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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 | ||
b79ca051 AL |
57 | static const unsigned int safeoutvolt[] = { |
58 | 4850000, | |
59 | 4900000, | |
60 | 4950000, | |
61 | 3300000, | |
62 | }; | |
63 | ||
bd6ca2cf MH |
64 | static inline void max8997_set_gpio(struct max8997_data *max8997) |
65 | { | |
bd6ca2cf MH |
66 | int set3 = (max8997->buck125_gpioindex) & 0x1; |
67 | int set2 = ((max8997->buck125_gpioindex) >> 1) & 0x1; | |
68 | int set1 = ((max8997->buck125_gpioindex) >> 2) & 0x1; | |
69 | ||
6e0414a5 MH |
70 | gpio_set_value(max8997->buck125_gpios[0], set1); |
71 | gpio_set_value(max8997->buck125_gpios[1], set2); | |
72 | gpio_set_value(max8997->buck125_gpios[2], set3); | |
bd6ca2cf MH |
73 | } |
74 | ||
75 | struct voltage_map_desc { | |
76 | int min; | |
77 | int max; | |
78 | int step; | |
bd6ca2cf MH |
79 | }; |
80 | ||
bc3b7756 | 81 | /* Voltage maps in uV */ |
bd6ca2cf | 82 | static const struct voltage_map_desc ldo_voltage_map_desc = { |
bc3b7756 | 83 | .min = 800000, .max = 3950000, .step = 50000, |
bd6ca2cf MH |
84 | }; /* LDO1 ~ 18, 21 all */ |
85 | ||
86 | static const struct voltage_map_desc buck1245_voltage_map_desc = { | |
bc3b7756 | 87 | .min = 650000, .max = 2225000, .step = 25000, |
bd6ca2cf MH |
88 | }; /* Buck1, 2, 4, 5 */ |
89 | ||
90 | static const struct voltage_map_desc buck37_voltage_map_desc = { | |
bc3b7756 | 91 | .min = 750000, .max = 3900000, .step = 50000, |
bd6ca2cf MH |
92 | }; /* Buck3, 7 */ |
93 | ||
bc3b7756 | 94 | /* current map in uA */ |
bd6ca2cf | 95 | static const struct voltage_map_desc charger_current_map_desc = { |
bc3b7756 | 96 | .min = 200000, .max = 950000, .step = 50000, |
bd6ca2cf MH |
97 | }; |
98 | ||
99 | static const struct voltage_map_desc topoff_current_map_desc = { | |
bc3b7756 | 100 | .min = 50000, .max = 200000, .step = 10000, |
bd6ca2cf MH |
101 | }; |
102 | ||
103 | static const struct voltage_map_desc *reg_voltage_map[] = { | |
104 | [MAX8997_LDO1] = &ldo_voltage_map_desc, | |
105 | [MAX8997_LDO2] = &ldo_voltage_map_desc, | |
106 | [MAX8997_LDO3] = &ldo_voltage_map_desc, | |
107 | [MAX8997_LDO4] = &ldo_voltage_map_desc, | |
108 | [MAX8997_LDO5] = &ldo_voltage_map_desc, | |
109 | [MAX8997_LDO6] = &ldo_voltage_map_desc, | |
110 | [MAX8997_LDO7] = &ldo_voltage_map_desc, | |
111 | [MAX8997_LDO8] = &ldo_voltage_map_desc, | |
112 | [MAX8997_LDO9] = &ldo_voltage_map_desc, | |
113 | [MAX8997_LDO10] = &ldo_voltage_map_desc, | |
114 | [MAX8997_LDO11] = &ldo_voltage_map_desc, | |
115 | [MAX8997_LDO12] = &ldo_voltage_map_desc, | |
116 | [MAX8997_LDO13] = &ldo_voltage_map_desc, | |
117 | [MAX8997_LDO14] = &ldo_voltage_map_desc, | |
118 | [MAX8997_LDO15] = &ldo_voltage_map_desc, | |
119 | [MAX8997_LDO16] = &ldo_voltage_map_desc, | |
120 | [MAX8997_LDO17] = &ldo_voltage_map_desc, | |
121 | [MAX8997_LDO18] = &ldo_voltage_map_desc, | |
122 | [MAX8997_LDO21] = &ldo_voltage_map_desc, | |
123 | [MAX8997_BUCK1] = &buck1245_voltage_map_desc, | |
124 | [MAX8997_BUCK2] = &buck1245_voltage_map_desc, | |
125 | [MAX8997_BUCK3] = &buck37_voltage_map_desc, | |
126 | [MAX8997_BUCK4] = &buck1245_voltage_map_desc, | |
127 | [MAX8997_BUCK5] = &buck1245_voltage_map_desc, | |
128 | [MAX8997_BUCK6] = NULL, | |
129 | [MAX8997_BUCK7] = &buck37_voltage_map_desc, | |
130 | [MAX8997_EN32KHZ_AP] = NULL, | |
131 | [MAX8997_EN32KHZ_CP] = NULL, | |
132 | [MAX8997_ENVICHG] = NULL, | |
133 | [MAX8997_ESAFEOUT1] = NULL, | |
134 | [MAX8997_ESAFEOUT2] = NULL, | |
135 | [MAX8997_CHARGER_CV] = NULL, | |
136 | [MAX8997_CHARGER] = &charger_current_map_desc, | |
137 | [MAX8997_CHARGER_TOPOFF] = &topoff_current_map_desc, | |
138 | }; | |
139 | ||
bd6ca2cf MH |
140 | static int max8997_list_voltage_charger_cv(struct regulator_dev *rdev, |
141 | unsigned int selector) | |
142 | { | |
b3e1348e | 143 | int rid = rdev_get_id(rdev); |
bd6ca2cf MH |
144 | |
145 | if (rid != MAX8997_CHARGER_CV) | |
146 | goto err; | |
147 | ||
148 | switch (selector) { | |
149 | case 0x00: | |
150 | return 4200000; | |
151 | case 0x01 ... 0x0E: | |
152 | return 4000000 + 20000 * (selector - 0x01); | |
153 | case 0x0F: | |
154 | return 4350000; | |
155 | default: | |
156 | return -EINVAL; | |
157 | } | |
158 | err: | |
159 | return -EINVAL; | |
160 | } | |
161 | ||
162 | static int max8997_list_voltage(struct regulator_dev *rdev, | |
163 | unsigned int selector) | |
164 | { | |
165 | const struct voltage_map_desc *desc; | |
b3e1348e | 166 | int rid = rdev_get_id(rdev); |
bd6ca2cf MH |
167 | int val; |
168 | ||
169 | if (rid >= ARRAY_SIZE(reg_voltage_map) || | |
170 | rid < 0) | |
171 | return -EINVAL; | |
172 | ||
173 | desc = reg_voltage_map[rid]; | |
174 | if (desc == NULL) | |
175 | return -EINVAL; | |
176 | ||
177 | val = desc->min + desc->step * selector; | |
178 | if (val > desc->max) | |
179 | return -EINVAL; | |
180 | ||
bc3b7756 | 181 | return val; |
bd6ca2cf MH |
182 | } |
183 | ||
184 | static int max8997_get_enable_register(struct regulator_dev *rdev, | |
185 | int *reg, int *mask, int *pattern) | |
186 | { | |
b3e1348e | 187 | int rid = rdev_get_id(rdev); |
bd6ca2cf MH |
188 | |
189 | switch (rid) { | |
190 | case MAX8997_LDO1 ... MAX8997_LDO21: | |
191 | *reg = MAX8997_REG_LDO1CTRL + (rid - MAX8997_LDO1); | |
192 | *mask = 0xC0; | |
193 | *pattern = 0xC0; | |
194 | break; | |
195 | case MAX8997_BUCK1: | |
196 | *reg = MAX8997_REG_BUCK1CTRL; | |
197 | *mask = 0x01; | |
198 | *pattern = 0x01; | |
199 | break; | |
200 | case MAX8997_BUCK2: | |
201 | *reg = MAX8997_REG_BUCK2CTRL; | |
