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.h> |
13 | #include <linux/of_gpio.h> |
14 | #include <linux/slab.h> |
15 | #include <linux/module.h> |
16 | #include <linux/platform_device.h> |
17 | #include <linux/regulator/driver.h> |
18 | #include <linux/regulator/machine.h> |
19 | #include <linux/mfd/max8997.h> |
20 | #include <linux/mfd/max8997-private.h> |
21 | #include <linux/regulator/of_regulator.h> |
22 | |
23 | struct max8997_data { |
24 | struct device *dev; |
25 | struct max8997_dev *iodev; |
26 | int num_regulators; |
27 | int ramp_delay; /* in mV/us */ |
28 | |
29 | bool buck1_gpiodvs; |
30 | bool buck2_gpiodvs; |
31 | bool buck5_gpiodvs; |
32 | u8 buck1_vol[8]; |
33 | u8 buck2_vol[8]; |
34 | u8 buck5_vol[8]; |
35 | int buck125_gpios[3]; |
36 | int buck125_gpioindex; |
37 | bool ignore_gpiodvs_side_effect; |
38 | |
39 | u8 saved_states[MAX8997_REG_MAX]; |
40 | }; |
41 | |
42 | static const unsigned int safeoutvolt[] = { |
43 | 4850000, |
44 | 4900000, |
45 | 4950000, |
46 | 3300000, |
47 | }; |
48 | |
49 | static inline void max8997_set_gpio(struct max8997_data *max8997) |
50 | { |
51 | int set3 = (max8997->buck125_gpioindex) & 0x1; |
52 | int set2 = ((max8997->buck125_gpioindex) >> 1) & 0x1; |
53 | int set1 = ((max8997->buck125_gpioindex) >> 2) & 0x1; |
54 | |
55 | gpio_set_value(gpio: max8997->buck125_gpios[0], value: set1); |
56 | gpio_set_value(gpio: max8997->buck125_gpios[1], value: set2); |
57 | gpio_set_value(gpio: max8997->buck125_gpios[2], value: set3); |
58 | } |
59 | |
60 | struct voltage_map_desc { |
61 | int min; |
62 | int max; |
63 | int step; |
64 | }; |
65 | |
66 | /* Voltage maps in uV */ |
67 | static const struct voltage_map_desc ldo_voltage_map_desc = { |
68 | .min = 800000, .max = 3950000, .step = 50000, |
69 | }; /* LDO1 ~ 18, 21 all */ |
70 | |
71 | static const struct voltage_map_desc buck1245_voltage_map_desc = { |
72 | .min = 650000, .max = 2225000, .step = 25000, |
73 | }; /* Buck1, 2, 4, 5 */ |
74 | |
75 | static const struct voltage_map_desc buck37_voltage_map_desc = { |
76 | .min = 750000, .max = 3900000, .step = 50000, |
77 | }; /* Buck3, 7 */ |
78 | |
79 | /* current map in uA */ |
80 | static const struct voltage_map_desc charger_current_map_desc = { |
81 | .min = 200000, .max = 950000, .step = 50000, |
82 | }; |
83 | |
84 | static const struct voltage_map_desc topoff_current_map_desc = { |
85 | .min = 50000, .max = 200000, .step = 10000, |
86 | }; |
87 | |
88 | static const struct voltage_map_desc *reg_voltage_map[] = { |
89 | [MAX8997_LDO1] = &ldo_voltage_map_desc, |
90 | [MAX8997_LDO2] = &ldo_voltage_map_desc, |
91 | [MAX8997_LDO3] = &ldo_voltage_map_desc, |
92 | [MAX8997_LDO4] = &ldo_voltage_map_desc, |
93 | [MAX8997_LDO5] = &ldo_voltage_map_desc, |
94 | [MAX8997_LDO6] = &ldo_voltage_map_desc, |
95 | [MAX8997_LDO7] = &ldo_voltage_map_desc, |
96 | [MAX8997_LDO8] = &ldo_voltage_map_desc, |
97 | [MAX8997_LDO9] = &ldo_voltage_map_desc, |
98 | [MAX8997_LDO10] = &ldo_voltage_map_desc, |
99 | [MAX8997_LDO11] = &ldo_voltage_map_desc, |
100 | [MAX8997_LDO12] = &ldo_voltage_map_desc, |
101 | [MAX8997_LDO13] = &ldo_voltage_map_desc, |
102 | [MAX8997_LDO14] = &ldo_voltage_map_desc, |
103 | [MAX8997_LDO15] = &ldo_voltage_map_desc, |
104 | [MAX8997_LDO16] = &ldo_voltage_map_desc, |
105 | [MAX8997_LDO17] = &ldo_voltage_map_desc, |
106 | [MAX8997_LDO18] = &ldo_voltage_map_desc, |
107 | [MAX8997_LDO21] = &ldo_voltage_map_desc, |
108 | [MAX8997_BUCK1] = &buck1245_voltage_map_desc, |
109 | [MAX8997_BUCK2] = &buck1245_voltage_map_desc, |
110 | [MAX8997_BUCK3] = &buck37_voltage_map_desc, |
111 | [MAX8997_BUCK4] = &buck1245_voltage_map_desc, |
112 | [MAX8997_BUCK5] = &buck1245_voltage_map_desc, |
113 | [MAX8997_BUCK6] = NULL, |
114 | [MAX8997_BUCK7] = &buck37_voltage_map_desc, |
115 | [MAX8997_EN32KHZ_AP] = NULL, |
116 | [MAX8997_EN32KHZ_CP] = NULL, |
117 | [MAX8997_ENVICHG] = NULL, |
118 | [MAX8997_ESAFEOUT1] = NULL, |
119 | [MAX8997_ESAFEOUT2] = NULL, |
120 | [MAX8997_CHARGER_CV] = NULL, |
121 | [MAX8997_CHARGER] = &charger_current_map_desc, |
122 | [MAX8997_CHARGER_TOPOFF] = &topoff_current_map_desc, |
123 | }; |
124 | |
125 | static int max8997_list_voltage_charger_cv(struct regulator_dev *rdev, |
126 | unsigned int selector) |
127 | { |
128 | int rid = rdev_get_id(rdev); |
129 | |
130 | if (rid != MAX8997_CHARGER_CV) |
131 | goto err; |
132 | |
133 | switch (selector) { |
134 | case 0x00: |
135 | return 4200000; |
136 | case 0x01 ... 0x0E: |
137 | return 4000000 + 20000 * (selector - 0x01); |
138 | case 0x0F: |
139 | return 4350000; |
140 | default: |
141 | return -EINVAL; |
142 | } |
143 | err: |
144 | return -EINVAL; |
145 | } |
146 | |
147 | static int max8997_list_voltage(struct regulator_dev *rdev, |
148 | unsigned int selector) |
149 | { |
150 | const struct voltage_map_desc *desc; |
151 | int rid = rdev_get_id(rdev); |
152 | int val; |
153 | |
154 | if (rid < 0 || rid >= ARRAY_SIZE(reg_voltage_map)) |
155 | return -EINVAL; |
156 | |
157 | desc = reg_voltage_map[rid]; |
158 | if (desc == NULL) |
159 | return -EINVAL; |
160 | |
