1 | // SPDX-License-Identifier: GPL-2.0+ |
2 | // |
3 | // max8997.c - Regulator driver for the Maxim 8997/8966 |
4 | // |
5 | // Copyright (C) 2011 Samsung Electronics |
6 | // MyungJoo Ham <myungjoo.ham@samsung.com> |
7 | // |
8 | // This driver is based on max8998.c |
9 | |
10 | #include <linux/bug.h> |
11 | #include <linux/err.h> |
12 | #include <linux/gpio/consumer.h> |
13 | #include <linux/slab.h> |
14 | #include <linux/module.h> |
15 | #include <linux/platform_device.h> |
16 | #include <linux/regulator/driver.h> |
17 | #include <linux/regulator/machine.h> |
18 | #include <linux/mfd/max8997.h> |
19 | #include <linux/mfd/max8997-private.h> |
20 | #include <linux/regulator/of_regulator.h> |
21 | |
22 | struct max8997_data { |
23 | struct device *dev; |
24 | struct max8997_dev *iodev; |
25 | int num_regulators; |
26 | int ramp_delay; /* in mV/us */ |
27 | |
28 | bool buck1_gpiodvs; |
29 | bool buck2_gpiodvs; |
30 | bool buck5_gpiodvs; |
31 | u8 buck1_vol[8]; |
32 | u8 buck2_vol[8]; |
33 | u8 buck5_vol[8]; |
34 | struct gpio_desc *buck125_gpiods[3]; |
35 | int buck125_gpioindex; |
36 | bool ignore_gpiodvs_side_effect; |
37 | |
38 | u8 saved_states[MAX8997_REG_MAX]; |
39 | }; |
40 | |
41 | static const unsigned int safeoutvolt[] = { |
42 | 4850000, |
43 | 4900000, |
44 | 4950000, |
45 | 3300000, |
46 | }; |
47 | |
48 | static inline void max8997_set_gpio(struct max8997_data *max8997) |
49 | { |
50 | int set3 = (max8997->buck125_gpioindex) & 0x1; |
51 | int set2 = ((max8997->buck125_gpioindex) >> 1) & 0x1; |
52 | int set1 = ((max8997->buck125_gpioindex) >> 2) & 0x1; |
53 | |
54 | gpiod_set_value(desc: max8997->buck125_gpiods[0], value: set1); |
55 | gpiod_set_value(desc: max8997->buck125_gpiods[1], value: set2); |
56 | gpiod_set_value(desc: max8997->buck125_gpiods[2], value: set3); |
57 | } |
58 | |
59 | struct voltage_map_desc { |
60 | int min; |
61 | int max; |
62 | int step; |
63 | }; |
64 | |
65 | /* Voltage maps in uV */ |
66 | static const struct voltage_map_desc ldo_voltage_map_desc = { |
67 | .min = 800000, .max = 3950000, .step = 50000, |
68 | }; /* LDO1 ~ 18, 21 all */ |
69 | |
70 | static const struct voltage_map_desc buck1245_voltage_map_desc = { |
71 | .min = 650000, .max = 2225000, .step = 25000, |
72 | }; /* Buck1, 2, 4, 5 */ |
73 | |
74 | static const struct voltage_map_desc buck37_voltage_map_desc = { |
75 | .min = 750000, .max = 3900000, .step = 50000, |
76 | }; /* Buck3, 7 */ |
77 | |
78 | /* current map in uA */ |
79 | static const struct voltage_map_desc charger_current_map_desc = { |
80 | .min = 200000, .max = 950000, .step = 50000, |
81 | }; |
82 | |
83 | static const struct voltage_map_desc topoff_current_map_desc = { |
84 | .min = 50000, .max = 200000, .step = 10000, |
85 | }; |
86 | |
87 | static const struct voltage_map_desc *reg_voltage_map[] = { |
88 | [MAX8997_LDO1] = &ldo_voltage_map_desc, |
89 | [MAX8997_LDO2] = &ldo_voltage_map_desc, |
90 | [MAX8997_LDO3] = &ldo_voltage_map_desc, |
91 | [MAX8997_LDO4] = &ldo_voltage_map_desc, |
92 | [MAX8997_LDO5] = &ldo_voltage_map_desc, |
93 | [MAX8997_LDO6] = &ldo_voltage_map_desc, |
94 | [MAX8997_LDO7] = &ldo_voltage_map_desc, |
95 | [MAX8997_LDO8] = &ldo_voltage_map_desc, |
96 | [MAX8997_LDO9] = &ldo_voltage_map_desc, |
97 | [MAX8997_LDO10] = &ldo_voltage_map_desc, |
98 | [MAX8997_LDO11] = &ldo_voltage_map_desc, |
99 | [MAX8997_LDO12] = &ldo_voltage_map_desc, |
100 | [MAX8997_LDO13] = &ldo_voltage_map_desc, |
101 | [MAX8997_LDO14] = &ldo_voltage_map_desc, |
102 | [MAX8997_LDO15] = &ldo_voltage_map_desc, |
103 | [MAX8997_LDO16] = &ldo_voltage_map_desc, |
104 | [MAX8997_LDO17] = &ldo_voltage_map_desc, |
105 | [MAX8997_LDO18] = &ldo_voltage_map_desc, |
106 | [MAX8997_LDO21] = &ldo_voltage_map_desc, |
107 | [MAX8997_BUCK1] = &buck1245_voltage_map_desc, |
108 | [MAX8997_BUCK2] = &buck1245_voltage_map_desc, |
109 | [MAX8997_BUCK3] = &buck37_voltage_map_desc, |
110 | [MAX8997_BUCK4] = &buck1245_voltage_map_desc, |
111 | [MAX8997_BUCK5] = &buck1245_voltage_map_desc, |
112 | [MAX8997_BUCK6] = NULL, |
113 | [MAX8997_BUCK7] = &buck37_voltage_map_desc, |
114 | [MAX8997_EN32KHZ_AP] = NULL, |
115 | [MAX8997_EN32KHZ_CP] = NULL, |
116 | [MAX8997_ENVICHG] = NULL, |
117 | [MAX8997_ESAFEOUT1] = NULL, |
118 | [MAX8997_ESAFEOUT2] = NULL, |
119 | [MAX8997_CHARGER_CV] = NULL, |
120 | [MAX8997_CHARGER] = &charger_current_map_desc, |
121 | [MAX8997_CHARGER_TOPOFF] = &topoff_current_map_desc, |
122 | }; |
123 | |
124 | static int max8997_list_voltage_charger_cv(struct regulator_dev *rdev, |
125 | unsigned int selector) |
126 | { |
127 | int rid = rdev_get_id(rdev); |
128 | |
129 | if (rid != MAX8997_CHARGER_CV) |
130 | goto err; |
131 | |
132 | switch (selector) { |
133 | case 0x00: |
134 | return 4200000; |
135 | case 0x01 ... 0x0E: |
136 | return 4000000 + 20000 * (selector - 0x01); |
137 | case 0x0F: |
138 | return 4350000; |
139 | default: |
140 | return -EINVAL; |
141 | } |
142 | err: |
143 | return -EINVAL; |
144 | } |
145 | |
