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bd6ca2cf MH |
1 | /* |
2 | * max8997.c - Regulator driver for the Maxim 8997/8966 | |
3 | * | |
4 | * Copyright (C) 2011 Samsung Electronics | |
5 | * MyungJoo Ham <myungjoo.ham@smasung.com> | |
6 | * | |
7 | * This program is free software; you can redistribute it and/or modify | |
8 | * it under the terms of the GNU General Public License as published by | |
9 | * the Free Software Foundation; either version 2 of the License, or | |
10 | * (at your option) any later version. | |
11 | * | |
12 | * This program is distributed in the hope that it will be useful, | |
13 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
14 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
15 | * GNU General Public License for more details. | |
16 | * | |
17 | * You should have received a copy of the GNU General Public License | |
18 | * along with this program; if not, write to the Free Software | |
19 | * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA | |
20 | * | |
21 | * This driver is based on max8998.c | |
22 | */ | |
23 | ||
24 | #include <linux/bug.h> | |
bd6ca2cf MH |
25 | #include <linux/err.h> |
26 | #include <linux/gpio.h> | |
77b71b37 | 27 | #include <linux/of_gpio.h> |
bd6ca2cf | 28 | #include <linux/slab.h> |
65602c32 | 29 | #include <linux/module.h> |
bd6ca2cf MH |
30 | #include <linux/platform_device.h> |
31 | #include <linux/regulator/driver.h> | |
32 | #include <linux/regulator/machine.h> | |
33 | #include <linux/mfd/max8997.h> | |
34 | #include <linux/mfd/max8997-private.h> | |
77b71b37 | 35 | #include <linux/regulator/of_regulator.h> |
bd6ca2cf MH |
36 | |
37 | struct max8997_data { | |
38 | struct device *dev; | |
39 | struct max8997_dev *iodev; | |
40 | int num_regulators; | |
41 | struct regulator_dev **rdev; | |
42 | int ramp_delay; /* in mV/us */ | |
43 | ||
6e0414a5 MH |
44 | bool buck1_gpiodvs; |
45 | bool buck2_gpiodvs; | |
46 | bool buck5_gpiodvs; | |
bd6ca2cf MH |
47 | u8 buck1_vol[8]; |
48 | u8 buck2_vol[8]; | |
49 | u8 buck5_vol[8]; | |
6e0414a5 | 50 | int buck125_gpios[3]; |
bd6ca2cf | 51 | int buck125_gpioindex; |
6e0414a5 | 52 | bool ignore_gpiodvs_side_effect; |
bd6ca2cf MH |
53 | |
54 | u8 saved_states[MAX8997_REG_MAX]; | |
55 | }; | |
56 | ||
57 | static inline void max8997_set_gpio(struct max8997_data *max8997) | |
58 | { | |
bd6ca2cf MH |
59 | int set3 = (max8997->buck125_gpioindex) & 0x1; |
60 | int set2 = ((max8997->buck125_gpioindex) >> 1) & 0x1; | |
61 | int set1 = ((max8997->buck125_gpioindex) >> 2) & 0x1; | |
62 | ||
6e0414a5 MH |
63 | gpio_set_value(max8997->buck125_gpios[0], set1); |
64 | gpio_set_value(max8997->buck125_gpios[1], set2); | |
65 | gpio_set_value(max8997->buck125_gpios[2], set3); | |
bd6ca2cf MH |
66 | } |
67 | ||
68 | struct voltage_map_desc { | |
69 | int min; | |
70 | int max; | |
71 | int step; | |
bd6ca2cf MH |
72 | }; |
73 | ||
bc3b7756 | 74 | /* Voltage maps in uV */ |
bd6ca2cf | 75 | static const struct voltage_map_desc ldo_voltage_map_desc = { |
bc3b7756 | 76 | .min = 800000, .max = 3950000, .step = 50000, |
bd6ca2cf MH |
77 | }; /* LDO1 ~ 18, 21 all */ |
78 | ||
79 | static const struct voltage_map_desc buck1245_voltage_map_desc = { | |
bc3b7756 | 80 | .min = 650000, .max = 2225000, .step = 25000, |
bd6ca2cf MH |
81 | }; /* Buck1, 2, 4, 5 */ |
82 | ||
83 | static const struct voltage_map_desc buck37_voltage_map_desc = { | |
bc3b7756 | 84 | .min = 750000, .max = 3900000, .step = 50000, |
bd6ca2cf MH |
85 | }; /* Buck3, 7 */ |
86 | ||
bc3b7756 | 87 | /* current map in uA */ |
bd6ca2cf | 88 | static const struct voltage_map_desc charger_current_map_desc = { |
bc3b7756 | 89 | .min = 200000, .max = 950000, .step = 50000, |
bd6ca2cf MH |
90 | }; |
91 | ||
92 | static const struct voltage_map_desc topoff_current_map_desc = { | |
bc3b7756 | 93 | .min = 50000, .max = 200000, .step = 10000, |
bd6ca2cf MH |
94 | }; |
95 | ||
96 | static const struct voltage_map_desc *reg_voltage_map[] = { | |
97 | [MAX8997_LDO1] = &ldo_voltage_map_desc, | |
98 | [MAX8997_LDO2] = &ldo_voltage_map_desc, | |
99 | [MAX8997_LDO3] = &ldo_voltage_map_desc, | |
100 | [MAX8997_LDO4] = &ldo_voltage_map_desc, | |
101 | [MAX8997_LDO5] = &ldo_voltage_map_desc, | |
102 | [MAX8997_LDO6] = &ldo_voltage_map_desc, | |
103 | [MAX8997_LDO7] = &ldo_voltage_map_desc, | |
104 | [MAX8997_LDO8] = &ldo_voltage_map_desc, | |
105 | [MAX8997_LDO9] = &ldo_voltage_map_desc, | |
106 | [MAX8997_LDO10] = &ldo_voltage_map_desc, | |
107 | [MAX8997_LDO11] = &ldo_voltage_map_desc, | |
108 | [MAX8997_LDO12] = &ldo_voltage_map_desc, | |
109 | [MAX8997_LDO13] = &ldo_voltage_map_desc, | |
110 | [MAX8997_LDO14] = &ldo_voltage_map_desc, | |
111 | [MAX8997_LDO15] = &ldo_voltage_map_desc, | |
112 | [MAX8997_LDO16] = &ldo_voltage_map_desc, | |
113 | [MAX8997_LDO17] = &ldo_voltage_map_desc, | |
114 | [MAX8997_LDO18] = &ldo_voltage_map_desc, | |
115 | [MAX8997_LDO21] = &ldo_voltage_map_desc, | |
116 | [MAX8997_BUCK1] = &buck1245_voltage_map_desc, | |
117 | [MAX8997_BUCK2] = &buck1245_voltage_map_desc, | |
118 | [MAX8997_BUCK3] = &buck37_voltage_map_desc, | |
119 | [MAX8997_BUCK4] = &buck1245_voltage_map_desc, | |
120 | [MAX8997_BUCK5] = &buck1245_voltage_map_desc, | |
121 | [MAX8997_BUCK6] = NULL, | |
122 | [MAX8997_BUCK7] = &buck37_voltage_map_desc, | |
123 | [MAX8997_EN32KHZ_AP] = NULL, | |
124 | [MAX8997_EN32KHZ_CP] = NULL, | |
125 | [MAX8997_ENVICHG] = NULL, | |
126 | [MAX8997_ESAFEOUT1] = NULL, | |
127 | [MAX8997_ESAFEOUT2] = NULL, | |
128 | [MAX8997_CHARGER_CV] = NULL, | |
129 | [MAX8997_CHARGER] = &charger_current_map_desc, | |
130 | [MAX8997_CHARGER_TOPOFF] = &topoff_current_map_desc, | |
131 | }; | |
132 | ||
bd6ca2cf MH |
133 | static int max8997_list_voltage_safeout(struct regulator_dev *rdev, |
134 | unsigned int selector) | |
135 | { | |
b3e1348e | 136 | int rid = rdev_get_id(rdev); |
bd6ca2cf MH |
137 | |
138 | if (rid == MAX8997_ESAFEOUT1 || rid == MAX8997_ESAFEOUT2) { | |
