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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(max8997->buck125_gpios[0], set1); | |
56 | gpio_set_value(max8997->buck125_gpios[1], set2); | |
57 | gpio_set_value(max8997->buck125_gpios[2], 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, ®, &mask, &pattern); | |
250 | if (ret) | |
251 | return ret; | |
252 | ||
253 | ret = max8997_read_reg(i2c, reg, &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, ®, &mask, &pattern); | |
267 | if (ret) | |
268 | return ret; | |
269 | ||
270 | return max8997_update_reg(i2c, reg, 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, ®, &mask, &pattern); | |
280 | if (ret) | |
281 | return ret; | |
282 | ||
283 | return max8997_update_reg(i2c, reg, ~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, ®, &shift, &mask); | |
360 | if (ret) | |
361 | return ret; | |
362 | ||
363 | ret = max8997_read_reg(i2c, reg, &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, ®, &shift, &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 << 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_uV, max_uV); | |
477 | if (i < 0) | |
478 | return i; | |
479 | ||
480 | ret = max8997_get_voltage_register(rdev, ®, &shift, &mask); | |
481 | if (ret) | |
482 | return ret; | |
483 | ||
484 | ret = max8997_update_reg(i2c, reg, i << shift, 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_uV, 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, &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, ®, &shift, &mask); | |
702 | if (ret) | |
703 | return ret; | |
704 | ||
705 | return max8997_update_reg(i2c, reg, selector << shift, 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, ®, &mask, &pattern); | |
716 | if (ret) | |
717 | return ret; | |
718 | ||
719 | max8997_read_reg(i2c, reg, &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, 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, ~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_uA, max_uA, &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, 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(pmic_np, | |
884 | "max8997,pmic-buck125-dvs-gpios", i); | |
885 | if (!gpio_is_valid(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(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(pmic_np, "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(regulators_np); | |
916 | ||
917 | rdata = devm_kcalloc(&pdev->dev, | |
918 | pdata->num_regulators, sizeof(*rdata), | |
919 | GFP_KERNEL); | |
920 | if (!rdata) { | |
921 | of_node_put(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(reg_np, 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(&pdev->dev, | |
939 | reg_np, | |
940 | ®ulators[i]); | |
941 | rdata->reg_node = reg_np; | |
942 | rdata++; | |
943 | } | |
944 | of_node_put(regulators_np); | |
945 | ||
946 | if (of_get_property(pmic_np, "max8997,pmic-buck1-uses-gpio-dvs", NULL)) | |
947 | pdata->buck1_gpiodvs = true; | |
948 | ||
949 | if (of_get_property(pmic_np, "max8997,pmic-buck2-uses-gpio-dvs", NULL)) | |
950 | pdata->buck2_gpiodvs = true; | |
951 | ||
952 | if (of_get_property(pmic_np, "max8997,pmic-buck5-uses-gpio-dvs", NULL)) | |
953 | pdata->buck5_gpiodvs = true; | |
954 | ||
955 | if (pdata->buck1_gpiodvs || pdata->buck2_gpiodvs || | |
