]>
Commit | Line | Data |
---|---|---|
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> | |
25 | #include <linux/delay.h> | |
26 | #include <linux/err.h> | |
27 | #include <linux/gpio.h> | |
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> | |
35 | ||
36 | struct max8997_data { | |
37 | struct device *dev; | |
38 | struct max8997_dev *iodev; | |
39 | int num_regulators; | |
40 | struct regulator_dev **rdev; | |
41 | int ramp_delay; /* in mV/us */ | |
42 | ||
6e0414a5 MH |
43 | bool buck1_gpiodvs; |
44 | bool buck2_gpiodvs; | |
45 | bool buck5_gpiodvs; | |
bd6ca2cf MH |
46 | u8 buck1_vol[8]; |
47 | u8 buck2_vol[8]; | |
48 | u8 buck5_vol[8]; | |
6e0414a5 | 49 | int buck125_gpios[3]; |
bd6ca2cf | 50 | int buck125_gpioindex; |
6e0414a5 | 51 | bool ignore_gpiodvs_side_effect; |
bd6ca2cf MH |
52 | |
53 | u8 saved_states[MAX8997_REG_MAX]; | |
54 | }; | |
55 | ||
56 | static inline void max8997_set_gpio(struct max8997_data *max8997) | |
57 | { | |
bd6ca2cf MH |
58 | int set3 = (max8997->buck125_gpioindex) & 0x1; |
59 | int set2 = ((max8997->buck125_gpioindex) >> 1) & 0x1; | |
60 | int set1 = ((max8997->buck125_gpioindex) >> 2) & 0x1; | |
61 | ||
6e0414a5 MH |
62 | gpio_set_value(max8997->buck125_gpios[0], set1); |
63 | gpio_set_value(max8997->buck125_gpios[1], set2); | |
64 | gpio_set_value(max8997->buck125_gpios[2], set3); | |
bd6ca2cf MH |
65 | } |
66 | ||
67 | struct voltage_map_desc { | |
68 | int min; | |
69 | int max; | |
70 | int step; | |
71 | unsigned int n_bits; | |
72 | }; | |
73 | ||
74 | /* Voltage maps in mV */ | |
75 | static const struct voltage_map_desc ldo_voltage_map_desc = { | |
76 | .min = 800, .max = 3950, .step = 50, .n_bits = 6, | |
77 | }; /* LDO1 ~ 18, 21 all */ | |
78 | ||
79 | static const struct voltage_map_desc buck1245_voltage_map_desc = { | |
80 | .min = 650, .max = 2225, .step = 25, .n_bits = 6, | |
81 | }; /* Buck1, 2, 4, 5 */ | |
82 | ||
83 | static const struct voltage_map_desc buck37_voltage_map_desc = { | |
84 | .min = 750, .max = 3900, .step = 50, .n_bits = 6, | |
85 | }; /* Buck3, 7 */ | |
86 | ||
87 | /* current map in mA */ | |
88 | static const struct voltage_map_desc charger_current_map_desc = { | |
89 | .min = 200, .max = 950, .step = 50, .n_bits = 4, | |
90 | }; | |
91 | ||
92 | static const struct voltage_map_desc topoff_current_map_desc = { | |
93 | .min = 50, .max = 200, .step = 10, .n_bits = 4, | |
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 | ||
197 | return val * 1000; | |
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); | |
282 | if (ret == -EINVAL) | |
283 | return 1; /* "not controllable" */ | |
284 | else if (ret) | |
285 | return ret; | |
286 | ||
287 | ret = max8997_read_reg(i2c, reg, &val); | |
288 | if (ret) | |
289 | return ret; | |
290 | ||
291 | return (val & mask) == pattern; | |
292 | } | |
293 | ||
294 | static int max8997_reg_enable(struct regulator_dev *rdev) | |
295 | { | |
296 | struct max8997_data *max8997 = rdev_get_drvdata(rdev); | |
297 | struct i2c_client *i2c = max8997->iodev->i2c; | |
298 | int ret, reg, mask, pattern; | |
299 | ||
300 | ret = max8997_get_enable_register(rdev, ®, &mask, &pattern); | |
301 | if (ret) | |
302 | return ret; | |
303 | ||
304 | return max8997_update_reg(i2c, reg, pattern, mask); | |
305 | } | |
306 | ||
307 | static int max8997_reg_disable(struct regulator_dev *rdev) | |
308 | { | |
309 | struct max8997_data *max8997 = rdev_get_drvdata(rdev); | |
310 | struct i2c_client *i2c = max8997->iodev->i2c; | |
311 | int ret, reg, mask, pattern; | |
312 | ||
313 | ret = max8997_get_enable_register(rdev, ®, &mask, &pattern); | |
314 | if (ret) | |
315 | return ret; | |
316 | ||
317 | return max8997_update_reg(i2c, reg, ~pattern, mask); | |
318 | } | |
319 | ||
320 | static int max8997_get_voltage_register(struct regulator_dev *rdev, | |
