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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> | |
27 | #include <linux/slab.h> | |
65602c32 | 28 | #include <linux/module.h> |
bd6ca2cf MH |
29 | #include <linux/platform_device.h> |
30 | #include <linux/regulator/driver.h> | |
31 | #include <linux/regulator/machine.h> | |
32 | #include <linux/mfd/max8997.h> | |
33 | #include <linux/mfd/max8997-private.h> | |
34 | ||
35 | struct max8997_data { | |
36 | struct device *dev; | |
37 | struct max8997_dev *iodev; | |
38 | int num_regulators; | |
39 | struct regulator_dev **rdev; | |
40 | int ramp_delay; /* in mV/us */ | |
41 | ||
6e0414a5 MH |
42 | bool buck1_gpiodvs; |
43 | bool buck2_gpiodvs; | |
44 | bool buck5_gpiodvs; | |
bd6ca2cf MH |
45 | u8 buck1_vol[8]; |
46 | u8 buck2_vol[8]; | |
47 | u8 buck5_vol[8]; | |
6e0414a5 | 48 | int buck125_gpios[3]; |
bd6ca2cf | 49 | int buck125_gpioindex; |
6e0414a5 | 50 | bool ignore_gpiodvs_side_effect; |
bd6ca2cf MH |
51 | |
52 | u8 saved_states[MAX8997_REG_MAX]; | |
53 | }; | |
54 | ||
55 | static inline void max8997_set_gpio(struct max8997_data *max8997) | |
56 | { | |
bd6ca2cf MH |
57 | int set3 = (max8997->buck125_gpioindex) & 0x1; |
58 | int set2 = ((max8997->buck125_gpioindex) >> 1) & 0x1; | |
59 | int set1 = ((max8997->buck125_gpioindex) >> 2) & 0x1; | |
60 | ||
6e0414a5 MH |
61 | gpio_set_value(max8997->buck125_gpios[0], set1); |
62 | gpio_set_value(max8997->buck125_gpios[1], set2); | |
63 | gpio_set_value(max8997->buck125_gpios[2], set3); | |
bd6ca2cf MH |
64 | } |
65 | ||
66 | struct voltage_map_desc { | |
67 | int min; | |
68 | int max; | |
69 | int step; | |
bd6ca2cf MH |
70 | }; |
71 | ||
72 | /* Voltage maps in mV */ | |
73 | static const struct voltage_map_desc ldo_voltage_map_desc = { | |
0fa310cc | 74 | .min = 800, .max = 3950, .step = 50, |
bd6ca2cf MH |
75 | }; /* LDO1 ~ 18, 21 all */ |
76 | ||
77 | static const struct voltage_map_desc buck1245_voltage_map_desc = { | |
0fa310cc | 78 | .min = 650, .max = 2225, .step = 25, |
bd6ca2cf MH |
79 | }; /* Buck1, 2, 4, 5 */ |
80 | ||
81 | static const struct voltage_map_desc buck37_voltage_map_desc = { | |
0fa310cc | 82 | .min = 750, .max = 3900, .step = 50, |
bd6ca2cf MH |
83 | }; /* Buck3, 7 */ |
84 | ||
85 | /* current map in mA */ | |
86 | static const struct voltage_map_desc charger_current_map_desc = { | |
0fa310cc | 87 | .min = 200, .max = 950, .step = 50, |
bd6ca2cf MH |
88 | }; |
89 | ||
90 | static const struct voltage_map_desc topoff_current_map_desc = { | |
0fa310cc | 91 | .min = 50, .max = 200, .step = 10, |
bd6ca2cf MH |
92 | }; |
93 | ||
94 | static const struct voltage_map_desc *reg_voltage_map[] = { | |
95 | [MAX8997_LDO1] = &ldo_voltage_map_desc, | |
96 | [MAX8997_LDO2] = &ldo_voltage_map_desc, | |
97 | [MAX8997_LDO3] = &ldo_voltage_map_desc, | |
98 | [MAX8997_LDO4] = &ldo_voltage_map_desc, | |
99 | [MAX8997_LDO5] = &ldo_voltage_map_desc, | |
100 | [MAX8997_LDO6] = &ldo_voltage_map_desc, | |
101 | [MAX8997_LDO7] = &ldo_voltage_map_desc, | |
102 | [MAX8997_LDO8] = &ldo_voltage_map_desc, | |
103 | [MAX8997_LDO9] = &ldo_voltage_map_desc, | |
104 | [MAX8997_LDO10] = &ldo_voltage_map_desc, | |
105 | [MAX8997_LDO11] = &ldo_voltage_map_desc, | |
106 | [MAX8997_LDO12] = &ldo_voltage_map_desc, | |
107 | [MAX8997_LDO13] = &ldo_voltage_map_desc, | |
108 | [MAX8997_LDO14] = &ldo_voltage_map_desc, | |
109 | [MAX8997_LDO15] = &ldo_voltage_map_desc, | |
110 | [MAX8997_LDO16] = &ldo_voltage_map_desc, | |
111 | [MAX8997_LDO17] = &ldo_voltage_map_desc, | |
112 | [MAX8997_LDO18] = &ldo_voltage_map_desc, | |
113 | [MAX8997_LDO21] = &ldo_voltage_map_desc, | |
114 | [MAX8997_BUCK1] = &buck1245_voltage_map_desc, | |
115 | [MAX8997_BUCK2] = &buck1245_voltage_map_desc, | |