956 | pdata->buck5_gpiodvs) { | |
957 | ret = max8997_pmic_dt_parse_dvs_gpio(pdev, pdata, pmic_np); | |
958 | if (ret) | |
959 | return -EINVAL; | |
960 | ||
961 | if (of_property_read_u32(pmic_np, | |
962 | "max8997,pmic-buck125-default-dvs-idx", | |
963 | &pdata->buck125_default_idx)) { | |
964 | pdata->buck125_default_idx = 0; | |
965 | } else { | |
966 | if (pdata->buck125_default_idx >= 8) { | |
967 | pdata->buck125_default_idx = 0; | |
968 | dev_info(&pdev->dev, "invalid value for default dvs index, using 0 instead\n"); | |
969 | } | |
970 | } | |
971 | ||
972 | if (of_get_property(pmic_np, | |
973 | "max8997,pmic-ignore-gpiodvs-side-effect", NULL)) | |
974 | pdata->ignore_gpiodvs_side_effect = true; | |
975 | ||
976 | dvs_voltage_nr = 8; | |
977 | } | |
978 | ||
979 | if (of_property_read_u32_array(pmic_np, | |
980 | "max8997,pmic-buck1-dvs-voltage", | |
981 | pdata->buck1_voltage, dvs_voltage_nr)) { | |
982 | dev_err(&pdev->dev, "buck1 voltages not specified\n"); | |
983 | return -EINVAL; | |
984 | } | |
985 | ||
986 | if (of_property_read_u32_array(pmic_np, | |
987 | "max8997,pmic-buck2-dvs-voltage", | |
988 | pdata->buck2_voltage, dvs_voltage_nr)) { | |
989 | dev_err(&pdev->dev, "buck2 voltages not specified\n"); | |
990 | return -EINVAL; | |
991 | } | |
992 | ||
993 | if (of_property_read_u32_array(pmic_np, | |
994 | "max8997,pmic-buck5-dvs-voltage", | |
995 | pdata->buck5_voltage, dvs_voltage_nr)) { | |
996 | dev_err(&pdev->dev, "buck5 voltages not specified\n"); | |
997 | return -EINVAL; | |
998 | } | |
999 | ||
1000 | return 0; | |
1001 | } | |
1002 | #else | |
1003 | static int max8997_pmic_dt_parse_pdata(struct platform_device *pdev, | |
1004 | struct max8997_platform_data *pdata) | |
1005 | { | |
1006 | return 0; | |
1007 | } | |
1008 | #endif /* CONFIG_OF */ | |
1009 | ||
1010 | static int max8997_pmic_probe(struct platform_device *pdev) | |
1011 | { | |
1012 | struct max8997_dev *iodev = dev_get_drvdata(pdev->dev.parent); | |
1013 | struct max8997_platform_data *pdata = iodev->pdata; | |
1014 | struct regulator_config config = { }; | |
1015 | struct regulator_dev *rdev; | |
1016 | struct max8997_data *max8997; | |
1017 | struct i2c_client *i2c; | |
1018 | int i, ret, nr_dvs; | |
1019 | u8 max_buck1 = 0, max_buck2 = 0, max_buck5 = 0; | |
1020 | ||
1021 | if (!pdata) { | |
1022 | dev_err(&pdev->dev, "No platform init data supplied.\n"); | |
1023 | return -ENODEV; | |
1024 | } | |
1025 | ||
1026 | if (iodev->dev->of_node) { | |
1027 | ret = max8997_pmic_dt_parse_pdata(pdev, pdata); | |
1028 | if (ret) | |
1029 | return ret; | |
1030 | } | |
1031 | ||
1032 | max8997 = devm_kzalloc(&pdev->dev, sizeof(struct max8997_data), | |
1033 | GFP_KERNEL); | |
1034 | if (!max8997) | |
1035 | return -ENOMEM; | |
1036 | ||
1037 | max8997->dev = &pdev->dev; | |
1038 | max8997->iodev = iodev; | |
1039 | max8997->num_regulators = pdata->num_regulators; | |
1040 | platform_set_drvdata(pdev, max8997); | |
1041 | i2c = max8997->iodev->i2c; | |
1042 | ||
1043 | max8997->buck125_gpioindex = pdata->buck125_default_idx; | |
1044 | max8997->buck1_gpiodvs = pdata->buck1_gpiodvs; | |
1045 | max8997->buck2_gpiodvs = pdata->buck2_gpiodvs; | |
1046 | max8997->buck5_gpiodvs = pdata->buck5_gpiodvs; | |