202 | *mask = 0x01; | |
203 | *pattern = 0x01; | |
204 | break; | |
205 | case MAX8997_BUCK3: | |
206 | *reg = MAX8997_REG_BUCK3CTRL; | |
207 | *mask = 0x01; | |
208 | *pattern = 0x01; | |
209 | break; | |
210 | case MAX8997_BUCK4: | |
211 | *reg = MAX8997_REG_BUCK4CTRL; | |
212 | *mask = 0x01; | |
213 | *pattern = 0x01; | |
214 | break; | |
215 | case MAX8997_BUCK5: | |
216 | *reg = MAX8997_REG_BUCK5CTRL; | |
217 | *mask = 0x01; | |
218 | *pattern = 0x01; | |
219 | break; | |
220 | case MAX8997_BUCK6: | |
221 | *reg = MAX8997_REG_BUCK6CTRL; | |
222 | *mask = 0x01; | |
223 | *pattern = 0x01; | |
224 | break; | |
225 | case MAX8997_BUCK7: | |
226 | *reg = MAX8997_REG_BUCK7CTRL; | |
227 | *mask = 0x01; | |
228 | *pattern = 0x01; | |
229 | break; | |
230 | case MAX8997_EN32KHZ_AP ... MAX8997_EN32KHZ_CP: | |
231 | *reg = MAX8997_REG_MAINCON1; | |
232 | *mask = 0x01 << (rid - MAX8997_EN32KHZ_AP); | |
233 | *pattern = 0x01 << (rid - MAX8997_EN32KHZ_AP); | |
234 | break; | |
235 | case MAX8997_ENVICHG: | |
236 | *reg = MAX8997_REG_MBCCTRL1; | |
237 | *mask = 0x80; | |
238 | *pattern = 0x80; | |
239 | break; | |
240 | case MAX8997_ESAFEOUT1 ... MAX8997_ESAFEOUT2: | |
241 | *reg = MAX8997_REG_SAFEOUTCTRL; | |
242 | *mask = 0x40 << (rid - MAX8997_ESAFEOUT1); | |
243 | *pattern = 0x40 << (rid - MAX8997_ESAFEOUT1); | |
244 | break; | |
245 | case MAX8997_CHARGER: | |
246 | *reg = MAX8997_REG_MBCCTRL2; | |
247 | *mask = 0x40; | |
248 | *pattern = 0x40; | |
249 | break; | |
250 | default: | |
251 | /* Not controllable or not exists */ | |
252 | return -EINVAL; | |
bd6ca2cf MH |
253 | } |
254 | ||
255 | return 0; | |
256 | } | |
257 | ||
258 | static int max8997_reg_is_enabled(struct regulator_dev *rdev) | |
259 | { | |
260 | struct max8997_data *max8997 = rdev_get_drvdata(rdev); | |
261 | struct i2c_client *i2c = max8997->iodev->i2c; | |
262 | int ret, reg, mask, pattern; | |
263 | u8 val; | |
264 | ||
265 | ret = max8997_get_enable_register(rdev, ®, &mask, &pattern); | |
c245c087 | 266 | if (ret) |
bd6ca2cf MH |
267 | return ret; |
268 | ||
269 | ret = max8997_read_reg(i2c, reg, &val); | |
270 | if (ret) | |
271 | return ret; | |
272 | ||
273 | return (val & mask) == pattern; | |
274 | } | |
275 | ||
276 | static int max8997_reg_enable(struct regulator_dev *rdev) | |
277 | { | |
278 | struct max8997_data *max8997 = rdev_get_drvdata(rdev); | |
279 | struct i2c_client *i2c = max8997->iodev->i2c; | |
280 | int ret, reg, mask, pattern; | |
281 | ||
282 | ret = max8997_get_enable_register(rdev, ®, &mask, &pattern); | |
283 | if (ret) | |
284 | return ret; | |
285 | ||
286 | return max8997_update_reg(i2c, reg, pattern, mask); | |
287 | } | |
288 | ||
289 | static int max8997_reg_disable(struct regulator_dev *rdev) | |
290 | { | |
291 | struct max8997_data *max8997 = rdev_get_drvdata(rdev); | |
292 | struct i2c_client *i2c = max8997->iodev->i2c; | |
293 | int ret, reg, mask, pattern; | |
294 | ||
295 | ret = max8997_get_enable_register(rdev, ®, &mask, &pattern); | |
296 | if (ret) | |
297 | return ret; | |
298 | ||
299 | return max8997_update_reg(i2c, reg, ~pattern, mask); | |
300 | } | |
301 | ||
302 | static int max8997_get_voltage_register(struct regulator_dev *rdev, | |
303 | int *_reg, int *_shift, int *_mask) | |
304 | { | |
6f43c380 | 305 | struct max8997_data *max8997 = rdev_get_drvdata(rdev); |
b3e1348e | 306 | int rid = rdev_get_id(rdev); |
bd6ca2cf MH |
307 | int reg, shift = 0, mask = 0x3f; |
308 | ||
309 | switch (rid) { | |
310 | case MAX8997_LDO1 ... MAX8997_LDO21: | |
311 | reg = MAX8997_REG_LDO1CTRL + (rid - MAX8997_LDO1); | |
312 | break; | |
313 | case MAX8997_BUCK1: | |
314 | reg = MAX8997_REG_BUCK1DVS1; | |
6f43c380 AL |
315 | if (max8997->buck1_gpiodvs) |
316 | reg += max8997->buck125_gpioindex; | |
bd6ca2cf MH |
317 | break; |
318 | case MAX8997_BUCK2: | |
319 | reg = MAX8997_REG_BUCK2DVS1; | |
6f43c380 AL |
320 | if (max8997->buck2_gpiodvs) |
321 | reg += max8997->buck125_gpioindex; | |
bd6ca2cf MH |
322 | break; |
323 | case MAX8997_BUCK3: | |
324 | reg = MAX8997_REG_BUCK3DVS; | |
325 | break; | |
326 | case MAX8997_BUCK4: | |
327 | reg = MAX8997_REG_BUCK4DVS; | |
328 | break; | |
329 | case MAX8997_BUCK5: | |
330 | reg = MAX8997_REG_BUCK5DVS1; | |
6f43c380 AL |
331 | if (max8997->buck5_gpiodvs) |
332 | reg += max8997->buck125_gpioindex; | |
bd6ca2cf MH |
333 | break; |
334 | case MAX8997_BUCK7: | |
335 | reg = MAX8997_REG_BUCK7DVS; | |
336 | break; | |
337 | case MAX8997_ESAFEOUT1 ... MAX8997_ESAFEOUT2: | |
338 | reg = MAX8997_REG_SAFEOUTCTRL; | |
339 | shift = (rid == MAX8997_ESAFEOUT2) ? 2 : 0; | |
340 | mask = 0x3; | |
341 | break; | |
342 | case MAX8997_CHARGER_CV: | |
343 | reg = MAX8997_REG_MBCCTRL3; | |
344 | shift = 0; | |
345 | mask = 0xf; | |
346 | break; | |
347 | case MAX8997_CHARGER: | |
348 | reg = MAX8997_REG_MBCCTRL4; | |
349 | shift = 0; | |
350 | mask = 0xf; | |
351 | break; | |
352 | case MAX8997_CHARGER_TOPOFF: | |
353 | reg = MAX8997_REG_MBCCTRL5; | |
354 | shift = 0; | |
355 | mask = 0xf; | |
356 | break; | |
357 | default: | |
358 | return -EINVAL; | |
359 | } | |
360 | ||
361 | *_reg = reg; | |
362 | *_shift = shift; | |
363 | *_mask = mask; | |
364 | ||
365 | return 0; | |
366 | } | |
367 | ||
9e96b3a7 | 368 | static int max8997_get_voltage_sel(struct regulator_dev *rdev) |
bd6ca2cf MH |
369 | { |
370 | struct max8997_data *max8997 = rdev_get_drvdata(rdev); | |
bd6ca2cf MH |
371 | struct i2c_client *i2c = max8997->iodev->i2c; |
372 | int reg, shift, mask, ret; | |
bd6ca2cf MH |
373 | u8 val; |
374 | ||