139 | switch (selector) { | |
140 | case 0: | |
141 | return 4850000; | |
142 | case 1: | |
143 | return 4900000; | |
144 | case 2: | |
145 | return 4950000; | |
146 | case 3: | |
147 | return 3300000; | |
148 | default: | |
149 | return -EINVAL; | |
150 | } | |
151 | } | |
152 | ||
153 | return -EINVAL; | |
154 | } | |
155 | ||
156 | static int max8997_list_voltage_charger_cv(struct regulator_dev *rdev, | |
157 | unsigned int selector) | |
158 | { | |
b3e1348e | 159 | int rid = rdev_get_id(rdev); |
bd6ca2cf MH |
160 | |
161 | if (rid != MAX8997_CHARGER_CV) | |
162 | goto err; | |
163 | ||
164 | switch (selector) { | |
165 | case 0x00: | |
166 | return 4200000; | |
167 | case 0x01 ... 0x0E: | |
168 | return 4000000 + 20000 * (selector - 0x01); | |
169 | case 0x0F: | |
170 | return 4350000; | |
171 | default: | |
172 | return -EINVAL; | |
173 | } | |
174 | err: | |
175 | return -EINVAL; | |
176 | } | |
177 | ||
178 | static int max8997_list_voltage(struct regulator_dev *rdev, | |
179 | unsigned int selector) | |
180 | { | |
181 | const struct voltage_map_desc *desc; | |
b3e1348e | 182 | int rid = rdev_get_id(rdev); |
bd6ca2cf MH |
183 | int val; |
184 | ||
185 | if (rid >= ARRAY_SIZE(reg_voltage_map) || | |
186 | rid < 0) | |
187 | return -EINVAL; | |
188 | ||
189 | desc = reg_voltage_map[rid]; | |
190 | if (desc == NULL) | |
191 | return -EINVAL; | |
192 | ||
193 | val = desc->min + desc->step * selector; | |
194 | if (val > desc->max) | |
195 | return -EINVAL; | |
196 | ||
bc3b7756 | 197 | return val; |
bd6ca2cf MH |
198 | } |
199 | ||
200 | static int max8997_get_enable_register(struct regulator_dev *rdev, | |
201 | int *reg, int *mask, int *pattern) | |
202 | { | |
b3e1348e | 203 | int rid = rdev_get_id(rdev); |
bd6ca2cf MH |
204 | |
205 | switch (rid) { | |
206 | case MAX8997_LDO1 ... MAX8997_LDO21: | |
207 | *reg = MAX8997_REG_LDO1CTRL + (rid - MAX8997_LDO1); | |
208 | *mask = 0xC0; | |
209 | *pattern = 0xC0; | |
210 | break; | |
211 | case MAX8997_BUCK1: | |
212 | *reg = MAX8997_REG_BUCK1CTRL; | |
213 | *mask = 0x01; | |
214 | *pattern = 0x01; | |
215 | break; | |
216 | case MAX8997_BUCK2: | |
217 | *reg = MAX8997_REG_BUCK2CTRL; | |
218 | *mask = 0x01; | |
219 | *pattern = 0x01; | |
220 | break; | |
221 | case MAX8997_BUCK3: | |
222 | *reg = MAX8997_REG_BUCK3CTRL; | |
223 | *mask = 0x01; | |
224 | *pattern = 0x01; | |
225 | break; | |
226 | case MAX8997_BUCK4: | |
227 | *reg = MAX8997_REG_BUCK4CTRL; | |
228 | *mask = 0x01; | |
229 | *pattern = 0x01; | |
230 | break; | |
231 | case MAX8997_BUCK5: | |
232 | *reg = MAX8997_REG_BUCK5CTRL; | |
233 | *mask = 0x01; | |
234 | *pattern = 0x01; | |
235 | break; | |
236 | case MAX8997_BUCK6: | |
237 | *reg = MAX8997_REG_BUCK6CTRL; | |
238 | *mask = 0x01; | |
239 | *pattern = 0x01; | |
240 | break; | |
241 | case MAX8997_BUCK7: | |
242 | *reg = MAX8997_REG_BUCK7CTRL; | |
243 | *mask = 0x01; | |
244 | *pattern = 0x01; | |
245 | break; | |
246 | case MAX8997_EN32KHZ_AP ... MAX8997_EN32KHZ_CP: | |
247 | *reg = MAX8997_REG_MAINCON1; | |
248 | *mask = 0x01 << (rid - MAX8997_EN32KHZ_AP); | |
249 | *pattern = 0x01 << (rid - MAX8997_EN32KHZ_AP); | |
250 | break; | |
251 | case MAX8997_ENVICHG: | |
252 | *reg = MAX8997_REG_MBCCTRL1; | |
253 | *mask = 0x80; | |
254 | *pattern = 0x80; | |
255 | break; | |
256 | case MAX8997_ESAFEOUT1 ... MAX8997_ESAFEOUT2: | |
257 | *reg = MAX8997_REG_SAFEOUTCTRL; | |
258 | *mask = 0x40 << (rid - MAX8997_ESAFEOUT1); | |
259 | *pattern = 0x40 << (rid - MAX8997_ESAFEOUT1); | |
260 | break; | |
261 | case MAX8997_CHARGER: | |
262 | *reg = MAX8997_REG_MBCCTRL2; | |
263 | *mask = 0x40; | |
264 | *pattern = 0x40; | |
265 | break; | |
266 | default: | |
267 | /* Not controllable or not exists */ | |
268 | return -EINVAL; | |
bd6ca2cf MH |
269 | } |
270 | ||
271 | return 0; | |
272 | } | |
273 | ||
274 | static int max8997_reg_is_enabled(struct regulator_dev *rdev) | |
275 | { | |
276 | struct max8997_data *max8997 = rdev_get_drvdata(rdev); | |
277 | struct i2c_client *i2c = max8997->iodev->i2c; | |
278 | int ret, reg, mask, pattern; | |
279 | u8 val; | |
280 | ||
281 | ret = max8997_get_enable_register(rdev, ®, &mask, &pattern); | |
c245c087 | 282 | if (ret) |
bd6ca2cf MH |
283 | return ret; |
284 | ||
285 | ret = max8997_read_reg(i2c, reg, &val); | |
286 | if (ret) | |
287 | return ret; | |
288 | ||
289 | return (val & mask) == pattern; | |
290 | } | |
291 | ||
292 | static int max8997_reg_enable(struct regulator_dev *rdev) | |
293 | { | |
294 | struct max8997_data *max8997 = rdev_get_drvdata(rdev); | |
295 | struct i2c_client *i2c = max8997->iodev->i2c; | |
296 | int ret, reg, mask, pattern; | |
297 | ||
298 | ret = max8997_get_enable_register(rdev, ®, &mask, &pattern); | |
299 | if (ret) | |
300 | return ret; | |
301 | ||
302 | return max8997_update_reg(i2c, reg, pattern, mask); | |
303 | } | |
304 | ||
305 | static int max8997_reg_disable(struct regulator_dev *rdev) | |
306 | { | |
307 | struct max8997_data *max8997 = rdev_get_drvdata(rdev); | |
308 | struct i2c_client *i2c = max8997->iodev->i2c; | |
309 | int ret, reg, mask, pattern; | |
310 | ||
311 | ret = max8997_get_enable_register(rdev, ®, &mask, &pattern); | |
312 | if (ret) | |
313 | return ret; | |
314 | ||
315 | return max8997_update_reg(i2c, reg, ~pattern, mask); | |
316 | } | |
317 | ||
318 | static int max8997_get_voltage_register(struct regulator_dev *rdev, | |
319 | int *_reg, int *_shift, int *_mask) | |
320 | { | |
6f43c380 | 321 | struct max8997_data *max8997 = rdev_get_drvdata(rdev); |
b3e1348e | 322 | int rid = rdev_get_id(rdev); |
bd6ca2cf MH |
323 | int reg, shift = 0, mask = 0x3f; |
324 | ||
325 | switch (rid) { | |
326 | case MAX8997_LDO1 ... MAX8997_LDO21: | |
327 | reg = MAX8997_REG_LDO1CTRL + (rid - MAX8997_LDO1); | |
328 | break; | |
329 | case MAX8997_BUCK1: | |
330 | reg = MAX8997_REG_BUCK1DVS1; | |
6f43c380 AL |
331 | if (max8997->buck1_gpiodvs) |