116 | [MAX8997_BUCK3] = &buck37_voltage_map_desc, | |
117 | [MAX8997_BUCK4] = &buck1245_voltage_map_desc, | |
118 | [MAX8997_BUCK5] = &buck1245_voltage_map_desc, | |
119 | [MAX8997_BUCK6] = NULL, | |
120 | [MAX8997_BUCK7] = &buck37_voltage_map_desc, | |
121 | [MAX8997_EN32KHZ_AP] = NULL, | |
122 | [MAX8997_EN32KHZ_CP] = NULL, | |
123 | [MAX8997_ENVICHG] = NULL, | |
124 | [MAX8997_ESAFEOUT1] = NULL, | |
125 | [MAX8997_ESAFEOUT2] = NULL, | |
126 | [MAX8997_CHARGER_CV] = NULL, | |
127 | [MAX8997_CHARGER] = &charger_current_map_desc, | |
128 | [MAX8997_CHARGER_TOPOFF] = &topoff_current_map_desc, | |
129 | }; | |
130 | ||
bd6ca2cf MH |
131 | static int max8997_list_voltage_safeout(struct regulator_dev *rdev, |
132 | unsigned int selector) | |
133 | { | |
b3e1348e | 134 | int rid = rdev_get_id(rdev); |
bd6ca2cf MH |
135 | |
136 | if (rid == MAX8997_ESAFEOUT1 || rid == MAX8997_ESAFEOUT2) { | |
137 | switch (selector) { | |
138 | case 0: | |
139 | return 4850000; | |
140 | case 1: | |
141 | return 4900000; | |
142 | case 2: | |
143 | return 4950000; | |
144 | case 3: | |
145 | return 3300000; | |
146 | default: | |
147 | return -EINVAL; | |
148 | } | |
149 | } | |
150 | ||
151 | return -EINVAL; | |
152 | } | |
153 | ||
154 | static int max8997_list_voltage_charger_cv(struct regulator_dev *rdev, | |
155 | unsigned int selector) | |
156 | { | |
b3e1348e | 157 | int rid = rdev_get_id(rdev); |
bd6ca2cf MH |
158 | |
159 | if (rid != MAX8997_CHARGER_CV) | |
160 | goto err; | |
161 | ||
162 | switch (selector) { | |
163 | case 0x00: | |
164 | return 4200000; | |
165 | case 0x01 ... 0x0E: | |
166 | return 4000000 + 20000 * (selector - 0x01); | |
167 | case 0x0F: | |
168 | return 4350000; | |
169 | default: | |
170 | return -EINVAL; | |
171 | } | |
172 | err: | |
173 | return -EINVAL; | |
174 | } | |
175 | ||
176 | static int max8997_list_voltage(struct regulator_dev *rdev, | |
177 | unsigned int selector) | |
178 | { | |
179 | const struct voltage_map_desc *desc; | |
b3e1348e | 180 | int rid = rdev_get_id(rdev); |
bd6ca2cf MH |
181 | int val; |
182 | ||
183 | if (rid >= ARRAY_SIZE(reg_voltage_map) || | |
184 | rid < 0) | |
185 | return -EINVAL; | |
186 | ||
187 | desc = reg_voltage_map[rid]; | |
188 | if (desc == NULL) | |
189 | return -EINVAL; | |
190 | ||
191 | val = desc->min + desc->step * selector; | |
192 | if (val > desc->max) | |
193 | return -EINVAL; | |
194 | ||
195 | return val * 1000; | |
196 | } | |
197 | ||
198 | static int max8997_get_enable_register(struct regulator_dev *rdev, | |
199 | int *reg, int *mask, int *pattern) | |
200 | { | |
b3e1348e | 201 | int rid = rdev_get_id(rdev); |
bd6ca2cf MH |
202 | |
203 | switch (rid) { | |
204 | case MAX8997_LDO1 ... MAX8997_LDO21: | |
205 | *reg = MAX8997_REG_LDO1CTRL + (rid - MAX8997_LDO1); | |
206 | *mask = 0xC0; | |
207 | *pattern = 0xC0; | |
208 | break; | |
209 | case MAX8997_BUCK1: | |
210 | *reg = MAX8997_REG_BUCK1CTRL; | |
211 | *mask = 0x01; | |
212 | *pattern = 0x01; | |
213 | break; | |
214 | case MAX8997_BUCK2: | |
215 | *reg = MAX8997_REG_BUCK2CTRL; | |
216 | *mask = 0x01; | |
217 | *pattern = 0x01; | |
218 | break; | |
219 | case MAX8997_BUCK3: | |
220 | *reg = MAX8997_REG_BUCK3CTRL; | |
221 | *mask = 0x01; | |
222 | *pattern = 0x01; | |
223 | break; | |
224 | case MAX8997_BUCK4: | |
225 | *reg = MAX8997_REG_BUCK4CTRL; | |
226 | *mask = 0x01; | |
227 | *pattern = 0x01; | |
228 | break; | |
229 | case MAX8997_BUCK5: | |
230 | *reg = MAX8997_REG_BUCK5CTRL; | |
231 | *mask = 0x01; | |
232 | *pattern = 0x01; | |
233 | break; | |
234 | case MAX8997_BUCK6: | |
235 | *reg = MAX8997_REG_BUCK6CTRL; | |
236 | *mask = 0x01; | |
237 | *pattern = 0x01; | |
238 | break; | |
239 | case MAX8997_BUCK7: | |
240 | *reg = MAX8997_REG_BUCK7CTRL; | |
241 | *mask = 0x01; | |