375 | ret = max8997_get_voltage_register(rdev, ®, &shift, &mask); | |
376 | if (ret) | |
377 | return ret; | |
378 | ||
bd6ca2cf MH |
379 | ret = max8997_read_reg(i2c, reg, &val); |
380 | if (ret) | |
381 | return ret; | |
382 | ||
383 | val >>= shift; | |
384 | val &= mask; | |
385 | ||
9e96b3a7 | 386 | return val; |
bd6ca2cf MH |
387 | } |
388 | ||
389 | static inline int max8997_get_voltage_proper_val( | |
390 | const struct voltage_map_desc *desc, | |
391 | int min_vol, int max_vol) | |
392 | { | |
2358b776 | 393 | int i; |
bd6ca2cf MH |
394 | |
395 | if (desc == NULL) | |
396 | return -EINVAL; | |
397 | ||
398 | if (max_vol < desc->min || min_vol > desc->max) | |
399 | return -EINVAL; | |
400 | ||
2358b776 AL |
401 | if (min_vol < desc->min) |
402 | min_vol = desc->min; | |
bd6ca2cf | 403 | |
2358b776 | 404 | i = DIV_ROUND_UP(min_vol - desc->min, desc->step); |
bd6ca2cf | 405 | |
bd6ca2cf | 406 | if (desc->min + desc->step * i > max_vol) |
bd6ca2cf MH |
407 | return -EINVAL; |
408 | ||
409 | return i; | |
410 | } | |
411 | ||
412 | static int max8997_set_voltage_charger_cv(struct regulator_dev *rdev, | |
413 | int min_uV, int max_uV, unsigned *selector) | |
414 | { | |
415 | struct max8997_data *max8997 = rdev_get_drvdata(rdev); | |
416 | struct i2c_client *i2c = max8997->iodev->i2c; | |
b3e1348e | 417 | int rid = rdev_get_id(rdev); |
bd6ca2cf MH |
418 | int lb, ub; |
419 | int reg, shift = 0, mask, ret = 0; | |
420 | u8 val = 0x0; | |
421 | ||
422 | if (rid != MAX8997_CHARGER_CV) | |
423 | return -EINVAL; | |
424 | ||
425 | ret = max8997_get_voltage_register(rdev, ®, &shift, &mask); | |
426 | if (ret) | |
427 | return ret; | |
428 | ||
429 | if (max_uV < 4000000 || min_uV > 4350000) | |
430 | return -EINVAL; | |
431 | ||
432 | if (min_uV <= 4000000) { | |
433 | if (max_uV >= 4000000) | |
434 | return -EINVAL; | |
435 | else | |
436 | val = 0x1; | |
437 | } else if (min_uV <= 4200000 && max_uV >= 4200000) | |
438 | val = 0x0; | |
439 | else { | |
440 | lb = (min_uV - 4000001) / 20000 + 2; | |
441 | ub = (max_uV - 4000000) / 20000 + 1; | |
442 | ||
443 | if (lb > ub) | |
444 | return -EINVAL; | |
445 | ||
446 | if (lb < 0xf) | |
447 | val = lb; | |
448 | else { | |
449 | if (ub >= 0xf) | |
450 | val = 0xf; | |
451 | else | |
452 | return -EINVAL; | |
453 | } | |
454 | } | |
455 | ||
456 | *selector = val; | |
457 | ||
458 | ret = max8997_update_reg(i2c, reg, val << shift, mask); | |
459 | ||
460 | return ret; | |
461 | } | |
462 | ||
463 | /* | |
464 | * For LDO1 ~ LDO21, BUCK1~5, BUCK7, CHARGER, CHARGER_TOPOFF | |
465 | * BUCK1, 2, and 5 are available if they are not controlled by gpio | |
466 | */ | |
467 | static int max8997_set_voltage_ldobuck(struct regulator_dev *rdev, | |
468 | int min_uV, int max_uV, unsigned *selector) | |
469 | { | |
470 | struct max8997_data *max8997 = rdev_get_drvdata(rdev); | |
471 | struct i2c_client *i2c = max8997->iodev->i2c; | |
bd6ca2cf | 472 | const struct voltage_map_desc *desc; |
b3e1348e | 473 | int rid = rdev_get_id(rdev); |
62bc4d4a | 474 | int i, reg, shift, mask, ret; |
bd6ca2cf MH |
475 | |
476 | switch (rid) { | |
477 | case MAX8997_LDO1 ... MAX8997_LDO21: | |
478 | break; | |
479 | case MAX8997_BUCK1 ... MAX8997_BUCK5: | |
480 | break; | |
481 | case MAX8997_BUCK6: | |
482 | return -EINVAL; | |
483 | case MAX8997_BUCK7: | |
484 | break; | |
485 | case MAX8997_CHARGER: | |
486 | break; | |
487 | case MAX8997_CHARGER_TOPOFF: | |
488 | break; | |
489 | default: | |
490 | return -EINVAL; | |
491 | } | |
492 | ||
493 | desc = reg_voltage_map[rid]; | |
494 | ||
bc3b7756 | 495 | i = max8997_get_voltage_proper_val(desc, min_uV, max_uV); |
bd6ca2cf MH |
496 | if (i < 0) |
497 | return i; | |
498 | ||
499 | ret = max8997_get_voltage_register(rdev, ®, &shift, &mask); | |
500 | if (ret) | |
501 | return ret; | |
502 | ||
bd6ca2cf MH |
503 | ret = max8997_update_reg(i2c, reg, i << shift, mask << shift); |
504 | *selector = i; | |
505 | ||
62bc4d4a AL |
506 | return ret; |
507 | } | |
508 | ||
24bd4109 | 509 | static int max8997_set_voltage_buck_time_sel(struct regulator_dev *rdev, |
62bc4d4a AL |
510 | unsigned int old_selector, |
511 | unsigned int new_selector) | |
512 | { | |
513 | struct max8997_data *max8997 = rdev_get_drvdata(rdev); | |
514 | int rid = rdev_get_id(rdev); | |
515 | const struct voltage_map_desc *desc = reg_voltage_map[rid]; | |
516 | ||
517 | /* Delay is required only if the voltage is increasing */ | |
518 | if (old_selector >= new_selector) | |
519 | return 0; | |
520 | ||
521 | /* No need to delay if gpio_dvs_mode */ | |
522 | switch (rid) { | |
523 | case MAX8997_BUCK1: | |
524 | if (max8997->buck1_gpiodvs) | |
525 | return 0; | |
526 | break; | |
527 | case MAX8997_BUCK2: | |
528 | if (max8997->buck2_gpiodvs) | |
529 | return 0; | |
530 | break; | |
531 | case MAX8997_BUCK5: | |
532 | if (max8997->buck5_gpiodvs) | |
533 | return 0; | |
534 | break; | |
bd6ca2cf MH |
535 | } |
536 | ||
62bc4d4a AL |
537 | switch (rid) { |
538 | case MAX8997_BUCK1: | |
539 | case MAX8997_BUCK2: | |
540 | case MAX8997_BUCK4: | |
541 | case MAX8997_BUCK5: | |
542 | return DIV_ROUND_UP(desc->step * (new_selector - old_selector), | |
bc3b7756 | 543 | max8997->ramp_delay * 1000); |
bd6ca2cf MH |
544 | } |
545 | ||
62bc4d4a | 546 | return 0; |
bd6ca2cf MH |
547 | } |
548 | ||
549 | /* | |
550 | * Assess the damage on the voltage setting of BUCK1,2,5 by the change. | |
551 | * | |
552 | * When GPIO-DVS mode is used for multiple bucks, changing the voltage value | |