321 | int *_reg, int *_shift, int *_mask) | |
322 | { | |
b3e1348e | 323 | int rid = rdev_get_id(rdev); |
bd6ca2cf MH |
324 | int reg, shift = 0, mask = 0x3f; |
325 | ||
326 | switch (rid) { | |
327 | case MAX8997_LDO1 ... MAX8997_LDO21: | |
328 | reg = MAX8997_REG_LDO1CTRL + (rid - MAX8997_LDO1); | |
329 | break; | |
330 | case MAX8997_BUCK1: | |
331 | reg = MAX8997_REG_BUCK1DVS1; | |
332 | break; | |
333 | case MAX8997_BUCK2: | |
334 | reg = MAX8997_REG_BUCK2DVS1; | |
335 | break; | |
336 | case MAX8997_BUCK3: | |
337 | reg = MAX8997_REG_BUCK3DVS; | |
338 | break; | |
339 | case MAX8997_BUCK4: | |
340 | reg = MAX8997_REG_BUCK4DVS; | |
341 | break; | |
342 | case MAX8997_BUCK5: | |
343 | reg = MAX8997_REG_BUCK5DVS1; | |
344 | break; | |
345 | case MAX8997_BUCK7: | |
346 | reg = MAX8997_REG_BUCK7DVS; | |
347 | break; | |
348 | case MAX8997_ESAFEOUT1 ... MAX8997_ESAFEOUT2: | |
349 | reg = MAX8997_REG_SAFEOUTCTRL; | |
350 | shift = (rid == MAX8997_ESAFEOUT2) ? 2 : 0; | |
351 | mask = 0x3; | |
352 | break; | |
353 | case MAX8997_CHARGER_CV: | |
354 | reg = MAX8997_REG_MBCCTRL3; | |
355 | shift = 0; | |
356 | mask = 0xf; | |
357 | break; | |
358 | case MAX8997_CHARGER: | |
359 | reg = MAX8997_REG_MBCCTRL4; | |
360 | shift = 0; | |
361 | mask = 0xf; | |
362 | break; | |
363 | case MAX8997_CHARGER_TOPOFF: | |
364 | reg = MAX8997_REG_MBCCTRL5; | |
365 | shift = 0; | |
366 | mask = 0xf; | |
367 | break; | |
368 | default: | |
369 | return -EINVAL; | |
370 | } | |
371 | ||
372 | *_reg = reg; | |
373 | *_shift = shift; | |
374 | *_mask = mask; | |
375 | ||
376 | return 0; | |
377 | } | |
378 | ||
379 | static int max8997_get_voltage(struct regulator_dev *rdev) | |
380 | { | |
381 | struct max8997_data *max8997 = rdev_get_drvdata(rdev); | |
bd6ca2cf MH |
382 | struct i2c_client *i2c = max8997->iodev->i2c; |
383 | int reg, shift, mask, ret; | |
b3e1348e | 384 | int rid = rdev_get_id(rdev); |
bd6ca2cf MH |
385 | u8 val; |
386 | ||
387 | ret = max8997_get_voltage_register(rdev, ®, &shift, &mask); | |
388 | if (ret) | |
389 | return ret; | |
390 | ||
6e0414a5 MH |
391 | if ((rid == MAX8997_BUCK1 && max8997->buck1_gpiodvs) || |
392 | (rid == MAX8997_BUCK2 && max8997->buck2_gpiodvs) || | |
393 | (rid == MAX8997_BUCK5 && max8997->buck5_gpiodvs)) | |
bd6ca2cf MH |
394 | reg += max8997->buck125_gpioindex; |
395 | ||
396 | ret = max8997_read_reg(i2c, reg, &val); | |
397 | if (ret) | |
398 | return ret; | |
399 | ||
400 | val >>= shift; | |
401 | val &= mask; | |
402 | ||
403 | if (rdev->desc && rdev->desc->ops && rdev->desc->ops->list_voltage) | |
404 | return rdev->desc->ops->list_voltage(rdev, val); | |
405 | ||
406 | /* | |
407 | * max8997_list_voltage returns value for any rdev with voltage_map, | |
408 | * which works for "CHARGER" and "CHARGER TOPOFF" that do not have | |
409 | * list_voltage ops (they are current regulators). | |
410 | */ | |
411 | return max8997_list_voltage(rdev, val); | |
412 | } | |
413 | ||
414 | static inline int max8997_get_voltage_proper_val( | |
415 | const struct voltage_map_desc *desc, | |
416 | int min_vol, int max_vol) | |
417 | { | |
418 | int i = 0; | |
419 | ||
420 | if (desc == NULL) | |
421 | return -EINVAL; | |
422 | ||
423 | if (max_vol < desc->min || min_vol > desc->max) | |
424 | return -EINVAL; | |
425 | ||
426 | while (desc->min + desc->step * i < min_vol && | |
427 | desc->min + desc->step * i < desc->max) | |
428 | i++; | |
429 | ||
430 | if (desc->min + desc->step * i > max_vol) | |
431 | return -EINVAL; | |
432 | ||
433 | if (i >= (1 << desc->n_bits)) | |
434 | return -EINVAL; | |
435 | ||
436 | return i; | |
437 | } | |
438 | ||
439 | static int max8997_set_voltage_charger_cv(struct regulator_dev *rdev, | |
440 | int min_uV, int max_uV, unsigned *selector) | |
441 | { | |