242 | *pattern = 0x01; | |
243 | break; | |
244 | case MAX8997_EN32KHZ_AP ... MAX8997_EN32KHZ_CP: | |
245 | *reg = MAX8997_REG_MAINCON1; | |
246 | *mask = 0x01 << (rid - MAX8997_EN32KHZ_AP); | |
247 | *pattern = 0x01 << (rid - MAX8997_EN32KHZ_AP); | |
248 | break; | |
249 | case MAX8997_ENVICHG: | |
250 | *reg = MAX8997_REG_MBCCTRL1; | |
251 | *mask = 0x80; | |
252 | *pattern = 0x80; | |
253 | break; | |
254 | case MAX8997_ESAFEOUT1 ... MAX8997_ESAFEOUT2: | |
255 | *reg = MAX8997_REG_SAFEOUTCTRL; | |
256 | *mask = 0x40 << (rid - MAX8997_ESAFEOUT1); | |
257 | *pattern = 0x40 << (rid - MAX8997_ESAFEOUT1); | |
258 | break; | |
259 | case MAX8997_CHARGER: | |
260 | *reg = MAX8997_REG_MBCCTRL2; | |
261 | *mask = 0x40; | |
262 | *pattern = 0x40; | |
263 | break; | |
264 | default: | |
265 | /* Not controllable or not exists */ | |
266 | return -EINVAL; | |
bd6ca2cf MH |
267 | } |
268 | ||
269 | return 0; | |
270 | } | |
271 | ||
272 | static int max8997_reg_is_enabled(struct regulator_dev *rdev) | |
273 | { | |
274 | struct max8997_data *max8997 = rdev_get_drvdata(rdev); | |
275 | struct i2c_client *i2c = max8997->iodev->i2c; | |
276 | int ret, reg, mask, pattern; | |
277 | u8 val; | |
278 | ||
279 | ret = max8997_get_enable_register(rdev, ®, &mask, &pattern); | |
c245c087 | 280 | if (ret) |
bd6ca2cf MH |
281 | return ret; |
282 | ||
283 | ret = max8997_read_reg(i2c, reg, &val); | |
284 | if (ret) | |
285 | return ret; | |
286 | ||
287 | return (val & mask) == pattern; | |
288 | } | |
289 | ||
290 | static int max8997_reg_enable(struct regulator_dev *rdev) | |
291 | { | |
292 | struct max8997_data *max8997 = rdev_get_drvdata(rdev); | |
293 | struct i2c_client *i2c = max8997->iodev->i2c; | |
294 | int ret, reg, mask, pattern; | |
295 | ||
296 | ret = max8997_get_enable_register(rdev, ®, &mask, &pattern); | |
297 | if (ret) | |
298 | return ret; | |
299 | ||
300 | return max8997_update_reg(i2c, reg, pattern, mask); | |
301 | } | |
302 | ||
303 | static int max8997_reg_disable(struct regulator_dev *rdev) | |
304 | { | |
305 | struct max8997_data *max8997 = rdev_get_drvdata(rdev); | |
306 | struct i2c_client *i2c = max8997->iodev->i2c; | |
307 | int ret, reg, mask, pattern; | |
308 | ||
309 | ret = max8997_get_enable_register(rdev, ®, &mask, &pattern); | |
310 | if (ret) | |
311 | return ret; | |
312 | ||
313 | return max8997_update_reg(i2c, reg, ~pattern, mask); | |
314 | } | |
315 | ||
316 | static int max8997_get_voltage_register(struct regulator_dev *rdev, | |
317 | int *_reg, int *_shift, int *_mask) | |
318 | { | |
6f43c380 | 319 | struct max8997_data *max8997 = rdev_get_drvdata(rdev); |
b3e1348e | 320 | int rid = rdev_get_id(rdev); |
bd6ca2cf MH |
321 | int reg, shift = 0, mask = 0x3f; |
322 | ||
323 | switch (rid) { | |
324 | case MAX8997_LDO1 ... MAX8997_LDO21: | |
325 | reg = MAX8997_REG_LDO1CTRL + (rid - MAX8997_LDO1); | |
326 | break; | |
327 | case MAX8997_BUCK1: | |
328 | reg = MAX8997_REG_BUCK1DVS1; | |
6f43c380 AL |
329 | if (max8997->buck1_gpiodvs) |
330 | reg += max8997->buck125_gpioindex; | |
bd6ca2cf MH |
331 | break; |
332 | case MAX8997_BUCK2: | |
333 | reg = MAX8997_REG_BUCK2DVS1; | |
6f43c380 AL |
334 | if (max8997->buck2_gpiodvs) |
335 | reg += max8997->buck125_gpioindex; | |
bd6ca2cf MH |
336 | break; |
337 | case MAX8997_BUCK3: | |
338 | reg = MAX8997_REG_BUCK3DVS; | |
339 | break; | |
340 | case MAX8997_BUCK4: | |
341 | reg = MAX8997_REG_BUCK4DVS; | |
342 | break; | |
343 | case MAX8997_BUCK5: | |
344 | reg = MAX8997_REG_BUCK5DVS1; | |
6f43c380 AL |
345 | if (max8997->buck5_gpiodvs) |
346 | reg += max8997->buck125_gpioindex; | |
bd6ca2cf MH |
347 | break; |
348 | case MAX8997_BUCK7: | |
349 | reg = MAX8997_REG_BUCK7DVS; | |
350 | break; | |
351 | case MAX8997_ESAFEOUT1 ... MAX8997_ESAFEOUT2: | |