332 | reg += max8997->buck125_gpioindex; | |
bd6ca2cf MH |
333 | break; |
334 | case MAX8997_BUCK2: | |
335 | reg = MAX8997_REG_BUCK2DVS1; | |
6f43c380 AL |
336 | if (max8997->buck2_gpiodvs) |
337 | reg += max8997->buck125_gpioindex; | |
bd6ca2cf MH |
338 | break; |
339 | case MAX8997_BUCK3: | |
340 | reg = MAX8997_REG_BUCK3DVS; | |
341 | break; | |
342 | case MAX8997_BUCK4: | |
343 | reg = MAX8997_REG_BUCK4DVS; | |
344 | break; | |
345 | case MAX8997_BUCK5: | |
346 | reg = MAX8997_REG_BUCK5DVS1; | |
6f43c380 AL |
347 | if (max8997->buck5_gpiodvs) |
348 | reg += max8997->buck125_gpioindex; | |
bd6ca2cf MH |
349 | break; |
350 | case MAX8997_BUCK7: | |
351 | reg = MAX8997_REG_BUCK7DVS; | |
352 | break; | |
353 | case MAX8997_ESAFEOUT1 ... MAX8997_ESAFEOUT2: | |
354 | reg = MAX8997_REG_SAFEOUTCTRL; | |
355 | shift = (rid == MAX8997_ESAFEOUT2) ? 2 : 0; | |
356 | mask = 0x3; | |
357 | break; | |
358 | case MAX8997_CHARGER_CV: | |
359 | reg = MAX8997_REG_MBCCTRL3; | |
360 | shift = 0; | |
361 | mask = 0xf; | |
362 | break; | |
363 | case MAX8997_CHARGER: | |
364 | reg = MAX8997_REG_MBCCTRL4; | |
365 | shift = 0; | |
366 | mask = 0xf; | |
367 | break; | |
368 | case MAX8997_CHARGER_TOPOFF: | |
369 | reg = MAX8997_REG_MBCCTRL5; | |
370 | shift = 0; | |
371 | mask = 0xf; | |
372 | break; | |
373 | default: | |
374 | return -EINVAL; | |
375 | } | |
376 | ||
377 | *_reg = reg; | |
378 | *_shift = shift; | |
379 | *_mask = mask; | |
380 | ||
381 | return 0; | |
382 | } | |
383 | ||
9e96b3a7 | 384 | static int max8997_get_voltage_sel(struct regulator_dev *rdev) |
bd6ca2cf MH |
385 | { |
386 | struct max8997_data *max8997 = rdev_get_drvdata(rdev); | |
bd6ca2cf MH |
387 | struct i2c_client *i2c = max8997->iodev->i2c; |
388 | int reg, shift, mask, ret; | |
bd6ca2cf MH |
389 | u8 val; |
390 | ||
391 | ret = max8997_get_voltage_register(rdev, ®, &shift, &mask); | |
392 | if (ret) | |
393 | return ret; | |
394 | ||
bd6ca2cf MH |
395 | ret = max8997_read_reg(i2c, reg, &val); |
396 | if (ret) | |
397 | return ret; | |
398 | ||
399 | val >>= shift; | |
400 | val &= mask; | |
401 | ||
9e96b3a7 | 402 | return val; |
bd6ca2cf MH |
403 | } |
404 | ||
405 | static inline int max8997_get_voltage_proper_val( | |
406 | const struct voltage_map_desc *desc, | |
407 | int min_vol, int max_vol) | |
408 | { | |
2358b776 | 409 | int i; |
bd6ca2cf MH |
410 | |
411 | if (desc == NULL) | |
412 | return -EINVAL; | |
413 | ||
414 | if (max_vol < desc->min || min_vol > desc->max) | |
415 | return -EINVAL; | |
416 | ||
2358b776 AL |
417 | if (min_vol < desc->min) |
418 | min_vol = desc->min; | |
bd6ca2cf | 419 | |
2358b776 | 420 | i = DIV_ROUND_UP(min_vol - desc->min, desc->step); |
bd6ca2cf | 421 | |
bd6ca2cf | 422 | if (desc->min + desc->step * i > max_vol) |
bd6ca2cf MH |
423 | return -EINVAL; |
424 | ||
425 | return i; | |
426 | } | |
427 | ||
428 | static int max8997_set_voltage_charger_cv(struct regulator_dev *rdev, | |
429 | int min_uV, int max_uV, unsigned *selector) | |
430 | { | |
431 | struct max8997_data *max8997 = rdev_get_drvdata(rdev); | |
432 | struct i2c_client *i2c = max8997->iodev->i2c; | |
b3e1348e | 433 | int rid = rdev_get_id(rdev); |
bd6ca2cf MH |
434 | int lb, ub; |
435 | int reg, shift = 0, mask, ret = 0; | |
436 | u8 val = 0x0; | |
437 | ||
438 | if (rid != MAX8997_CHARGER_CV) | |
439 | return -EINVAL; | |
440 | ||
441 | ret = max8997_get_voltage_register(rdev, ®, &shift, &mask); | |
442 | if (ret) | |
443 | return ret; | |
444 | ||
445 | if (max_uV < 4000000 || min_uV > 4350000) | |
446 | return -EINVAL; | |
447 | ||
448 | if (min_uV <= 4000000) { | |
449 | if (max_uV >= 4000000) | |
450 | return -EINVAL; | |
451 | else | |
452 | val = 0x1; | |
453 | } else if (min_uV <= 4200000 && max_uV >= 4200000) | |
454 | val = 0x0; | |
455 | else { | |
456 | lb = (min_uV - 4000001) / 20000 + 2; | |
457 | ub = (max_uV - 4000000) / 20000 + 1; | |
458 | ||
459 | if (lb > ub) | |
460 | return -EINVAL; | |
461 | ||
462 | if (lb < 0xf) | |
463 | val = lb; | |
464 | else { | |
465 | if (ub >= 0xf) | |
466 | val = 0xf; | |
467 | else | |
468 | return -EINVAL; | |
469 | } | |
470 | } | |
471 | ||
472 | *selector = val; | |
473 | ||
474 | ret = max8997_update_reg(i2c, reg, val << shift, mask); | |
475 | ||
476 | return ret; | |
477 | } | |
478 | ||
479 | /* | |
480 | * For LDO1 ~ LDO21, BUCK1~5, BUCK7, CHARGER, CHARGER_TOPOFF | |
481 | * BUCK1, 2, and 5 are available if they are not controlled by gpio | |
482 | */ | |
483 | static int max8997_set_voltage_ldobuck(struct regulator_dev *rdev, | |
484 | int min_uV, int max_uV, unsigned *selector) | |
485 | { | |
486 | struct max8997_data *max8997 = rdev_get_drvdata(rdev); | |
487 | struct i2c_client *i2c = max8997->iodev->i2c; | |
bd6ca2cf | 488 | const struct voltage_map_desc *desc; |
b3e1348e | 489 | int rid = rdev_get_id(rdev); |
62bc4d4a | 490 | int i, reg, shift, mask, ret; |
bd6ca2cf MH |
491 | |
492 | switch (rid) { | |
493 | case MAX8997_LDO1 ... MAX8997_LDO21: | |
494 | break; | |
495 | case MAX8997_BUCK1 ... MAX8997_BUCK5: | |
496 | break; | |
497 | case MAX8997_BUCK6: | |
498 | return -EINVAL; | |
499 | case MAX8997_BUCK7: | |
500 | break; | |
501 | case MAX8997_CHARGER: | |
502 | break; | |
503 | case MAX8997_CHARGER_TOPOFF: | |
504 | break; | |
505 | default: | |
506 | return -EINVAL; | |
507 | } | |
508 | ||
509 | desc = reg_voltage_map[rid]; | |
510 | ||
bc3b7756 | 511 | i = max8997_get_voltage_proper_val(desc, min_uV, max_uV); |
bd6ca2cf MH |
512 | if (i < 0) |
513 | return i; | |
514 | ||
515 | ret = max8997_get_voltage_register(rdev, ®, &shift, &mask); | |
516 | if (ret) | |
517 | return ret; | |
518 | ||
bd6ca2cf MH |
519 | ret = max8997_update_reg(i2c, reg, i << shift, mask << shift); |
520 | *selector = i; | |
521 | ||
62bc4d4a AL |
522 | return ret; |
523 | } | |
524 | ||
525 | static int max8997_set_voltage_ldobuck_time_sel(struct regulator_dev *rdev, | |
526 | unsigned int old_selector, | |