442 | struct max8997_data *max8997 = rdev_get_drvdata(rdev); | |
443 | struct i2c_client *i2c = max8997->iodev->i2c; | |
b3e1348e | 444 | int rid = rdev_get_id(rdev); |
bd6ca2cf MH |
445 | int lb, ub; |
446 | int reg, shift = 0, mask, ret = 0; | |
447 | u8 val = 0x0; | |
448 | ||
449 | if (rid != MAX8997_CHARGER_CV) | |
450 | return -EINVAL; | |
451 | ||
452 | ret = max8997_get_voltage_register(rdev, ®, &shift, &mask); | |
453 | if (ret) | |
454 | return ret; | |
455 | ||
456 | if (max_uV < 4000000 || min_uV > 4350000) | |
457 | return -EINVAL; | |
458 | ||
459 | if (min_uV <= 4000000) { | |
460 | if (max_uV >= 4000000) | |
461 | return -EINVAL; | |
462 | else | |
463 | val = 0x1; | |
464 | } else if (min_uV <= 4200000 && max_uV >= 4200000) | |
465 | val = 0x0; | |
466 | else { | |
467 | lb = (min_uV - 4000001) / 20000 + 2; | |
468 | ub = (max_uV - 4000000) / 20000 + 1; | |
469 | ||
470 | if (lb > ub) | |
471 | return -EINVAL; | |
472 | ||
473 | if (lb < 0xf) | |
474 | val = lb; | |
475 | else { | |
476 | if (ub >= 0xf) | |
477 | val = 0xf; | |
478 | else | |
479 | return -EINVAL; | |
480 | } | |
481 | } | |
482 | ||
483 | *selector = val; | |
484 | ||
485 | ret = max8997_update_reg(i2c, reg, val << shift, mask); | |
486 | ||
487 | return ret; | |
488 | } | |
489 | ||
490 | /* | |
491 | * For LDO1 ~ LDO21, BUCK1~5, BUCK7, CHARGER, CHARGER_TOPOFF | |
492 | * BUCK1, 2, and 5 are available if they are not controlled by gpio | |
493 | */ | |
494 | static int max8997_set_voltage_ldobuck(struct regulator_dev *rdev, | |
495 | int min_uV, int max_uV, unsigned *selector) | |
496 | { | |
497 | struct max8997_data *max8997 = rdev_get_drvdata(rdev); | |
498 | struct i2c_client *i2c = max8997->iodev->i2c; | |
499 | int min_vol = min_uV / 1000, max_vol = max_uV / 1000; | |
500 | const struct voltage_map_desc *desc; | |
b3e1348e | 501 | int rid = rdev_get_id(rdev); |
bd6ca2cf MH |
502 | int reg, shift = 0, mask, ret; |
503 | int i; | |
504 | u8 org; | |
505 | ||
506 | switch (rid) { | |
507 | case MAX8997_LDO1 ... MAX8997_LDO21: | |
508 | break; | |
509 | case MAX8997_BUCK1 ... MAX8997_BUCK5: | |
510 | break; | |
511 | case MAX8997_BUCK6: | |
512 | return -EINVAL; | |
513 | case MAX8997_BUCK7: | |
514 | break; | |
515 | case MAX8997_CHARGER: | |
516 | break; | |
517 | case MAX8997_CHARGER_TOPOFF: | |
518 | break; | |
519 | default: | |
520 | return -EINVAL; | |
521 | } | |
522 | ||
523 | desc = reg_voltage_map[rid]; | |
524 | ||
525 | i = max8997_get_voltage_proper_val(desc, min_vol, max_vol); | |
526 | if (i < 0) | |
527 | return i; | |
528 | ||
529 | ret = max8997_get_voltage_register(rdev, ®, &shift, &mask); | |
530 | if (ret) | |
531 | return ret; | |
532 | ||
533 | max8997_read_reg(i2c, reg, &org); | |
534 | org = (org & mask) >> shift; | |
535 | ||
536 | ret = max8997_update_reg(i2c, reg, i << shift, mask << shift); | |
537 | *selector = i; | |
538 | ||
539 | if (rid == MAX8997_BUCK1 || rid == MAX8997_BUCK2 || | |
540 | rid == MAX8997_BUCK4 || rid == MAX8997_BUCK5) { | |
541 | /* If the voltage is increasing */ | |
542 | if (org < i) | |
6ff325a2 DK |
543 | udelay(DIV_ROUND_UP(desc->step * (i - org), |
544 | max8997->ramp_delay)); | |
bd6ca2cf MH |
545 | } |
546 | ||
547 | return ret; | |
548 | } | |
549 | ||
550 | /* | |
551 | * Assess the damage on the voltage setting of BUCK1,2,5 by the change. | |
552 | * | |
553 | * When GPIO-DVS mode is used for multiple bucks, changing the voltage value | |
554 | * of one of the bucks may affect that of another buck, which is the side | |
555 | * effect of the change (set_voltage). This function examines the GPIO-DVS | |
556 | * configurations and checks whether such side-effect exists. | |
557 | */ | |
558 | static int max8997_assess_side_effect(struct regulator_dev *rdev, | |
559 | u8 new_val, int *best) | |
560 | { | |