161 | val = desc->min + desc->step * selector; |
162 | if (val > desc->max) |
163 | return -EINVAL; |
164 | |
165 | return val; |
166 | } |
167 | |
168 | static int max8997_get_enable_register(struct regulator_dev *rdev, |
169 | int *reg, int *mask, int *pattern) |
170 | { |
171 | int rid = rdev_get_id(rdev); |
172 | |
173 | switch (rid) { |
174 | case MAX8997_LDO1 ... MAX8997_LDO21: |
175 | *reg = MAX8997_REG_LDO1CTRL + (rid - MAX8997_LDO1); |
176 | *mask = 0xC0; |
177 | *pattern = 0xC0; |
178 | break; |
179 | case MAX8997_BUCK1: |
180 | *reg = MAX8997_REG_BUCK1CTRL; |
181 | *mask = 0x01; |
182 | *pattern = 0x01; |
183 | break; |
184 | case MAX8997_BUCK2: |
185 | *reg = MAX8997_REG_BUCK2CTRL; |
186 | *mask = 0x01; |
187 | *pattern = 0x01; |
188 | break; |
189 | case MAX8997_BUCK3: |
190 | *reg = MAX8997_REG_BUCK3CTRL; |
191 | *mask = 0x01; |
192 | *pattern = 0x01; |
193 | break; |
194 | case MAX8997_BUCK4: |
195 | *reg = MAX8997_REG_BUCK4CTRL; |
196 | *mask = 0x01; |
197 | *pattern = 0x01; |
198 | break; |
199 | case MAX8997_BUCK5: |
200 | *reg = MAX8997_REG_BUCK5CTRL; |
201 | *mask = 0x01; |
202 | *pattern = 0x01; |
203 | break; |
204 | case MAX8997_BUCK6: |
205 | *reg = MAX8997_REG_BUCK6CTRL; |
206 | *mask = 0x01; |
207 | *pattern = 0x01; |
208 | break; |
209 | case MAX8997_BUCK7: |
210 | *reg = MAX8997_REG_BUCK7CTRL; |
211 | *mask = 0x01; |
212 | *pattern = 0x01; |
213 | break; |
214 | case MAX8997_EN32KHZ_AP ... MAX8997_EN32KHZ_CP: |
215 | *reg = MAX8997_REG_MAINCON1; |
216 | *mask = 0x01 << (rid - MAX8997_EN32KHZ_AP); |
217 | *pattern = 0x01 << (rid - MAX8997_EN32KHZ_AP); |
218 | break; |
219 | case MAX8997_ENVICHG: |
220 | *reg = MAX8997_REG_MBCCTRL1; |
221 | *mask = 0x80; |
222 | *pattern = 0x80; |
223 | break; |
224 | case MAX8997_ESAFEOUT1 ... MAX8997_ESAFEOUT2: |
225 | *reg = MAX8997_REG_SAFEOUTCTRL; |
226 | *mask = 0x40 << (rid - MAX8997_ESAFEOUT1); |
227 | *pattern = 0x40 << (rid - MAX8997_ESAFEOUT1); |
228 | break; |
229 | case MAX8997_CHARGER: |
230 | *reg = MAX8997_REG_MBCCTRL2; |
231 | *mask = 0x40; |
232 | *pattern = 0x40; |
233 | break; |
234 | default: |
235 | /* Not controllable or not exists */ |
236 | return -EINVAL; |
237 | } |
238 | |
239 | return 0; |
240 | } |
241 | |
242 | static int max8997_reg_is_enabled(struct regulator_dev *rdev) |
243 | { |
244 | struct max8997_data *max8997 = rdev_get_drvdata(rdev); |
245 | struct i2c_client *i2c = max8997->iodev->i2c; |
246 | int ret, reg, mask, pattern; |
247 | u8 val; |
248 | |
249 | ret = max8997_get_enable_register(rdev, reg: ®, mask: &mask, pattern: &pattern); |
250 | if (ret) |
251 | return ret; |
252 | |
253 | ret = max8997_read_reg(i2c, reg, dest: &val); |
254 | if (ret) |
255 | return ret; |
256 | |
257 | return (val & mask) == pattern; |
258 | } |
259 | |
260 | static int max8997_reg_enable(struct regulator_dev *rdev) |
261 | { |
262 | struct max8997_data *max8997 = rdev_get_drvdata(rdev); |
263 | struct i2c_client *i2c = max8997->iodev->i2c; |
264 | int ret, reg, mask, pattern; |
265 | |
266 | ret = max8997_get_enable_register(rdev, reg: ®, mask: &mask, pattern: &pattern); |
267 | if (ret) |
268 | return ret; |
269 | |
270 | return max8997_update_reg(i2c, reg, val: pattern, mask); |
271 | } |
272 | |
273 | static int max8997_reg_disable(struct regulator_dev *rdev) |
274 | { |
275 | struct max8997_data *max8997 = rdev_get_drvdata(rdev); |
276 | struct i2c_client *i2c = max8997->iodev->i2c; |
277 | int ret, reg, mask, pattern; |
278 | |
279 | ret = max8997_get_enable_register(rdev, reg: ®, mask: &mask, pattern: &pattern); |
280 | if (ret) |
281 | return ret; |
282 | |
283 | return max8997_update_reg(i2c, reg, val: ~pattern, mask); |
284 | } |
285 | |
286 | static int max8997_get_voltage_register(struct regulator_dev *rdev, |
287 | int *_reg, int *_shift, int *_mask) |
288 | { |
289 | struct max8997_data *max8997 = rdev_get_drvdata(rdev); |
290 | int rid = rdev_get_id(rdev); |
291 | int reg, shift = 0, mask = 0x3f; |
292 | |
293 | switch (rid) { |
294 | case MAX8997_LDO1 ... MAX8997_LDO21: |
295 | reg = MAX8997_REG_LDO1CTRL + (rid - MAX8997_LDO1); |
296 | break; |
297 | case MAX8997_BUCK1: |
298 | reg = MAX8997_REG_BUCK1DVS1; |
299 | if (max8997->buck1_gpiodvs) |
300 | reg += max8997->buck125_gpioindex; |
301 | break; |
302 | case MAX8997_BUCK2: |
303 | reg = MAX8997_REG_BUCK2DVS1; |
304 | if (max8997->buck2_gpiodvs) |
305 | reg += max8997->buck125_gpioindex; |
306 | break; |
307 | case MAX8997_BUCK3: |
308 | reg = MAX8997_REG_BUCK3DVS; |
309 | break; |
310 | case MAX8997_BUCK4: |
311 | reg = MAX8997_REG_BUCK4DVS; |
312 | break; |
313 | case MAX8997_BUCK5: |
314 | reg = MAX8997_REG_BUCK5DVS1; |
315 | if (max8997->buck5_gpiodvs) |
316 | reg += max8997->buck125_gpioindex; |
317 | break; |
318 | case MAX8997_BUCK7: |
319 | reg = MAX8997_REG_BUCK7DVS; |
320 | break; |
321 | case MAX8997_ESAFEOUT1 ... MAX8997_ESAFEOUT2: |
322 | reg = MAX8997_REG_SAFEOUTCTRL; |
323 | shift = (rid == MAX8997_ESAFEOUT2) ? 2 : 0; |
324 | mask = 0x3; |
325 | break; |
326 | case MAX8997_CHARGER_CV: |
327 | reg = MAX8997_REG_MBCCTRL3; |
328 | shift = 0; |