527 | unsigned int new_selector) | |
528 | { | |
529 | struct max8997_data *max8997 = rdev_get_drvdata(rdev); | |
530 | int rid = rdev_get_id(rdev); | |
531 | const struct voltage_map_desc *desc = reg_voltage_map[rid]; | |
532 | ||
533 | /* Delay is required only if the voltage is increasing */ | |
534 | if (old_selector >= new_selector) | |
535 | return 0; | |
536 | ||
537 | /* No need to delay if gpio_dvs_mode */ | |
538 | switch (rid) { | |
539 | case MAX8997_BUCK1: | |
540 | if (max8997->buck1_gpiodvs) | |
541 | return 0; | |
542 | break; | |
543 | case MAX8997_BUCK2: | |
544 | if (max8997->buck2_gpiodvs) | |
545 | return 0; | |
546 | break; | |
547 | case MAX8997_BUCK5: | |
548 | if (max8997->buck5_gpiodvs) | |
549 | return 0; | |
550 | break; | |
bd6ca2cf MH |
551 | } |
552 | ||
62bc4d4a AL |
553 | switch (rid) { |
554 | case MAX8997_BUCK1: | |
555 | case MAX8997_BUCK2: | |
556 | case MAX8997_BUCK4: | |
557 | case MAX8997_BUCK5: | |
558 | return DIV_ROUND_UP(desc->step * (new_selector - old_selector), | |
bc3b7756 | 559 | max8997->ramp_delay * 1000); |
bd6ca2cf MH |
560 | } |
561 | ||
62bc4d4a | 562 | return 0; |
bd6ca2cf MH |
563 | } |
564 | ||
565 | /* | |
566 | * Assess the damage on the voltage setting of BUCK1,2,5 by the change. | |
567 | * | |
568 | * When GPIO-DVS mode is used for multiple bucks, changing the voltage value | |
569 | * of one of the bucks may affect that of another buck, which is the side | |
570 | * effect of the change (set_voltage). This function examines the GPIO-DVS | |
571 | * configurations and checks whether such side-effect exists. | |
572 | */ | |
573 | static int max8997_assess_side_effect(struct regulator_dev *rdev, | |
574 | u8 new_val, int *best) | |
575 | { | |
576 | struct max8997_data *max8997 = rdev_get_drvdata(rdev); | |
b3e1348e | 577 | int rid = rdev_get_id(rdev); |
bd6ca2cf MH |
578 | u8 *buckx_val[3]; |
579 | bool buckx_gpiodvs[3]; | |
580 | int side_effect[8]; | |
581 | int min_side_effect = INT_MAX; | |
582 | int i; | |
583 | ||
584 | *best = -1; | |
585 | ||
586 | switch (rid) { | |
587 | case MAX8997_BUCK1: | |
588 | rid = 0; | |
589 | break; | |
590 | case MAX8997_BUCK2: | |
591 | rid = 1; | |
592 | break; | |
593 | case MAX8997_BUCK5: | |
594 | rid = 2; | |
595 | break; | |
596 | default: | |
597 | return -EINVAL; | |
598 | } | |
599 | ||
600 | buckx_val[0] = max8997->buck1_vol; | |
601 | buckx_val[1] = max8997->buck2_vol; | |
602 | buckx_val[2] = max8997->buck5_vol; | |
6e0414a5 MH |
603 | buckx_gpiodvs[0] = max8997->buck1_gpiodvs; |
604 | buckx_gpiodvs[1] = max8997->buck2_gpiodvs; | |
605 | buckx_gpiodvs[2] = max8997->buck5_gpiodvs; | |
bd6ca2cf MH |
606 | |
607 | for (i = 0; i < 8; i++) { | |
608 | int others; | |
609 | ||
610 | if (new_val != (buckx_val[rid])[i]) { | |
611 | side_effect[i] = -1; | |
612 | continue; | |
613 | } | |
614 | ||
615 | side_effect[i] = 0; | |
616 | for (others = 0; others < 3; others++) { | |
617 | int diff; | |
618 | ||
619 | if (others == rid) | |
620 | continue; | |
621 | if (buckx_gpiodvs[others] == false) | |
622 | continue; /* Not affected */ | |
623 | diff = (buckx_val[others])[i] - | |
624 | (buckx_val[others])[max8997->buck125_gpioindex]; | |
625 | if (diff > 0) | |
626 | side_effect[i] += diff; | |
627 | else if (diff < 0) | |
628 | side_effect[i] -= diff; | |
629 | } | |
630 | if (side_effect[i] == 0) { | |
631 | *best = i; | |
632 | return 0; /* NO SIDE EFFECT! Use This! */ | |
633 | } | |
634 | if (side_effect[i] < min_side_effect) { | |
635 | min_side_effect = side_effect[i]; | |
636 | *best = i; | |
637 | } | |
638 | } | |
639 | ||
640 | if (*best == -1) | |
641 | return -EINVAL; | |
642 | ||
643 | return side_effect[*best]; | |
644 | } | |
645 | ||
646 | /* | |
647 | * For Buck 1 ~ 5 and 7. If it is not controlled by GPIO, this calls | |
648 | * max8997_set_voltage_ldobuck to do the job. | |
649 | */ | |
650 | static int max8997_set_voltage_buck(struct regulator_dev *rdev, | |
651 | int min_uV, int max_uV, unsigned *selector) | |
652 | { | |
653 | struct max8997_data *max8997 = rdev_get_drvdata(rdev); | |
b3e1348e | 654 | int rid = rdev_get_id(rdev); |
bd6ca2cf MH |
655 | const struct voltage_map_desc *desc; |
656 | int new_val, new_idx, damage, tmp_val, tmp_idx, tmp_dmg; | |
657 | bool gpio_dvs_mode = false; | |
bd6ca2cf MH |
658 | |
659 | if (rid < MAX8997_BUCK1 || rid > MAX8997_BUCK7) | |
660 | return -EINVAL; | |
661 | ||
662 | switch (rid) { | |
663 | case MAX8997_BUCK1: | |
6e0414a5 | 664 | if (max8997->buck1_gpiodvs) |
bd6ca2cf MH |
665 | gpio_dvs_mode = true; |
666 | break; | |
667 | case MAX8997_BUCK2: | |
6e0414a5 | 668 | if (max8997->buck2_gpiodvs) |
bd6ca2cf MH |
669 | gpio_dvs_mode = true; |
670 | break; | |
671 | case MAX8997_BUCK5: | |
6e0414a5 | 672 | if (max8997->buck5_gpiodvs) |
bd6ca2cf MH |
673 | gpio_dvs_mode = true; |
674 | break; | |
675 | } | |
676 | ||
677 | if (!gpio_dvs_mode) | |
678 | return max8997_set_voltage_ldobuck(rdev, min_uV, max_uV, | |
679 | selector); | |
680 | ||
681 | desc = reg_voltage_map[rid]; | |
bc3b7756 | 682 | new_val = max8997_get_voltage_proper_val(desc, min_uV, max_uV); |
bd6ca2cf MH |
683 | if (new_val < 0) |
684 | return new_val; | |
685 | ||
686 | tmp_dmg = INT_MAX; | |
687 | tmp_idx = -1; | |
688 | tmp_val = -1; | |
689 | do { | |
690 | damage = max8997_assess_side_effect(rdev, new_val, &new_idx); | |
691 | if (damage == 0) | |
692 | goto out; | |
693 | ||
694 | if (tmp_dmg > damage) { | |
695 | tmp_idx = new_idx; | |
696 | tmp_val = new_val; | |
697 | tmp_dmg = damage; | |
698 | } | |
699 | ||
700 | new_val++; | |
f55205f4 | 701 | } while (desc->min + desc->step * new_val <= desc->max); |
bd6ca2cf MH |
702 | |
703 | new_idx = tmp_idx; | |
704 | new_val = tmp_val; | |
705 | ||
6e0414a5 | 706 | if (max8997->ignore_gpiodvs_side_effect == false) |
bd6ca2cf MH |
707 | return -EINVAL; |
708 | ||
709 | dev_warn(&rdev->dev, "MAX8997 GPIO-DVS Side Effect Warning: GPIO SET:" | |
