MH |
877 | }; |
878 | ||
879 | static struct regulator_ops max8997_charger_fixedstate_ops = { | |
9e96b3a7 AL |
880 | .get_current_limit = max8997_get_current_limit, |
881 | .set_current_limit = max8997_set_current_limit, | |
bd6ca2cf MH |
882 | }; |
883 | ||
4533f80e AL |
884 | #define MAX8997_VOLTAGE_REGULATOR(_name, _ops) {\ |
885 | .name = #_name, \ | |
886 | .id = MAX8997_##_name, \ | |
887 | .ops = &_ops, \ | |
bd6ca2cf MH |
888 | .type = REGULATOR_VOLTAGE, \ |
889 | .owner = THIS_MODULE, \ | |
890 | } | |
4533f80e AL |
891 | |
892 | #define MAX8997_CURRENT_REGULATOR(_name, _ops) {\ | |
893 | .name = #_name, \ | |
894 | .id = MAX8997_##_name, \ | |
895 | .ops = &_ops, \ | |
896 | .type = REGULATOR_CURRENT, \ | |
bd6ca2cf MH |
897 | .owner = THIS_MODULE, \ |
898 | } | |
899 | ||
900 | static struct regulator_desc regulators[] = { | |
4533f80e AL |
901 | MAX8997_VOLTAGE_REGULATOR(LDO1, max8997_ldo_ops), |
902 | MAX8997_VOLTAGE_REGULATOR(LDO2, max8997_ldo_ops), | |
903 | MAX8997_VOLTAGE_REGULATOR(LDO3, max8997_ldo_ops), | |
904 | MAX8997_VOLTAGE_REGULATOR(LDO4, max8997_ldo_ops), | |
905 | MAX8997_VOLTAGE_REGULATOR(LDO5, max8997_ldo_ops), | |
906 | MAX8997_VOLTAGE_REGULATOR(LDO6, max8997_ldo_ops), | |
907 | MAX8997_VOLTAGE_REGULATOR(LDO7, max8997_ldo_ops), | |
908 | MAX8997_VOLTAGE_REGULATOR(LDO8, max8997_ldo_ops), | |
909 | MAX8997_VOLTAGE_REGULATOR(LDO9, max8997_ldo_ops), | |
910 | MAX8997_VOLTAGE_REGULATOR(LDO10, max8997_ldo_ops), | |
911 | MAX8997_VOLTAGE_REGULATOR(LDO11, max8997_ldo_ops), | |
912 | MAX8997_VOLTAGE_REGULATOR(LDO12, max8997_ldo_ops), | |
913 | MAX8997_VOLTAGE_REGULATOR(LDO13, max8997_ldo_ops), | |
914 | MAX8997_VOLTAGE_REGULATOR(LDO14, max8997_ldo_ops), | |
915 | MAX8997_VOLTAGE_REGULATOR(LDO15, max8997_ldo_ops), | |
916 | MAX8997_VOLTAGE_REGULATOR(LDO16, max8997_ldo_ops), | |
917 | MAX8997_VOLTAGE_REGULATOR(LDO17, max8997_ldo_ops), | |
918 | MAX8997_VOLTAGE_REGULATOR(LDO18, max8997_ldo_ops), | |
919 | MAX8997_VOLTAGE_REGULATOR(LDO21, max8997_ldo_ops), | |
920 | MAX8997_VOLTAGE_REGULATOR(BUCK1, max8997_buck_ops), | |
921 | MAX8997_VOLTAGE_REGULATOR(BUCK2, max8997_buck_ops), | |
922 | MAX8997_VOLTAGE_REGULATOR(BUCK3, max8997_buck_ops), | |
923 | MAX8997_VOLTAGE_REGULATOR(BUCK4, max8997_buck_ops), | |
924 | MAX8997_VOLTAGE_REGULATOR(BUCK5, max8997_buck_ops), | |
925 | MAX8997_VOLTAGE_REGULATOR(BUCK6, max8997_fixedvolt_ops), | |
926 | MAX8997_VOLTAGE_REGULATOR(BUCK7, max8997_buck_ops), | |
927 | MAX8997_VOLTAGE_REGULATOR(EN32KHZ_AP, max8997_fixedvolt_ops), | |
928 | MAX8997_VOLTAGE_REGULATOR(EN32KHZ_CP, max8997_fixedvolt_ops), | |
929 | MAX8997_VOLTAGE_REGULATOR(ENVICHG, max8997_fixedvolt_ops), | |
930 | MAX8997_VOLTAGE_REGULATOR(ESAFEOUT1, max8997_safeout_ops), | |
931 | MAX8997_VOLTAGE_REGULATOR(ESAFEOUT2, max8997_safeout_ops), | |
932 | MAX8997_VOLTAGE_REGULATOR(CHARGER_CV, max8997_fixedstate_ops), | |