329 | mask = 0xf; |
330 | break; |
331 | case MAX8997_CHARGER: |
332 | reg = MAX8997_REG_MBCCTRL4; |
333 | shift = 0; |
334 | mask = 0xf; |
335 | break; |
336 | case MAX8997_CHARGER_TOPOFF: |
337 | reg = MAX8997_REG_MBCCTRL5; |
338 | shift = 0; |
339 | mask = 0xf; |
340 | break; |
341 | default: |
342 | return -EINVAL; |
343 | } |
344 | |
345 | *_reg = reg; |
346 | *_shift = shift; |
347 | *_mask = mask; |
348 | |
349 | return 0; |
350 | } |
351 | |
352 | static int max8997_get_voltage_sel(struct regulator_dev *rdev) |
353 | { |
354 | struct max8997_data *max8997 = rdev_get_drvdata(rdev); |
355 | struct i2c_client *i2c = max8997->iodev->i2c; |
356 | int reg, shift, mask, ret; |
357 | u8 val; |
358 | |
359 | ret = max8997_get_voltage_register(rdev, reg: ®, shift: &shift, mask: &mask); |
360 | if (ret) |
361 | return ret; |
362 | |
363 | ret = max8997_read_reg(i2c, reg, dest: &val); |
364 | if (ret) |
365 | return ret; |
366 | |
367 | val >>= shift; |
368 | val &= mask; |
369 | |
370 | return val; |
371 | } |
372 | |
373 | static inline int max8997_get_voltage_proper_val( |
374 | const struct voltage_map_desc *desc, |
375 | int min_vol, int max_vol) |
376 | { |
377 | int i; |
378 | |
379 | if (desc == NULL) |
380 | return -EINVAL; |
381 | |
382 | if (max_vol < desc->min || min_vol > desc->max) |
383 | return -EINVAL; |
384 | |
385 | if (min_vol < desc->min) |
386 | min_vol = desc->min; |
387 | |
388 | i = DIV_ROUND_UP(min_vol - desc->min, desc->step); |
389 | |
390 | if (desc->min + desc->step * i > max_vol) |
391 | return -EINVAL; |
392 | |
393 | return i; |
394 | } |
395 | |
396 | static int max8997_set_voltage_charger_cv(struct regulator_dev *rdev, |
397 | int min_uV, int max_uV, unsigned *selector) |
398 | { |
399 | struct max8997_data *max8997 = rdev_get_drvdata(rdev); |
400 | struct i2c_client *i2c = max8997->iodev->i2c; |
401 | int rid = rdev_get_id(rdev); |
402 | int lb, ub; |
403 | int reg, shift = 0, mask, ret = 0; |
404 | u8 val = 0x0; |
405 | |
406 | if (rid != MAX8997_CHARGER_CV) |
407 | return -EINVAL; |
408 | |
409 | ret = max8997_get_voltage_register(rdev, reg: ®, shift: &shift, mask: &mask); |
410 | if (ret) |
411 | return ret; |
412 | |
413 | if (max_uV < 4000000 || min_uV > 4350000) |
414 | return -EINVAL; |
415 | |
416 | if (min_uV <= 4000000) |
417 | val = 0x1; |
418 | else if (min_uV <= 4200000 && max_uV >= 4200000) |
419 | val = 0x0; |
420 | else { |
421 | lb = (min_uV - 4000001) / 20000 + 2; |
422 | ub = (max_uV - 4000000) / 20000 + 1; |
423 | |
424 | if (lb > ub) |
425 | return -EINVAL; |
426 | |
427 | if (lb < 0xf) |
428 | val = lb; |
429 | else { |
430 | if (ub >= 0xf) |
431 | val = 0xf; |
432 | else |
433 | return -EINVAL; |
434 | } |
435 | } |
436 | |
437 | *selector = val; |
438 | |
439 | ret = max8997_update_reg(i2c, reg, val: val << shift, mask); |
440 | |
441 | return ret; |
442 | } |
443 | |
444 | /* |
445 | * For LDO1 ~ LDO21, BUCK1~5, BUCK7, CHARGER, CHARGER_TOPOFF |
446 | * BUCK1, 2, and 5 are available if they are not controlled by gpio |
447 | */ |
448 | static int max8997_set_voltage_ldobuck(struct regulator_dev *rdev, |
449 | int min_uV, int max_uV, unsigned *selector) |
450 | { |
451 | struct max8997_data *max8997 = rdev_get_drvdata(rdev); |
452 | struct i2c_client *i2c = max8997->iodev->i2c; |
453 | const struct voltage_map_desc *desc; |
454 | int rid = rdev_get_id(rdev); |
455 | int i, reg, shift, mask, ret; |
456 | |
457 | switch (rid) { |
458 | case MAX8997_LDO1 ... MAX8997_LDO21: |
459 | break; |
460 | case MAX8997_BUCK1 ... MAX8997_BUCK5: |
461 | break; |
462 | case MAX8997_BUCK6: |
463 | return -EINVAL; |
464 | case MAX8997_BUCK7: |
465 | break; |
466 | case MAX8997_CHARGER: |
467 | break; |
468 | case MAX8997_CHARGER_TOPOFF: |
469 | break; |
470 | default: |
471 | return -EINVAL; |
472 | } |
473 | |
474 | desc = reg_voltage_map[rid]; |
475 | |
476 | i = max8997_get_voltage_proper_val(desc, min_vol: min_uV, max_vol: max_uV); |
477 | if (i < 0) |
478 | return i; |
479 | |
480 | ret = max8997_get_voltage_register(rdev, reg: ®, shift: &shift, mask: &mask); |
481 | if (ret) |
482 | return ret; |
483 | |
484 | ret = max8997_update_reg(i2c, reg, val: i << shift, mask: mask << shift); |
485 | *selector = i; |
486 | |
487 | return ret; |
488 | } |
489 | |
490 | static int max8997_set_voltage_buck_time_sel(struct regulator_dev *rdev, |
491 | unsigned int old_selector, |
492 | unsigned int new_selector) |
493 | { |
494 | struct max8997_data *max8997 = rdev_get_drvdata(rdev); |
495 | int rid = rdev_get_id(rdev); |
496 | const struct voltage_map_desc *desc = reg_voltage_map[rid]; |
497 | |
498 | /* Delay is required only if the voltage is increasing */ |
499 | if (old_selector >= new_selector) |
500 | return 0; |
501 | |
502 | /* No need to delay if gpio_dvs_mode */ |
503 | switch (rid) { |
504 | case MAX8997_BUCK1: |
505 | if (max8997->buck1_gpiodvs) |
506 | return 0; |
507 | break; |
508 | case MAX8997_BUCK2: |
509 | if (max8997->buck2_gpiodvs) |
510 | return 0; |
511 | break; |
512 | case MAX8997_BUCK5: |
513 | if (max8997->buck5_gpiodvs) |
514 | return 0; |