146 | static int max8997_list_voltage(struct regulator_dev *rdev, |
147 | unsigned int selector) |
148 | { |
149 | const struct voltage_map_desc *desc; |
150 | int rid = rdev_get_id(rdev); |
151 | int val; |
152 | |
153 | if (rid < 0 || rid >= ARRAY_SIZE(reg_voltage_map)) |
154 | return -EINVAL; |
155 | |
156 | desc = reg_voltage_map[rid]; |
157 | if (desc == NULL) |
158 | return -EINVAL; |
159 | |
160 | val = desc->min + desc->step * selector; |
161 | if (val > desc->max) |
162 | return -EINVAL; |
163 | |
164 | return val; |
165 | } |
166 | |
167 | static int max8997_get_enable_register(struct regulator_dev *rdev, |
168 | int *reg, int *mask, int *pattern) |
169 | { |
170 | int rid = rdev_get_id(rdev); |
171 | |
172 | switch (rid) { |
173 | case MAX8997_LDO1 ... MAX8997_LDO21: |
174 | *reg = MAX8997_REG_LDO1CTRL + (rid - MAX8997_LDO1); |
175 | *mask = 0xC0; |
176 | *pattern = 0xC0; |
177 | break; |
178 | case MAX8997_BUCK1: |
179 | *reg = MAX8997_REG_BUCK1CTRL; |
180 | *mask = 0x01; |
181 | *pattern = 0x01; |
182 | break; |
183 | case MAX8997_BUCK2: |
184 | *reg = MAX8997_REG_BUCK2CTRL; |
185 | *mask = 0x01; |
186 | *pattern = 0x01; |
187 | break; |
188 | case MAX8997_BUCK3: |
189 | *reg = MAX8997_REG_BUCK3CTRL; |
190 | *mask = 0x01; |
191 | *pattern = 0x01; |
192 | break; |
193 | case MAX8997_BUCK4: |
194 | *reg = MAX8997_REG_BUCK4CTRL; |
195 | *mask = 0x01; |
196 | *pattern = 0x01; |
197 | break; |
198 | case MAX8997_BUCK5: |
199 | *reg = MAX8997_REG_BUCK5CTRL; |
200 | *mask = 0x01; |
201 | *pattern = 0x01; |
202 | break; |
203 | case MAX8997_BUCK6: |
204 | *reg = MAX8997_REG_BUCK6CTRL; |
205 | *mask = 0x01; |
206 | *pattern = 0x01; |
207 | break; |
208 | case MAX8997_BUCK7: |
209 | *reg = MAX8997_REG_BUCK7CTRL; |
210 | *mask = 0x01; |
211 | *pattern = 0x01; |
212 | break; |
213 | case MAX8997_EN32KHZ_AP ... MAX8997_EN32KHZ_CP: |
214 | *reg = MAX8997_REG_MAINCON1; |
215 | *mask = 0x01 << (rid - MAX8997_EN32KHZ_AP); |
216 | *pattern = 0x01 << (rid - MAX8997_EN32KHZ_AP); |
217 | break; |
218 | case MAX8997_ENVICHG: |
219 | *reg = MAX8997_REG_MBCCTRL1; |
220 | *mask = 0x80; |
221 | *pattern = 0x80; |
222 | break; |
223 | case MAX8997_ESAFEOUT1 ... MAX8997_ESAFEOUT2: |
224 | *reg = MAX8997_REG_SAFEOUTCTRL; |
225 | *mask = 0x40 << (rid - MAX8997_ESAFEOUT1); |
226 | *pattern = 0x40 << (rid - MAX8997_ESAFEOUT1); |
227 | break; |
228 | case MAX8997_CHARGER: |
229 | *reg = MAX8997_REG_MBCCTRL2; |
230 | *mask = 0x40; |
231 | *pattern = 0x40; |
232 | break; |
233 | default: |
234 | /* Not controllable or not exists */ |
235 | return -EINVAL; |
236 | } |
237 | |
238 | return 0; |
239 | } |
240 | |
241 | static int max8997_reg_is_enabled(struct regulator_dev *rdev) |
242 | { |
243 | struct max8997_data *max8997 = rdev_get_drvdata(rdev); |
244 | struct i2c_client *i2c = max8997->iodev->i2c; |
245 | int ret, reg, mask, pattern; |
246 | u8 val; |
247 | |
248 | ret = max8997_get_enable_register(rdev, reg: ®, mask: &mask, pattern: &pattern); |
249 | if (ret) |
250 | return ret; |
251 | |
252 | ret = max8997_read_reg(i2c, reg, dest: &val); |
253 | if (ret) |
254 | return ret; |
255 | |
256 | return (val & mask) == pattern; |
257 | } |
258 | |
259 | static int max8997_reg_enable(struct regulator_dev *rdev) |
260 | { |
261 | struct max8997_data *max8997 = rdev_get_drvdata(rdev); |
262 | struct i2c_client *i2c = max8997->iodev->i2c; |
263 | int ret, reg, mask, pattern; |
264 | |
265 | ret = max8997_get_enable_register(rdev, reg: ®, mask: &mask, pattern: &pattern); |
266 | if (ret) |
267 | return ret; |
268 | |
269 | return max8997_update_reg(i2c, reg, val: pattern, mask); |
270 | } |
271 | |
272 | static int max8997_reg_disable(struct regulator_dev *rdev) |
273 | { |
274 | struct max8997_data *max8997 = rdev_get_drvdata(rdev); |
275 | struct i2c_client *i2c = max8997->iodev->i2c; |
276 | int ret, reg, mask, pattern; |
277 | |
278 | ret = max8997_get_enable_register(rdev, reg: ®, mask: &mask, pattern: &pattern); |
279 | if (ret) |
280 | return ret; |
281 | |
282 | return max8997_update_reg(i2c, reg, val: ~pattern, mask); |
283 | } |
284 | |
285 | static int max8997_get_voltage_register(struct regulator_dev *rdev, |
286 | int *_reg, int *_shift, int *_mask) |
287 | { |
288 | struct max8997_data *max8997 = rdev_get_drvdata(rdev); |
289 | int rid = rdev_get_id(rdev); |
290 | int reg, shift = 0, mask = 0x3f; |
291 | |
292 | switch (rid) { |
293 | case MAX8997_LDO1 ... MAX8997_LDO21: |
294 | reg = MAX8997_REG_LDO1CTRL + (rid - MAX8997_LDO1); |
295 | break; |
296 | case MAX8997_BUCK1: |
297 | reg = MAX8997_REG_BUCK1DVS1; |
298 | if (max8997->buck1_gpiodvs) |
299 | reg += max8997->buck125_gpioindex; |
300 | break; |
301 | case MAX8997_BUCK2: |
302 | reg = MAX8997_REG_BUCK2DVS1; |
303 | if (max8997->buck2_gpiodvs) |
304 | reg += max8997->buck125_gpioindex; |
305 | break; |
306 | case MAX8997_BUCK3: |
307 | reg = MAX8997_REG_BUCK3DVS; |
308 | break; |
309 | case MAX8997_BUCK4: |
310 | reg = MAX8997_REG_BUCK4DVS; |