352 | reg = MAX8997_REG_SAFEOUTCTRL; | |
353 | shift = (rid == MAX8997_ESAFEOUT2) ? 2 : 0; | |
354 | mask = 0x3; | |
355 | break; | |
356 | case MAX8997_CHARGER_CV: | |
357 | reg = MAX8997_REG_MBCCTRL3; | |
358 | shift = 0; | |
359 | mask = 0xf; | |
360 | break; | |
361 | case MAX8997_CHARGER: | |
362 | reg = MAX8997_REG_MBCCTRL4; | |
363 | shift = 0; | |
364 | mask = 0xf; | |
365 | break; | |
366 | case MAX8997_CHARGER_TOPOFF: | |
367 | reg = MAX8997_REG_MBCCTRL5; | |
368 | shift = 0; | |
369 | mask = 0xf; | |
370 | break; | |
371 | default: | |
372 | return -EINVAL; | |
373 | } | |
374 | ||
375 | *_reg = reg; | |
376 | *_shift = shift; | |
377 | *_mask = mask; | |
378 | ||
379 | return 0; | |
380 | } | |
381 | ||
9e96b3a7 | 382 | static int max8997_get_voltage_sel(struct regulator_dev *rdev) |
bd6ca2cf MH |
383 | { |
384 | struct max8997_data *max8997 = rdev_get_drvdata(rdev); | |
bd6ca2cf MH |
385 | struct i2c_client *i2c = max8997->iodev->i2c; |
386 | int reg, shift, mask, ret; | |
bd6ca2cf MH |
387 | u8 val; |
388 | ||
389 | ret = max8997_get_voltage_register(rdev, ®, &shift, &mask); | |
390 | if (ret) | |
391 | return ret; | |
392 | ||
bd6ca2cf MH |
393 | ret = max8997_read_reg(i2c, reg, &val); |
394 | if (ret) | |
395 | return ret; | |
396 | ||
397 | val >>= shift; | |
398 | val &= mask; | |
399 | ||
9e96b3a7 | 400 | return val; |
bd6ca2cf MH |
401 | } |
402 | ||
403 | static inline int max8997_get_voltage_proper_val( | |
404 | const struct voltage_map_desc *desc, | |
405 | int min_vol, int max_vol) | |
406 | { | |
2358b776 | 407 | int i; |
bd6ca2cf MH |
408 | |
409 | if (desc == NULL) | |
410 | return -EINVAL; | |
411 | ||
412 | if (max_vol < desc->min || min_vol > desc->max) | |
413 | return -EINVAL; | |
414 | ||
2358b776 AL |
415 | if (min_vol < desc->min) |
416 | min_vol = desc->min; | |
bd6ca2cf | 417 | |
2358b776 | 418 | i = DIV_ROUND_UP(min_vol - desc->min, desc->step); |
bd6ca2cf | 419 | |
bd6ca2cf | 420 | if (desc->min + desc->step * i > max_vol) |
bd6ca2cf MH |
421 | return -EINVAL; |
422 | ||
423 | return i; | |
424 | } | |
425 | ||
426 | static int max8997_set_voltage_charger_cv(struct regulator_dev *rdev, | |
427 | int min_uV, int max_uV, unsigned *selector) | |
428 | { | |
429 | struct max8997_data *max8997 = rdev_get_drvdata(rdev); | |
430 | struct i2c_client *i2c = max8997->iodev->i2c; | |
b3e1348e | 431 | int rid = rdev_get_id(rdev); |
bd6ca2cf MH |
432 | int lb, ub; |
433 | int reg, shift = 0, mask, ret = 0; | |
434 | u8 val = 0x0; | |
435 | ||
436 | if (rid != MAX8997_CHARGER_CV) | |
437 | return -EINVAL; | |
438 | ||
439 | ret = max8997_get_voltage_register(rdev, ®, &shift, &mask); | |
440 | if (ret) | |
441 | return ret; | |
442 | ||
443 | if (max_uV < 4000000 || min_uV > 4350000) | |
444 | return -EINVAL; | |
445 | ||
446 | if (min_uV <= 4000000) { | |
447 | if (max_uV >= 4000000) | |
448 | return -EINVAL; | |
449 | else | |
450 | val = 0x1; | |
451 | } else if (min_uV <= 4200000 && max_uV >= 4200000) | |
452 | val = 0x0; | |
453 | else { | |
454 | lb = (min_uV - 4000001) / 20000 + 2; | |
455 | ub = (max_uV - 4000000) / 20000 + 1; | |
456 | ||
457 | if (lb > ub) | |
458 | return -EINVAL; | |
459 | ||
460 | if (lb < 0xf) | |
461 | val = lb; | |
462 | else { | |
463 | if (ub >= 0xf) | |
464 | val = 0xf; | |
465 | else | |
466 | return -EINVAL; | |
467 | } | |
468 | } | |
469 | ||
470 | *selector = val; | |
471 | ||
472 | ret = max8997_update_reg(i2c, reg, val << shift, mask); | |
473 | ||
474 | return ret; | |
475 | } | |
476 | ||
477 | /* | |
478 | * For LDO1 ~ LDO21, BUCK1~5, BUCK7, CHARGER, CHARGER_TOPOFF | |
479 | * BUCK1, 2, and 5 are available if they are not controlled by gpio | |
480 | */ | |
481 | static int max8997_set_voltage_ldobuck(struct regulator_dev *rdev, | |