933 | MAX8997_CURRENT_REGULATOR(CHARGER, max8997_charger_ops), | |
934 | MAX8997_CURRENT_REGULATOR(CHARGER_TOPOFF, | |
935 | max8997_charger_fixedstate_ops), | |
bd6ca2cf MH |
936 | }; |
937 | ||
77b71b37 TA |
938 | #ifdef CONFIG_OF |
939 | static int max8997_pmic_dt_parse_dvs_gpio(struct max8997_dev *iodev, | |
940 | struct max8997_platform_data *pdata, | |
941 | struct device_node *pmic_np) | |
942 | { | |
943 | int i, gpio; | |
944 | ||
945 | for (i = 0; i < 3; i++) { | |
946 | gpio = of_get_named_gpio(pmic_np, | |
947 | "max8997,pmic-buck125-dvs-gpios", i); | |
948 | if (!gpio_is_valid(gpio)) { | |
949 | dev_err(iodev->dev, "invalid gpio[%d]: %d\n", i, gpio); | |
950 | return -EINVAL; | |
951 | } | |
952 | pdata->buck125_gpios[i] = gpio; | |
953 | } | |
954 | return 0; | |
955 | } | |
956 | ||
957 | static int max8997_pmic_dt_parse_pdata(struct max8997_dev *iodev, | |
958 | struct max8997_platform_data *pdata) | |
959 | { | |
960 | struct device_node *pmic_np, *regulators_np, *reg_np; | |
961 | struct max8997_regulator_data *rdata; | |
962 | unsigned int i, dvs_voltage_nr = 1, ret; | |
963 | ||
964 | pmic_np = iodev->dev->of_node; | |
965 | if (!pmic_np) { | |
966 | dev_err(iodev->dev, "could not find pmic sub-node\n"); | |
967 | return -ENODEV; | |
968 | } | |
969 | ||
970 | regulators_np = of_find_node_by_name(pmic_np, "regulators"); | |
971 | if (!regulators_np) { | |
972 | dev_err(iodev->dev, "could not find regulators sub-node\n"); | |
973 | return -EINVAL; | |
974 | } | |
975 | ||
976 | /* count the number of regulators to be supported in pmic */ | |
977 | pdata->num_regulators = 0; | |
978 | for_each_child_of_node(regulators_np, reg_np) | |
979 | pdata->num_regulators++; | |
980 | ||
981 | rdata = devm_kzalloc(iodev->dev, sizeof(*rdata) * | |
982 | pdata->num_regulators, GFP_KERNEL); | |
983 | if (!rdata) { | |
984 | dev_err(iodev->dev, "could not allocate memory for " | |
985 | "regulator data\n"); | |
986 | return -ENOMEM; | |
987 | } | |
988 | ||
989 | pdata->regulators = rdata; | |
990 | for_each_child_of_node(regulators_np, reg_np) { | |
991 | for (i = 0; i < ARRAY_SIZE(regulators); i++) | |
992 | if (!of_node_cmp(reg_np->name, regulators[i].name)) | |
993 | break; | |
994 | ||
995 | if (i == ARRAY_SIZE(regulators)) { | |
996 | dev_warn(iodev->dev, "don't know how to configure " | |
997 | "regulator %s\n", reg_np->name); | |
998 | continue; | |
999 | } | |
1000 | ||
1001 | rdata->id = i; | |
1002 | rdata->initdata = of_get_regulator_init_data( | |
1003 | iodev->dev, reg_np); | |
1004 | rdata->reg_node = reg_np; | |
1005 | rdata++; | |
1006 | } | |
1007 | ||
1008 | if (of_get_property(pmic_np, "max8997,pmic-buck1-uses-gpio-dvs", NULL)) | |
1009 | pdata->buck1_gpiodvs = true; | |
1010 | ||
1011 | if (of_get_property(pmic_np, "max8997,pmic-buck2-uses-gpio-dvs", NULL)) | |
1012 | pdata->buck2_gpiodvs = true; | |
1013 | ||
1014 | if (of_get_property(pmic_np, "max8997,pmic-buck5-uses-gpio-dvs", NULL)) | |