710 | " %d -> %d\n", max8997->buck125_gpioindex, tmp_idx); | |
711 | ||
712 | out: | |
713 | if (new_idx < 0 || new_val < 0) | |
714 | return -EINVAL; | |
715 | ||
716 | max8997->buck125_gpioindex = new_idx; | |
717 | max8997_set_gpio(max8997); | |
718 | *selector = new_val; | |
719 | ||
720 | return 0; | |
721 | } | |
722 | ||
723 | static const int safeoutvolt[] = { | |
724 | 3300000, | |
725 | 4850000, | |
726 | 4900000, | |
727 | 4950000, | |
728 | }; | |
729 | ||
730 | /* For SAFEOUT1 and SAFEOUT2 */ | |
731 | static int max8997_set_voltage_safeout(struct regulator_dev *rdev, | |
732 | int min_uV, int max_uV, unsigned *selector) | |
733 | { | |
734 | struct max8997_data *max8997 = rdev_get_drvdata(rdev); | |
735 | struct i2c_client *i2c = max8997->iodev->i2c; | |
b3e1348e | 736 | int rid = rdev_get_id(rdev); |
bd6ca2cf MH |
737 | int reg, shift = 0, mask, ret; |
738 | int i = 0; | |
739 | u8 val; | |
740 | ||
741 | if (rid != MAX8997_ESAFEOUT1 && rid != MAX8997_ESAFEOUT2) | |
742 | return -EINVAL; | |
743 | ||
744 | for (i = 0; i < ARRAY_SIZE(safeoutvolt); i++) { | |
745 | if (min_uV <= safeoutvolt[i] && | |
746 | max_uV >= safeoutvolt[i]) | |
747 | break; | |
748 | } | |
749 | ||
750 | if (i >= ARRAY_SIZE(safeoutvolt)) | |
751 | return -EINVAL; | |
752 | ||
753 | if (i == 0) | |
754 | val = 0x3; | |
755 | else | |
756 | val = i - 1; | |
757 | ||
758 | ret = max8997_get_voltage_register(rdev, ®, &shift, &mask); | |
759 | if (ret) | |
760 | return ret; | |
761 | ||
762 | ret = max8997_update_reg(i2c, reg, val << shift, mask << shift); | |
763 | *selector = val; | |
764 | ||
765 | return ret; | |
766 | } | |
767 | ||
bd6ca2cf MH |
768 | static int max8997_reg_disable_suspend(struct regulator_dev *rdev) |
769 | { | |
770 | struct max8997_data *max8997 = rdev_get_drvdata(rdev); | |
771 | struct i2c_client *i2c = max8997->iodev->i2c; | |
772 | int ret, reg, mask, pattern; | |
b3e1348e | 773 | int rid = rdev_get_id(rdev); |
bd6ca2cf MH |
774 | |
775 | ret = max8997_get_enable_register(rdev, ®, &mask, &pattern); | |
776 | if (ret) | |
777 | return ret; | |
778 | ||
779 | max8997_read_reg(i2c, reg, &max8997->saved_states[rid]); | |
780 | ||
781 | if (rid == MAX8997_LDO1 || | |
782 | rid == MAX8997_LDO10 || | |
783 | rid == MAX8997_LDO21) { | |
784 | dev_dbg(&rdev->dev, "Conditional Power-Off for %s\n", | |
785 | rdev->desc->name); | |
786 | return max8997_update_reg(i2c, reg, 0x40, mask); | |
787 | } | |
788 | ||
789 | dev_dbg(&rdev->dev, "Full Power-Off for %s (%xh -> %xh)\n", | |
790 | rdev->desc->name, max8997->saved_states[rid] & mask, | |
791 | (~pattern) & mask); | |
792 | return max8997_update_reg(i2c, reg, ~pattern, mask); | |
793 | } | |
794 | ||
795 | static struct regulator_ops max8997_ldo_ops = { | |
796 | .list_voltage = max8997_list_voltage, | |
797 | .is_enabled = max8997_reg_is_enabled, | |
798 | .enable = max8997_reg_enable, | |
799 | .disable = max8997_reg_disable, | |
9e96b3a7 | 800 | .get_voltage_sel = max8997_get_voltage_sel, |
bd6ca2cf | 801 | .set_voltage = max8997_set_voltage_ldobuck, |
62bc4d4a | 802 | .set_voltage_time_sel = max8997_set_voltage_ldobuck_time_sel, |
bd6ca2cf MH |
803 | .set_suspend_disable = max8997_reg_disable_suspend, |
804 | }; | |
805 | ||
806 | static struct regulator_ops max8997_buck_ops = { | |
807 | .list_voltage = max8997_list_voltage, | |
808 | .is_enabled = max8997_reg_is_enabled, | |
809 | .enable = max8997_reg_enable, | |
810 | .disable = max8997_reg_disable, | |
9e96b3a7 | 811 | .get_voltage_sel = max8997_get_voltage_sel, |
bd6ca2cf | 812 | .set_voltage = max8997_set_voltage_buck, |
62bc4d4a | 813 | .set_voltage_time_sel = max8997_set_voltage_ldobuck_time_sel, |
bd6ca2cf MH |
814 | .set_suspend_disable = max8997_reg_disable_suspend, |
815 | }; | |
816 | ||
817 | static struct regulator_ops max8997_fixedvolt_ops = { | |
818 | .list_voltage = max8997_list_voltage, | |
819 | .is_enabled = max8997_reg_is_enabled, | |
820 | .enable = max8997_reg_enable, | |
821 | .disable = max8997_reg_disable, | |
bd6ca2cf MH |
822 | .set_suspend_disable = max8997_reg_disable_suspend, |
823 | }; | |
824 | ||
825 | static struct regulator_ops max8997_safeout_ops = { | |
826 | .list_voltage = max8997_list_voltage_safeout, | |
827 | .is_enabled = max8997_reg_is_enabled, | |
828 | .enable = max8997_reg_enable, | |
829 | .disable = max8997_reg_disable, | |
9e96b3a7 | 830 | .get_voltage_sel = max8997_get_voltage_sel, |
bd6ca2cf | 831 | .set_voltage = max8997_set_voltage_safeout, |
bd6ca2cf MH |
832 | .set_suspend_disable = max8997_reg_disable_suspend, |
833 | }; | |
834 | ||
835 | static struct regulator_ops max8997_fixedstate_ops = { | |
836 | .list_voltage = max8997_list_voltage_charger_cv, | |
9e96b3a7 | 837 | .get_voltage_sel = max8997_get_voltage_sel, |
bd6ca2cf MH |
838 | .set_voltage = max8997_set_voltage_charger_cv, |
839 | }; | |
840 | ||
9e96b3a7 AL |
841 | static int max8997_set_current_limit(struct regulator_dev *rdev, |
842 | int min_uA, int max_uA) | |
bd6ca2cf MH |
843 | { |
844 | unsigned dummy; | |
9e96b3a7 | 845 | int rid = rdev_get_id(rdev); |
bd6ca2cf | 846 | |
9e96b3a7 AL |
847 | if (rid != MAX8997_CHARGER && rid != MAX8997_CHARGER_TOPOFF) |
848 | return -EINVAL; | |
bd6ca2cf | 849 | |
9e96b3a7 AL |
850 | /* Reuse max8997_set_voltage_ldobuck to set current_limit. */ |
851 | return max8997_set_voltage_ldobuck(rdev, min_uA, max_uA, &dummy); | |
bd6ca2cf MH |
852 | } |
853 | ||
9e96b3a7 AL |
854 | static int max8997_get_current_limit(struct regulator_dev *rdev) |
855 | { | |
856 | int sel, rid = rdev_get_id(rdev); | |
857 | ||
858 | if (rid != MAX8997_CHARGER && rid != MAX8997_CHARGER_TOPOFF) | |
859 | return -EINVAL; | |
860 | ||
861 | sel = max8997_get_voltage_sel(rdev); | |
862 | if (sel < 0) | |
863 | return sel; | |
864 | ||
865 | /* Reuse max8997_list_voltage to get current_limit. */ | |
866 | return max8997_list_voltage(rdev, sel); | |
867 | } | |
bd6ca2cf MH |
868 | |