515 | break; |
516 | } |
517 | |
518 | switch (rid) { |
519 | case MAX8997_BUCK1: |
520 | case MAX8997_BUCK2: |
521 | case MAX8997_BUCK4: |
522 | case MAX8997_BUCK5: |
523 | return DIV_ROUND_UP(desc->step * (new_selector - old_selector), |
524 | max8997->ramp_delay * 1000); |
525 | } |
526 | |
527 | return 0; |
528 | } |
529 | |
530 | /* |
531 | * Assess the damage on the voltage setting of BUCK1,2,5 by the change. |
532 | * |
533 | * When GPIO-DVS mode is used for multiple bucks, changing the voltage value |
534 | * of one of the bucks may affect that of another buck, which is the side |
535 | * effect of the change (set_voltage). This function examines the GPIO-DVS |
536 | * configurations and checks whether such side-effect exists. |
537 | */ |
538 | static int max8997_assess_side_effect(struct regulator_dev *rdev, |
539 | u8 new_val, int *best) |
540 | { |
541 | struct max8997_data *max8997 = rdev_get_drvdata(rdev); |
542 | int rid = rdev_get_id(rdev); |
543 | u8 *buckx_val[3]; |
544 | bool buckx_gpiodvs[3]; |
545 | int side_effect[8]; |
546 | int min_side_effect = INT_MAX; |
547 | int i; |
548 | |
549 | *best = -1; |
550 | |
551 | switch (rid) { |
552 | case MAX8997_BUCK1: |
553 | rid = 0; |
554 | break; |
555 | case MAX8997_BUCK2: |
556 | rid = 1; |
557 | break; |
558 | case MAX8997_BUCK5: |
559 | rid = 2; |
560 | break; |
561 | default: |
562 | return -EINVAL; |
563 | } |
564 | |
565 | buckx_val[0] = max8997->buck1_vol; |
566 | buckx_val[1] = max8997->buck2_vol; |
567 | buckx_val[2] = max8997->buck5_vol; |
568 | buckx_gpiodvs[0] = max8997->buck1_gpiodvs; |
569 | buckx_gpiodvs[1] = max8997->buck2_gpiodvs; |
570 | buckx_gpiodvs[2] = max8997->buck5_gpiodvs; |
571 | |
572 | for (i = 0; i < 8; i++) { |
573 | int others; |
574 | |
575 | if (new_val != (buckx_val[rid])[i]) { |
576 | side_effect[i] = -1; |
577 | continue; |
578 | } |
579 | |
580 | side_effect[i] = 0; |
581 | for (others = 0; others < 3; others++) { |
582 | int diff; |
583 | |
584 | if (others == rid) |
585 | continue; |
586 | if (buckx_gpiodvs[others] == false) |
587 | continue; /* Not affected */ |
588 | diff = (buckx_val[others])[i] - |
589 | (buckx_val[others])[max8997->buck125_gpioindex]; |
590 | if (diff > 0) |
591 | side_effect[i] += diff; |
592 | else if (diff < 0) |
593 | side_effect[i] -= diff; |
594 | } |
595 | if (side_effect[i] == 0) { |
596 | *best = i; |
597 | return 0; /* NO SIDE EFFECT! Use This! */ |
598 | } |
599 | if (side_effect[i] < min_side_effect) { |
600 | min_side_effect = side_effect[i]; |
601 | *best = i; |
602 | } |
603 | } |
604 | |
605 | if (*best == -1) |
606 | return -EINVAL; |
607 | |
608 | return side_effect[*best]; |
609 | } |
610 | |
611 | /* |
612 | * For Buck 1 ~ 5 and 7. If it is not controlled by GPIO, this calls |
613 | * max8997_set_voltage_ldobuck to do the job. |
614 | */ |
615 | static int max8997_set_voltage_buck(struct regulator_dev *rdev, |
616 | int min_uV, int max_uV, unsigned *selector) |
617 | { |
618 | struct max8997_data *max8997 = rdev_get_drvdata(rdev); |
619 | int rid = rdev_get_id(rdev); |
620 | const struct voltage_map_desc *desc; |
621 | int new_val, new_idx, damage, tmp_val, tmp_idx, tmp_dmg; |
622 | bool gpio_dvs_mode = false; |
623 | |
624 | if (rid < MAX8997_BUCK1 || rid > MAX8997_BUCK7) |
625 | return -EINVAL; |
626 | |
627 | switch (rid) { |
628 | case MAX8997_BUCK1: |
629 | if (max8997->buck1_gpiodvs) |
630 | gpio_dvs_mode = true; |
631 | break; |
632 | case MAX8997_BUCK2: |
633 | if (max8997->buck2_gpiodvs) |
634 | gpio_dvs_mode = true; |
635 | break; |
636 | case MAX8997_BUCK5: |
637 | if (max8997->buck5_gpiodvs) |
638 | gpio_dvs_mode = true; |
639 | break; |
640 | } |
641 | |
642 | if (!gpio_dvs_mode) |
643 | return max8997_set_voltage_ldobuck(rdev, min_uV, max_uV, |
644 | selector); |
645 | |
646 | desc = reg_voltage_map[rid]; |
647 | new_val = max8997_get_voltage_proper_val(desc, min_vol: min_uV, max_vol: max_uV); |
648 | if (new_val < 0) |
649 | return new_val; |
650 | |
651 | tmp_dmg = INT_MAX; |
652 | tmp_idx = -1; |
653 | tmp_val = -1; |
654 | do { |
655 | damage = max8997_assess_side_effect(rdev, new_val, best: &new_idx); |
656 | if (damage == 0) |
657 | goto out; |
658 | |
659 | if (tmp_dmg > damage) { |
660 | tmp_idx = new_idx; |
661 | tmp_val = new_val; |
662 | tmp_dmg = damage; |
663 | } |
664 | |
665 | new_val++; |
666 | } while (desc->min + desc->step * new_val <= desc->max); |
667 | |
668 | new_idx = tmp_idx; |
669 | new_val = tmp_val; |
670 | |
671 | if (max8997->ignore_gpiodvs_side_effect == false) |
672 | return -EINVAL; |
673 | |
674 | dev_warn(&rdev->dev, |
675 | "MAX8997 GPIO-DVS Side Effect Warning: GPIO SET: %d -> %d\n" , |
676 | max8997->buck125_gpioindex, tmp_idx); |
677 | |
678 | out: |
679 | if (new_idx < 0 || new_val < 0) |
680 | return -EINVAL; |
681 | |
682 | max8997->buck125_gpioindex = new_idx; |
683 | max8997_set_gpio(max8997); |
684 | *selector = new_val; |
685 | |
686 | return 0; |
687 | } |
688 | |
689 | /* For SAFEOUT1 and SAFEOUT2 */ |
690 | static int max8997_set_voltage_safeout_sel(struct regulator_dev *rdev, |