311 | break; |
312 | case MAX8997_BUCK5: |
313 | reg = MAX8997_REG_BUCK5DVS1; |
314 | if (max8997->buck5_gpiodvs) |
315 | reg += max8997->buck125_gpioindex; |
316 | break; |
317 | case MAX8997_BUCK7: |
318 | reg = MAX8997_REG_BUCK7DVS; |
319 | break; |
320 | case MAX8997_ESAFEOUT1 ... MAX8997_ESAFEOUT2: |
321 | reg = MAX8997_REG_SAFEOUTCTRL; |
322 | shift = (rid == MAX8997_ESAFEOUT2) ? 2 : 0; |
323 | mask = 0x3; |
324 | break; |
325 | case MAX8997_CHARGER_CV: |
326 | reg = MAX8997_REG_MBCCTRL3; |
327 | shift = 0; |
328 | mask = 0xf; |
329 | break; |
330 | case MAX8997_CHARGER: |
331 | reg = MAX8997_REG_MBCCTRL4; |
332 | shift = 0; |
333 | mask = 0xf; |
334 | break; |
335 | case MAX8997_CHARGER_TOPOFF: |
336 | reg = MAX8997_REG_MBCCTRL5; |
337 | shift = 0; |
338 | mask = 0xf; |
339 | break; |
340 | default: |
341 | return -EINVAL; |
342 | } |
343 | |
344 | *_reg = reg; |
345 | *_shift = shift; |
346 | *_mask = mask; |
347 | |
348 | return 0; |
349 | } |
350 | |
351 | static int max8997_get_voltage_sel(struct regulator_dev *rdev) |
352 | { |
353 | struct max8997_data *max8997 = rdev_get_drvdata(rdev); |
354 | struct i2c_client *i2c = max8997->iodev->i2c; |
355 | int reg, shift, mask, ret; |
356 | u8 val; |
357 | |
358 | ret = max8997_get_voltage_register(rdev, reg: ®, shift: &shift, mask: &mask); |
359 | if (ret) |
360 | return ret; |
361 | |
362 | ret = max8997_read_reg(i2c, reg, dest: &val); |
363 | if (ret) |
364 | return ret; |
365 | |
366 | val >>= shift; |
367 | val &= mask; |
368 | |
369 | return val; |
370 | } |
371 | |
372 | static inline int max8997_get_voltage_proper_val( |
373 | const struct voltage_map_desc *desc, |
374 | int min_vol, int max_vol) |
375 | { |
376 | int i; |
377 | |
378 | if (desc == NULL) |
379 | return -EINVAL; |
380 | |
381 | if (max_vol < desc->min || min_vol > desc->max) |
382 | return -EINVAL; |
383 | |
384 | if (min_vol < desc->min) |
385 | min_vol = desc->min; |
386 | |
387 | i = DIV_ROUND_UP(min_vol - desc->min, desc->step); |
388 | |
389 | if (desc->min + desc->step * i > max_vol) |
390 | return -EINVAL; |
391 | |
392 | return i; |
393 | } |
394 | |
395 | static int max8997_set_voltage_charger_cv(struct regulator_dev *rdev, |
396 | int min_uV, int max_uV, unsigned *selector) |
397 | { |
398 | struct max8997_data *max8997 = rdev_get_drvdata(rdev); |
399 | struct i2c_client *i2c = max8997->iodev->i2c; |
400 | int rid = rdev_get_id(rdev); |
401 | int lb, ub; |
402 | int reg, shift = 0, mask, ret = 0; |
403 | u8 val = 0x0; |
404 | |
405 | if (rid != MAX8997_CHARGER_CV) |
406 | return -EINVAL; |
407 | |
408 | ret = max8997_get_voltage_register(rdev, reg: ®, shift: &shift, mask: &mask); |
409 | if (ret) |
410 | return ret; |
411 | |
412 | if (max_uV < 4000000 || min_uV > 4350000) |
413 | return -EINVAL; |
414 | |
415 | if (min_uV <= 4000000) |
416 | val = 0x1; |
417 | else if (min_uV <= 4200000 && max_uV >= 4200000) |
418 | val = 0x0; |
419 | else { |
420 | lb = (min_uV - 4000001) / 20000 + 2; |
421 | ub = (max_uV - 4000000) / 20000 + 1; |
422 | |
423 | if (lb > ub) |
424 | return -EINVAL; |
425 | |
426 | if (lb < 0xf) |
427 | val = lb; |
428 | else { |
429 | if (ub >= 0xf) |
430 | val = 0xf; |
431 | else |
432 | return -EINVAL; |
433 | } |
434 | } |
435 | |
436 | *selector = val; |
437 | |
438 | ret = max8997_update_reg(i2c, reg, val: val << shift, mask); |
439 | |
440 | return ret; |
441 | } |
442 | |
443 | /* |
444 | * For LDO1 ~ LDO21, BUCK1~5, BUCK7, CHARGER, CHARGER_TOPOFF |
445 | * BUCK1, 2, and 5 are available if they are not controlled by gpio |
446 | */ |
447 | static int max8997_set_voltage_ldobuck(struct regulator_dev *rdev, |
448 | int min_uV, int max_uV, unsigned *selector) |
449 | { |
450 | struct max8997_data *max8997 = rdev_get_drvdata(rdev); |
451 | struct i2c_client *i2c = max8997->iodev->i2c; |
452 | const struct voltage_map_desc *desc; |
453 | int rid = rdev_get_id(rdev); |
454 | int i, reg, shift, mask, ret; |
455 | |
456 | switch (rid) { |
457 | case MAX8997_LDO1 ... MAX8997_LDO21: |
458 | break; |
459 | case MAX8997_BUCK1 ... MAX8997_BUCK5: |
460 | break; |
461 | case MAX8997_BUCK6: |
462 | return -EINVAL; |
463 | case MAX8997_BUCK7: |
464 | break; |
465 | case MAX8997_CHARGER: |
466 | break; |
467 | case MAX8997_CHARGER_TOPOFF: |
468 | break; |
469 | default: |
470 | return -EINVAL; |
471 | } |
472 | |
473 | desc = reg_voltage_map[rid]; |
474 | |
475 | i = max8997_get_voltage_proper_val(desc, min_vol: min_uV, max_vol: max_uV); |
476 | if (i < 0) |
477 | return i; |
478 | |
479 | ret = max8997_get_voltage_register(rdev, reg: ®, shift: &shift, mask: &mask); |
480 | if (ret) |
481 | return ret; |
482 | |
483 | ret = max8997_update_reg(i2c, reg, val: i << shift, mask: mask << shift); |
484 | *selector = i; |
485 | |
486 | return ret; |
487 | } |
488 | |
489 | static int max8997_set_voltage_buck_time_sel(struct regulator_dev *rdev, |
490 | unsigned int old_selector, |
491 | unsigned int new_selector) |
492 | { |