1015 | pdata->buck5_gpiodvs = true; | |
1016 | ||
1017 | if (pdata->buck1_gpiodvs || pdata->buck2_gpiodvs || | |
1018 | pdata->buck5_gpiodvs) { | |
1019 | ret = max8997_pmic_dt_parse_dvs_gpio(iodev, pdata, pmic_np); | |
1020 | if (ret) | |
1021 | return -EINVAL; | |
1022 | ||
1023 | if (of_property_read_u32(pmic_np, | |
1024 | "max8997,pmic-buck125-default-dvs-idx", | |
1025 | &pdata->buck125_default_idx)) { | |
1026 | pdata->buck125_default_idx = 0; | |
1027 | } else { | |
1028 | if (pdata->buck125_default_idx >= 8) { | |
1029 | pdata->buck125_default_idx = 0; | |
1030 | dev_info(iodev->dev, "invalid value for " | |
1031 | "default dvs index, using 0 instead\n"); | |
1032 | } | |
1033 | } | |
1034 | ||
1035 | if (of_get_property(pmic_np, | |
1036 | "max8997,pmic-ignore-gpiodvs-side-effect", NULL)) | |
1037 | pdata->ignore_gpiodvs_side_effect = true; | |
1038 | ||
1039 | dvs_voltage_nr = 8; | |
1040 | } | |
1041 | ||
1042 | if (of_property_read_u32_array(pmic_np, | |
1043 | "max8997,pmic-buck1-dvs-voltage", | |
1044 | pdata->buck1_voltage, dvs_voltage_nr)) { | |
1045 | dev_err(iodev->dev, "buck1 voltages not specified\n"); | |
1046 | return -EINVAL; | |
1047 | } | |
1048 | ||
1049 | if (of_property_read_u32_array(pmic_np, | |
1050 | "max8997,pmic-buck2-dvs-voltage", | |
1051 | pdata->buck2_voltage, dvs_voltage_nr)) { | |
1052 | dev_err(iodev->dev, "buck2 voltages not specified\n"); | |
1053 | return -EINVAL; | |
1054 | } | |
1055 | ||
1056 | if (of_property_read_u32_array(pmic_np, | |
1057 | "max8997,pmic-buck5-dvs-voltage", | |
1058 | pdata->buck5_voltage, dvs_voltage_nr)) { | |
1059 | dev_err(iodev->dev, "buck5 voltages not specified\n"); | |
1060 | return -EINVAL; | |
1061 | } | |
1062 | ||
1063 | return 0; | |
1064 | } | |
1065 | #else | |
1066 | static int max8997_pmic_dt_parse_pdata(struct max8997_dev *iodev, | |
1067 | struct max8997_platform_data *pdata) | |
1068 | { | |
1069 | return 0; | |
1070 | } | |
1071 | #endif /* CONFIG_OF */ | |
1072 | ||
a5023574 | 1073 | static int max8997_pmic_probe(struct platform_device *pdev) |
bd6ca2cf MH |
1074 | { |
1075 | struct max8997_dev *iodev = dev_get_drvdata(pdev->dev.parent); | |
77b71b37 | 1076 | struct max8997_platform_data *pdata = iodev->pdata; |
c172708d | 1077 | struct regulator_config config = { }; |
bd6ca2cf MH |
1078 | struct regulator_dev **rdev; |
1079 | struct max8997_data *max8997; | |
1080 | struct i2c_client *i2c; | |
068a8c82 | 1081 | int i, ret, size, nr_dvs; |
bd6ca2cf MH |
1082 | u8 max_buck1 = 0, max_buck2 = 0, max_buck5 = 0; |
1083 | ||
77b71b37 | 1084 | if (IS_ERR_OR_NULL(pdata)) { |
bd6ca2cf MH |
1085 | dev_err(pdev->dev.parent, "No platform init data supplied.\n"); |
1086 | return -ENODEV; | |
1087 | } | |
1088 | ||
77b71b37 TA |
1089 | if (iodev->dev->of_node) { |
1090 | ret = max8997_pmic_dt_parse_pdata(iodev, pdata); | |
1091 | if (ret) | |