869 | static struct regulator_ops max8997_charger_ops = { | |
870 | .is_enabled = max8997_reg_is_enabled, | |
871 | .enable = max8997_reg_enable, | |
872 | .disable = max8997_reg_disable, | |
9e96b3a7 AL |
873 | .get_current_limit = max8997_get_current_limit, |
874 | .set_current_limit = max8997_set_current_limit, | |
bd6ca2cf MH |
875 | }; |
876 | ||
877 | static struct regulator_ops max8997_charger_fixedstate_ops = { | |
9e96b3a7 AL |
878 | .get_current_limit = max8997_get_current_limit, |
879 | .set_current_limit = max8997_set_current_limit, | |
bd6ca2cf MH |
880 | }; |
881 | ||
4533f80e AL |
882 | #define MAX8997_VOLTAGE_REGULATOR(_name, _ops) {\ |
883 | .name = #_name, \ | |
884 | .id = MAX8997_##_name, \ | |
885 | .ops = &_ops, \ | |
bd6ca2cf MH |
886 | .type = REGULATOR_VOLTAGE, \ |
887 | .owner = THIS_MODULE, \ | |
888 | } | |
4533f80e AL |
889 | |
890 | #define MAX8997_CURRENT_REGULATOR(_name, _ops) {\ | |
891 | .name = #_name, \ | |
892 | .id = MAX8997_##_name, \ | |
893 | .ops = &_ops, \ | |
894 | .type = REGULATOR_CURRENT, \ | |
bd6ca2cf MH |
895 | .owner = THIS_MODULE, \ |
896 | } | |
897 | ||
898 | static struct regulator_desc regulators[] = { | |
4533f80e AL |
899 | MAX8997_VOLTAGE_REGULATOR(LDO1, max8997_ldo_ops), |
900 | MAX8997_VOLTAGE_REGULATOR(LDO2, max8997_ldo_ops), | |
901 | MAX8997_VOLTAGE_REGULATOR(LDO3, max8997_ldo_ops), | |
902 | MAX8997_VOLTAGE_REGULATOR(LDO4, max8997_ldo_ops), | |
903 | MAX8997_VOLTAGE_REGULATOR(LDO5, max8997_ldo_ops), | |
904 | MAX8997_VOLTAGE_REGULATOR(LDO6, max8997_ldo_ops), | |
905 | MAX8997_VOLTAGE_REGULATOR(LDO7, max8997_ldo_ops), | |
906 | MAX8997_VOLTAGE_REGULATOR(LDO8, max8997_ldo_ops), | |
907 | MAX8997_VOLTAGE_REGULATOR(LDO9, max8997_ldo_ops), | |
908 | MAX8997_VOLTAGE_REGULATOR(LDO10, max8997_ldo_ops), | |
909 | MAX8997_VOLTAGE_REGULATOR(LDO11, max8997_ldo_ops), | |
910 | MAX8997_VOLTAGE_REGULATOR(LDO12, max8997_ldo_ops), | |
911 | MAX8997_VOLTAGE_REGULATOR(LDO13, max8997_ldo_ops), | |
912 | MAX8997_VOLTAGE_REGULATOR(LDO14, max8997_ldo_ops), | |
913 | MAX8997_VOLTAGE_REGULATOR(LDO15, max8997_ldo_ops), | |
914 | MAX8997_VOLTAGE_REGULATOR(LDO16, max8997_ldo_ops), | |
915 | MAX8997_VOLTAGE_REGULATOR(LDO17, max8997_ldo_ops), | |
916 | MAX8997_VOLTAGE_REGULATOR(LDO18, max8997_ldo_ops), | |
917 | MAX8997_VOLTAGE_REGULATOR(LDO21, max8997_ldo_ops), | |
918 | MAX8997_VOLTAGE_REGULATOR(BUCK1, max8997_buck_ops), | |
919 | MAX8997_VOLTAGE_REGULATOR(BUCK2, max8997_buck_ops), | |
920 | MAX8997_VOLTAGE_REGULATOR(BUCK3, max8997_buck_ops), | |
921 | MAX8997_VOLTAGE_REGULATOR(BUCK4, max8997_buck_ops), | |
922 | MAX8997_VOLTAGE_REGULATOR(BUCK5, max8997_buck_ops), | |
923 | MAX8997_VOLTAGE_REGULATOR(BUCK6, max8997_fixedvolt_ops), | |
924 | MAX8997_VOLTAGE_REGULATOR(BUCK7, max8997_buck_ops), | |
925 | MAX8997_VOLTAGE_REGULATOR(EN32KHZ_AP, max8997_fixedvolt_ops), | |
926 | MAX8997_VOLTAGE_REGULATOR(EN32KHZ_CP, max8997_fixedvolt_ops), | |
927 | MAX8997_VOLTAGE_REGULATOR(ENVICHG, max8997_fixedvolt_ops), | |
928 | MAX8997_VOLTAGE_REGULATOR(ESAFEOUT1, max8997_safeout_ops), | |
929 | MAX8997_VOLTAGE_REGULATOR(ESAFEOUT2, max8997_safeout_ops), | |
930 | MAX8997_VOLTAGE_REGULATOR(CHARGER_CV, max8997_fixedstate_ops), | |
931 | MAX8997_CURRENT_REGULATOR(CHARGER, max8997_charger_ops), | |
932 | MAX8997_CURRENT_REGULATOR(CHARGER_TOPOFF, | |
933 | max8997_charger_fixedstate_ops), | |
bd6ca2cf MH |
934 | }; |
935 | ||
77b71b37 TA |
936 | #ifdef CONFIG_OF |
937 | static int max8997_pmic_dt_parse_dvs_gpio(struct max8997_dev *iodev, | |
938 | struct max8997_platform_data *pdata, | |
939 | struct device_node *pmic_np) | |
940 | { | |
941 | int i, gpio; | |
942 | ||
943 | for (i = 0; i < 3; i++) { | |
944 | gpio = of_get_named_gpio(pmic_np, | |
945 | "max8997,pmic-buck125-dvs-gpios", i); | |
946 | if (!gpio_is_valid(gpio)) { | |
947 | dev_err(iodev->dev, "invalid gpio[%d]: %d\n", i, gpio); | |
948 | return -EINVAL; | |
949 | } | |
950 | pdata->buck125_gpios[i] = gpio; | |
951 | } | |
952 | return 0; | |
953 | } | |
954 | ||
955 | static int max8997_pmic_dt_parse_pdata(struct max8997_dev *iodev, | |
956 | struct max8997_platform_data *pdata) | |
957 | { | |
958 | struct device_node *pmic_np, *regulators_np, *reg_np; | |
959 | struct max8997_regulator_data *rdata; | |
960 | unsigned int i, dvs_voltage_nr = 1, ret; | |
961 | ||
962 | pmic_np = iodev->dev->of_node; | |
963 | if (!pmic_np) { | |
964 | dev_err(iodev->dev, "could not find pmic sub-node\n"); | |
965 | return -ENODEV; | |
966 | } | |
967 | ||
968 | regulators_np = of_find_node_by_name(pmic_np, "regulators"); | |
969 | if (!regulators_np) { | |
970 | dev_err(iodev->dev, "could not find regulators sub-node\n"); | |
971 | return -EINVAL; | |
972 | } | |
973 | ||
974 | /* count the number of regulators to be supported in pmic */ | |
975 | pdata->num_regulators = 0; | |
976 | for_each_child_of_node(regulators_np, reg_np) | |
977 | pdata->num_regulators++; | |
978 | ||
979 | rdata = devm_kzalloc(iodev->dev, sizeof(*rdata) * | |
980 | pdata->num_regulators, GFP_KERNEL); | |
981 | if (!rdata) { | |
982 | dev_err(iodev->dev, "could not allocate memory for " | |
983 | "regulator data\n"); | |
984 | return -ENOMEM; | |
985 | } | |
986 | ||
987 | pdata->regulators = rdata; | |
988 | for_each_child_of_node(regulators_np, reg_np) { | |
989 | for (i = 0; i < ARRAY_SIZE(regulators); i++) | |
990 | if (!of_node_cmp(reg_np->name, regulators[i].name)) | |
991 | break; | |
992 | ||
993 | if (i == ARRAY_SIZE(regulators)) { | |
994 | dev_warn(iodev->dev, "don't know how to configure " | |
995 | "regulator %s\n", reg_np->name); | |
996 | continue; | |
997 | } | |
998 | ||
999 | rdata->id = i; | |
1000 | rdata->initdata = of_get_regulator_init_data( | |
1001 | iodev->dev, reg_np); | |
1002 | rdata->reg_node = reg_np; | |
1003 | rdata++; | |
1004 | } | |
1005 | ||
1006 | if (of_get_property(pmic_np, "max8997,pmic-buck1-uses-gpio-dvs", NULL)) | |
1007 | pdata->buck1_gpiodvs = true; | |