553 | * of one of the bucks may affect that of another buck, which is the side | |
554 | * effect of the change (set_voltage). This function examines the GPIO-DVS | |
555 | * configurations and checks whether such side-effect exists. | |
556 | */ | |
557 | static int max8997_assess_side_effect(struct regulator_dev *rdev, | |
558 | u8 new_val, int *best) | |
559 | { | |
560 | struct max8997_data *max8997 = rdev_get_drvdata(rdev); | |
b3e1348e | 561 | int rid = rdev_get_id(rdev); |
bd6ca2cf MH |
562 | u8 *buckx_val[3]; |
563 | bool buckx_gpiodvs[3]; | |
564 | int side_effect[8]; | |
565 | int min_side_effect = INT_MAX; | |
566 | int i; | |
567 | ||
568 | *best = -1; | |
569 | ||
570 | switch (rid) { | |
571 | case MAX8997_BUCK1: | |
572 | rid = 0; | |
573 | break; | |
574 | case MAX8997_BUCK2: | |
575 | rid = 1; | |
576 | break; | |
577 | case MAX8997_BUCK5: | |
578 | rid = 2; | |
579 | break; | |
580 | default: | |
581 | return -EINVAL; | |
582 | } | |
583 | ||
584 | buckx_val[0] = max8997->buck1_vol; | |
585 | buckx_val[1] = max8997->buck2_vol; | |
586 | buckx_val[2] = max8997->buck5_vol; | |
6e0414a5 MH |
587 | buckx_gpiodvs[0] = max8997->buck1_gpiodvs; |
588 | buckx_gpiodvs[1] = max8997->buck2_gpiodvs; | |
589 | buckx_gpiodvs[2] = max8997->buck5_gpiodvs; | |
bd6ca2cf MH |
590 | |
591 | for (i = 0; i < 8; i++) { | |
592 | int others; | |
593 | ||
594 | if (new_val != (buckx_val[rid])[i]) { | |
595 | side_effect[i] = -1; | |
596 | continue; | |
597 | } | |
598 | ||
599 | side_effect[i] = 0; | |
600 | for (others = 0; others < 3; others++) { | |
601 | int diff; | |
602 | ||
603 | if (others == rid) | |
604 | continue; | |
605 | if (buckx_gpiodvs[others] == false) | |
606 | continue; /* Not affected */ | |
607 | diff = (buckx_val[others])[i] - | |
608 | (buckx_val[others])[max8997->buck125_gpioindex]; | |
609 | if (diff > 0) | |
610 | side_effect[i] += diff; | |
611 | else if (diff < 0) | |
612 | side_effect[i] -= diff; | |
613 | } | |
614 | if (side_effect[i] == 0) { | |
615 | *best = i; | |
616 | return 0; /* NO SIDE EFFECT! Use This! */ | |
617 | } | |
618 | if (side_effect[i] < min_side_effect) { | |
619 | min_side_effect = side_effect[i]; | |
620 | *best = i; | |
621 | } | |
622 | } | |
623 | ||
624 | if (*best == -1) | |
625 | return -EINVAL; | |
626 | ||
627 | return side_effect[*best]; | |
628 | } | |
629 | ||
630 | /* | |
631 | * For Buck 1 ~ 5 and 7. If it is not controlled by GPIO, this calls | |
632 | * max8997_set_voltage_ldobuck to do the job. | |
633 | */ | |
634 | static int max8997_set_voltage_buck(struct regulator_dev *rdev, | |
635 | int min_uV, int max_uV, unsigned *selector) | |
636 | { | |
637 | struct max8997_data *max8997 = rdev_get_drvdata(rdev); | |
b3e1348e | 638 | int rid = rdev_get_id(rdev); |
bd6ca2cf MH |
639 | const struct voltage_map_desc *desc; |
640 | int new_val, new_idx, damage, tmp_val, tmp_idx, tmp_dmg; | |
641 | bool gpio_dvs_mode = false; | |
bd6ca2cf MH |
642 | |
643 | if (rid < MAX8997_BUCK1 || rid > MAX8997_BUCK7) | |
644 | return -EINVAL; | |
645 | ||
646 | switch (rid) { | |
647 | case MAX8997_BUCK1: | |
6e0414a5 | 648 | if (max8997->buck1_gpiodvs) |
bd6ca2cf MH |
649 | gpio_dvs_mode = true; |
650 | break; | |
651 | case MAX8997_BUCK2: | |
6e0414a5 | 652 | if (max8997->buck2_gpiodvs) |
bd6ca2cf MH |
653 | gpio_dvs_mode = true; |
654 | break; | |
655 | case MAX8997_BUCK5: | |
6e0414a5 | 656 | if (max8997->buck5_gpiodvs) |
bd6ca2cf MH |
657 | gpio_dvs_mode = true; |
658 | break; | |
659 | } | |
660 | ||
661 | if (!gpio_dvs_mode) | |
662 | return max8997_set_voltage_ldobuck(rdev, min_uV, max_uV, | |
663 | selector); | |
664 | ||
665 | desc = reg_voltage_map[rid]; | |
bc3b7756 | 666 | new_val = max8997_get_voltage_proper_val(desc, min_uV, max_uV); |
bd6ca2cf MH |
667 | if (new_val < 0) |
668 | return new_val; | |
669 | ||
670 | tmp_dmg = INT_MAX; | |
671 | tmp_idx = -1; | |
672 | tmp_val = -1; | |
673 | do { | |
674 | damage = max8997_assess_side_effect(rdev, new_val, &new_idx); | |
675 | if (damage == 0) | |
676 | goto out; | |
677 | ||
678 | if (tmp_dmg > damage) { | |
679 | tmp_idx = new_idx; | |
680 | tmp_val = new_val; | |
681 | tmp_dmg = damage; | |
682 | } | |
683 | ||
684 | new_val++; | |
f55205f4 | 685 | } while (desc->min + desc->step * new_val <= desc->max); |
bd6ca2cf MH |
686 | |
687 | new_idx = tmp_idx; | |
688 | new_val = tmp_val; | |
689 | ||
6e0414a5 | 690 | if (max8997->ignore_gpiodvs_side_effect == false) |
bd6ca2cf MH |
691 | return -EINVAL; |
692 | ||
c4e3b144 JH |
693 | dev_warn(&rdev->dev, |
694 | "MAX8997 GPIO-DVS Side Effect Warning: GPIO SET: %d -> %d\n", | |
695 | max8997->buck125_gpioindex, tmp_idx); | |
bd6ca2cf MH |
696 | |
697 | out: | |
698 | if (new_idx < 0 || new_val < 0) | |
699 | return -EINVAL; | |
700 | ||
701 | max8997->buck125_gpioindex = new_idx; | |
702 | max8997_set_gpio(max8997); | |
703 | *selector = new_val; | |
704 | ||
705 | return 0; | |
706 | } | |
707 | ||
bd6ca2cf | 708 | /* For SAFEOUT1 and SAFEOUT2 */ |
b79ca051 AL |
709 | static int max8997_set_voltage_safeout_sel(struct regulator_dev *rdev, |
710 | unsigned selector) | |
bd6ca2cf MH |
711 | { |
712 | struct max8997_data *max8997 = rdev_get_drvdata(rdev); | |
713 | struct i2c_client *i2c = max8997->iodev->i2c; | |
b3e1348e | 714 | int rid = rdev_get_id(rdev); |
bd6ca2cf | 715 | int reg, shift = 0, mask, ret; |
bd6ca2cf MH |
716 | |
717 | if (rid != MAX8997_ESAFEOUT1 && rid != MAX8997_ESAFEOUT2) | |
718 | return -EINVAL; | |
719 | ||
bd6ca2cf MH |
720 | ret = max8997_get_voltage_register(rdev, ®, &shift, &mask); |