691 | unsigned selector) |
692 | { |
693 | struct max8997_data *max8997 = rdev_get_drvdata(rdev); |
694 | struct i2c_client *i2c = max8997->iodev->i2c; |
695 | int rid = rdev_get_id(rdev); |
696 | int reg, shift = 0, mask, ret; |
697 | |
698 | if (rid != MAX8997_ESAFEOUT1 && rid != MAX8997_ESAFEOUT2) |
699 | return -EINVAL; |
700 | |
701 | ret = max8997_get_voltage_register(rdev, reg: ®, shift: &shift, mask: &mask); |
702 | if (ret) |
703 | return ret; |
704 | |
705 | return max8997_update_reg(i2c, reg, val: selector << shift, mask: mask << shift); |
706 | } |
707 | |
708 | static int max8997_reg_disable_suspend(struct regulator_dev *rdev) |
709 | { |
710 | struct max8997_data *max8997 = rdev_get_drvdata(rdev); |
711 | struct i2c_client *i2c = max8997->iodev->i2c; |
712 | int ret, reg, mask, pattern; |
713 | int rid = rdev_get_id(rdev); |
714 | |
715 | ret = max8997_get_enable_register(rdev, reg: ®, mask: &mask, pattern: &pattern); |
716 | if (ret) |
717 | return ret; |
718 | |
719 | max8997_read_reg(i2c, reg, dest: &max8997->saved_states[rid]); |
720 | |
721 | if (rid == MAX8997_LDO1 || |
722 | rid == MAX8997_LDO10 || |
723 | rid == MAX8997_LDO21) { |
724 | dev_dbg(&rdev->dev, "Conditional Power-Off for %s\n" , |
725 | rdev->desc->name); |
726 | return max8997_update_reg(i2c, reg, val: 0x40, mask); |
727 | } |
728 | |
729 | dev_dbg(&rdev->dev, "Full Power-Off for %s (%xh -> %xh)\n" , |
730 | rdev->desc->name, max8997->saved_states[rid] & mask, |
731 | (~pattern) & mask); |
732 | return max8997_update_reg(i2c, reg, val: ~pattern, mask); |
733 | } |
734 | |
735 | static const struct regulator_ops max8997_ldo_ops = { |
736 | .list_voltage = max8997_list_voltage, |
737 | .is_enabled = max8997_reg_is_enabled, |
738 | .enable = max8997_reg_enable, |
739 | .disable = max8997_reg_disable, |
740 | .get_voltage_sel = max8997_get_voltage_sel, |
741 | .set_voltage = max8997_set_voltage_ldobuck, |
742 | .set_suspend_disable = max8997_reg_disable_suspend, |
743 | }; |
744 | |
745 | static const struct regulator_ops max8997_buck_ops = { |
746 | .list_voltage = max8997_list_voltage, |
747 | .is_enabled = max8997_reg_is_enabled, |
748 | .enable = max8997_reg_enable, |
749 | .disable = max8997_reg_disable, |
750 | .get_voltage_sel = max8997_get_voltage_sel, |
751 | .set_voltage = max8997_set_voltage_buck, |
752 | .set_voltage_time_sel = max8997_set_voltage_buck_time_sel, |
753 | .set_suspend_disable = max8997_reg_disable_suspend, |
754 | }; |
755 | |
756 | static const struct regulator_ops max8997_fixedvolt_ops = { |
757 | .list_voltage = max8997_list_voltage, |
758 | .is_enabled = max8997_reg_is_enabled, |
759 | .enable = max8997_reg_enable, |
760 | .disable = max8997_reg_disable, |
761 | .set_suspend_disable = max8997_reg_disable_suspend, |
762 | }; |
763 | |
764 | static const struct regulator_ops max8997_safeout_ops = { |
765 | .list_voltage = regulator_list_voltage_table, |
766 | .is_enabled = max8997_reg_is_enabled, |
767 | .enable = max8997_reg_enable, |
768 | .disable = max8997_reg_disable, |
769 | .get_voltage_sel = max8997_get_voltage_sel, |
770 | .set_voltage_sel = max8997_set_voltage_safeout_sel, |
771 | .set_suspend_disable = max8997_reg_disable_suspend, |
772 | }; |
773 | |
774 | static const struct regulator_ops max8997_fixedstate_ops = { |
775 | .list_voltage = max8997_list_voltage_charger_cv, |
776 | .get_voltage_sel = max8997_get_voltage_sel, |
777 | .set_voltage = max8997_set_voltage_charger_cv, |
778 | }; |
779 | |
780 | static int max8997_set_current_limit(struct regulator_dev *rdev, |
781 | int min_uA, int max_uA) |
782 | { |
783 | unsigned dummy; |
784 | int rid = rdev_get_id(rdev); |
785 | |
786 | if (rid != MAX8997_CHARGER && rid != MAX8997_CHARGER_TOPOFF) |
787 | return -EINVAL; |
788 | |
789 | /* Reuse max8997_set_voltage_ldobuck to set current_limit. */ |
790 | return max8997_set_voltage_ldobuck(rdev, min_uV: min_uA, max_uV: max_uA, selector: &dummy); |
791 | } |
792 | |
793 | static int max8997_get_current_limit(struct regulator_dev *rdev) |
794 | { |
795 | int sel, rid = rdev_get_id(rdev); |
796 | |
797 | if (rid != MAX8997_CHARGER && rid != MAX8997_CHARGER_TOPOFF) |
798 | return -EINVAL; |
799 | |
800 | sel = max8997_get_voltage_sel(rdev); |
801 | if (sel < 0) |
802 | return sel; |
803 | |
804 | /* Reuse max8997_list_voltage to get current_limit. */ |
805 | return max8997_list_voltage(rdev, selector: sel); |
806 | } |
807 | |
808 | static const struct regulator_ops max8997_charger_ops = { |
809 | .is_enabled = max8997_reg_is_enabled, |
810 | .enable = max8997_reg_enable, |
811 | .disable = max8997_reg_disable, |
812 | .get_current_limit = max8997_get_current_limit, |
813 | .set_current_limit = max8997_set_current_limit, |
814 | }; |
815 | |
816 | static const struct regulator_ops max8997_charger_fixedstate_ops = { |
817 | .get_current_limit = max8997_get_current_limit, |
818 | .set_current_limit = max8997_set_current_limit, |
819 | }; |
820 | |
821 | #define MAX8997_VOLTAGE_REGULATOR(_name, _ops) {\ |
822 | .name = #_name, \ |
823 | .id = MAX8997_##_name, \ |
824 | .ops = &_ops, \ |