493 | struct max8997_data *max8997 = rdev_get_drvdata(rdev); |
494 | int rid = rdev_get_id(rdev); |
495 | const struct voltage_map_desc *desc = reg_voltage_map[rid]; |
496 | |
497 | /* Delay is required only if the voltage is increasing */ |
498 | if (old_selector >= new_selector) |
499 | return 0; |
500 | |
501 | /* No need to delay if gpio_dvs_mode */ |
502 | switch (rid) { |
503 | case MAX8997_BUCK1: |
504 | if (max8997->buck1_gpiodvs) |
505 | return 0; |
506 | break; |
507 | case MAX8997_BUCK2: |
508 | if (max8997->buck2_gpiodvs) |
509 | return 0; |
510 | break; |
511 | case MAX8997_BUCK5: |
512 | if (max8997->buck5_gpiodvs) |
513 | return 0; |
514 | break; |
515 | } |
516 | |
517 | switch (rid) { |
518 | case MAX8997_BUCK1: |
519 | case MAX8997_BUCK2: |
520 | case MAX8997_BUCK4: |
521 | case MAX8997_BUCK5: |
522 | return DIV_ROUND_UP(desc->step * (new_selector - old_selector), |
523 | max8997->ramp_delay * 1000); |
524 | } |
525 | |
526 | return 0; |
527 | } |
528 | |
529 | /* |
530 | * Assess the damage on the voltage setting of BUCK1,2,5 by the change. |
531 | * |
532 | * When GPIO-DVS mode is used for multiple bucks, changing the voltage value |
533 | * of one of the bucks may affect that of another buck, which is the side |
534 | * effect of the change (set_voltage). This function examines the GPIO-DVS |
535 | * configurations and checks whether such side-effect exists. |
536 | */ |
537 | static int max8997_assess_side_effect(struct regulator_dev *rdev, |
538 | u8 new_val, int *best) |
539 | { |
540 | struct max8997_data *max8997 = rdev_get_drvdata(rdev); |
541 | int rid = rdev_get_id(rdev); |
542 | u8 *buckx_val[3]; |
543 | bool buckx_gpiodvs[3]; |
544 | int side_effect[8]; |
545 | int min_side_effect = INT_MAX; |
546 | int i; |
547 | |
548 | *best = -1; |
549 | |
550 | switch (rid) { |
551 | case MAX8997_BUCK1: |
552 | rid = 0; |
553 | break; |
554 | case MAX8997_BUCK2: |
555 | rid = 1; |
556 | break; |
557 | case MAX8997_BUCK5: |
558 | rid = 2; |
559 | break; |
560 | default: |
561 | return -EINVAL; |
562 | } |
563 | |
564 | buckx_val[0] = max8997->buck1_vol; |
565 | buckx_val[1] = max8997->buck2_vol; |
566 | buckx_val[2] = max8997->buck5_vol; |
567 | buckx_gpiodvs[0] = max8997->buck1_gpiodvs; |
568 | buckx_gpiodvs[1] = max8997->buck2_gpiodvs; |
569 | buckx_gpiodvs[2] = max8997->buck5_gpiodvs; |
570 | |
571 | for (i = 0; i < 8; i++) { |
572 | int others; |
573 | |
574 | if (new_val != (buckx_val[rid])[i]) { |
575 | side_effect[i] = -1; |
576 | continue; |
577 | } |
578 | |
579 | side_effect[i] = 0; |
580 | for (others = 0; others < 3; others++) { |
581 | int diff; |
582 | |
583 | if (others == rid) |
584 | continue; |
585 | if (buckx_gpiodvs[others] == false) |
586 | continue; /* Not affected */ |
587 | diff = (buckx_val[others])[i] - |
588 | (buckx_val[others])[max8997->buck125_gpioindex]; |
589 | if (diff > 0) |
590 | side_effect[i] += diff; |
591 | else if (diff < 0) |
592 | side_effect[i] -= diff; |
593 | } |
594 | if (side_effect[i] == 0) { |
595 | *best = i; |
596 | return 0; /* NO SIDE EFFECT! Use This! */ |
597 | } |
598 | if (side_effect[i] < min_side_effect) { |
599 | min_side_effect = side_effect[i]; |
600 | *best = i; |
601 | } |
602 | } |
603 | |
604 | if (*best == -1) |
605 | return -EINVAL; |
606 | |
607 | return side_effect[*best]; |
608 | } |
609 | |
610 | /* |
611 | * For Buck 1 ~ 5 and 7. If it is not controlled by GPIO, this calls |
612 | * max8997_set_voltage_ldobuck to do the job. |
613 | */ |
614 | static int max8997_set_voltage_buck(struct regulator_dev *rdev, |
615 | int min_uV, int max_uV, unsigned *selector) |
616 | { |
617 | struct max8997_data *max8997 = rdev_get_drvdata(rdev); |
618 | int rid = rdev_get_id(rdev); |
619 | const struct voltage_map_desc *desc; |
620 | int new_val, new_idx, damage, tmp_val, tmp_idx, tmp_dmg; |
621 | bool gpio_dvs_mode = false; |
622 | |
623 | if (rid < MAX8997_BUCK1 || rid > MAX8997_BUCK7) |
624 | return -EINVAL; |
625 | |
626 | switch (rid) { |
627 | case MAX8997_BUCK1: |
628 | if (max8997->buck1_gpiodvs) |
629 | gpio_dvs_mode = true; |
630 | break; |
631 | case MAX8997_BUCK2: |
632 | if (max8997->buck2_gpiodvs) |
633 | gpio_dvs_mode = true; |
634 | break; |
635 | case MAX8997_BUCK5: |
636 | if (max8997->buck5_gpiodvs) |
637 | gpio_dvs_mode = true; |
638 | break; |
639 | } |
640 | |
641 | if (!gpio_dvs_mode) |
642 | return max8997_set_voltage_ldobuck(rdev, min_uV, max_uV, |
643 | selector); |
644 | |
645 | desc = reg_voltage_map[rid]; |
646 | new_val = max8997_get_voltage_proper_val(desc, min_vol: min_uV, max_vol: max_uV); |
647 | if (new_val < 0) |
648 | return new_val; |
649 | |
650 | tmp_dmg = INT_MAX; |
651 | tmp_idx = -1; |
652 | tmp_val = -1; |
653 | do { |
654 | damage = max8997_assess_side_effect(rdev, new_val, best: &new_idx); |
655 | if (damage == 0) |
656 | goto out; |
657 | |
658 | if (tmp_dmg > damage) { |
659 | tmp_idx = new_idx; |
660 | tmp_val = new_val; |
661 | tmp_dmg = damage; |
662 | } |
663 | |
664 | new_val++; |