721 | if (ret) | |
722 | return ret; | |
723 | ||
b79ca051 | 724 | return max8997_update_reg(i2c, reg, selector << shift, mask << shift); |
bd6ca2cf MH |
725 | } |
726 | ||
bd6ca2cf MH |
727 | static int max8997_reg_disable_suspend(struct regulator_dev *rdev) |
728 | { | |
729 | struct max8997_data *max8997 = rdev_get_drvdata(rdev); | |
730 | struct i2c_client *i2c = max8997->iodev->i2c; | |
731 | int ret, reg, mask, pattern; | |
b3e1348e | 732 | int rid = rdev_get_id(rdev); |
bd6ca2cf MH |
733 | |
734 | ret = max8997_get_enable_register(rdev, ®, &mask, &pattern); | |
735 | if (ret) | |
736 | return ret; | |
737 | ||
738 | max8997_read_reg(i2c, reg, &max8997->saved_states[rid]); | |
739 | ||
740 | if (rid == MAX8997_LDO1 || | |
741 | rid == MAX8997_LDO10 || | |
742 | rid == MAX8997_LDO21) { | |
743 | dev_dbg(&rdev->dev, "Conditional Power-Off for %s\n", | |
744 | rdev->desc->name); | |
745 | return max8997_update_reg(i2c, reg, 0x40, mask); | |
746 | } | |
747 | ||
748 | dev_dbg(&rdev->dev, "Full Power-Off for %s (%xh -> %xh)\n", | |
749 | rdev->desc->name, max8997->saved_states[rid] & mask, | |
750 | (~pattern) & mask); | |
751 | return max8997_update_reg(i2c, reg, ~pattern, mask); | |
752 | } | |
753 | ||
754 | static struct regulator_ops max8997_ldo_ops = { | |
755 | .list_voltage = max8997_list_voltage, | |
756 | .is_enabled = max8997_reg_is_enabled, | |
757 | .enable = max8997_reg_enable, | |
758 | .disable = max8997_reg_disable, | |
9e96b3a7 | 759 | .get_voltage_sel = max8997_get_voltage_sel, |
bd6ca2cf | 760 | .set_voltage = max8997_set_voltage_ldobuck, |
bd6ca2cf MH |
761 | .set_suspend_disable = max8997_reg_disable_suspend, |
762 | }; | |
763 | ||
764 | static struct regulator_ops max8997_buck_ops = { | |
765 | .list_voltage = max8997_list_voltage, | |
766 | .is_enabled = max8997_reg_is_enabled, | |
767 | .enable = max8997_reg_enable, | |
768 | .disable = max8997_reg_disable, | |
9e96b3a7 | 769 | .get_voltage_sel = max8997_get_voltage_sel, |
bd6ca2cf | 770 | .set_voltage = max8997_set_voltage_buck, |
24bd4109 | 771 | .set_voltage_time_sel = max8997_set_voltage_buck_time_sel, |
bd6ca2cf MH |
772 | .set_suspend_disable = max8997_reg_disable_suspend, |
773 | }; | |
774 | ||
775 | static struct regulator_ops max8997_fixedvolt_ops = { | |
776 | .list_voltage = max8997_list_voltage, | |
777 | .is_enabled = max8997_reg_is_enabled, | |
778 | .enable = max8997_reg_enable, | |
779 | .disable = max8997_reg_disable, | |
bd6ca2cf MH |
780 | .set_suspend_disable = max8997_reg_disable_suspend, |
781 | }; | |
782 | ||
783 | static struct regulator_ops max8997_safeout_ops = { | |
b79ca051 | 784 | .list_voltage = regulator_list_voltage_table, |
bd6ca2cf MH |
785 | .is_enabled = max8997_reg_is_enabled, |
786 | .enable = max8997_reg_enable, | |
787 | .disable = max8997_reg_disable, | |
9e96b3a7 | 788 | .get_voltage_sel = max8997_get_voltage_sel, |
b79ca051 | 789 | .set_voltage_sel = max8997_set_voltage_safeout_sel, |
bd6ca2cf MH |
790 | .set_suspend_disable = max8997_reg_disable_suspend, |
791 | }; | |
792 | ||
793 | static struct regulator_ops max8997_fixedstate_ops = { | |
794 | .list_voltage = max8997_list_voltage_charger_cv, | |
9e96b3a7 | 795 | .get_voltage_sel = max8997_get_voltage_sel, |
bd6ca2cf MH |
796 | .set_voltage = max8997_set_voltage_charger_cv, |
797 | }; | |
798 | ||
9e96b3a7 AL |
799 | static int max8997_set_current_limit(struct regulator_dev *rdev, |
800 | int min_uA, int max_uA) | |
bd6ca2cf MH |
801 | { |
802 | unsigned dummy; | |
9e96b3a7 | 803 | int rid = rdev_get_id(rdev); |
bd6ca2cf | 804 | |
9e96b3a7 AL |
805 | if (rid != MAX8997_CHARGER && rid != MAX8997_CHARGER_TOPOFF) |
806 | return -EINVAL; | |
bd6ca2cf | 807 | |
9e96b3a7 AL |
808 | /* Reuse max8997_set_voltage_ldobuck to set current_limit. */ |
809 | return max8997_set_voltage_ldobuck(rdev, min_uA, max_uA, &dummy); | |
bd6ca2cf MH |
810 | } |
811 | ||
9e96b3a7 AL |
812 | static int max8997_get_current_limit(struct regulator_dev *rdev) |
813 | { | |
814 | int sel, rid = rdev_get_id(rdev); | |
815 | ||
816 | if (rid != MAX8997_CHARGER && rid != MAX8997_CHARGER_TOPOFF) | |
817 | return -EINVAL; | |
818 | ||
819 | sel = max8997_get_voltage_sel(rdev); | |
820 | if (sel < 0) | |
821 | return sel; | |
822 | ||
823 | /* Reuse max8997_list_voltage to get current_limit. */ | |
824 | return max8997_list_voltage(rdev, sel); | |
825 | } | |
bd6ca2cf MH |
826 | |
827 | static struct regulator_ops max8997_charger_ops = { | |
828 | .is_enabled = max8997_reg_is_enabled, | |
829 | .enable = max8997_reg_enable, | |
830 | .disable = max8997_reg_disable, | |
9e96b3a7 AL |
831 | .get_current_limit = max8997_get_current_limit, |
832 | .set_current_limit = max8997_set_current_limit, | |
bd6ca2cf MH |
833 | }; |
834 | ||
835 | static struct regulator_ops max8997_charger_fixedstate_ops = { | |
9e96b3a7 AL |
836 | .get_current_limit = max8997_get_current_limit, |
837 | .set_current_limit = max8997_set_current_limit, | |
bd6ca2cf MH |
838 | }; |
839 | ||
4533f80e AL |
840 | #define MAX8997_VOLTAGE_REGULATOR(_name, _ops) {\ |
841 | .name = #_name, \ | |
842 | .id = MAX8997_##_name, \ | |
843 | .ops = &_ops, \ | |
bd6ca2cf MH |
844 | .type = REGULATOR_VOLTAGE, \ |
845 | .owner = THIS_MODULE, \ | |
846 | } | |
4533f80e AL |
847 | |
848 | #define MAX8997_CURRENT_REGULATOR(_name, _ops) {\ | |
849 | .name = #_name, \ | |
850 | .id = MAX8997_##_name, \ | |
851 | .ops = &_ops, \ | |
852 | .type = REGULATOR_CURRENT, \ | |
bd6ca2cf MH |
853 | .owner = THIS_MODULE, \ |
854 | } | |
855 | ||