561 | struct max8997_data *max8997 = rdev_get_drvdata(rdev); | |
b3e1348e | 562 | int rid = rdev_get_id(rdev); |
bd6ca2cf MH |
563 | u8 *buckx_val[3]; |
564 | bool buckx_gpiodvs[3]; | |
565 | int side_effect[8]; | |
566 | int min_side_effect = INT_MAX; | |
567 | int i; | |
568 | ||
569 | *best = -1; | |
570 | ||
571 | switch (rid) { | |
572 | case MAX8997_BUCK1: | |
573 | rid = 0; | |
574 | break; | |
575 | case MAX8997_BUCK2: | |
576 | rid = 1; | |
577 | break; | |
578 | case MAX8997_BUCK5: | |
579 | rid = 2; | |
580 | break; | |
581 | default: | |
582 | return -EINVAL; | |
583 | } | |
584 | ||
585 | buckx_val[0] = max8997->buck1_vol; | |
586 | buckx_val[1] = max8997->buck2_vol; | |
587 | buckx_val[2] = max8997->buck5_vol; | |
6e0414a5 MH |
588 | buckx_gpiodvs[0] = max8997->buck1_gpiodvs; |
589 | buckx_gpiodvs[1] = max8997->buck2_gpiodvs; | |
590 | buckx_gpiodvs[2] = max8997->buck5_gpiodvs; | |
bd6ca2cf MH |
591 | |
592 | for (i = 0; i < 8; i++) { | |
593 | int others; | |
594 | ||
595 | if (new_val != (buckx_val[rid])[i]) { | |
596 | side_effect[i] = -1; | |
597 | continue; | |
598 | } | |
599 | ||
600 | side_effect[i] = 0; | |
601 | for (others = 0; others < 3; others++) { | |
602 | int diff; | |
603 | ||
604 | if (others == rid) | |
605 | continue; | |
606 | if (buckx_gpiodvs[others] == false) | |
607 | continue; /* Not affected */ | |
608 | diff = (buckx_val[others])[i] - | |
609 | (buckx_val[others])[max8997->buck125_gpioindex]; | |
610 | if (diff > 0) | |
611 | side_effect[i] += diff; | |
612 | else if (diff < 0) | |
613 | side_effect[i] -= diff; | |
614 | } | |
615 | if (side_effect[i] == 0) { | |
616 | *best = i; | |
617 | return 0; /* NO SIDE EFFECT! Use This! */ | |
618 | } | |
619 | if (side_effect[i] < min_side_effect) { | |
620 | min_side_effect = side_effect[i]; | |
621 | *best = i; | |
622 | } | |
623 | } | |
624 | ||
625 | if (*best == -1) | |
626 | return -EINVAL; | |
627 | ||
628 | return side_effect[*best]; | |
629 | } | |
630 | ||
631 | /* | |
632 | * For Buck 1 ~ 5 and 7. If it is not controlled by GPIO, this calls | |
633 | * max8997_set_voltage_ldobuck to do the job. | |
634 | */ | |
635 | static int max8997_set_voltage_buck(struct regulator_dev *rdev, | |
636 | int min_uV, int max_uV, unsigned *selector) | |
637 | { | |
638 | struct max8997_data *max8997 = rdev_get_drvdata(rdev); | |
b3e1348e | 639 | int rid = rdev_get_id(rdev); |
bd6ca2cf MH |
640 | const struct voltage_map_desc *desc; |
641 | int new_val, new_idx, damage, tmp_val, tmp_idx, tmp_dmg; | |
642 | bool gpio_dvs_mode = false; | |
643 | int min_vol = min_uV / 1000, max_vol = max_uV / 1000; | |
644 | ||
645 | if (rid < MAX8997_BUCK1 || rid > MAX8997_BUCK7) | |
646 | return -EINVAL; | |
647 | ||
648 | switch (rid) { | |
649 | case MAX8997_BUCK1: | |
6e0414a5 | 650 | if (max8997->buck1_gpiodvs) |
bd6ca2cf MH |
651 | gpio_dvs_mode = true; |
652 | break; | |
653 | case MAX8997_BUCK2: | |
6e0414a5 | 654 | if (max8997->buck2_gpiodvs) |
bd6ca2cf MH |
655 | gpio_dvs_mode = true; |
656 | break; | |
657 | case MAX8997_BUCK5: | |
6e0414a5 | 658 | if (max8997->buck5_gpiodvs) |
bd6ca2cf MH |
659 | gpio_dvs_mode = true; |
660 | break; | |
661 | } | |
662 | ||
663 | if (!gpio_dvs_mode) | |
664 | return max8997_set_voltage_ldobuck(rdev, min_uV, max_uV, | |
665 | selector); | |
666 | ||
667 | desc = reg_voltage_map[rid]; | |
668 | new_val = max8997_get_voltage_proper_val(desc, min_vol, max_vol); | |
669 | if (new_val < 0) | |
670 | return new_val; | |
671 | ||
672 | tmp_dmg = INT_MAX; | |
673 | tmp_idx = -1; | |
674 | tmp_val = -1; | |
675 | do { | |
676 | damage = max8997_assess_side_effect(rdev, new_val, &new_idx); | |
677 | if (damage == 0) | |
678 | goto out; | |
679 | ||
680 | if (tmp_dmg > damage) { | |
681 | tmp_idx = new_idx; | |
682 | tmp_val = new_val; | |