1047 | memcpy(max8997->buck125_gpios, pdata->buck125_gpios, sizeof(int) * 3); | |
1048 | max8997->ignore_gpiodvs_side_effect = pdata->ignore_gpiodvs_side_effect; | |
1049 | ||
1050 | nr_dvs = (pdata->buck1_gpiodvs || pdata->buck2_gpiodvs || | |
1051 | pdata->buck5_gpiodvs) ? 8 : 1; | |
1052 | ||
1053 | for (i = 0; i < nr_dvs; i++) { | |
1054 | max8997->buck1_vol[i] = ret = | |
1055 | max8997_get_voltage_proper_val( | |
1056 | &buck1245_voltage_map_desc, | |
1057 | pdata->buck1_voltage[i], | |
1058 | pdata->buck1_voltage[i] + | |
1059 | buck1245_voltage_map_desc.step); | |
1060 | if (ret < 0) | |
1061 | return ret; | |
1062 | ||
1063 | max8997->buck2_vol[i] = ret = | |
1064 | max8997_get_voltage_proper_val( | |
1065 | &buck1245_voltage_map_desc, | |
1066 | pdata->buck2_voltage[i], | |
1067 | pdata->buck2_voltage[i] + | |
1068 | buck1245_voltage_map_desc.step); | |
1069 | if (ret < 0) | |
1070 | return ret; | |
1071 | ||
1072 | max8997->buck5_vol[i] = ret = | |
1073 | max8997_get_voltage_proper_val( | |
1074 | &buck1245_voltage_map_desc, | |
1075 | pdata->buck5_voltage[i], | |
1076 | pdata->buck5_voltage[i] + | |
1077 | buck1245_voltage_map_desc.step); | |
1078 | if (ret < 0) | |
1079 | return ret; | |
1080 | ||
1081 | if (max_buck1 < max8997->buck1_vol[i]) | |
1082 | max_buck1 = max8997->buck1_vol[i]; | |
1083 | if (max_buck2 < max8997->buck2_vol[i]) | |
1084 | max_buck2 = max8997->buck2_vol[i]; | |
1085 | if (max_buck5 < max8997->buck5_vol[i]) | |
1086 | max_buck5 = max8997->buck5_vol[i]; | |
1087 | } | |
1088 | ||
1089 | /* For the safety, set max voltage before setting up */ | |
1090 | for (i = 0; i < 8; i++) { | |
1091 | max8997_update_reg(i2c, MAX8997_REG_BUCK1DVS1 + i, | |
1092 | max_buck1, 0x3f); | |
1093 | max8997_update_reg(i2c, MAX8997_REG_BUCK2DVS1 + i, | |
1094 | max_buck2, 0x3f); | |
1095 | max8997_update_reg(i2c, MAX8997_REG_BUCK5DVS1 + i, | |
1096 | max_buck5, 0x3f); | |
1097 | } | |
1098 | ||
1099 | /* Initialize all the DVS related BUCK registers */ | |
1100 | for (i = 0; i < nr_dvs; i++) { | |
1101 | max8997_update_reg(i2c, MAX8997_REG_BUCK1DVS1 + i, | |
1102 | max8997->buck1_vol[i], | |
1103 | 0x3f); | |
1104 | max8997_update_reg(i2c, MAX8997_REG_BUCK2DVS1 + i, | |
1105 | max8997->buck2_vol[i], | |
1106 | 0x3f); | |
1107 | max8997_update_reg(i2c, MAX8997_REG_BUCK5DVS1 + i, | |
1108 | max8997->buck5_vol[i], | |
1109 | 0x3f); | |
1110 | } | |
1111 | ||
1112 | /* | |
1113 | * If buck 1, 2, and 5 do not care DVS GPIO settings, ignore them. | |
1114 | * If at least one of them cares, set gpios. | |
1115 | */ | |
1116 | if (pdata->buck1_gpiodvs || pdata->buck2_gpiodvs || | |
1117 | pdata->buck5_gpiodvs) { | |
1118 | ||
1119 | if (!gpio_is_valid(pdata->buck125_gpios[0]) || | |
1120 | !gpio_is_valid(pdata->buck125_gpios[1]) || | |
1121 | !gpio_is_valid(pdata->buck125_gpios[2])) { | |
1122 | dev_err(&pdev->dev, "GPIO NOT VALID\n"); | |
1123 | return -EINVAL; | |
1124 | } | |
1125 | ||
1126 | ret = devm_gpio_request(&pdev->dev, pdata->buck125_gpios[0], | |
1127 | "MAX8997 SET1"); | |
1128 | if (ret) | |
1129 | return ret; | |
1130 | ||
1131 | ret = devm_gpio_request(&pdev->dev, pdata->buck125_gpios[1], | |
1132 | "MAX8997 SET2"); | |
1133 | if (ret) | |
1134 | return ret; | |
1135 | ||
1136 | ret = devm_gpio_request(&pdev->dev, pdata->buck125_gpios[2], | |