665 | } while (desc->min + desc->step * new_val <= desc->max); |
666 | |
667 | new_idx = tmp_idx; |
668 | new_val = tmp_val; |
669 | |
670 | if (max8997->ignore_gpiodvs_side_effect == false) |
671 | return -EINVAL; |
672 | |
673 | dev_warn(&rdev->dev, |
674 | "MAX8997 GPIO-DVS Side Effect Warning: GPIO SET: %d -> %d\n" , |
675 | max8997->buck125_gpioindex, tmp_idx); |
676 | |
677 | out: |
678 | if (new_idx < 0 || new_val < 0) |
679 | return -EINVAL; |
680 | |
681 | max8997->buck125_gpioindex = new_idx; |
682 | max8997_set_gpio(max8997); |
683 | *selector = new_val; |
684 | |
685 | return 0; |
686 | } |
687 | |
688 | /* For SAFEOUT1 and SAFEOUT2 */ |
689 | static int max8997_set_voltage_safeout_sel(struct regulator_dev *rdev, |
690 | unsigned selector) |
691 | { |
692 | struct max8997_data *max8997 = rdev_get_drvdata(rdev); |
693 | struct i2c_client *i2c = max8997->iodev->i2c; |
694 | int rid = rdev_get_id(rdev); |
695 | int reg, shift = 0, mask, ret; |
696 | |
697 | if (rid != MAX8997_ESAFEOUT1 && rid != MAX8997_ESAFEOUT2) |
698 | return -EINVAL; |
699 | |
700 | ret = max8997_get_voltage_register(rdev, reg: ®, shift: &shift, mask: &mask); |
701 | if (ret) |
702 | return ret; |
703 | |
704 | return max8997_update_reg(i2c, reg, val: selector << shift, mask: mask << shift); |
705 | } |
706 | |
707 | static int max8997_reg_disable_suspend(struct regulator_dev *rdev) |
708 | { |
709 | struct max8997_data *max8997 = rdev_get_drvdata(rdev); |
710 | struct i2c_client *i2c = max8997->iodev->i2c; |
711 | int ret, reg, mask, pattern; |
712 | int rid = rdev_get_id(rdev); |
713 | |
714 | ret = max8997_get_enable_register(rdev, reg: ®, mask: &mask, pattern: &pattern); |
715 | if (ret) |
716 | return ret; |
717 | |
718 | max8997_read_reg(i2c, reg, dest: &max8997->saved_states[rid]); |
719 | |
720 | if (rid == MAX8997_LDO1 || |
721 | rid == MAX8997_LDO10 || |
722 | rid == MAX8997_LDO21) { |
723 | dev_dbg(&rdev->dev, "Conditional Power-Off for %s\n" , |
724 | rdev->desc->name); |
725 | return max8997_update_reg(i2c, reg, val: 0x40, mask); |
726 | } |
727 | |
728 | dev_dbg(&rdev->dev, "Full Power-Off for %s (%xh -> %xh)\n" , |
729 | rdev->desc->name, max8997->saved_states[rid] & mask, |
730 | (~pattern) & mask); |
731 | return max8997_update_reg(i2c, reg, val: ~pattern, mask); |
732 | } |
733 | |
734 | static const struct regulator_ops max8997_ldo_ops = { |
735 | .list_voltage = max8997_list_voltage, |
736 | .is_enabled = max8997_reg_is_enabled, |
737 | .enable = max8997_reg_enable, |
738 | .disable = max8997_reg_disable, |
739 | .get_voltage_sel = max8997_get_voltage_sel, |
740 | .set_voltage = max8997_set_voltage_ldobuck, |
741 | .set_suspend_disable = max8997_reg_disable_suspend, |
742 | }; |
743 | |
744 | static const struct regulator_ops max8997_buck_ops = { |
745 | .list_voltage = max8997_list_voltage, |
746 | .is_enabled = max8997_reg_is_enabled, |
747 | .enable = max8997_reg_enable, |
748 | .disable = max8997_reg_disable, |
749 | .get_voltage_sel = max8997_get_voltage_sel, |
750 | .set_voltage = max8997_set_voltage_buck, |
751 | .set_voltage_time_sel = max8997_set_voltage_buck_time_sel, |
752 | .set_suspend_disable = max8997_reg_disable_suspend, |
753 | }; |
754 | |
755 | static const struct regulator_ops max8997_fixedvolt_ops = { |
756 | .list_voltage = max8997_list_voltage, |
757 | .is_enabled = max8997_reg_is_enabled, |
758 | .enable = max8997_reg_enable, |
759 | .disable = max8997_reg_disable, |
760 | .set_suspend_disable = max8997_reg_disable_suspend, |
761 | }; |
762 | |
763 | static const struct regulator_ops max8997_safeout_ops = { |
764 | .list_voltage = regulator_list_voltage_table, |
765 | .is_enabled = max8997_reg_is_enabled, |
766 | .enable = max8997_reg_enable, |
767 | .disable = max8997_reg_disable, |
768 | .get_voltage_sel = max8997_get_voltage_sel, |
769 | .set_voltage_sel = max8997_set_voltage_safeout_sel, |
770 | .set_suspend_disable = max8997_reg_disable_suspend, |
771 | }; |
772 | |
773 | static const struct regulator_ops max8997_fixedstate_ops = { |
774 | .list_voltage = max8997_list_voltage_charger_cv, |
775 | .get_voltage_sel = max8997_get_voltage_sel, |
776 | .set_voltage = max8997_set_voltage_charger_cv, |
777 | }; |
778 | |
779 | static int max8997_set_current_limit(struct regulator_dev *rdev, |
780 | int min_uA, int max_uA) |
781 | { |
782 | unsigned dummy; |
783 | int rid = rdev_get_id(rdev); |
784 | |
785 | if (rid != MAX8997_CHARGER && rid != MAX8997_CHARGER_TOPOFF) |
786 | return -EINVAL; |
787 | |
788 | /* Reuse max8997_set_voltage_ldobuck to set current_limit. */ |
789 | return max8997_set_voltage_ldobuck(rdev, min_uV: min_uA, max_uV: max_uA, selector: &dummy); |
790 | } |
791 | |
792 | static int max8997_get_current_limit(struct regulator_dev *rdev) |
793 | { |
794 | int sel, rid = rdev_get_id(rdev); |
795 | |
796 | if (rid != MAX8997_CHARGER && rid != MAX8997_CHARGER_TOPOFF) |
797 | return -EINVAL; |
798 | |
799 | sel = max8997_get_voltage_sel(rdev); |