683 | tmp_dmg = damage; | |
684 | } | |
685 | ||
686 | new_val++; | |
687 | } while (desc->min + desc->step + new_val <= desc->max); | |
688 | ||
689 | new_idx = tmp_idx; | |
690 | new_val = tmp_val; | |
691 | ||
6e0414a5 | 692 | if (max8997->ignore_gpiodvs_side_effect == false) |
bd6ca2cf MH |
693 | return -EINVAL; |
694 | ||
695 | dev_warn(&rdev->dev, "MAX8997 GPIO-DVS Side Effect Warning: GPIO SET:" | |
696 | " %d -> %d\n", max8997->buck125_gpioindex, tmp_idx); | |
697 | ||
698 | out: | |
699 | if (new_idx < 0 || new_val < 0) | |
700 | return -EINVAL; | |
701 | ||
702 | max8997->buck125_gpioindex = new_idx; | |
703 | max8997_set_gpio(max8997); | |
704 | *selector = new_val; | |
705 | ||
706 | return 0; | |
707 | } | |
708 | ||
709 | static const int safeoutvolt[] = { | |
710 | 3300000, | |
711 | 4850000, | |
712 | 4900000, | |
713 | 4950000, | |
714 | }; | |
715 | ||
716 | /* For SAFEOUT1 and SAFEOUT2 */ | |
717 | static int max8997_set_voltage_safeout(struct regulator_dev *rdev, | |
718 | int min_uV, int max_uV, unsigned *selector) | |
719 | { | |
720 | struct max8997_data *max8997 = rdev_get_drvdata(rdev); | |
721 | struct i2c_client *i2c = max8997->iodev->i2c; | |
b3e1348e | 722 | int rid = rdev_get_id(rdev); |
bd6ca2cf MH |
723 | int reg, shift = 0, mask, ret; |
724 | int i = 0; | |
725 | u8 val; | |
726 | ||
727 | if (rid != MAX8997_ESAFEOUT1 && rid != MAX8997_ESAFEOUT2) | |
728 | return -EINVAL; | |
729 | ||
730 | for (i = 0; i < ARRAY_SIZE(safeoutvolt); i++) { | |
731 | if (min_uV <= safeoutvolt[i] && | |
732 | max_uV >= safeoutvolt[i]) | |
733 | break; | |
734 | } | |
735 | ||
736 | if (i >= ARRAY_SIZE(safeoutvolt)) | |
737 | return -EINVAL; | |
738 | ||
739 | if (i == 0) | |
740 | val = 0x3; | |
741 | else | |
742 | val = i - 1; | |
743 | ||
744 | ret = max8997_get_voltage_register(rdev, ®, &shift, &mask); | |
745 | if (ret) | |
746 | return ret; | |
747 | ||
748 | ret = max8997_update_reg(i2c, reg, val << shift, mask << shift); | |
749 | *selector = val; | |
750 | ||
751 | return ret; | |
752 | } | |
753 | ||
754 | static int max8997_reg_enable_suspend(struct regulator_dev *rdev) | |
755 | { | |
756 | return 0; | |
757 | } | |
758 | ||
759 | static int max8997_reg_disable_suspend(struct regulator_dev *rdev) | |
760 | { | |
761 | struct max8997_data *max8997 = rdev_get_drvdata(rdev); | |
762 | struct i2c_client *i2c = max8997->iodev->i2c; | |
763 | int ret, reg, mask, pattern; | |
b3e1348e | 764 | int rid = rdev_get_id(rdev); |
bd6ca2cf MH |
765 | |
766 | ret = max8997_get_enable_register(rdev, ®, &mask, &pattern); | |
767 | if (ret) | |
768 | return ret; | |
769 | ||
770 | max8997_read_reg(i2c, reg, &max8997->saved_states[rid]); | |
771 | ||
772 | if (rid == MAX8997_LDO1 || | |
773 | rid == MAX8997_LDO10 || | |
774 | rid == MAX8997_LDO21) { | |
775 | dev_dbg(&rdev->dev, "Conditional Power-Off for %s\n", | |
776 | rdev->desc->name); | |
777 | return max8997_update_reg(i2c, reg, 0x40, mask); | |
778 | } | |
779 | ||
780 | dev_dbg(&rdev->dev, "Full Power-Off for %s (%xh -> %xh)\n", | |
781 | rdev->desc->name, max8997->saved_states[rid] & mask, | |
782 | (~pattern) & mask); | |
783 | return max8997_update_reg(i2c, reg, ~pattern, mask); | |
784 | } | |
785 | ||
786 | static struct regulator_ops max8997_ldo_ops = { | |
787 | .list_voltage = max8997_list_voltage, | |
788 | .is_enabled = max8997_reg_is_enabled, | |
789 | .enable = max8997_reg_enable, | |
790 | .disable = max8997_reg_disable, | |
791 | .get_voltage = max8997_get_voltage, | |
792 | .set_voltage = max8997_set_voltage_ldobuck, | |
793 | .set_suspend_enable = max8997_reg_enable_suspend, | |
794 | .set_suspend_disable = max8997_reg_disable_suspend, | |
795 | }; | |
796 | ||
797 | static struct regulator_ops max8997_buck_ops = { | |
798 | .list_voltage = max8997_list_voltage, | |