482 | int min_uV, int max_uV, unsigned *selector) | |
483 | { | |
484 | struct max8997_data *max8997 = rdev_get_drvdata(rdev); | |
485 | struct i2c_client *i2c = max8997->iodev->i2c; | |
486 | int min_vol = min_uV / 1000, max_vol = max_uV / 1000; | |
487 | const struct voltage_map_desc *desc; | |
b3e1348e | 488 | int rid = rdev_get_id(rdev); |
62bc4d4a | 489 | int i, reg, shift, mask, ret; |
bd6ca2cf MH |
490 | |
491 | switch (rid) { | |
492 | case MAX8997_LDO1 ... MAX8997_LDO21: | |
493 | break; | |
494 | case MAX8997_BUCK1 ... MAX8997_BUCK5: | |
495 | break; | |
496 | case MAX8997_BUCK6: | |
497 | return -EINVAL; | |
498 | case MAX8997_BUCK7: | |
499 | break; | |
500 | case MAX8997_CHARGER: | |
501 | break; | |
502 | case MAX8997_CHARGER_TOPOFF: | |
503 | break; | |
504 | default: | |
505 | return -EINVAL; | |
506 | } | |
507 | ||
508 | desc = reg_voltage_map[rid]; | |
509 | ||
510 | i = max8997_get_voltage_proper_val(desc, min_vol, max_vol); | |
511 | if (i < 0) | |
512 | return i; | |
513 | ||
514 | ret = max8997_get_voltage_register(rdev, ®, &shift, &mask); | |
515 | if (ret) | |
516 | return ret; | |
517 | ||
bd6ca2cf MH |
518 | ret = max8997_update_reg(i2c, reg, i << shift, mask << shift); |
519 | *selector = i; | |
520 | ||
62bc4d4a AL |
521 | return ret; |
522 | } | |
523 | ||
524 | static int max8997_set_voltage_ldobuck_time_sel(struct regulator_dev *rdev, | |
525 | unsigned int old_selector, | |
526 | unsigned int new_selector) | |
527 | { | |
528 | struct max8997_data *max8997 = rdev_get_drvdata(rdev); | |
529 | int rid = rdev_get_id(rdev); | |
530 | const struct voltage_map_desc *desc = reg_voltage_map[rid]; | |
531 | ||
532 | /* Delay is required only if the voltage is increasing */ | |
533 | if (old_selector >= new_selector) | |
534 | return 0; | |
535 | ||
536 | /* No need to delay if gpio_dvs_mode */ | |
537 | switch (rid) { | |
538 | case MAX8997_BUCK1: | |
539 | if (max8997->buck1_gpiodvs) | |
540 | return 0; | |
541 | break; | |
542 | case MAX8997_BUCK2: | |
543 | if (max8997->buck2_gpiodvs) | |
544 | return 0; | |
545 | break; | |
546 | case MAX8997_BUCK5: | |
547 | if (max8997->buck5_gpiodvs) | |
548 | return 0; | |
549 | break; | |
bd6ca2cf MH |
550 | } |
551 | ||
62bc4d4a AL |
552 | switch (rid) { |
553 | case MAX8997_BUCK1: | |
554 | case MAX8997_BUCK2: | |
555 | case MAX8997_BUCK4: | |
556 | case MAX8997_BUCK5: | |
557 | return DIV_ROUND_UP(desc->step * (new_selector - old_selector), | |
558 | max8997->ramp_delay); | |
bd6ca2cf MH |
559 | } |
560 | ||
62bc4d4a | 561 | return 0; |
bd6ca2cf MH |
562 | } |
563 | ||
564 | /* | |
565 | * Assess the damage on the voltage setting of BUCK1,2,5 by the change. | |
566 | * | |
567 | * When GPIO-DVS mode is used for multiple bucks, changing the voltage value | |
568 | * of one of the bucks may affect that of another buck, which is the side | |
569 | * effect of the change (set_voltage). This function examines the GPIO-DVS | |
570 | * configurations and checks whether such side-effect exists. | |
571 | */ | |
572 | static int max8997_assess_side_effect(struct regulator_dev *rdev, | |
573 | u8 new_val, int *best) | |
574 | { | |
575 | struct max8997_data *max8997 = rdev_get_drvdata(rdev); | |
b3e1348e | 576 | int rid = rdev_get_id(rdev); |
bd6ca2cf MH |
577 | u8 *buckx_val[3]; |
578 | bool buckx_gpiodvs[3]; | |
579 | int side_effect[8]; | |
580 | int min_side_effect = INT_MAX; | |
581 | int i; | |
582 | ||
583 | *best = -1; | |
584 | ||
585 | switch (rid) { | |
586 | case MAX8997_BUCK1: | |
587 | rid = 0; | |
588 | break; | |
589 | case MAX8997_BUCK2: | |
590 | rid = 1; | |
591 | break; | |
592 | case MAX8997_BUCK5: | |
593 | rid = 2; | |
594 | break; | |
595 | default: | |
596 | return -EINVAL; | |
597 | } | |