1008 | ||
1009 | if (of_get_property(pmic_np, "max8997,pmic-buck2-uses-gpio-dvs", NULL)) | |
1010 | pdata->buck2_gpiodvs = true; | |
1011 | ||
1012 | if (of_get_property(pmic_np, "max8997,pmic-buck5-uses-gpio-dvs", NULL)) | |
1013 | pdata->buck5_gpiodvs = true; | |
1014 | ||
1015 | if (pdata->buck1_gpiodvs || pdata->buck2_gpiodvs || | |
1016 | pdata->buck5_gpiodvs) { | |
1017 | ret = max8997_pmic_dt_parse_dvs_gpio(iodev, pdata, pmic_np); | |
1018 | if (ret) | |
1019 | return -EINVAL; | |
1020 | ||
1021 | if (of_property_read_u32(pmic_np, | |
1022 | "max8997,pmic-buck125-default-dvs-idx", | |
1023 | &pdata->buck125_default_idx)) { | |
1024 | pdata->buck125_default_idx = 0; | |
1025 | } else { | |
1026 | if (pdata->buck125_default_idx >= 8) { | |
1027 | pdata->buck125_default_idx = 0; | |
1028 | dev_info(iodev->dev, "invalid value for " | |
1029 | "default dvs index, using 0 instead\n"); | |
1030 | } | |
1031 | } | |
1032 | ||
1033 | if (of_get_property(pmic_np, | |
1034 | "max8997,pmic-ignore-gpiodvs-side-effect", NULL)) | |
1035 | pdata->ignore_gpiodvs_side_effect = true; | |
1036 | ||
1037 | dvs_voltage_nr = 8; | |
1038 | } | |
1039 | ||
1040 | if (of_property_read_u32_array(pmic_np, | |
1041 | "max8997,pmic-buck1-dvs-voltage", | |
1042 | pdata->buck1_voltage, dvs_voltage_nr)) { | |
1043 | dev_err(iodev->dev, "buck1 voltages not specified\n"); | |
1044 | return -EINVAL; | |
1045 | } | |
1046 | ||
1047 | if (of_property_read_u32_array(pmic_np, | |
1048 | "max8997,pmic-buck2-dvs-voltage", | |
1049 | pdata->buck2_voltage, dvs_voltage_nr)) { | |
1050 | dev_err(iodev->dev, "buck2 voltages not specified\n"); | |
1051 | return -EINVAL; | |
1052 | } | |
1053 | ||
1054 | if (of_property_read_u32_array(pmic_np, | |
1055 | "max8997,pmic-buck5-dvs-voltage", | |
1056 | pdata->buck5_voltage, dvs_voltage_nr)) { | |
1057 | dev_err(iodev->dev, "buck5 voltages not specified\n"); | |
1058 | return -EINVAL; | |
1059 | } | |
1060 | ||
1061 | return 0; | |
1062 | } | |
1063 | #else | |
1064 | static int max8997_pmic_dt_parse_pdata(struct max8997_dev *iodev, | |
1065 | struct max8997_platform_data *pdata) | |
1066 | { | |
1067 | return 0; | |
1068 | } | |
1069 | #endif /* CONFIG_OF */ | |
1070 | ||
a5023574 | 1071 | static int max8997_pmic_probe(struct platform_device *pdev) |
bd6ca2cf MH |
1072 | { |
1073 | struct max8997_dev *iodev = dev_get_drvdata(pdev->dev.parent); | |
77b71b37 | 1074 | struct max8997_platform_data *pdata = iodev->pdata; |
c172708d | 1075 | struct regulator_config config = { }; |
bd6ca2cf MH |
1076 | struct regulator_dev **rdev; |
1077 | struct max8997_data *max8997; | |
1078 | struct i2c_client *i2c; | |
068a8c82 | 1079 | int i, ret, size, nr_dvs; |
bd6ca2cf MH |
1080 | u8 max_buck1 = 0, max_buck2 = 0, max_buck5 = 0; |
1081 | ||
77b71b37 | 1082 | if (IS_ERR_OR_NULL(pdata)) { |
bd6ca2cf MH |
1083 | dev_err(pdev->dev.parent, "No platform init data supplied.\n"); |
1084 | return -ENODEV; | |
1085 | } | |
1086 | ||
77b71b37 TA |
1087 | if (iodev->dev->of_node) { |
1088 | ret = max8997_pmic_dt_parse_pdata(iodev, pdata); | |
1089 | if (ret) | |
1090 | return ret; | |
1091 | } | |
1092 | ||
8ae5767b AL |
1093 | max8997 = devm_kzalloc(&pdev->dev, sizeof(struct max8997_data), |
1094 | GFP_KERNEL); | |
bd6ca2cf MH |
1095 | if (!max8997) |
1096 | return -ENOMEM; | |
1097 | ||
1098 | size = sizeof(struct regulator_dev *) * pdata->num_regulators; | |
8ae5767b AL |
1099 | max8997->rdev = devm_kzalloc(&pdev->dev, size, GFP_KERNEL); |
1100 | if (!max8997->rdev) | |
bd6ca2cf | 1101 | return -ENOMEM; |
bd6ca2cf MH |
1102 | |
1103 | rdev = max8997->rdev; | |
1104 | max8997->dev = &pdev->dev; | |
1105 | max8997->iodev = iodev; | |
1106 | max8997->num_regulators = pdata->num_regulators; | |
1107 | platform_set_drvdata(pdev, max8997); | |
1108 | i2c = max8997->iodev->i2c; | |
1109 | ||
1110 | max8997->buck125_gpioindex = pdata->buck125_default_idx; | |
6e0414a5 MH |
1111 | max8997->buck1_gpiodvs = pdata->buck1_gpiodvs; |
1112 | max8997->buck2_gpiodvs = pdata->buck2_gpiodvs; | |
1113 | max8997->buck5_gpiodvs = pdata->buck5_gpiodvs; | |
1114 | memcpy(max8997->buck125_gpios, pdata->buck125_gpios, sizeof(int) * 3); | |
1115 | max8997->ignore_gpiodvs_side_effect = pdata->ignore_gpiodvs_side_effect; | |
bd6ca2cf | 1116 | |
068a8c82 TA |
1117 | nr_dvs = (pdata->buck1_gpiodvs || pdata->buck2_gpiodvs || |
1118 | pdata->buck5_gpiodvs) ? 8 : 1; | |
1119 | ||
1120 | for (i = 0; i < nr_dvs; i++) { | |
bd6ca2cf MH |
1121 | max8997->buck1_vol[i] = ret = |
1122 | max8997_get_voltage_proper_val( | |
1123 | &buck1245_voltage_map_desc, | |
bc3b7756 AL |
1124 | pdata->buck1_voltage[i], |
1125 | pdata->buck1_voltage[i] + | |
bd6ca2cf MH |
1126 | buck1245_voltage_map_desc.step); |
1127 | if (ret < 0) | |
8ae5767b | 1128 | goto err_out; |
bd6ca2cf MH |
1129 | |
1130 | max8997->buck2_vol[i] = ret = | |
1131 | max8997_get_voltage_proper_val( | |
1132 | &buck1245_voltage_map_desc, | |
bc3b7756 AL |
1133 | pdata->buck2_voltage[i], |
1134 | pdata->buck2_voltage[i] + | |
bd6ca2cf MH |
1135 | buck1245_voltage_map_desc.step); |
1136 | if (ret < 0) | |
8ae5767b | 1137 | goto err_out; |
bd6ca2cf MH |
1138 | |
1139 | max8997->buck5_vol[i] = ret = | |
1140 | max8997_get_voltage_proper_val( | |
1141 | &buck1245_voltage_map_desc, | |
bc3b7756 AL |
1142 | pdata->buck5_voltage[i], |
1143 | pdata->buck5_voltage[i] + | |
bd6ca2cf MH |
1144 | buck1245_voltage_map_desc.step); |
1145 | if (ret < 0) | |
8ae5767b | 1146 | goto err_out; |
bd6ca2cf MH |
1147 | |
1148 | if (max_buck1 < max8997->buck1_vol[i]) | |
1149 | max_buck1 = max8997->buck1_vol[i]; | |
1150 | if (max_buck2 < max8997->buck2_vol[i]) | |
1151 | max_buck2 = max8997->buck2_vol[i]; | |
1152 | if (max_buck5 < max8997->buck5_vol[i]) | |
1153 | max_buck5 = max8997->buck5_vol[i]; | |
1154 | } | |
1155 | ||
1156 | /* For the safety, set max voltage before setting up */ | |
1157 | for (i = 0; i < 8; i++) { | |