799 | .is_enabled = max8997_reg_is_enabled, | |
800 | .enable = max8997_reg_enable, | |
801 | .disable = max8997_reg_disable, | |
802 | .get_voltage = max8997_get_voltage, | |
803 | .set_voltage = max8997_set_voltage_buck, | |
804 | .set_suspend_enable = max8997_reg_enable_suspend, | |
805 | .set_suspend_disable = max8997_reg_disable_suspend, | |
806 | }; | |
807 | ||
808 | static struct regulator_ops max8997_fixedvolt_ops = { | |
809 | .list_voltage = max8997_list_voltage, | |
810 | .is_enabled = max8997_reg_is_enabled, | |
811 | .enable = max8997_reg_enable, | |
812 | .disable = max8997_reg_disable, | |
813 | .set_suspend_enable = max8997_reg_enable_suspend, | |
814 | .set_suspend_disable = max8997_reg_disable_suspend, | |
815 | }; | |
816 | ||
817 | static struct regulator_ops max8997_safeout_ops = { | |
818 | .list_voltage = max8997_list_voltage_safeout, | |
819 | .is_enabled = max8997_reg_is_enabled, | |
820 | .enable = max8997_reg_enable, | |
821 | .disable = max8997_reg_disable, | |
822 | .get_voltage = max8997_get_voltage, | |
823 | .set_voltage = max8997_set_voltage_safeout, | |
824 | .set_suspend_enable = max8997_reg_enable_suspend, | |
825 | .set_suspend_disable = max8997_reg_disable_suspend, | |
826 | }; | |
827 | ||
828 | static struct regulator_ops max8997_fixedstate_ops = { | |
829 | .list_voltage = max8997_list_voltage_charger_cv, | |
830 | .get_voltage = max8997_get_voltage, | |
831 | .set_voltage = max8997_set_voltage_charger_cv, | |
832 | }; | |
833 | ||
834 | static int max8997_set_voltage_ldobuck_wrap(struct regulator_dev *rdev, | |
835 | int min_uV, int max_uV) | |
836 | { | |
837 | unsigned dummy; | |
838 | ||
839 | return max8997_set_voltage_ldobuck(rdev, min_uV, max_uV, &dummy); | |
840 | } | |
841 | ||
842 | ||
843 | static struct regulator_ops max8997_charger_ops = { | |
844 | .is_enabled = max8997_reg_is_enabled, | |
845 | .enable = max8997_reg_enable, | |
846 | .disable = max8997_reg_disable, | |
847 | .get_current_limit = max8997_get_voltage, | |
848 | .set_current_limit = max8997_set_voltage_ldobuck_wrap, | |
849 | }; | |
850 | ||
851 | static struct regulator_ops max8997_charger_fixedstate_ops = { | |
852 | .is_enabled = max8997_reg_is_enabled, | |
853 | .get_current_limit = max8997_get_voltage, | |
854 | .set_current_limit = max8997_set_voltage_ldobuck_wrap, | |
855 | }; | |
856 | ||
857 | #define regulator_desc_ldo(num) { \ | |
858 | .name = "LDO"#num, \ | |
859 | .id = MAX8997_LDO##num, \ | |
860 | .ops = &max8997_ldo_ops, \ | |
861 | .type = REGULATOR_VOLTAGE, \ | |
862 | .owner = THIS_MODULE, \ | |
863 | } | |
864 | #define regulator_desc_buck(num) { \ | |
865 | .name = "BUCK"#num, \ | |
866 | .id = MAX8997_BUCK##num, \ | |
867 | .ops = &max8997_buck_ops, \ | |
868 | .type = REGULATOR_VOLTAGE, \ | |
869 | .owner = THIS_MODULE, \ | |
870 | } | |
871 | ||
872 | static struct regulator_desc regulators[] = { | |
873 | regulator_desc_ldo(1), | |
874 | regulator_desc_ldo(2), | |
875 | regulator_desc_ldo(3), | |
876 | regulator_desc_ldo(4), | |
877 | regulator_desc_ldo(5), | |
878 | regulator_desc_ldo(6), | |
879 | regulator_desc_ldo(7), | |
880 | regulator_desc_ldo(8), | |
881 | regulator_desc_ldo(9), | |
882 | regulator_desc_ldo(10), | |
883 | regulator_desc_ldo(11), | |
884 | regulator_desc_ldo(12), | |
885 | regulator_desc_ldo(13), | |
886 | regulator_desc_ldo(14), | |
887 | regulator_desc_ldo(15), | |
888 | regulator_desc_ldo(16), | |
889 | regulator_desc_ldo(17), | |
890 | regulator_desc_ldo(18), | |
891 | regulator_desc_ldo(21), | |
892 | regulator_desc_buck(1), | |
893 | regulator_desc_buck(2), | |
894 | regulator_desc_buck(3), | |
895 | regulator_desc_buck(4), | |
896 | regulator_desc_buck(5), | |
897 | { | |
898 | .name = "BUCK6", | |
899 | .id = MAX8997_BUCK6, | |
900 | .ops = &max8997_fixedvolt_ops, | |