800 | if (sel < 0) |
801 | return sel; |
802 | |
803 | /* Reuse max8997_list_voltage to get current_limit. */ |
804 | return max8997_list_voltage(rdev, selector: sel); |
805 | } |
806 | |
807 | static const struct regulator_ops max8997_charger_ops = { |
808 | .is_enabled = max8997_reg_is_enabled, |
809 | .enable = max8997_reg_enable, |
810 | .disable = max8997_reg_disable, |
811 | .get_current_limit = max8997_get_current_limit, |
812 | .set_current_limit = max8997_set_current_limit, |
813 | }; |
814 | |
815 | static const struct regulator_ops max8997_charger_fixedstate_ops = { |
816 | .get_current_limit = max8997_get_current_limit, |
817 | .set_current_limit = max8997_set_current_limit, |
818 | }; |
819 | |
820 | #define MAX8997_VOLTAGE_REGULATOR(_name, _ops) {\ |
821 | .name = #_name, \ |
822 | .id = MAX8997_##_name, \ |
823 | .ops = &_ops, \ |
824 | .type = REGULATOR_VOLTAGE, \ |
825 | .owner = THIS_MODULE, \ |
826 | } |
827 | |
828 | #define MAX8997_CURRENT_REGULATOR(_name, _ops) {\ |
829 | .name = #_name, \ |
830 | .id = MAX8997_##_name, \ |
831 | .ops = &_ops, \ |
832 | .type = REGULATOR_CURRENT, \ |
833 | .owner = THIS_MODULE, \ |
834 | } |
835 | |
836 | static struct regulator_desc regulators[] = { |
837 | MAX8997_VOLTAGE_REGULATOR(LDO1, max8997_ldo_ops), |
838 | MAX8997_VOLTAGE_REGULATOR(LDO2, max8997_ldo_ops), |
839 | MAX8997_VOLTAGE_REGULATOR(LDO3, max8997_ldo_ops), |
840 | MAX8997_VOLTAGE_REGULATOR(LDO4, max8997_ldo_ops), |
841 | MAX8997_VOLTAGE_REGULATOR(LDO5, max8997_ldo_ops), |
842 | MAX8997_VOLTAGE_REGULATOR(LDO6, max8997_ldo_ops), |
843 | MAX8997_VOLTAGE_REGULATOR(LDO7, max8997_ldo_ops), |
844 | MAX8997_VOLTAGE_REGULATOR(LDO8, max8997_ldo_ops), |
845 | MAX8997_VOLTAGE_REGULATOR(LDO9, max8997_ldo_ops), |
846 | MAX8997_VOLTAGE_REGULATOR(LDO10, max8997_ldo_ops), |
847 | MAX8997_VOLTAGE_REGULATOR(LDO11, max8997_ldo_ops), |
848 | MAX8997_VOLTAGE_REGULATOR(LDO12, max8997_ldo_ops), |
849 | MAX8997_VOLTAGE_REGULATOR(LDO13, max8997_ldo_ops), |
850 | MAX8997_VOLTAGE_REGULATOR(LDO14, max8997_ldo_ops), |
851 | MAX8997_VOLTAGE_REGULATOR(LDO15, max8997_ldo_ops), |
852 | MAX8997_VOLTAGE_REGULATOR(LDO16, max8997_ldo_ops), |
853 | MAX8997_VOLTAGE_REGULATOR(LDO17, max8997_ldo_ops), |
854 | MAX8997_VOLTAGE_REGULATOR(LDO18, max8997_ldo_ops), |
855 | MAX8997_VOLTAGE_REGULATOR(LDO21, max8997_ldo_ops), |
856 | MAX8997_VOLTAGE_REGULATOR(BUCK1, max8997_buck_ops), |
857 | MAX8997_VOLTAGE_REGULATOR(BUCK2, max8997_buck_ops), |
858 | MAX8997_VOLTAGE_REGULATOR(BUCK3, max8997_buck_ops), |
859 | MAX8997_VOLTAGE_REGULATOR(BUCK4, max8997_buck_ops), |
860 | MAX8997_VOLTAGE_REGULATOR(BUCK5, max8997_buck_ops), |
861 | MAX8997_VOLTAGE_REGULATOR(BUCK6, max8997_fixedvolt_ops), |
862 | MAX8997_VOLTAGE_REGULATOR(BUCK7, max8997_buck_ops), |
863 | MAX8997_VOLTAGE_REGULATOR(EN32KHZ_AP, max8997_fixedvolt_ops), |
864 | MAX8997_VOLTAGE_REGULATOR(EN32KHZ_CP, max8997_fixedvolt_ops), |
865 | MAX8997_VOLTAGE_REGULATOR(ENVICHG, max8997_fixedvolt_ops), |
866 | MAX8997_VOLTAGE_REGULATOR(ESAFEOUT1, max8997_safeout_ops), |
867 | MAX8997_VOLTAGE_REGULATOR(ESAFEOUT2, max8997_safeout_ops), |
868 | MAX8997_VOLTAGE_REGULATOR(CHARGER_CV, max8997_fixedstate_ops), |
869 | MAX8997_CURRENT_REGULATOR(CHARGER, max8997_charger_ops), |
870 | MAX8997_CURRENT_REGULATOR(CHARGER_TOPOFF, |
871 | max8997_charger_fixedstate_ops), |
872 | }; |
873 | |
874 | #ifdef CONFIG_OF |
875 | static int max8997_pmic_dt_parse_pdata(struct platform_device *pdev, |
876 | struct max8997_platform_data *pdata) |
877 | { |
878 | struct max8997_dev *iodev = dev_get_drvdata(dev: pdev->dev.parent); |
879 | struct device_node *pmic_np, *regulators_np, *reg_np; |
880 | struct max8997_regulator_data *rdata; |
881 | unsigned int i, dvs_voltage_nr = 1; |
882 | |
883 | pmic_np = iodev->dev->of_node; |
884 | if (!pmic_np) { |
885 | dev_err(&pdev->dev, "could not find pmic sub-node\n" ); |
886 | return -ENODEV; |
887 | } |
888 | |
889 | regulators_np = of_get_child_by_name(node: pmic_np, name: "regulators" ); |
890 | if (!regulators_np) { |
891 | dev_err(&pdev->dev, "could not find regulators sub-node\n" ); |
892 | return -EINVAL; |
893 | } |
894 | |
895 | /* count the number of regulators to be supported in pmic */ |
896 | pdata->num_regulators = of_get_child_count(np: regulators_np); |
897 | |
898 | rdata = devm_kcalloc(dev: &pdev->dev, |
899 | n: pdata->num_regulators, size: sizeof(*rdata), |
900 | GFP_KERNEL); |
901 | if (!rdata) { |
902 | of_node_put(node: regulators_np); |
903 | return -ENOMEM; |
904 | } |
905 | |
906 | pdata->regulators = rdata; |
907 | for_each_child_of_node(regulators_np, reg_np) { |
908 | for (i = 0; i < ARRAY_SIZE(regulators); i++) |
909 | if (of_node_name_eq(np: reg_np, name: regulators[i].name)) |
910 | break; |
911 | |
912 | if (i == ARRAY_SIZE(regulators)) { |
913 | dev_warn(&pdev->dev, "don't know how to configure regulator %pOFn\n" , |
914 | reg_np); |
915 | continue; |
916 | } |
917 | |
918 | rdata->id = i; |