598 | ||
599 | buckx_val[0] = max8997->buck1_vol; | |
600 | buckx_val[1] = max8997->buck2_vol; | |
601 | buckx_val[2] = max8997->buck5_vol; | |
6e0414a5 MH |
602 | buckx_gpiodvs[0] = max8997->buck1_gpiodvs; |
603 | buckx_gpiodvs[1] = max8997->buck2_gpiodvs; | |
604 | buckx_gpiodvs[2] = max8997->buck5_gpiodvs; | |
bd6ca2cf MH |
605 | |
606 | for (i = 0; i < 8; i++) { | |
607 | int others; | |
608 | ||
609 | if (new_val != (buckx_val[rid])[i]) { | |
610 | side_effect[i] = -1; | |
611 | continue; | |
612 | } | |
613 | ||
614 | side_effect[i] = 0; | |
615 | for (others = 0; others < 3; others++) { | |
616 | int diff; | |
617 | ||
618 | if (others == rid) | |
619 | continue; | |
620 | if (buckx_gpiodvs[others] == false) | |
621 | continue; /* Not affected */ | |
622 | diff = (buckx_val[others])[i] - | |
623 | (buckx_val[others])[max8997->buck125_gpioindex]; | |
624 | if (diff > 0) | |
625 | side_effect[i] += diff; | |
626 | else if (diff < 0) | |
627 | side_effect[i] -= diff; | |
628 | } | |
629 | if (side_effect[i] == 0) { | |
630 | *best = i; | |
631 | return 0; /* NO SIDE EFFECT! Use This! */ | |
632 | } | |
633 | if (side_effect[i] < min_side_effect) { | |
634 | min_side_effect = side_effect[i]; | |
635 | *best = i; | |
636 | } | |
637 | } | |
638 | ||
639 | if (*best == -1) | |
640 | return -EINVAL; | |
641 | ||
642 | return side_effect[*best]; | |
643 | } | |
644 | ||
645 | /* | |
646 | * For Buck 1 ~ 5 and 7. If it is not controlled by GPIO, this calls | |
647 | * max8997_set_voltage_ldobuck to do the job. | |
648 | */ | |
649 | static int max8997_set_voltage_buck(struct regulator_dev *rdev, | |
650 | int min_uV, int max_uV, unsigned *selector) | |
651 | { | |
652 | struct max8997_data *max8997 = rdev_get_drvdata(rdev); | |
b3e1348e | 653 | int rid = rdev_get_id(rdev); |
bd6ca2cf MH |
654 | const struct voltage_map_desc *desc; |
655 | int new_val, new_idx, damage, tmp_val, tmp_idx, tmp_dmg; | |
656 | bool gpio_dvs_mode = false; | |
657 | int min_vol = min_uV / 1000, max_vol = max_uV / 1000; | |
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]; | |
682 | new_val = max8997_get_voltage_proper_val(desc, min_vol, max_vol); | |
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 | ||
936 | static __devinit int max8997_pmic_probe(struct platform_device *pdev) | |
937 | { | |
938 | struct max8997_dev *iodev = dev_get_drvdata(pdev->dev.parent); | |
939 | struct max8997_platform_data *pdata = dev_get_platdata(iodev->dev); | |
c172708d | 940 | struct regulator_config config = { }; |
bd6ca2cf MH |
941 | struct regulator_dev **rdev; |
942 | struct max8997_data *max8997; | |
943 | struct i2c_client *i2c; | |
944 | int i, ret, size; | |
945 | u8 max_buck1 = 0, max_buck2 = 0, max_buck5 = 0; | |
946 | ||
947 | if (!pdata) { | |
948 | dev_err(pdev->dev.parent, "No platform init data supplied.\n"); | |
949 | return -ENODEV; | |
950 | } | |
951 | ||
8ae5767b AL |
952 | max8997 = devm_kzalloc(&pdev->dev, sizeof(struct max8997_data), |
953 | GFP_KERNEL); | |
bd6ca2cf MH |
954 | if (!max8997) |
955 | return -ENOMEM; | |
956 | ||
957 | size = sizeof(struct regulator_dev *) * pdata->num_regulators; | |
8ae5767b AL |
958 | max8997->rdev = devm_kzalloc(&pdev->dev, size, GFP_KERNEL); |
959 | if (!max8997->rdev) | |
bd6ca2cf | 960 | return -ENOMEM; |
bd6ca2cf MH |
961 | |
962 | rdev = max8997->rdev; | |
963 | max8997->dev = &pdev->dev; | |
964 | max8997->iodev = iodev; | |
965 | max8997->num_regulators = pdata->num_regulators; | |
966 | platform_set_drvdata(pdev, max8997); | |
967 | i2c = max8997->iodev->i2c; | |
968 | ||
969 | max8997->buck125_gpioindex = pdata->buck125_default_idx; | |
6e0414a5 MH |
970 | max8997->buck1_gpiodvs = pdata->buck1_gpiodvs; |
971 | max8997->buck2_gpiodvs = pdata->buck2_gpiodvs; | |