856 | static struct regulator_desc regulators[] = { | |
4533f80e AL |
857 | MAX8997_VOLTAGE_REGULATOR(LDO1, max8997_ldo_ops), |
858 | MAX8997_VOLTAGE_REGULATOR(LDO2, max8997_ldo_ops), | |
859 | MAX8997_VOLTAGE_REGULATOR(LDO3, max8997_ldo_ops), | |
860 | MAX8997_VOLTAGE_REGULATOR(LDO4, max8997_ldo_ops), | |
861 | MAX8997_VOLTAGE_REGULATOR(LDO5, max8997_ldo_ops), | |
862 | MAX8997_VOLTAGE_REGULATOR(LDO6, max8997_ldo_ops), | |
863 | MAX8997_VOLTAGE_REGULATOR(LDO7, max8997_ldo_ops), | |
864 | MAX8997_VOLTAGE_REGULATOR(LDO8, max8997_ldo_ops), | |
865 | MAX8997_VOLTAGE_REGULATOR(LDO9, max8997_ldo_ops), | |
866 | MAX8997_VOLTAGE_REGULATOR(LDO10, max8997_ldo_ops), | |
867 | MAX8997_VOLTAGE_REGULATOR(LDO11, max8997_ldo_ops), | |
868 | MAX8997_VOLTAGE_REGULATOR(LDO12, max8997_ldo_ops), | |
869 | MAX8997_VOLTAGE_REGULATOR(LDO13, max8997_ldo_ops), | |
870 | MAX8997_VOLTAGE_REGULATOR(LDO14, max8997_ldo_ops), | |
871 | MAX8997_VOLTAGE_REGULATOR(LDO15, max8997_ldo_ops), | |
872 | MAX8997_VOLTAGE_REGULATOR(LDO16, max8997_ldo_ops), | |
873 | MAX8997_VOLTAGE_REGULATOR(LDO17, max8997_ldo_ops), | |
874 | MAX8997_VOLTAGE_REGULATOR(LDO18, max8997_ldo_ops), | |
875 | MAX8997_VOLTAGE_REGULATOR(LDO21, max8997_ldo_ops), | |
876 | MAX8997_VOLTAGE_REGULATOR(BUCK1, max8997_buck_ops), | |
877 | MAX8997_VOLTAGE_REGULATOR(BUCK2, max8997_buck_ops), | |
878 | MAX8997_VOLTAGE_REGULATOR(BUCK3, max8997_buck_ops), | |
879 | MAX8997_VOLTAGE_REGULATOR(BUCK4, max8997_buck_ops), | |
880 | MAX8997_VOLTAGE_REGULATOR(BUCK5, max8997_buck_ops), | |
881 | MAX8997_VOLTAGE_REGULATOR(BUCK6, max8997_fixedvolt_ops), | |
882 | MAX8997_VOLTAGE_REGULATOR(BUCK7, max8997_buck_ops), | |
883 | MAX8997_VOLTAGE_REGULATOR(EN32KHZ_AP, max8997_fixedvolt_ops), | |
884 | MAX8997_VOLTAGE_REGULATOR(EN32KHZ_CP, max8997_fixedvolt_ops), | |
885 | MAX8997_VOLTAGE_REGULATOR(ENVICHG, max8997_fixedvolt_ops), | |
886 | MAX8997_VOLTAGE_REGULATOR(ESAFEOUT1, max8997_safeout_ops), | |
887 | MAX8997_VOLTAGE_REGULATOR(ESAFEOUT2, max8997_safeout_ops), | |
888 | MAX8997_VOLTAGE_REGULATOR(CHARGER_CV, max8997_fixedstate_ops), | |
889 | MAX8997_CURRENT_REGULATOR(CHARGER, max8997_charger_ops), | |
890 | MAX8997_CURRENT_REGULATOR(CHARGER_TOPOFF, | |
891 | max8997_charger_fixedstate_ops), | |
bd6ca2cf MH |
892 | }; |
893 | ||
77b71b37 | 894 | #ifdef CONFIG_OF |
b4895e2c | 895 | static int max8997_pmic_dt_parse_dvs_gpio(struct platform_device *pdev, |
77b71b37 TA |
896 | struct max8997_platform_data *pdata, |
897 | struct device_node *pmic_np) | |
898 | { | |
899 | int i, gpio; | |
900 | ||
901 | for (i = 0; i < 3; i++) { | |
902 | gpio = of_get_named_gpio(pmic_np, | |
903 | "max8997,pmic-buck125-dvs-gpios", i); | |
904 | if (!gpio_is_valid(gpio)) { | |
b4895e2c | 905 | dev_err(&pdev->dev, "invalid gpio[%d]: %d\n", i, gpio); |
77b71b37 TA |
906 | return -EINVAL; |
907 | } | |
908 | pdata->buck125_gpios[i] = gpio; | |
909 | } | |
910 | return 0; | |
911 | } | |
912 | ||
b4895e2c | 913 | static int max8997_pmic_dt_parse_pdata(struct platform_device *pdev, |
77b71b37 TA |
914 | struct max8997_platform_data *pdata) |
915 | { | |
b4895e2c | 916 | struct max8997_dev *iodev = dev_get_drvdata(pdev->dev.parent); |
77b71b37 TA |
917 | struct device_node *pmic_np, *regulators_np, *reg_np; |
918 | struct max8997_regulator_data *rdata; | |
919 | unsigned int i, dvs_voltage_nr = 1, ret; | |
920 | ||
c92f5dd2 | 921 | pmic_np = of_node_get(iodev->dev->of_node); |
77b71b37 | 922 | if (!pmic_np) { |
b4895e2c | 923 | dev_err(&pdev->dev, "could not find pmic sub-node\n"); |
77b71b37 TA |
924 | return -ENODEV; |
925 | } | |
926 | ||
927 | regulators_np = of_find_node_by_name(pmic_np, "regulators"); | |
928 | if (!regulators_np) { | |
b4895e2c | 929 | dev_err(&pdev->dev, "could not find regulators sub-node\n"); |
77b71b37 TA |
930 | return -EINVAL; |
931 | } | |
932 | ||
933 | /* count the number of regulators to be supported in pmic */ | |
ee70b258 | 934 | pdata->num_regulators = of_get_child_count(regulators_np); |
77b71b37 | 935 | |
b4895e2c | 936 | rdata = devm_kzalloc(&pdev->dev, sizeof(*rdata) * |
77b71b37 TA |
937 | pdata->num_regulators, GFP_KERNEL); |
938 | if (!rdata) { | |
c92f5dd2 | 939 | of_node_put(regulators_np); |
b4895e2c | 940 | dev_err(&pdev->dev, "could not allocate memory for regulator data\n"); |
77b71b37 TA |
941 | return -ENOMEM; |
942 | } | |
943 | ||
944 | pdata->regulators = rdata; | |
945 | for_each_child_of_node(regulators_np, reg_np) { | |
946 | for (i = 0; i < ARRAY_SIZE(regulators); i++) | |
947 | if (!of_node_cmp(reg_np->name, regulators[i].name)) | |
948 | break; | |
949 | ||
950 | if (i == ARRAY_SIZE(regulators)) { | |
b4895e2c AL |
951 | dev_warn(&pdev->dev, "don't know how to configure regulator %s\n", |
952 | reg_np->name); | |
77b71b37 TA |
953 | continue; |
954 | } | |
955 | ||
956 | rdata->id = i; | |
b4895e2c AL |
957 | rdata->initdata = of_get_regulator_init_data(&pdev->dev, |
958 | reg_np); | |
77b71b37 TA |
959 | rdata->reg_node = reg_np; |
960 | rdata++; | |
961 | } | |
c92f5dd2 | 962 | of_node_put(regulators_np); |
77b71b37 TA |
963 | |
964 | if (of_get_property(pmic_np, "max8997,pmic-buck1-uses-gpio-dvs", NULL)) | |
965 | pdata->buck1_gpiodvs = true; | |
966 | ||
967 | if (of_get_property(pmic_np, "max8997,pmic-buck2-uses-gpio-dvs", NULL)) | |
968 | pdata->buck2_gpiodvs = true; | |
969 | ||
970 | if (of_get_property(pmic_np, "max8997,pmic-buck5-uses-gpio-dvs", NULL)) | |
971 | pdata->buck5_gpiodvs = true; | |
972 | ||
973 | if (pdata->buck1_gpiodvs || pdata->buck2_gpiodvs || | |
974 | pdata->buck5_gpiodvs) { | |