1137 | "MAX8997 SET3"); | |
1138 | if (ret) | |
1139 | return ret; | |
1140 | ||
1141 | gpio_direction_output(pdata->buck125_gpios[0], | |
1142 | (max8997->buck125_gpioindex >> 2) | |
1143 | & 0x1); /* SET1 */ | |
1144 | gpio_direction_output(pdata->buck125_gpios[1], | |
1145 | (max8997->buck125_gpioindex >> 1) | |
1146 | & 0x1); /* SET2 */ | |
1147 | gpio_direction_output(pdata->buck125_gpios[2], | |
1148 | (max8997->buck125_gpioindex >> 0) | |
1149 | & 0x1); /* SET3 */ | |
1150 | } | |
1151 | ||
1152 | /* DVS-GPIO disabled */ | |
1153 | max8997_update_reg(i2c, MAX8997_REG_BUCK1CTRL, (pdata->buck1_gpiodvs) ? | |
1154 | (1 << 1) : (0 << 1), 1 << 1); | |
1155 | max8997_update_reg(i2c, MAX8997_REG_BUCK2CTRL, (pdata->buck2_gpiodvs) ? | |
1156 | (1 << 1) : (0 << 1), 1 << 1); | |
1157 | max8997_update_reg(i2c, MAX8997_REG_BUCK5CTRL, (pdata->buck5_gpiodvs) ? | |
1158 | (1 << 1) : (0 << 1), 1 << 1); | |
1159 | ||
1160 | /* Misc Settings */ | |
1161 | max8997->ramp_delay = 10; /* set 10mV/us, which is the default */ | |
1162 | max8997_write_reg(i2c, MAX8997_REG_BUCKRAMP, (0xf << 4) | 0x9); | |
1163 | ||
1164 | for (i = 0; i < pdata->num_regulators; i++) { | |
1165 | const struct voltage_map_desc *desc; | |
1166 | int id = pdata->regulators[i].id; | |
1167 | ||
1168 | desc = reg_voltage_map[id]; | |
1169 | if (desc) { | |
1170 | regulators[id].n_voltages = | |
1171 | (desc->max - desc->min) / desc->step + 1; | |
1172 | } else if (id == MAX8997_ESAFEOUT1 || id == MAX8997_ESAFEOUT2) { | |
1173 | regulators[id].volt_table = safeoutvolt; | |
1174 | regulators[id].n_voltages = ARRAY_SIZE(safeoutvolt); | |
1175 | } else if (id == MAX8997_CHARGER_CV) { | |
1176 | regulators[id].n_voltages = 16; | |
1177 | } | |
1178 | ||
1179 | config.dev = max8997->dev; | |
1180 | config.init_data = pdata->regulators[i].initdata; | |
1181 | config.driver_data = max8997; | |
1182 | config.of_node = pdata->regulators[i].reg_node; | |
1183 | ||
1184 | rdev = devm_regulator_register(&pdev->dev, ®ulators[id], | |
1185 | &config); | |
1186 | if (IS_ERR(rdev)) { | |
1187 | dev_err(max8997->dev, "regulator init failed for %d\n", | |
1188 | id); | |
1189 | return PTR_ERR(rdev); | |
1190 | } | |
1191 | } | |
1192 | ||
1193 | return 0; | |
1194 | } | |
1195 | ||
1196 | static const struct platform_device_id max8997_pmic_id[] = { | |
1197 | { "max8997-pmic", 0}, | |
1198 | { }, | |
1199 | }; | |
1200 | MODULE_DEVICE_TABLE(platform, max8997_pmic_id); | |
1201 | ||
1202 | static struct platform_driver max8997_pmic_driver = { | |
1203 | .driver = { | |
1204 | .name = "max8997-pmic", | |
1205 | }, | |
1206 | .probe = max8997_pmic_probe, | |
1207 | .id_table = max8997_pmic_id, | |
1208 | }; | |
1209 | ||
1210 | static int __init max8997_pmic_init(void) | |
1211 | { | |
1212 | return platform_driver_register(&max8997_pmic_driver); | |
1213 | } | |
1214 | subsys_initcall(max8997_pmic_init); | |
1215 | ||
1216 | static void __exit max8997_pmic_cleanup(void) | |
1217 | { | |
1218 | platform_driver_unregister(&max8997_pmic_driver); | |
1219 | } | |
1220 | module_exit(max8997_pmic_cleanup); | |
1221 | ||
1222 | MODULE_DESCRIPTION("MAXIM 8997/8966 Regulator Driver"); | |
1223 | MODULE_AUTHOR("MyungJoo Ham <myungjoo.ham@samsung.com>"); | |
1224 | MODULE_LICENSE("GPL"); |