1092 | return ret; | |
1093 | } | |
1094 | ||
8ae5767b AL |
1095 | max8997 = devm_kzalloc(&pdev->dev, sizeof(struct max8997_data), |
1096 | GFP_KERNEL); | |
bd6ca2cf MH |
1097 | if (!max8997) |
1098 | return -ENOMEM; | |
1099 | ||
1100 | size = sizeof(struct regulator_dev *) * pdata->num_regulators; | |
8ae5767b AL |
1101 | max8997->rdev = devm_kzalloc(&pdev->dev, size, GFP_KERNEL); |
1102 | if (!max8997->rdev) | |
bd6ca2cf | 1103 | return -ENOMEM; |
bd6ca2cf MH |
1104 | |
1105 | rdev = max8997->rdev; | |
1106 | max8997->dev = &pdev->dev; | |
1107 | max8997->iodev = iodev; | |
1108 | max8997->num_regulators = pdata->num_regulators; | |
1109 | platform_set_drvdata(pdev, max8997); | |
1110 | i2c = max8997->iodev->i2c; | |
1111 | ||
1112 | max8997->buck125_gpioindex = pdata->buck125_default_idx; | |
6e0414a5 MH |
1113 | max8997->buck1_gpiodvs = pdata->buck1_gpiodvs; |
1114 | max8997->buck2_gpiodvs = pdata->buck2_gpiodvs; | |
1115 | max8997->buck5_gpiodvs = pdata->buck5_gpiodvs; | |
1116 | memcpy(max8997->buck125_gpios, pdata->buck125_gpios, sizeof(int) * 3); | |
1117 | max8997->ignore_gpiodvs_side_effect = pdata->ignore_gpiodvs_side_effect; | |
bd6ca2cf | 1118 | |
068a8c82 TA |
1119 | nr_dvs = (pdata->buck1_gpiodvs || pdata->buck2_gpiodvs || |
1120 | pdata->buck5_gpiodvs) ? 8 : 1; | |
1121 | ||
1122 | for (i = 0; i < nr_dvs; i++) { | |
bd6ca2cf MH |
1123 | max8997->buck1_vol[i] = ret = |
1124 | max8997_get_voltage_proper_val( | |
1125 | &buck1245_voltage_map_desc, | |
1126 | pdata->buck1_voltage[i] / 1000, | |
1127 | pdata->buck1_voltage[i] / 1000 + | |
1128 | buck1245_voltage_map_desc.step); | |
1129 | if (ret < 0) | |
8ae5767b | 1130 | goto err_out; |
bd6ca2cf MH |
1131 | |
1132 | max8997->buck2_vol[i] = ret = | |
1133 | max8997_get_voltage_proper_val( | |
1134 | &buck1245_voltage_map_desc, | |
1135 | pdata->buck2_voltage[i] / 1000, | |
1136 | pdata->buck2_voltage[i] / 1000 + | |
1137 | buck1245_voltage_map_desc.step); | |
1138 | if (ret < 0) | |
8ae5767b | 1139 | goto err_out; |
bd6ca2cf MH |
1140 | |
1141 | max8997->buck5_vol[i] = ret = | |
1142 | max8997_get_voltage_proper_val( | |
1143 | &buck1245_voltage_map_desc, | |
1144 | pdata->buck5_voltage[i] / 1000, | |
1145 | pdata->buck5_voltage[i] / 1000 + | |
1146 | buck1245_voltage_map_desc.step); | |
1147 | if (ret < 0) | |
8ae5767b | 1148 | goto err_out; |
bd6ca2cf MH |
1149 | |
1150 | if (max_buck1 < max8997->buck1_vol[i]) | |
1151 | max_buck1 = max8997->buck1_vol[i]; | |
1152 | if (max_buck2 < max8997->buck2_vol[i]) | |
1153 | max_buck2 = max8997->buck2_vol[i]; | |
1154 | if (max_buck5 < max8997->buck5_vol[i]) | |
1155 | max_buck5 = max8997->buck5_vol[i]; | |
1156 | } | |
1157 | ||
1158 | /* For the safety, set max voltage before setting up */ | |
1159 | for (i = 0; i < 8; i++) { | |
ecb9c4f5 | 1160 | max8997_update_reg(i2c, MAX8997_REG_BUCK1DVS1 + i, |
bd6ca2cf | 1161 | max_buck1, 0x3f); |