b4895e2c | 975 | ret = max8997_pmic_dt_parse_dvs_gpio(pdev, pdata, pmic_np); |
77b71b37 TA |
976 | if (ret) |
977 | return -EINVAL; | |
978 | ||
979 | if (of_property_read_u32(pmic_np, | |
980 | "max8997,pmic-buck125-default-dvs-idx", | |
981 | &pdata->buck125_default_idx)) { | |
982 | pdata->buck125_default_idx = 0; | |
983 | } else { | |
984 | if (pdata->buck125_default_idx >= 8) { | |
985 | pdata->buck125_default_idx = 0; | |
b4895e2c | 986 | dev_info(&pdev->dev, "invalid value for default dvs index, using 0 instead\n"); |
77b71b37 TA |
987 | } |
988 | } | |
989 | ||
990 | if (of_get_property(pmic_np, | |
991 | "max8997,pmic-ignore-gpiodvs-side-effect", NULL)) | |
992 | pdata->ignore_gpiodvs_side_effect = true; | |
993 | ||
994 | dvs_voltage_nr = 8; | |
995 | } | |
996 | ||
997 | if (of_property_read_u32_array(pmic_np, | |
998 | "max8997,pmic-buck1-dvs-voltage", | |
999 | pdata->buck1_voltage, dvs_voltage_nr)) { | |
b4895e2c | 1000 | dev_err(&pdev->dev, "buck1 voltages not specified\n"); |
77b71b37 TA |
1001 | return -EINVAL; |
1002 | } | |
1003 | ||
1004 | if (of_property_read_u32_array(pmic_np, | |
1005 | "max8997,pmic-buck2-dvs-voltage", | |
1006 | pdata->buck2_voltage, dvs_voltage_nr)) { | |
b4895e2c | 1007 | dev_err(&pdev->dev, "buck2 voltages not specified\n"); |
77b71b37 TA |
1008 | return -EINVAL; |
1009 | } | |
1010 | ||
1011 | if (of_property_read_u32_array(pmic_np, | |
1012 | "max8997,pmic-buck5-dvs-voltage", | |
1013 | pdata->buck5_voltage, dvs_voltage_nr)) { | |
b4895e2c | 1014 | dev_err(&pdev->dev, "buck5 voltages not specified\n"); |
77b71b37 TA |
1015 | return -EINVAL; |
1016 | } | |
1017 | ||
1018 | return 0; | |
1019 | } | |
1020 | #else | |
b4895e2c | 1021 | static int max8997_pmic_dt_parse_pdata(struct platform_device *pdev, |
77b71b37 TA |
1022 | struct max8997_platform_data *pdata) |
1023 | { | |
1024 | return 0; | |
1025 | } | |
1026 | #endif /* CONFIG_OF */ | |
1027 | ||
a5023574 | 1028 | static int max8997_pmic_probe(struct platform_device *pdev) |
bd6ca2cf MH |
1029 | { |
1030 | struct max8997_dev *iodev = dev_get_drvdata(pdev->dev.parent); | |
77b71b37 | 1031 | struct max8997_platform_data *pdata = iodev->pdata; |
c172708d | 1032 | struct regulator_config config = { }; |
bd6ca2cf MH |
1033 | struct regulator_dev **rdev; |
1034 | struct max8997_data *max8997; | |
1035 | struct i2c_client *i2c; | |
068a8c82 | 1036 | int i, ret, size, nr_dvs; |
bd6ca2cf MH |
1037 | u8 max_buck1 = 0, max_buck2 = 0, max_buck5 = 0; |
1038 | ||
a2f07305 AL |
1039 | if (!pdata) { |
1040 | dev_err(&pdev->dev, "No platform init data supplied.\n"); | |
bd6ca2cf MH |
1041 | return -ENODEV; |
1042 | } | |
1043 | ||
77b71b37 | 1044 | if (iodev->dev->of_node) { |
b4895e2c | 1045 | ret = max8997_pmic_dt_parse_pdata(pdev, pdata); |
77b71b37 TA |
1046 | if (ret) |
1047 | return ret; | |
1048 | } | |
1049 | ||
8ae5767b AL |
1050 | max8997 = devm_kzalloc(&pdev->dev, sizeof(struct max8997_data), |
1051 | GFP_KERNEL); | |
bd6ca2cf MH |
1052 | if (!max8997) |
1053 | return -ENOMEM; | |
1054 | ||
1055 | size = sizeof(struct regulator_dev *) * pdata->num_regulators; | |
8ae5767b AL |
1056 | max8997->rdev = devm_kzalloc(&pdev->dev, size, GFP_KERNEL); |
1057 | if (!max8997->rdev) | |
bd6ca2cf | 1058 | return -ENOMEM; |
bd6ca2cf MH |
1059 | |
1060 | rdev = max8997->rdev; | |
1061 | max8997->dev = &pdev->dev; | |
1062 | max8997->iodev = iodev; | |
1063 | max8997->num_regulators = pdata->num_regulators; | |
1064 | platform_set_drvdata(pdev, max8997); | |
1065 | i2c = max8997->iodev->i2c; | |
1066 | ||
1067 | max8997->buck125_gpioindex = pdata->buck125_default_idx; | |
6e0414a5 MH |
1068 | max8997->buck1_gpiodvs = pdata->buck1_gpiodvs; |
1069 | max8997->buck2_gpiodvs = pdata->buck2_gpiodvs; | |
1070 | max8997->buck5_gpiodvs = pdata->buck5_gpiodvs; | |
1071 | memcpy(max8997->buck125_gpios, pdata->buck125_gpios, sizeof(int) * 3); | |
1072 | max8997->ignore_gpiodvs_side_effect = pdata->ignore_gpiodvs_side_effect; | |
bd6ca2cf | 1073 | |
068a8c82 TA |
1074 | nr_dvs = (pdata->buck1_gpiodvs || pdata->buck2_gpiodvs || |
1075 | pdata->buck5_gpiodvs) ? 8 : 1; | |
1076 | ||
1077 | for (i = 0; i < nr_dvs; i++) { | |
bd6ca2cf MH |
1078 | max8997->buck1_vol[i] = ret = |
1079 | max8997_get_voltage_proper_val( | |
1080 | &buck1245_voltage_map_desc, | |
bc3b7756 AL |
1081 | pdata->buck1_voltage[i], |
1082 | pdata->buck1_voltage[i] + | |
bd6ca2cf MH |
1083 | buck1245_voltage_map_desc.step); |
1084 | if (ret < 0) | |
4177f95b | 1085 | return ret; |
bd6ca2cf MH |
1086 | |
1087 | max8997->buck2_vol[i] = ret = | |
1088 | max8997_get_voltage_proper_val( | |
1089 | &buck1245_voltage_map_desc, | |
bc3b7756 AL |
1090 | pdata->buck2_voltage[i], |
1091 | pdata->buck2_voltage[i] + | |
bd6ca2cf MH |
1092 | buck1245_voltage_map_desc.step); |
1093 | if (ret < 0) | |
4177f95b | 1094 | return ret; |
bd6ca2cf MH |
1095 | |
1096 | max8997->buck5_vol[i] = ret = | |
1097 | max8997_get_voltage_proper_val( | |
1098 | &buck1245_voltage_map_desc, | |
bc3b7756 AL |
1099 | pdata->buck5_voltage[i], |
1100 | pdata->buck5_voltage[i] + | |
bd6ca2cf MH |
1101 | buck1245_voltage_map_desc.step); |
1102 | if (ret < 0) | |
4177f95b | 1103 | return ret; |
bd6ca2cf MH |
1104 | |
1105 | if (max_buck1 < max8997->buck1_vol[i]) | |
1106 | max_buck1 = max8997->buck1_vol[i]; | |
1107 | if (max_buck2 < max8997->buck2_vol[i]) | |
1108 | max_buck2 = max8997->buck2_vol[i]; | |
1109 | if (max_buck5 < max8997->buck5_vol[i]) | |
1110 | max_buck5 = max8997->buck5_vol[i]; | |
1111 | } | |
1112 | ||