ecb9c4f5 | 1158 | max8997_update_reg(i2c, MAX8997_REG_BUCK1DVS1 + i, |
bd6ca2cf | 1159 | max_buck1, 0x3f); |
ecb9c4f5 | 1160 | max8997_update_reg(i2c, MAX8997_REG_BUCK2DVS1 + i, |
bd6ca2cf | 1161 | max_buck2, 0x3f); |
ecb9c4f5 | 1162 | max8997_update_reg(i2c, MAX8997_REG_BUCK5DVS1 + i, |
bd6ca2cf MH |
1163 | max_buck5, 0x3f); |
1164 | } | |
1165 | ||
11ec7bf0 | 1166 | /* Initialize all the DVS related BUCK registers */ |
068a8c82 | 1167 | for (i = 0; i < nr_dvs; i++) { |
11ec7bf0 TA |
1168 | max8997_update_reg(i2c, MAX8997_REG_BUCK1DVS1 + i, |
1169 | max8997->buck1_vol[i], | |
1170 | 0x3f); | |
1171 | max8997_update_reg(i2c, MAX8997_REG_BUCK2DVS1 + i, | |
1172 | max8997->buck2_vol[i], | |
1173 | 0x3f); | |
1174 | max8997_update_reg(i2c, MAX8997_REG_BUCK5DVS1 + i, | |
1175 | max8997->buck5_vol[i], | |
1176 | 0x3f); | |
1177 | } | |
1178 | ||
bd6ca2cf MH |
1179 | /* |
1180 | * If buck 1, 2, and 5 do not care DVS GPIO settings, ignore them. | |
1181 | * If at least one of them cares, set gpios. | |
1182 | */ | |
1183 | if (pdata->buck1_gpiodvs || pdata->buck2_gpiodvs || | |
1184 | pdata->buck5_gpiodvs) { | |
bd6ca2cf MH |
1185 | |
1186 | if (!gpio_is_valid(pdata->buck125_gpios[0]) || | |
1187 | !gpio_is_valid(pdata->buck125_gpios[1]) || | |
1188 | !gpio_is_valid(pdata->buck125_gpios[2])) { | |
1189 | dev_err(&pdev->dev, "GPIO NOT VALID\n"); | |
1190 | ret = -EINVAL; | |
8ae5767b | 1191 | goto err_out; |
bd6ca2cf MH |
1192 | } |
1193 | ||
8fa25eda AL |
1194 | ret = devm_gpio_request(&pdev->dev, pdata->buck125_gpios[0], |
1195 | "MAX8997 SET1"); | |
1196 | if (ret) | |
8ae5767b | 1197 | goto err_out; |
8fa25eda AL |
1198 | |
1199 | ret = devm_gpio_request(&pdev->dev, pdata->buck125_gpios[1], | |
1200 | "MAX8997 SET2"); | |
1201 | if (ret) | |
8ae5767b | 1202 | goto err_out; |
bd6ca2cf | 1203 | |
8fa25eda | 1204 | ret = devm_gpio_request(&pdev->dev, pdata->buck125_gpios[2], |
bd6ca2cf | 1205 | "MAX8997 SET3"); |
8fa25eda | 1206 | if (ret) |
8ae5767b | 1207 | goto err_out; |
bd6ca2cf MH |
1208 | |
1209 | gpio_direction_output(pdata->buck125_gpios[0], | |
1210 | (max8997->buck125_gpioindex >> 2) | |
1211 | & 0x1); /* SET1 */ | |
1212 | gpio_direction_output(pdata->buck125_gpios[1], | |
1213 | (max8997->buck125_gpioindex >> 1) | |
1214 | & 0x1); /* SET2 */ | |
1215 | gpio_direction_output(pdata->buck125_gpios[2], | |
1216 | (max8997->buck125_gpioindex >> 0) | |
1217 | & 0x1); /* SET3 */ | |
bd6ca2cf MH |
1218 | } |
1219 | ||
1220 | /* DVS-GPIO disabled */ | |
1221 | max8997_update_reg(i2c, MAX8997_REG_BUCK1CTRL, (pdata->buck1_gpiodvs) ? | |
1222 | (1 << 1) : (0 << 1), 1 << 1); | |
1223 | max8997_update_reg(i2c, MAX8997_REG_BUCK2CTRL, (pdata->buck2_gpiodvs) ? | |
1224 | (1 << 1) : (0 << 1), 1 << 1); | |
1225 | max8997_update_reg(i2c, MAX8997_REG_BUCK5CTRL, (pdata->buck5_gpiodvs) ? | |
1226 | (1 << 1) : (0 << 1), 1 << 1); | |
1227 | ||
dbb48e7c TB |
1228 | /* Misc Settings */ |
1229 | max8997->ramp_delay = 10; /* set 10mV/us, which is the default */ | |
1230 | max8997_write_reg(i2c, MAX8997_REG_BUCKRAMP, (0xf << 4) | 0x9); | |
1231 | ||
bd6ca2cf MH |
1232 | for (i = 0; i < pdata->num_regulators; i++) { |
1233 | const struct voltage_map_desc *desc; | |
1234 | int id = pdata->regulators[i].id; | |
1235 | ||
1236 | desc = reg_voltage_map[id]; | |
1237 | if (desc) | |
1238 | regulators[id].n_voltages = | |
1239 | (desc->max - desc->min) / desc->step + 1; | |
1240 | else if (id == MAX8997_ESAFEOUT1 || id == MAX8997_ESAFEOUT2) | |
1241 | regulators[id].n_voltages = 4; | |
1242 | else if (id == MAX8997_CHARGER_CV) | |
1243 | regulators[id].n_voltages = 16; | |
1244 | ||
c172708d MB |
1245 | config.dev = max8997->dev; |
1246 | config.init_data = pdata->regulators[i].initdata; | |
1247 | config.driver_data = max8997; | |
77b71b37 | 1248 | config.of_node = pdata->regulators[i].reg_node; |
c172708d MB |
1249 | |
1250 | rdev[i] = regulator_register(®ulators[id], &config); | |
bd6ca2cf MH |
1251 | if (IS_ERR(rdev[i])) { |
1252 | ret = PTR_ERR(rdev[i]); | |
1253 | dev_err(max8997->dev, "regulator init failed for %d\n", | |
1254 | id); | |
1255 | rdev[i] = NULL; | |
1256 | goto err; | |
1257 | } | |
1258 | } | |
1259 | ||
bd6ca2cf MH |
1260 | return 0; |
1261 | err: | |
8ae5767b AL |
1262 | while (--i >= 0) |
1263 | regulator_unregister(rdev[i]); | |
1264 | err_out: | |
bd6ca2cf MH |
1265 | return ret; |
1266 | } | |
1267 | ||
8dc995f5 | 1268 | static int max8997_pmic_remove(struct platform_device *pdev) |
bd6ca2cf MH |
1269 | { |
1270 | struct max8997_data *max8997 = platform_get_drvdata(pdev); | |
1271 | struct regulator_dev **rdev = max8997->rdev; | |
1272 | int i; | |
1273 | ||
1274 | for (i = 0; i < max8997->num_regulators; i++) | |
8ae5767b | 1275 | regulator_unregister(rdev[i]); |
bd6ca2cf MH |
1276 | return 0; |
1277 | } | |
1278 | ||
1279 | static const struct platform_device_id max8997_pmic_id[] = { | |
1280 | { "max8997-pmic", 0}, | |
1281 | { }, | |
1282 | }; | |
a51b907b | 1283 | MODULE_DEVICE_TABLE(platform, max8997_pmic_id); |
bd6ca2cf MH |
1284 | |
1285 | static struct platform_driver max8997_pmic_driver = { | |
1286 | .driver = { | |
1287 | .name = "max8997-pmic", | |
1288 | .owner = THIS_MODULE, | |
1289 | }, | |
1290 | .probe = max8997_pmic_probe, | |
5eb9f2b9 | 1291 | .remove = max8997_pmic_remove, |
bd6ca2cf MH |
1292 | .id_table = max8997_pmic_id, |
1293 | }; | |
1294 | ||
1295 | static int __init max8997_pmic_init(void) | |
1296 | { | |
1297 | return platform_driver_register(&max8997_pmic_driver); | |
1298 | } | |
1299 | subsys_initcall(max8997_pmic_init); | |
1300 | ||
1301 | static void __exit max8997_pmic_cleanup(void) | |
1302 | { | |
1303 | platform_driver_unregister(&max8997_pmic_driver); | |
1304 | } | |
1305 | module_exit(max8997_pmic_cleanup); | |
1306 | ||
1307 | MODULE_DESCRIPTION("MAXIM 8997/8966 Regulator Driver"); | |
1308 | MODULE_AUTHOR("MyungJoo Ham <myungjoo.ham@samsung.com>"); | |
1309 | MODULE_LICENSE("GPL"); |