ecb9c4f5 | 1162 | max8997_update_reg(i2c, MAX8997_REG_BUCK2DVS1 + i, |
bd6ca2cf | 1163 | max_buck2, 0x3f); |
ecb9c4f5 | 1164 | max8997_update_reg(i2c, MAX8997_REG_BUCK5DVS1 + i, |
bd6ca2cf MH |
1165 | max_buck5, 0x3f); |
1166 | } | |
1167 | ||
11ec7bf0 | 1168 | /* Initialize all the DVS related BUCK registers */ |
068a8c82 | 1169 | for (i = 0; i < nr_dvs; i++) { |
11ec7bf0 TA |
1170 | max8997_update_reg(i2c, MAX8997_REG_BUCK1DVS1 + i, |
1171 | max8997->buck1_vol[i], | |
1172 | 0x3f); | |
1173 | max8997_update_reg(i2c, MAX8997_REG_BUCK2DVS1 + i, | |
1174 | max8997->buck2_vol[i], | |
1175 | 0x3f); | |
1176 | max8997_update_reg(i2c, MAX8997_REG_BUCK5DVS1 + i, | |
1177 | max8997->buck5_vol[i], | |
1178 | 0x3f); | |
1179 | } | |
1180 | ||
bd6ca2cf MH |
1181 | /* |
1182 | * If buck 1, 2, and 5 do not care DVS GPIO settings, ignore them. | |
1183 | * If at least one of them cares, set gpios. | |
1184 | */ | |
1185 | if (pdata->buck1_gpiodvs || pdata->buck2_gpiodvs || | |
1186 | pdata->buck5_gpiodvs) { | |
bd6ca2cf MH |
1187 | |
1188 | if (!gpio_is_valid(pdata->buck125_gpios[0]) || | |
1189 | !gpio_is_valid(pdata->buck125_gpios[1]) || | |
1190 | !gpio_is_valid(pdata->buck125_gpios[2])) { | |
1191 | dev_err(&pdev->dev, "GPIO NOT VALID\n"); | |
1192 | ret = -EINVAL; | |
8ae5767b | 1193 | goto err_out; |
bd6ca2cf MH |
1194 | } |
1195 | ||
8fa25eda AL |
1196 | ret = devm_gpio_request(&pdev->dev, pdata->buck125_gpios[0], |
1197 | "MAX8997 SET1"); | |
1198 | if (ret) | |
8ae5767b | 1199 | goto err_out; |
8fa25eda AL |
1200 | |
1201 | ret = devm_gpio_request(&pdev->dev, pdata->buck125_gpios[1], | |
1202 | "MAX8997 SET2"); | |
1203 | if (ret) | |
8ae5767b | 1204 | goto err_out; |
bd6ca2cf | 1205 | |
8fa25eda | 1206 | ret = devm_gpio_request(&pdev->dev, pdata->buck125_gpios[2], |
bd6ca2cf | 1207 | "MAX8997 SET3"); |
8fa25eda | 1208 | if (ret) |
8ae5767b | 1209 | goto err_out; |
bd6ca2cf MH |
1210 | |
1211 | gpio_direction_output(pdata->buck125_gpios[0], | |
1212 | (max8997->buck125_gpioindex >> 2) | |
1213 | & 0x1); /* SET1 */ | |
1214 | gpio_direction_output(pdata->buck125_gpios[1], | |
1215 | (max8997->buck125_gpioindex >> 1) | |
1216 | & 0x1); /* SET2 */ | |
1217 | gpio_direction_output(pdata->buck125_gpios[2], | |
1218 | (max8997->buck125_gpioindex >> 0) | |
1219 | & 0x1); /* SET3 */ | |
bd6ca2cf MH |
1220 | } |
1221 | ||
1222 | /* DVS-GPIO disabled */ | |
1223 | max8997_update_reg(i2c, MAX8997_REG_BUCK1CTRL, (pdata->buck1_gpiodvs) ? | |
1224 | (1 << 1) : (0 << 1), 1 << 1); | |
1225 | max8997_update_reg(i2c, MAX8997_REG_BUCK2CTRL, (pdata->buck2_gpiodvs) ? | |
1226 | (1 << 1) : (0 << 1), 1 << 1); | |
1227 | max8997_update_reg(i2c, MAX8997_REG_BUCK5CTRL, (pdata->buck5_gpiodvs) ? | |
1228 | (1 << 1) : (0 << 1), 1 << 1); | |
1229 | ||
dbb48e7c TB |
1230 | /* Misc Settings */ |
1231 | max8997->ramp_delay = 10; /* set 10mV/us, which is the default */ | |