825 | .type = REGULATOR_VOLTAGE, \ |
826 | .owner = THIS_MODULE, \ |
827 | } |
828 | |
829 | #define MAX8997_CURRENT_REGULATOR(_name, _ops) {\ |
830 | .name = #_name, \ |
831 | .id = MAX8997_##_name, \ |
832 | .ops = &_ops, \ |
833 | .type = REGULATOR_CURRENT, \ |
834 | .owner = THIS_MODULE, \ |
835 | } |
836 | |
837 | static struct regulator_desc regulators[] = { |
838 | MAX8997_VOLTAGE_REGULATOR(LDO1, max8997_ldo_ops), |
839 | MAX8997_VOLTAGE_REGULATOR(LDO2, max8997_ldo_ops), |
840 | MAX8997_VOLTAGE_REGULATOR(LDO3, max8997_ldo_ops), |
841 | MAX8997_VOLTAGE_REGULATOR(LDO4, max8997_ldo_ops), |
842 | MAX8997_VOLTAGE_REGULATOR(LDO5, max8997_ldo_ops), |
843 | MAX8997_VOLTAGE_REGULATOR(LDO6, max8997_ldo_ops), |
844 | MAX8997_VOLTAGE_REGULATOR(LDO7, max8997_ldo_ops), |
845 | MAX8997_VOLTAGE_REGULATOR(LDO8, max8997_ldo_ops), |
846 | MAX8997_VOLTAGE_REGULATOR(LDO9, max8997_ldo_ops), |
847 | MAX8997_VOLTAGE_REGULATOR(LDO10, max8997_ldo_ops), |
848 | MAX8997_VOLTAGE_REGULATOR(LDO11, max8997_ldo_ops), |
849 | MAX8997_VOLTAGE_REGULATOR(LDO12, max8997_ldo_ops), |
850 | MAX8997_VOLTAGE_REGULATOR(LDO13, max8997_ldo_ops), |
851 | MAX8997_VOLTAGE_REGULATOR(LDO14, max8997_ldo_ops), |
852 | MAX8997_VOLTAGE_REGULATOR(LDO15, max8997_ldo_ops), |
853 | MAX8997_VOLTAGE_REGULATOR(LDO16, max8997_ldo_ops), |
854 | MAX8997_VOLTAGE_REGULATOR(LDO17, max8997_ldo_ops), |
855 | MAX8997_VOLTAGE_REGULATOR(LDO18, max8997_ldo_ops), |
856 | MAX8997_VOLTAGE_REGULATOR(LDO21, max8997_ldo_ops), |
857 | MAX8997_VOLTAGE_REGULATOR(BUCK1, max8997_buck_ops), |
858 | MAX8997_VOLTAGE_REGULATOR(BUCK2, max8997_buck_ops), |
859 | MAX8997_VOLTAGE_REGULATOR(BUCK3, max8997_buck_ops), |
860 | MAX8997_VOLTAGE_REGULATOR(BUCK4, max8997_buck_ops), |
861 | MAX8997_VOLTAGE_REGULATOR(BUCK5, max8997_buck_ops), |
862 | MAX8997_VOLTAGE_REGULATOR(BUCK6, max8997_fixedvolt_ops), |
863 | MAX8997_VOLTAGE_REGULATOR(BUCK7, max8997_buck_ops), |
864 | MAX8997_VOLTAGE_REGULATOR(EN32KHZ_AP, max8997_fixedvolt_ops), |
865 | MAX8997_VOLTAGE_REGULATOR(EN32KHZ_CP, max8997_fixedvolt_ops), |
866 | MAX8997_VOLTAGE_REGULATOR(ENVICHG, max8997_fixedvolt_ops), |
867 | MAX8997_VOLTAGE_REGULATOR(ESAFEOUT1, max8997_safeout_ops), |
868 | MAX8997_VOLTAGE_REGULATOR(ESAFEOUT2, max8997_safeout_ops), |
869 | MAX8997_VOLTAGE_REGULATOR(CHARGER_CV, max8997_fixedstate_ops), |
870 | MAX8997_CURRENT_REGULATOR(CHARGER, max8997_charger_ops), |
871 | MAX8997_CURRENT_REGULATOR(CHARGER_TOPOFF, |
872 | max8997_charger_fixedstate_ops), |
873 | }; |
874 | |
875 | #ifdef CONFIG_OF |
876 | static int max8997_pmic_dt_parse_dvs_gpio(struct platform_device *pdev, |
877 | struct max8997_platform_data *pdata, |
878 | struct device_node *pmic_np) |
879 | { |
880 | int i, gpio; |
881 | |
882 | for (i = 0; i < 3; i++) { |
883 | gpio = of_get_named_gpio(np: pmic_np, |
884 | list_name: "max8997,pmic-buck125-dvs-gpios" , index: i); |
885 | if (!gpio_is_valid(number: gpio)) { |
886 | dev_err(&pdev->dev, "invalid gpio[%d]: %d\n" , i, gpio); |
887 | return -EINVAL; |
888 | } |
889 | pdata->buck125_gpios[i] = gpio; |
890 | } |
891 | return 0; |
892 | } |
893 | |
894 | static int max8997_pmic_dt_parse_pdata(struct platform_device *pdev, |
895 | struct max8997_platform_data *pdata) |
896 | { |
897 | struct max8997_dev *iodev = dev_get_drvdata(dev: pdev->dev.parent); |
898 | struct device_node *pmic_np, *regulators_np, *reg_np; |
899 | struct max8997_regulator_data *rdata; |
900 | unsigned int i, dvs_voltage_nr = 1, ret; |
901 | |
902 | pmic_np = iodev->dev->of_node; |
903 | if (!pmic_np) { |
904 | dev_err(&pdev->dev, "could not find pmic sub-node\n" ); |
905 | return -ENODEV; |
906 | } |
907 | |
908 | regulators_np = of_get_child_by_name(node: pmic_np, name: "regulators" ); |
909 | if (!regulators_np) { |
910 | dev_err(&pdev->dev, "could not find regulators sub-node\n" ); |
911 | return -EINVAL; |
912 | } |
913 | |
914 | /* count the number of regulators to be supported in pmic */ |
915 | pdata->num_regulators = of_get_child_count(np: regulators_np); |
916 | |
917 | rdata = devm_kcalloc(dev: &pdev->dev, |
918 | n: pdata->num_regulators, size: sizeof(*rdata), |
919 | GFP_KERNEL); |
920 | if (!rdata) { |
921 | of_node_put(node: regulators_np); |
922 | return -ENOMEM; |
923 | } |
924 | |
925 | pdata->regulators = rdata; |
926 | for_each_child_of_node(regulators_np, reg_np) { |
927 | for (i = 0; i < ARRAY_SIZE(regulators); i++) |
928 | if (of_node_name_eq(np: reg_np, name: regulators[i].name)) |
929 | break; |
930 | |
931 | if (i == ARRAY_SIZE(regulators)) { |
932 | dev_warn(&pdev->dev, "don't know how to configure regulator %pOFn\n" , |
933 | reg_np); |
934 | continue; |
935 | } |
936 | |
937 | rdata->id = i; |
938 | rdata->initdata = of_get_regulator_init_data(dev: &pdev->dev, |
939 | node: reg_np, |
940 | desc: ®ulators[i]); |
941 | rdata->reg_node = reg_np; |
942 | rdata++; |
943 | } |
944 | of_node_put(node: regulators_np); |
945 | |
946 | pdata->buck1_gpiodvs = of_property_read_bool(np: pmic_np, propname: "max8997,pmic-buck1-uses-gpio-dvs" ); |
947 | pdata->buck2_gpiodvs = of_property_read_bool(np: pmic_np, propname: "max8997,pmic-buck2-uses-gpio-dvs" ); |