919 | rdata->initdata = of_get_regulator_init_data(dev: &pdev->dev, |
920 | node: reg_np, |
921 | desc: ®ulators[i]); |
922 | rdata->reg_node = reg_np; |
923 | rdata++; |
924 | } |
925 | of_node_put(node: regulators_np); |
926 | |
927 | pdata->buck1_gpiodvs = of_property_read_bool(np: pmic_np, propname: "max8997,pmic-buck1-uses-gpio-dvs" ); |
928 | pdata->buck2_gpiodvs = of_property_read_bool(np: pmic_np, propname: "max8997,pmic-buck2-uses-gpio-dvs" ); |
929 | pdata->buck5_gpiodvs = of_property_read_bool(np: pmic_np, propname: "max8997,pmic-buck5-uses-gpio-dvs" ); |
930 | |
931 | if (pdata->buck1_gpiodvs || pdata->buck2_gpiodvs || |
932 | pdata->buck5_gpiodvs) { |
933 | if (of_property_read_u32(np: pmic_np, |
934 | propname: "max8997,pmic-buck125-default-dvs-idx" , |
935 | out_value: &pdata->buck125_default_idx)) { |
936 | pdata->buck125_default_idx = 0; |
937 | } else { |
938 | if (pdata->buck125_default_idx >= 8) { |
939 | pdata->buck125_default_idx = 0; |
940 | dev_info(&pdev->dev, "invalid value for default dvs index, using 0 instead\n" ); |
941 | } |
942 | } |
943 | |
944 | if (of_get_property(node: pmic_np, |
945 | name: "max8997,pmic-ignore-gpiodvs-side-effect" , NULL)) |
946 | pdata->ignore_gpiodvs_side_effect = true; |
947 | |
948 | dvs_voltage_nr = 8; |
949 | } |
950 | |
951 | if (of_property_read_u32_array(np: pmic_np, |
952 | propname: "max8997,pmic-buck1-dvs-voltage" , |
953 | out_values: pdata->buck1_voltage, sz: dvs_voltage_nr)) { |
954 | dev_err(&pdev->dev, "buck1 voltages not specified\n" ); |
955 | return -EINVAL; |
956 | } |
957 | |
958 | if (of_property_read_u32_array(np: pmic_np, |
959 | propname: "max8997,pmic-buck2-dvs-voltage" , |
960 | out_values: pdata->buck2_voltage, sz: dvs_voltage_nr)) { |
961 | dev_err(&pdev->dev, "buck2 voltages not specified\n" ); |
962 | return -EINVAL; |
963 | } |
964 | |
965 | if (of_property_read_u32_array(np: pmic_np, |
966 | propname: "max8997,pmic-buck5-dvs-voltage" , |
967 | out_values: pdata->buck5_voltage, sz: dvs_voltage_nr)) { |
968 | dev_err(&pdev->dev, "buck5 voltages not specified\n" ); |
969 | return -EINVAL; |
970 | } |
971 | |
972 | return 0; |
973 | } |
974 | #else |
975 | static int max8997_pmic_dt_parse_pdata(struct platform_device *pdev, |
976 | struct max8997_platform_data *pdata) |
977 | { |
978 | return 0; |
979 | } |
980 | #endif /* CONFIG_OF */ |
981 | |
982 | static int max8997_pmic_probe(struct platform_device *pdev) |
983 | { |
984 | struct max8997_dev *iodev = dev_get_drvdata(dev: pdev->dev.parent); |
985 | struct max8997_platform_data *pdata = iodev->pdata; |
986 | struct regulator_config config = { }; |
987 | struct regulator_dev *rdev; |
988 | struct max8997_data *max8997; |
989 | struct i2c_client *i2c; |
990 | int i, ret, nr_dvs; |
991 | u8 max_buck1 = 0, max_buck2 = 0, max_buck5 = 0; |
992 | |
993 | if (!pdata) { |
994 | dev_err(&pdev->dev, "No platform init data supplied.\n" ); |
995 | return -ENODEV; |
996 | } |
997 | |
998 | if (iodev->dev->of_node) { |
999 | ret = max8997_pmic_dt_parse_pdata(pdev, pdata); |
1000 | if (ret) |
1001 | return ret; |
1002 | } |
1003 | |
1004 | max8997 = devm_kzalloc(dev: &pdev->dev, size: sizeof(struct max8997_data), |
1005 | GFP_KERNEL); |
1006 | if (!max8997) |
1007 | return -ENOMEM; |
1008 | |
1009 | max8997->dev = &pdev->dev; |
1010 | max8997->iodev = iodev; |
1011 | max8997->num_regulators = pdata->num_regulators; |
1012 | platform_set_drvdata(pdev, data: max8997); |
1013 | i2c = max8997->iodev->i2c; |
1014 | |
1015 | max8997->buck125_gpioindex = pdata->buck125_default_idx; |
1016 | max8997->buck1_gpiodvs = pdata->buck1_gpiodvs; |
1017 | max8997->buck2_gpiodvs = pdata->buck2_gpiodvs; |
1018 | max8997->buck5_gpiodvs = pdata->buck5_gpiodvs; |
1019 | max8997->ignore_gpiodvs_side_effect = pdata->ignore_gpiodvs_side_effect; |
1020 | |
1021 | nr_dvs = (pdata->buck1_gpiodvs || pdata->buck2_gpiodvs || |
1022 | pdata->buck5_gpiodvs) ? 8 : 1; |
1023 | |
1024 | for (i = 0; i < nr_dvs; i++) { |
1025 | max8997->buck1_vol[i] = ret = |
1026 | max8997_get_voltage_proper_val( |
1027 | desc: &buck1245_voltage_map_desc, |
1028 | min_vol: pdata->buck1_voltage[i], |
1029 | max_vol: pdata->buck1_voltage[i] + |
1030 | buck1245_voltage_map_desc.step); |
1031 | if (ret < 0) |
1032 | return ret; |
1033 | |
1034 | max8997->buck2_vol[i] = ret = |
1035 | max8997_get_voltage_proper_val( |
1036 | desc: &buck1245_voltage_map_desc, |
1037 | min_vol: pdata->buck2_voltage[i], |
1038 | max_vol: pdata->buck2_voltage[i] + |
1039 | buck1245_voltage_map_desc.step); |
1040 | if (ret < 0) |
1041 | return ret; |
1042 | |
1043 | max8997->buck5_vol[i] = ret = |
1044 | max8997_get_voltage_proper_val( |
1045 | desc: &buck1245_voltage_map_desc, |
1046 | min_vol: pdata->buck5_voltage[i], |
1047 | max_vol: pdata->buck5_voltage[i] + |
1048 | buck1245_voltage_map_desc.step); |
1049 | if (ret < 0) |
1050 | return ret; |
1051 | |
1052 | if (max_buck1 < max8997->buck1_vol[i]) |
1053 | max_buck1 = max8997->buck1_vol[i]; |
1054 | if (max_buck2 < max8997->buck2_vol[i]) |