1113 | /* For the safety, set max voltage before setting up */ | |
1114 | for (i = 0; i < 8; i++) { | |
ecb9c4f5 | 1115 | max8997_update_reg(i2c, MAX8997_REG_BUCK1DVS1 + i, |
bd6ca2cf | 1116 | max_buck1, 0x3f); |
ecb9c4f5 | 1117 | max8997_update_reg(i2c, MAX8997_REG_BUCK2DVS1 + i, |
bd6ca2cf | 1118 | max_buck2, 0x3f); |
ecb9c4f5 | 1119 | max8997_update_reg(i2c, MAX8997_REG_BUCK5DVS1 + i, |
bd6ca2cf MH |
1120 | max_buck5, 0x3f); |
1121 | } | |
1122 | ||
11ec7bf0 | 1123 | /* Initialize all the DVS related BUCK registers */ |
068a8c82 | 1124 | for (i = 0; i < nr_dvs; i++) { |
11ec7bf0 TA |
1125 | max8997_update_reg(i2c, MAX8997_REG_BUCK1DVS1 + i, |
1126 | max8997->buck1_vol[i], | |
1127 | 0x3f); | |
1128 | max8997_update_reg(i2c, MAX8997_REG_BUCK2DVS1 + i, | |
1129 | max8997->buck2_vol[i], | |
1130 | 0x3f); | |
1131 | max8997_update_reg(i2c, MAX8997_REG_BUCK5DVS1 + i, | |
1132 | max8997->buck5_vol[i], | |
1133 | 0x3f); | |
1134 | } | |
1135 | ||
bd6ca2cf MH |
1136 | /* |
1137 | * If buck 1, 2, and 5 do not care DVS GPIO settings, ignore them. | |
1138 | * If at least one of them cares, set gpios. | |
1139 | */ | |
1140 | if (pdata->buck1_gpiodvs || pdata->buck2_gpiodvs || | |
1141 | pdata->buck5_gpiodvs) { | |
bd6ca2cf MH |
1142 | |
1143 | if (!gpio_is_valid(pdata->buck125_gpios[0]) || | |
1144 | !gpio_is_valid(pdata->buck125_gpios[1]) || | |
1145 | !gpio_is_valid(pdata->buck125_gpios[2])) { | |
1146 | dev_err(&pdev->dev, "GPIO NOT VALID\n"); | |
4177f95b | 1147 | return -EINVAL; |
bd6ca2cf MH |
1148 | } |
1149 | ||
8fa25eda AL |
1150 | ret = devm_gpio_request(&pdev->dev, pdata->buck125_gpios[0], |
1151 | "MAX8997 SET1"); | |
1152 | if (ret) | |
4177f95b | 1153 | return ret; |
8fa25eda AL |
1154 | |
1155 | ret = devm_gpio_request(&pdev->dev, pdata->buck125_gpios[1], | |
1156 | "MAX8997 SET2"); | |
1157 | if (ret) | |
4177f95b | 1158 | return ret; |
bd6ca2cf | 1159 | |
8fa25eda | 1160 | ret = devm_gpio_request(&pdev->dev, pdata->buck125_gpios[2], |
bd6ca2cf | 1161 | "MAX8997 SET3"); |
8fa25eda | 1162 | if (ret) |
4177f95b | 1163 | return ret; |
bd6ca2cf MH |
1164 | |
1165 | gpio_direction_output(pdata->buck125_gpios[0], | |
1166 | (max8997->buck125_gpioindex >> 2) | |
1167 | & 0x1); /* SET1 */ | |
1168 | gpio_direction_output(pdata->buck125_gpios[1], | |
1169 | (max8997->buck125_gpioindex >> 1) | |
1170 | & 0x1); /* SET2 */ | |
1171 | gpio_direction_output(pdata->buck125_gpios[2], | |
1172 | (max8997->buck125_gpioindex >> 0) | |
1173 | & 0x1); /* SET3 */ | |
bd6ca2cf MH |
1174 | } |
1175 | ||
1176 | /* DVS-GPIO disabled */ | |
1177 | max8997_update_reg(i2c, MAX8997_REG_BUCK1CTRL, (pdata->buck1_gpiodvs) ? | |
1178 | (1 << 1) : (0 << 1), 1 << 1); | |
1179 | max8997_update_reg(i2c, MAX8997_REG_BUCK2CTRL, (pdata->buck2_gpiodvs) ? | |
1180 | (1 << 1) : (0 << 1), 1 << 1); | |
1181 | max8997_update_reg(i2c, MAX8997_REG_BUCK5CTRL, (pdata->buck5_gpiodvs) ? | |
1182 | (1 << 1) : (0 << 1), 1 << 1); | |
1183 | ||
dbb48e7c TB |
1184 | /* Misc Settings */ |
1185 | max8997->ramp_delay = 10; /* set 10mV/us, which is the default */ | |
1186 | max8997_write_reg(i2c, MAX8997_REG_BUCKRAMP, (0xf << 4) | 0x9); | |
1187 | ||
bd6ca2cf MH |
1188 | for (i = 0; i < pdata->num_regulators; i++) { |
1189 | const struct voltage_map_desc *desc; | |
1190 | int id = pdata->regulators[i].id; | |
1191 | ||
1192 | desc = reg_voltage_map[id]; | |
b79ca051 | 1193 | if (desc) { |
bd6ca2cf MH |
1194 | regulators[id].n_voltages = |
1195 | (desc->max - desc->min) / desc->step + 1; | |
b79ca051 AL |
1196 | } else if (id == MAX8997_ESAFEOUT1 || id == MAX8997_ESAFEOUT2) { |
1197 | regulators[id].volt_table = safeoutvolt; | |
1198 | regulators[id].n_voltages = ARRAY_SIZE(safeoutvolt); | |
1199 | } else if (id == MAX8997_CHARGER_CV) { | |
bd6ca2cf | 1200 | regulators[id].n_voltages = 16; |
b79ca051 | 1201 | } |
bd6ca2cf | 1202 | |
c172708d MB |
1203 | config.dev = max8997->dev; |
1204 | config.init_data = pdata->regulators[i].initdata; | |
1205 | config.driver_data = max8997; | |
77b71b37 | 1206 | config.of_node = pdata->regulators[i].reg_node; |
c172708d | 1207 | |
4177f95b SK |
1208 | rdev[i] = devm_regulator_register(&pdev->dev, ®ulators[id], |
1209 | &config); | |
bd6ca2cf | 1210 | if (IS_ERR(rdev[i])) { |
bd6ca2cf MH |
1211 | dev_err(max8997->dev, "regulator init failed for %d\n", |
1212 | id); | |
4177f95b | 1213 | return PTR_ERR(rdev[i]); |
bd6ca2cf MH |
1214 | } |
1215 | } | |
1216 | ||
bd6ca2cf | 1217 | return 0; |
bd6ca2cf MH |
1218 | } |
1219 | ||
1220 | static const struct platform_device_id max8997_pmic_id[] = { | |
1221 | { "max8997-pmic", 0}, | |
1222 | { }, | |
1223 | }; | |
a51b907b | 1224 | MODULE_DEVICE_TABLE(platform, max8997_pmic_id); |
bd6ca2cf MH |
1225 | |
1226 | static struct platform_driver max8997_pmic_driver = { | |
1227 | .driver = { | |
1228 | .name = "max8997-pmic", | |
1229 | .owner = THIS_MODULE, | |
1230 | }, | |
1231 | .probe = max8997_pmic_probe, | |
bd6ca2cf MH |
1232 | .id_table = max8997_pmic_id, |
1233 | }; | |
1234 | ||
1235 | static int __init max8997_pmic_init(void) | |
1236 | { | |
1237 | return platform_driver_register(&max8997_pmic_driver); | |
1238 | } | |
1239 | subsys_initcall(max8997_pmic_init); | |
1240 | ||
1241 | static void __exit max8997_pmic_cleanup(void) | |
1242 | { | |
1243 | platform_driver_unregister(&max8997_pmic_driver); | |
1244 | } | |
1245 | module_exit(max8997_pmic_cleanup); | |
1246 | ||
1247 | MODULE_DESCRIPTION("MAXIM 8997/8966 Regulator Driver"); | |
1248 | MODULE_AUTHOR("MyungJoo Ham <myungjoo.ham@samsung.com>"); | |
1249 | MODULE_LICENSE("GPL"); |