901 | .type = REGULATOR_VOLTAGE, | |
902 | .owner = THIS_MODULE, | |
903 | }, | |
904 | regulator_desc_buck(7), | |
905 | { | |
e371ceb8 | 906 | .name = "EN32KHz_AP", |
bd6ca2cf MH |
907 | .id = MAX8997_EN32KHZ_AP, |
908 | .ops = &max8997_fixedvolt_ops, | |
909 | .type = REGULATOR_VOLTAGE, | |
910 | .owner = THIS_MODULE, | |
911 | }, { | |
e371ceb8 | 912 | .name = "EN32KHz_CP", |
bd6ca2cf MH |
913 | .id = MAX8997_EN32KHZ_CP, |
914 | .ops = &max8997_fixedvolt_ops, | |
915 | .type = REGULATOR_VOLTAGE, | |
916 | .owner = THIS_MODULE, | |
917 | }, { | |
918 | .name = "ENVICHG", | |
919 | .id = MAX8997_ENVICHG, | |
920 | .ops = &max8997_fixedvolt_ops, | |
921 | .type = REGULATOR_VOLTAGE, | |
922 | .owner = THIS_MODULE, | |
923 | }, { | |
924 | .name = "ESAFEOUT1", | |
925 | .id = MAX8997_ESAFEOUT1, | |
926 | .ops = &max8997_safeout_ops, | |
927 | .type = REGULATOR_VOLTAGE, | |
928 | .owner = THIS_MODULE, | |
929 | }, { | |
930 | .name = "ESAFEOUT2", | |
931 | .id = MAX8997_ESAFEOUT2, | |
932 | .ops = &max8997_safeout_ops, | |
933 | .type = REGULATOR_VOLTAGE, | |
934 | .owner = THIS_MODULE, | |
935 | }, { | |
e371ceb8 | 936 | .name = "CHARGER_CV", |
bd6ca2cf MH |
937 | .id = MAX8997_CHARGER_CV, |
938 | .ops = &max8997_fixedstate_ops, | |
939 | .type = REGULATOR_VOLTAGE, | |
940 | .owner = THIS_MODULE, | |
941 | }, { | |
942 | .name = "CHARGER", | |
943 | .id = MAX8997_CHARGER, | |
944 | .ops = &max8997_charger_ops, | |
945 | .type = REGULATOR_CURRENT, | |
946 | .owner = THIS_MODULE, | |
947 | }, { | |
e371ceb8 | 948 | .name = "CHARGER_TOPOFF", |
bd6ca2cf MH |
949 | .id = MAX8997_CHARGER_TOPOFF, |
950 | .ops = &max8997_charger_fixedstate_ops, | |
951 | .type = REGULATOR_CURRENT, | |
952 | .owner = THIS_MODULE, | |
953 | }, | |
954 | }; | |
955 | ||
956 | static __devinit int max8997_pmic_probe(struct platform_device *pdev) | |
957 | { | |
958 | struct max8997_dev *iodev = dev_get_drvdata(pdev->dev.parent); | |
959 | struct max8997_platform_data *pdata = dev_get_platdata(iodev->dev); | |
960 | struct regulator_dev **rdev; | |
961 | struct max8997_data *max8997; | |
962 | struct i2c_client *i2c; | |
963 | int i, ret, size; | |
964 | u8 max_buck1 = 0, max_buck2 = 0, max_buck5 = 0; | |
965 | ||
966 | if (!pdata) { | |
967 | dev_err(pdev->dev.parent, "No platform init data supplied.\n"); | |
968 | return -ENODEV; | |
969 | } | |
970 | ||
971 | max8997 = kzalloc(sizeof(struct max8997_data), GFP_KERNEL); | |
972 | if (!max8997) | |
973 | return -ENOMEM; | |
974 | ||
975 | size = sizeof(struct regulator_dev *) * pdata->num_regulators; | |
976 | max8997->rdev = kzalloc(size, GFP_KERNEL); | |
977 | if (!max8997->rdev) { | |
978 | kfree(max8997); | |
979 | return -ENOMEM; | |
980 | } | |
981 | ||
982 | rdev = max8997->rdev; | |
983 | max8997->dev = &pdev->dev; | |
984 | max8997->iodev = iodev; | |
985 | max8997->num_regulators = pdata->num_regulators; | |
986 | platform_set_drvdata(pdev, max8997); | |
987 | i2c = max8997->iodev->i2c; | |
988 | ||
989 | max8997->buck125_gpioindex = pdata->buck125_default_idx; | |
6e0414a5 MH |
990 | max8997->buck1_gpiodvs = pdata->buck1_gpiodvs; |
991 | max8997->buck2_gpiodvs = pdata->buck2_gpiodvs; | |
992 | max8997->buck5_gpiodvs = pdata->buck5_gpiodvs; | |
993 | memcpy(max8997->buck125_gpios, pdata->buck125_gpios, sizeof(int) * 3); | |
994 | max8997->ignore_gpiodvs_side_effect = pdata->ignore_gpiodvs_side_effect; | |
bd6ca2cf MH |
995 | |
996 | for (i = 0; i < 8; i++) { | |
997 | max8997->buck1_vol[i] = ret = | |
998 | max8997_get_voltage_proper_val( | |
999 | &buck1245_voltage_map_desc, | |
1000 | pdata->buck1_voltage[i] / 1000, | |
1001 | pdata->buck1_voltage[i] / 1000 + | |
1002 | buck1245_voltage_map_desc.step); | |
1003 | if (ret < 0) | |
1004 | goto err_alloc; | |
1005 | ||