1055 | max_buck2 = max8997->buck2_vol[i]; |
1056 | if (max_buck5 < max8997->buck5_vol[i]) |
1057 | max_buck5 = max8997->buck5_vol[i]; |
1058 | } |
1059 | |
1060 | /* For the safety, set max voltage before setting up */ |
1061 | for (i = 0; i < 8; i++) { |
1062 | max8997_update_reg(i2c, reg: MAX8997_REG_BUCK1DVS1 + i, |
1063 | val: max_buck1, mask: 0x3f); |
1064 | max8997_update_reg(i2c, reg: MAX8997_REG_BUCK2DVS1 + i, |
1065 | val: max_buck2, mask: 0x3f); |
1066 | max8997_update_reg(i2c, reg: MAX8997_REG_BUCK5DVS1 + i, |
1067 | val: max_buck5, mask: 0x3f); |
1068 | } |
1069 | |
1070 | /* Initialize all the DVS related BUCK registers */ |
1071 | for (i = 0; i < nr_dvs; i++) { |
1072 | max8997_update_reg(i2c, reg: MAX8997_REG_BUCK1DVS1 + i, |
1073 | val: max8997->buck1_vol[i], |
1074 | mask: 0x3f); |
1075 | max8997_update_reg(i2c, reg: MAX8997_REG_BUCK2DVS1 + i, |
1076 | val: max8997->buck2_vol[i], |
1077 | mask: 0x3f); |
1078 | max8997_update_reg(i2c, reg: MAX8997_REG_BUCK5DVS1 + i, |
1079 | val: max8997->buck5_vol[i], |
1080 | mask: 0x3f); |
1081 | } |
1082 | |
1083 | /* |
1084 | * If buck 1, 2, and 5 do not care DVS GPIO settings, ignore them. |
1085 | * If at least one of them cares, set gpios. |
1086 | */ |
1087 | if (pdata->buck1_gpiodvs || pdata->buck2_gpiodvs || |
1088 | pdata->buck5_gpiodvs) { |
1089 | const char *gpio_names[3] = {"MAX8997 SET1" , "MAX8997 SET2" , "MAX8997 SET3" }; |
1090 | |
1091 | for (i = 0; i < 3; i++) { |
1092 | enum gpiod_flags flags; |
1093 | |
1094 | if (max8997->buck125_gpioindex & BIT(2 - i)) |
1095 | flags = GPIOD_OUT_HIGH; |
1096 | else |
1097 | flags = GPIOD_OUT_LOW; |
1098 | |
1099 | max8997->buck125_gpiods[i] = devm_gpiod_get_index(dev: iodev->dev, |
1100 | con_id: "max8997,pmic-buck125-dvs" , |
1101 | idx: i, |
1102 | flags); |
1103 | if (IS_ERR(ptr: max8997->buck125_gpiods[i])) { |
1104 | ret = PTR_ERR(ptr: max8997->buck125_gpiods[i]); |
1105 | return dev_err_probe(dev: iodev->dev, err: ret, fmt: "cant get GPIO %d (%d)\n" , |
1106 | i, ret); |
1107 | } |
1108 | gpiod_set_consumer_name(desc: max8997->buck125_gpiods[i], name: gpio_names[i]); |
1109 | } |
1110 | } |
1111 | |
1112 | /* DVS-GPIO disabled */ |
1113 | max8997_update_reg(i2c, reg: MAX8997_REG_BUCK1CTRL, val: (pdata->buck1_gpiodvs) ? |
1114 | (1 << 1) : (0 << 1), mask: 1 << 1); |
1115 | max8997_update_reg(i2c, reg: MAX8997_REG_BUCK2CTRL, val: (pdata->buck2_gpiodvs) ? |
1116 | (1 << 1) : (0 << 1), mask: 1 << 1); |
1117 | max8997_update_reg(i2c, reg: MAX8997_REG_BUCK5CTRL, val: (pdata->buck5_gpiodvs) ? |
1118 | (1 << 1) : (0 << 1), mask: 1 << 1); |
1119 | |
1120 | /* Misc Settings */ |
1121 | max8997->ramp_delay = 10; /* set 10mV/us, which is the default */ |
1122 | max8997_write_reg(i2c, reg: MAX8997_REG_BUCKRAMP, value: (0xf << 4) | 0x9); |
1123 | |
1124 | for (i = 0; i < pdata->num_regulators; i++) { |
1125 | const struct voltage_map_desc *desc; |
1126 | int id = pdata->regulators[i].id; |
1127 | |
1128 | desc = reg_voltage_map[id]; |
1129 | if (desc) { |
1130 | regulators[id].n_voltages = |
1131 | (desc->max - desc->min) / desc->step + 1; |
1132 | } else if (id == MAX8997_ESAFEOUT1 || id == MAX8997_ESAFEOUT2) { |
1133 | regulators[id].volt_table = safeoutvolt; |
1134 | regulators[id].n_voltages = ARRAY_SIZE(safeoutvolt); |
1135 | } else if (id == MAX8997_CHARGER_CV) { |
1136 | regulators[id].n_voltages = 16; |
1137 | } |
1138 | |
1139 | config.dev = max8997->dev; |
1140 | config.init_data = pdata->regulators[i].initdata; |
1141 | config.driver_data = max8997; |
1142 | config.of_node = pdata->regulators[i].reg_node; |
1143 | |
1144 | rdev = devm_regulator_register(dev: &pdev->dev, regulator_desc: ®ulators[id], |
1145 | config: &config); |
1146 | if (IS_ERR(ptr: rdev)) { |
1147 | dev_err(max8997->dev, "regulator init failed for %d\n" , |
1148 | id); |
1149 | return PTR_ERR(ptr: rdev); |
1150 | } |
1151 | } |
1152 | |
1153 | return 0; |
1154 | } |
1155 | |
1156 | static const struct platform_device_id max8997_pmic_id[] = { |
1157 | { "max8997-pmic" , 0}, |
1158 | { }, |
1159 | }; |
1160 | MODULE_DEVICE_TABLE(platform, max8997_pmic_id); |
1161 | |
1162 | static struct platform_driver max8997_pmic_driver = { |
1163 | .driver = { |
1164 | .name = "max8997-pmic" , |
1165 | .probe_type = PROBE_PREFER_ASYNCHRONOUS, |
1166 | }, |
1167 | .probe = max8997_pmic_probe, |
1168 | .id_table = max8997_pmic_id, |
1169 | }; |
1170 | |
1171 | static int __init max8997_pmic_init(void) |
1172 | { |
1173 | return platform_driver_register(&max8997_pmic_driver); |
1174 | } |
1175 | subsys_initcall(max8997_pmic_init); |
1176 | |
1177 | static void __exit max8997_pmic_cleanup(void) |
1178 | { |
1179 | platform_driver_unregister(&max8997_pmic_driver); |
1180 | } |
1181 | module_exit(max8997_pmic_cleanup); |
1182 | |
1183 | MODULE_DESCRIPTION("MAXIM 8997/8966 Regulator Driver" ); |
1184 | MODULE_AUTHOR("MyungJoo Ham <myungjoo.ham@samsung.com>" ); |
1185 | MODULE_LICENSE("GPL" ); |
1186 | |