1232 | max8997_write_reg(i2c, MAX8997_REG_BUCKRAMP, (0xf << 4) | 0x9); | |
1233 | ||
bd6ca2cf MH |
1234 | for (i = 0; i < pdata->num_regulators; i++) { |
1235 | const struct voltage_map_desc *desc; | |
1236 | int id = pdata->regulators[i].id; | |
1237 | ||
1238 | desc = reg_voltage_map[id]; | |
1239 | if (desc) | |
1240 | regulators[id].n_voltages = | |
1241 | (desc->max - desc->min) / desc->step + 1; | |
1242 | else if (id == MAX8997_ESAFEOUT1 || id == MAX8997_ESAFEOUT2) | |
1243 | regulators[id].n_voltages = 4; | |
1244 | else if (id == MAX8997_CHARGER_CV) | |
1245 | regulators[id].n_voltages = 16; | |
1246 | ||
c172708d MB |
1247 | config.dev = max8997->dev; |
1248 | config.init_data = pdata->regulators[i].initdata; | |
1249 | config.driver_data = max8997; | |
77b71b37 | 1250 | config.of_node = pdata->regulators[i].reg_node; |
c172708d MB |
1251 | |
1252 | rdev[i] = regulator_register(®ulators[id], &config); | |
bd6ca2cf MH |
1253 | if (IS_ERR(rdev[i])) { |
1254 | ret = PTR_ERR(rdev[i]); | |
1255 | dev_err(max8997->dev, "regulator init failed for %d\n", | |
1256 | id); | |
1257 | rdev[i] = NULL; | |
1258 | goto err; | |
1259 | } | |
1260 | } | |
1261 | ||
bd6ca2cf MH |
1262 | return 0; |
1263 | err: | |
8ae5767b AL |
1264 | while (--i >= 0) |
1265 | regulator_unregister(rdev[i]); | |
1266 | err_out: | |
bd6ca2cf MH |
1267 | return ret; |
1268 | } | |
1269 | ||
8dc995f5 | 1270 | static int max8997_pmic_remove(struct platform_device *pdev) |
bd6ca2cf MH |
1271 | { |
1272 | struct max8997_data *max8997 = platform_get_drvdata(pdev); | |
1273 | struct regulator_dev **rdev = max8997->rdev; | |
1274 | int i; | |
1275 | ||
1276 | for (i = 0; i < max8997->num_regulators; i++) | |
8ae5767b | 1277 | regulator_unregister(rdev[i]); |
bd6ca2cf MH |
1278 | return 0; |
1279 | } | |
1280 | ||
1281 | static const struct platform_device_id max8997_pmic_id[] = { | |
1282 | { "max8997-pmic", 0}, | |
1283 | { }, | |
1284 | }; | |
a51b907b | 1285 | MODULE_DEVICE_TABLE(platform, max8997_pmic_id); |
bd6ca2cf MH |
1286 | |
1287 | static struct platform_driver max8997_pmic_driver = { | |
1288 | .driver = { | |
1289 | .name = "max8997-pmic", | |
1290 | .owner = THIS_MODULE, | |
1291 | }, | |
1292 | .probe = max8997_pmic_probe, | |
5eb9f2b9 | 1293 | .remove = max8997_pmic_remove, |
bd6ca2cf MH |
1294 | .id_table = max8997_pmic_id, |
1295 | }; | |
1296 | ||
1297 | static int __init max8997_pmic_init(void) | |
1298 | { | |
1299 | return platform_driver_register(&max8997_pmic_driver); | |
1300 | } | |
1301 | subsys_initcall(max8997_pmic_init); | |
1302 | ||
1303 | static void __exit max8997_pmic_cleanup(void) | |
1304 | { | |
1305 | platform_driver_unregister(&max8997_pmic_driver); | |
1306 | } | |
1307 | module_exit(max8997_pmic_cleanup); | |
1308 | ||
1309 | MODULE_DESCRIPTION("MAXIM 8997/8966 Regulator Driver"); | |
1310 | MODULE_AUTHOR("MyungJoo Ham <myungjoo.ham@samsung.com>"); | |
1311 | MODULE_LICENSE("GPL"); |