972 | max8997->buck5_gpiodvs = pdata->buck5_gpiodvs; | |
973 | memcpy(max8997->buck125_gpios, pdata->buck125_gpios, sizeof(int) * 3); | |
974 | max8997->ignore_gpiodvs_side_effect = pdata->ignore_gpiodvs_side_effect; | |
bd6ca2cf MH |
975 | |
976 | for (i = 0; i < 8; i++) { | |
977 | max8997->buck1_vol[i] = ret = | |
978 | max8997_get_voltage_proper_val( | |
979 | &buck1245_voltage_map_desc, | |
980 | pdata->buck1_voltage[i] / 1000, | |
981 | pdata->buck1_voltage[i] / 1000 + | |
982 | buck1245_voltage_map_desc.step); | |
983 | if (ret < 0) | |
8ae5767b | 984 | goto err_out; |
bd6ca2cf MH |
985 | |
986 | max8997->buck2_vol[i] = ret = | |
987 | max8997_get_voltage_proper_val( | |
988 | &buck1245_voltage_map_desc, | |
989 | pdata->buck2_voltage[i] / 1000, | |
990 | pdata->buck2_voltage[i] / 1000 + | |
991 | buck1245_voltage_map_desc.step); | |
992 | if (ret < 0) | |
8ae5767b | 993 | goto err_out; |
bd6ca2cf MH |
994 | |
995 | max8997->buck5_vol[i] = ret = | |
996 | max8997_get_voltage_proper_val( | |
997 | &buck1245_voltage_map_desc, | |
998 | pdata->buck5_voltage[i] / 1000, | |
999 | pdata->buck5_voltage[i] / 1000 + | |
1000 | buck1245_voltage_map_desc.step); | |
1001 | if (ret < 0) | |
8ae5767b | 1002 | goto err_out; |
bd6ca2cf MH |
1003 | |
1004 | if (max_buck1 < max8997->buck1_vol[i]) | |
1005 | max_buck1 = max8997->buck1_vol[i]; | |
1006 | if (max_buck2 < max8997->buck2_vol[i]) | |
1007 | max_buck2 = max8997->buck2_vol[i]; | |
1008 | if (max_buck5 < max8997->buck5_vol[i]) | |
1009 | max_buck5 = max8997->buck5_vol[i]; | |
1010 | } | |
1011 | ||
1012 | /* For the safety, set max voltage before setting up */ | |
1013 | for (i = 0; i < 8; i++) { | |
ecb9c4f5 | 1014 | max8997_update_reg(i2c, MAX8997_REG_BUCK1DVS1 + i, |
bd6ca2cf | 1015 | max_buck1, 0x3f); |
ecb9c4f5 | 1016 | max8997_update_reg(i2c, MAX8997_REG_BUCK2DVS1 + i, |
bd6ca2cf | 1017 | max_buck2, 0x3f); |
ecb9c4f5 | 1018 | max8997_update_reg(i2c, MAX8997_REG_BUCK5DVS1 + i, |
bd6ca2cf MH |
1019 | max_buck5, 0x3f); |
1020 | } | |
1021 | ||
1022 | /* | |
1023 | * If buck 1, 2, and 5 do not care DVS GPIO settings, ignore them. | |
1024 | * If at least one of them cares, set gpios. | |
1025 | */ | |
1026 | if (pdata->buck1_gpiodvs || pdata->buck2_gpiodvs || | |
1027 | pdata->buck5_gpiodvs) { | |
bd6ca2cf MH |
1028 | |
1029 | if (!gpio_is_valid(pdata->buck125_gpios[0]) || | |
1030 | !gpio_is_valid(pdata->buck125_gpios[1]) || | |
1031 | !gpio_is_valid(pdata->buck125_gpios[2])) { | |
1032 | dev_err(&pdev->dev, "GPIO NOT VALID\n"); | |
1033 | ret = -EINVAL; | |
8ae5767b | 1034 | goto err_out; |
bd6ca2cf MH |
1035 | } |
1036 | ||
8fa25eda AL |
1037 | ret = devm_gpio_request(&pdev->dev, pdata->buck125_gpios[0], |
1038 | "MAX8997 SET1"); | |
1039 | if (ret) | |
8ae5767b | 1040 | goto err_out; |
8fa25eda AL |
1041 | |
1042 | ret = devm_gpio_request(&pdev->dev, pdata->buck125_gpios[1], | |
1043 | "MAX8997 SET2"); | |
1044 | if (ret) | |
8ae5767b | 1045 | goto err_out; |
bd6ca2cf | 1046 | |
8fa25eda | 1047 | ret = devm_gpio_request(&pdev->dev, pdata->buck125_gpios[2], |
bd6ca2cf | 1048 | "MAX8997 SET3"); |
8fa25eda | 1049 | if (ret) |
8ae5767b | 1050 | goto err_out; |
bd6ca2cf MH |
1051 | |
1052 | gpio_direction_output(pdata->buck125_gpios[0], | |
1053 | (max8997->buck125_gpioindex >> 2) | |
1054 | & 0x1); /* SET1 */ | |
1055 | gpio_direction_output(pdata->buck125_gpios[1], | |
1056 | (max8997->buck125_gpioindex >> 1) | |
1057 | & 0x1); /* SET2 */ | |
1058 | gpio_direction_output(pdata->buck125_gpios[2], | |
1059 | (max8997->buck125_gpioindex >> 0) | |
1060 | & 0x1); /* SET3 */ | |
bd6ca2cf MH |
1061 | } |
1062 | ||
1063 | /* DVS-GPIO disabled */ | |
1064 | max8997_update_reg(i2c, MAX8997_REG_BUCK1CTRL, (pdata->buck1_gpiodvs) ? | |
1065 | (1 << 1) : (0 << 1), 1 << 1); | |