948 | pdata->buck5_gpiodvs = of_property_read_bool(np: pmic_np, propname: "max8997,pmic-buck5-uses-gpio-dvs" ); |
949 | |
950 | if (pdata->buck1_gpiodvs || pdata->buck2_gpiodvs || |
951 | pdata->buck5_gpiodvs) { |
952 | ret = max8997_pmic_dt_parse_dvs_gpio(pdev, pdata, pmic_np); |
953 | if (ret) |
954 | return -EINVAL; |
955 | |
956 | if (of_property_read_u32(np: pmic_np, |
957 | propname: "max8997,pmic-buck125-default-dvs-idx" , |
958 | out_value: &pdata->buck125_default_idx)) { |
959 | pdata->buck125_default_idx = 0; |
960 | } else { |
961 | if (pdata->buck125_default_idx >= 8) { |
962 | pdata->buck125_default_idx = 0; |
963 | dev_info(&pdev->dev, "invalid value for default dvs index, using 0 instead\n" ); |
964 | } |
965 | } |
966 | |
967 | if (of_get_property(node: pmic_np, |
968 | name: "max8997,pmic-ignore-gpiodvs-side-effect" , NULL)) |
969 | pdata->ignore_gpiodvs_side_effect = true; |
970 | |
971 | dvs_voltage_nr = 8; |
972 | } |
973 | |
974 | if (of_property_read_u32_array(np: pmic_np, |
975 | propname: "max8997,pmic-buck1-dvs-voltage" , |
976 | out_values: pdata->buck1_voltage, sz: dvs_voltage_nr)) { |
977 | dev_err(&pdev->dev, "buck1 voltages not specified\n" ); |
978 | return -EINVAL; |
979 | } |
980 | |
981 | if (of_property_read_u32_array(np: pmic_np, |
982 | propname: "max8997,pmic-buck2-dvs-voltage" , |
983 | out_values: pdata->buck2_voltage, sz: dvs_voltage_nr)) { |
984 | dev_err(&pdev->dev, "buck2 voltages not specified\n" ); |
985 | return -EINVAL; |
986 | } |
987 | |
988 | if (of_property_read_u32_array(np: pmic_np, |
989 | propname: "max8997,pmic-buck5-dvs-voltage" , |
990 | out_values: pdata->buck5_voltage, sz: dvs_voltage_nr)) { |
991 | dev_err(&pdev->dev, "buck5 voltages not specified\n" ); |
992 | return -EINVAL; |
993 | } |
994 | |
995 | return 0; |
996 | } |
997 | #else |
998 | static int max8997_pmic_dt_parse_pdata(struct platform_device *pdev, |
999 | struct max8997_platform_data *pdata) |
1000 | { |
1001 | return 0; |
1002 | } |
1003 | #endif /* CONFIG_OF */ |
1004 | |
1005 | static int max8997_pmic_probe(struct platform_device *pdev) |
1006 | { |
1007 | struct max8997_dev *iodev = dev_get_drvdata(dev: pdev->dev.parent); |
1008 | struct max8997_platform_data *pdata = iodev->pdata; |
1009 | struct regulator_config config = { }; |
1010 | struct regulator_dev *rdev; |
1011 | struct max8997_data *max8997; |
1012 | struct i2c_client *i2c; |
1013 | int i, ret, nr_dvs; |
1014 | u8 max_buck1 = 0, max_buck2 = 0, max_buck5 = 0; |
1015 | |
1016 | if (!pdata) { |
1017 | dev_err(&pdev->dev, "No platform init data supplied.\n" ); |
1018 | return -ENODEV; |
1019 | } |
1020 | |
1021 | if (iodev->dev->of_node) { |
1022 | ret = max8997_pmic_dt_parse_pdata(pdev, pdata); |
1023 | if (ret) |
1024 | return ret; |
1025 | } |
1026 | |
1027 | max8997 = devm_kzalloc(dev: &pdev->dev, size: sizeof(struct max8997_data), |
1028 | GFP_KERNEL); |
1029 | if (!max8997) |
1030 | return -ENOMEM; |
1031 | |
1032 | max8997->dev = &pdev->dev; |
1033 | max8997->iodev = iodev; |
1034 | max8997->num_regulators = pdata->num_regulators; |
1035 | platform_set_drvdata(pdev, data: max8997); |
1036 | i2c = max8997->iodev->i2c; |
1037 | |
1038 | max8997->buck125_gpioindex = pdata->buck125_default_idx; |
1039 | max8997->buck1_gpiodvs = pdata->buck1_gpiodvs; |
1040 | max8997->buck2_gpiodvs = pdata->buck2_gpiodvs; |
1041 | max8997->buck5_gpiodvs = pdata->buck5_gpiodvs; |
1042 | memcpy(max8997->buck125_gpios, pdata->buck125_gpios, sizeof(int) * 3); |
1043 | max8997->ignore_gpiodvs_side_effect = pdata->ignore_gpiodvs_side_effect; |
1044 | |
1045 | nr_dvs = (pdata->buck1_gpiodvs || pdata->buck2_gpiodvs || |
1046 | pdata->buck5_gpiodvs) ? 8 : 1; |
1047 | |
1048 | for (i = 0; i < nr_dvs; i++) { |
1049 | max8997->buck1_vol[i] = ret = |
1050 | max8997_get_voltage_proper_val( |
1051 | desc: &buck1245_voltage_map_desc, |
1052 | min_vol: pdata->buck1_voltage[i], |
1053 | max_vol: pdata->buck1_voltage[i] + |
1054 | buck1245_voltage_map_desc.step); |
1055 | if (ret < 0) |
1056 | return ret; |
1057 | |
1058 | max8997->buck2_vol[i] = ret = |
1059 | max8997_get_voltage_proper_val( |
1060 | desc: &buck1245_voltage_map_desc, |
1061 | min_vol: pdata->buck2_voltage[i], |
1062 | max_vol: pdata->buck2_voltage[i] + |
1063 | buck1245_voltage_map_desc.step); |
1064 | if (ret < 0) |
1065 | return ret; |
1066 | |
1067 | max8997->buck5_vol[i] = ret = |
1068 | max8997_get_voltage_proper_val( |
1069 | desc: &buck1245_voltage_map_desc, |
1070 | min_vol: pdata->buck5_voltage[i], |
1071 | max_vol: pdata->buck5_voltage[i] + |
1072 | buck1245_voltage_map_desc.step); |
1073 | if (ret < 0) |
1074 | return ret; |
1075 | |
1076 | if (max_buck1 < max8997->buck1_vol[i]) |
1077 | max_buck1 = max8997->buck1_vol[i]; |
1078 | if (max_buck2 < max8997->buck2_vol[i]) |
1079 | max_buck2 = max8997->buck2_vol[i]; |
1080 | if (max_buck5 < max8997->buck5_vol[i]) |
1081 | max_buck5 = max8997->buck5_vol[i]; |
1082 | } |
1083 | |
1084 | /* For the safety, set max voltage before setting up */ |
1085 | for (i = 0; i < 8; i++) { |