1066 | max8997_update_reg(i2c, MAX8997_REG_BUCK2CTRL, (pdata->buck2_gpiodvs) ? | |
1067 | (1 << 1) : (0 << 1), 1 << 1); | |
1068 | max8997_update_reg(i2c, MAX8997_REG_BUCK5CTRL, (pdata->buck5_gpiodvs) ? | |
1069 | (1 << 1) : (0 << 1), 1 << 1); | |
1070 | ||
1071 | /* Initialize all the DVS related BUCK registers */ | |
1072 | for (i = 0; i < 8; i++) { | |
ecb9c4f5 | 1073 | max8997_update_reg(i2c, MAX8997_REG_BUCK1DVS1 + i, |
bd6ca2cf MH |
1074 | max8997->buck1_vol[i], |
1075 | 0x3f); | |
ecb9c4f5 | 1076 | max8997_update_reg(i2c, MAX8997_REG_BUCK2DVS1 + i, |
bd6ca2cf MH |
1077 | max8997->buck2_vol[i], |
1078 | 0x3f); | |
ecb9c4f5 | 1079 | max8997_update_reg(i2c, MAX8997_REG_BUCK5DVS1 + i, |
bd6ca2cf MH |
1080 | max8997->buck5_vol[i], |
1081 | 0x3f); | |
1082 | } | |
1083 | ||
dbb48e7c TB |
1084 | /* Misc Settings */ |
1085 | max8997->ramp_delay = 10; /* set 10mV/us, which is the default */ | |
1086 | max8997_write_reg(i2c, MAX8997_REG_BUCKRAMP, (0xf << 4) | 0x9); | |
1087 | ||
bd6ca2cf MH |
1088 | for (i = 0; i < pdata->num_regulators; i++) { |
1089 | const struct voltage_map_desc *desc; | |
1090 | int id = pdata->regulators[i].id; | |
1091 | ||
1092 | desc = reg_voltage_map[id]; | |
1093 | if (desc) | |
1094 | regulators[id].n_voltages = | |
1095 | (desc->max - desc->min) / desc->step + 1; | |
1096 | else if (id == MAX8997_ESAFEOUT1 || id == MAX8997_ESAFEOUT2) | |
1097 | regulators[id].n_voltages = 4; | |
1098 | else if (id == MAX8997_CHARGER_CV) | |
1099 | regulators[id].n_voltages = 16; | |
1100 | ||
c172708d MB |
1101 | config.dev = max8997->dev; |
1102 | config.init_data = pdata->regulators[i].initdata; | |
1103 | config.driver_data = max8997; | |
1104 | ||
1105 | rdev[i] = regulator_register(®ulators[id], &config); | |
bd6ca2cf MH |
1106 | if (IS_ERR(rdev[i])) { |
1107 | ret = PTR_ERR(rdev[i]); | |
1108 | dev_err(max8997->dev, "regulator init failed for %d\n", | |
1109 | id); | |
1110 | rdev[i] = NULL; | |
1111 | goto err; | |
1112 | } | |
1113 | } | |
1114 | ||
bd6ca2cf MH |
1115 | return 0; |
1116 | err: | |
8ae5767b AL |
1117 | while (--i >= 0) |
1118 | regulator_unregister(rdev[i]); | |
1119 | err_out: | |
bd6ca2cf MH |
1120 | return ret; |
1121 | } | |
1122 | ||
1123 | static int __devexit max8997_pmic_remove(struct platform_device *pdev) | |
1124 | { | |
1125 | struct max8997_data *max8997 = platform_get_drvdata(pdev); | |
1126 | struct regulator_dev **rdev = max8997->rdev; | |
1127 | int i; | |
1128 | ||
1129 | for (i = 0; i < max8997->num_regulators; i++) | |
8ae5767b | 1130 | regulator_unregister(rdev[i]); |
bd6ca2cf MH |
1131 | return 0; |
1132 | } | |
1133 | ||
1134 | static const struct platform_device_id max8997_pmic_id[] = { | |
1135 | { "max8997-pmic", 0}, | |
1136 | { }, | |
1137 | }; | |
a51b907b | 1138 | MODULE_DEVICE_TABLE(platform, max8997_pmic_id); |
bd6ca2cf MH |
1139 | |
1140 | static struct platform_driver max8997_pmic_driver = { | |
1141 | .driver = { | |
1142 | .name = "max8997-pmic", | |
1143 | .owner = THIS_MODULE, | |
1144 | }, | |
1145 | .probe = max8997_pmic_probe, | |
1146 | .remove = __devexit_p(max8997_pmic_remove), | |
1147 | .id_table = max8997_pmic_id, | |
1148 | }; | |
1149 | ||
1150 | static int __init max8997_pmic_init(void) | |
1151 | { | |
1152 | return platform_driver_register(&max8997_pmic_driver); | |
1153 | } | |
1154 | subsys_initcall(max8997_pmic_init); | |
1155 | ||
1156 | static void __exit max8997_pmic_cleanup(void) | |
1157 | { | |
1158 | platform_driver_unregister(&max8997_pmic_driver); | |
1159 | } | |
1160 | module_exit(max8997_pmic_cleanup); | |
1161 | ||
1162 | MODULE_DESCRIPTION("MAXIM 8997/8966 Regulator Driver"); | |
1163 | MODULE_AUTHOR("MyungJoo Ham <myungjoo.ham@samsung.com>"); | |
1164 | MODULE_LICENSE("GPL"); |