1086 | max8997_update_reg(i2c, reg: MAX8997_REG_BUCK1DVS1 + i, |
1087 | val: max_buck1, mask: 0x3f); |
1088 | max8997_update_reg(i2c, reg: MAX8997_REG_BUCK2DVS1 + i, |
1089 | val: max_buck2, mask: 0x3f); |
1090 | max8997_update_reg(i2c, reg: MAX8997_REG_BUCK5DVS1 + i, |
1091 | val: max_buck5, mask: 0x3f); |
1092 | } |
1093 | |
1094 | /* Initialize all the DVS related BUCK registers */ |
1095 | for (i = 0; i < nr_dvs; i++) { |
1096 | max8997_update_reg(i2c, reg: MAX8997_REG_BUCK1DVS1 + i, |
1097 | val: max8997->buck1_vol[i], |
1098 | mask: 0x3f); |
1099 | max8997_update_reg(i2c, reg: MAX8997_REG_BUCK2DVS1 + i, |
1100 | val: max8997->buck2_vol[i], |
1101 | mask: 0x3f); |
1102 | max8997_update_reg(i2c, reg: MAX8997_REG_BUCK5DVS1 + i, |
1103 | val: max8997->buck5_vol[i], |
1104 | mask: 0x3f); |
1105 | } |
1106 | |
1107 | /* |
1108 | * If buck 1, 2, and 5 do not care DVS GPIO settings, ignore them. |
1109 | * If at least one of them cares, set gpios. |
1110 | */ |
1111 | if (pdata->buck1_gpiodvs || pdata->buck2_gpiodvs || |
1112 | pdata->buck5_gpiodvs) { |
1113 | |
1114 | if (!gpio_is_valid(number: pdata->buck125_gpios[0]) || |
1115 | !gpio_is_valid(number: pdata->buck125_gpios[1]) || |
1116 | !gpio_is_valid(number: pdata->buck125_gpios[2])) { |
1117 | dev_err(&pdev->dev, "GPIO NOT VALID\n" ); |
1118 | return -EINVAL; |
1119 | } |
1120 | |
1121 | ret = devm_gpio_request(dev: &pdev->dev, gpio: pdata->buck125_gpios[0], |
1122 | label: "MAX8997 SET1" ); |
1123 | if (ret) |
1124 | return ret; |
1125 | |
1126 | ret = devm_gpio_request(dev: &pdev->dev, gpio: pdata->buck125_gpios[1], |
1127 | label: "MAX8997 SET2" ); |
1128 | if (ret) |
1129 | return ret; |
1130 | |
1131 | ret = devm_gpio_request(dev: &pdev->dev, gpio: pdata->buck125_gpios[2], |
1132 | label: "MAX8997 SET3" ); |
1133 | if (ret) |
1134 | return ret; |
1135 | |
1136 | gpio_direction_output(gpio: pdata->buck125_gpios[0], |
1137 | value: (max8997->buck125_gpioindex >> 2) |
1138 | & 0x1); /* SET1 */ |
1139 | gpio_direction_output(gpio: pdata->buck125_gpios[1], |
1140 | value: (max8997->buck125_gpioindex >> 1) |
1141 | & 0x1); /* SET2 */ |
1142 | gpio_direction_output(gpio: pdata->buck125_gpios[2], |
1143 | value: (max8997->buck125_gpioindex >> 0) |
1144 | & 0x1); /* SET3 */ |
1145 | } |
1146 | |
1147 | /* DVS-GPIO disabled */ |
1148 | max8997_update_reg(i2c, reg: MAX8997_REG_BUCK1CTRL, val: (pdata->buck1_gpiodvs) ? |
1149 | (1 << 1) : (0 << 1), mask: 1 << 1); |
1150 | max8997_update_reg(i2c, reg: MAX8997_REG_BUCK2CTRL, val: (pdata->buck2_gpiodvs) ? |
1151 | (1 << 1) : (0 << 1), mask: 1 << 1); |
1152 | max8997_update_reg(i2c, reg: MAX8997_REG_BUCK5CTRL, val: (pdata->buck5_gpiodvs) ? |
1153 | (1 << 1) : (0 << 1), mask: 1 << 1); |
1154 | |
1155 | /* Misc Settings */ |
1156 | max8997->ramp_delay = 10; /* set 10mV/us, which is the default */ |
1157 | max8997_write_reg(i2c, reg: MAX8997_REG_BUCKRAMP, value: (0xf << 4) | 0x9); |
1158 | |
1159 | for (i = 0; i < pdata->num_regulators; i++) { |
1160 | const struct voltage_map_desc *desc; |
1161 | int id = pdata->regulators[i].id; |
1162 | |
1163 | desc = reg_voltage_map[id]; |
1164 | if (desc) { |
1165 | regulators[id].n_voltages = |
1166 | (desc->max - desc->min) / desc->step + 1; |
1167 | } else if (id == MAX8997_ESAFEOUT1 || id == MAX8997_ESAFEOUT2) { |
1168 | regulators[id].volt_table = safeoutvolt; |
1169 | regulators[id].n_voltages = ARRAY_SIZE(safeoutvolt); |
1170 | } else if (id == MAX8997_CHARGER_CV) { |
1171 | regulators[id].n_voltages = 16; |
1172 | } |
1173 | |
1174 | config.dev = max8997->dev; |
1175 | config.init_data = pdata->regulators[i].initdata; |
1176 | config.driver_data = max8997; |
1177 | config.of_node = pdata->regulators[i].reg_node; |
1178 | |
1179 | rdev = devm_regulator_register(dev: &pdev->dev, regulator_desc: ®ulators[id], |
1180 | config: &config); |
1181 | if (IS_ERR(ptr: rdev)) { |
1182 | dev_err(max8997->dev, "regulator init failed for %d\n" , |
1183 | id); |
1184 | return PTR_ERR(ptr: rdev); |
1185 | } |
1186 | } |
1187 | |
1188 | return 0; |
1189 | } |
1190 | |
1191 | static const struct platform_device_id max8997_pmic_id[] = { |
1192 | { "max8997-pmic" , 0}, |
1193 | { }, |
1194 | }; |
1195 | MODULE_DEVICE_TABLE(platform, max8997_pmic_id); |
1196 | |
1197 | static struct platform_driver max8997_pmic_driver = { |
1198 | .driver = { |
1199 | .name = "max8997-pmic" , |
1200 | .probe_type = PROBE_PREFER_ASYNCHRONOUS, |
1201 | }, |
1202 | .probe = max8997_pmic_probe, |
1203 | .id_table = max8997_pmic_id, |
1204 | }; |
1205 | |
1206 | static int __init max8997_pmic_init(void) |
1207 | { |
1208 | return platform_driver_register(&max8997_pmic_driver); |
1209 | } |
1210 | subsys_initcall(max8997_pmic_init); |
1211 | |
1212 | static void __exit max8997_pmic_cleanup(void) |
1213 | { |
1214 | platform_driver_unregister(&max8997_pmic_driver); |
1215 | } |
1216 | module_exit(max8997_pmic_cleanup); |
1217 | |
1218 | MODULE_DESCRIPTION("MAXIM 8997/8966 Regulator Driver" ); |
1219 | MODULE_AUTHOR("MyungJoo Ham <myungjoo.ham@samsung.com>" ); |
1220 | MODULE_LICENSE("GPL" ); |
1221 | |