1006 | max8997->buck2_vol[i] = ret = | |
1007 | max8997_get_voltage_proper_val( | |
1008 | &buck1245_voltage_map_desc, | |
1009 | pdata->buck2_voltage[i] / 1000, | |
1010 | pdata->buck2_voltage[i] / 1000 + | |
1011 | buck1245_voltage_map_desc.step); | |
1012 | if (ret < 0) | |
1013 | goto err_alloc; | |
1014 | ||
1015 | max8997->buck5_vol[i] = ret = | |
1016 | max8997_get_voltage_proper_val( | |
1017 | &buck1245_voltage_map_desc, | |
1018 | pdata->buck5_voltage[i] / 1000, | |
1019 | pdata->buck5_voltage[i] / 1000 + | |
1020 | buck1245_voltage_map_desc.step); | |
1021 | if (ret < 0) | |
1022 | goto err_alloc; | |
1023 | ||
1024 | if (max_buck1 < max8997->buck1_vol[i]) | |
1025 | max_buck1 = max8997->buck1_vol[i]; | |
1026 | if (max_buck2 < max8997->buck2_vol[i]) | |
1027 | max_buck2 = max8997->buck2_vol[i]; | |
1028 | if (max_buck5 < max8997->buck5_vol[i]) | |
1029 | max_buck5 = max8997->buck5_vol[i]; | |
1030 | } | |
1031 | ||
1032 | /* For the safety, set max voltage before setting up */ | |
1033 | for (i = 0; i < 8; i++) { | |
ecb9c4f5 | 1034 | max8997_update_reg(i2c, MAX8997_REG_BUCK1DVS1 + i, |
bd6ca2cf | 1035 | max_buck1, 0x3f); |
ecb9c4f5 | 1036 | max8997_update_reg(i2c, MAX8997_REG_BUCK2DVS1 + i, |
bd6ca2cf | 1037 | max_buck2, 0x3f); |
ecb9c4f5 | 1038 | max8997_update_reg(i2c, MAX8997_REG_BUCK5DVS1 + i, |
bd6ca2cf MH |
1039 | max_buck5, 0x3f); |
1040 | } | |
1041 | ||
1042 | /* | |
1043 | * If buck 1, 2, and 5 do not care DVS GPIO settings, ignore them. | |
1044 | * If at least one of them cares, set gpios. | |
1045 | */ | |
1046 | if (pdata->buck1_gpiodvs || pdata->buck2_gpiodvs || | |
1047 | pdata->buck5_gpiodvs) { | |
1048 | bool gpio1set = false, gpio2set = false; | |
1049 | ||
1050 | if (!gpio_is_valid(pdata->buck125_gpios[0]) || | |
1051 | !gpio_is_valid(pdata->buck125_gpios[1]) || | |
1052 | !gpio_is_valid(pdata->buck125_gpios[2])) { | |
1053 | dev_err(&pdev->dev, "GPIO NOT VALID\n"); | |
1054 | ret = -EINVAL; | |
1055 | goto err_alloc; | |
1056 | } | |
1057 | ||
1058 | ret = gpio_request(pdata->buck125_gpios[0], | |
1059 | "MAX8997 SET1"); | |
1060 | if (ret == -EBUSY) | |
1061 | dev_warn(&pdev->dev, "Duplicated gpio request" | |
1062 | " on SET1\n"); | |
1063 | else if (ret) | |
1064 | goto err_alloc; | |
1065 | else | |
1066 | gpio1set = true; | |
1067 | ||
1068 | ret = gpio_request(pdata->buck125_gpios[1], | |
1069 | "MAX8997 SET2"); | |
1070 | if (ret == -EBUSY) | |
1071 | dev_warn(&pdev->dev, "Duplicated gpio request" | |
1072 | " on SET2\n"); | |
1073 | else if (ret) { | |
1074 | if (gpio1set) | |
1075 | gpio_free(pdata->buck125_gpios[0]); | |
1076 | goto err_alloc; | |
1077 | } else | |
1078 | gpio2set = true; | |
1079 | ||
1080 | ret = gpio_request(pdata->buck125_gpios[2], | |
1081 | "MAX8997 SET3"); | |
1082 | if (ret == -EBUSY) | |
1083 | dev_warn(&pdev->dev, "Duplicated gpio request" | |
1084 | " on SET3\n"); | |
1085 | else if (ret) { | |
1086 | if (gpio1set) | |
1087 | gpio_free(pdata->buck125_gpios[0]); | |
1088 | if (gpio2set) | |
1089 | gpio_free(pdata->buck125_gpios[1]); | |
1090 | goto err_alloc; | |
1091 | } | |
1092 | ||
1093 | gpio_direction_output(pdata->buck125_gpios[0], | |
1094 | (max8997->buck125_gpioindex >> 2) | |
1095 | & 0x1); /* SET1 */ | |
1096 | gpio_direction_output(pdata->buck125_gpios[1], | |
1097 | (max8997->buck125_gpioindex >> 1) | |
1098 | & 0x1); /* SET2 */ | |
1099 | gpio_direction_output(pdata->buck125_gpios[2], | |
1100 | (max8997->buck125_gpioindex >> 0) | |
1101 | & 0x1); /* SET3 */ | |
1102 | ret = 0; | |
1103 | } | |
1104 | ||
1105 | /* DVS-GPIO disabled */ | |
1106 | max8997_update_reg(i2c, MAX8997_REG_BUCK1CTRL, (pdata->buck1_gpiodvs) ? | |
1107 | (1 << 1) : (0 << 1), 1 << 1); | |
1108 | max8997_update_reg(i2c, MAX8997_REG_BUCK2CTRL, (pdata->buck2_gpiodvs) ? | |
1109 | (1 << 1) : (0 << 1), 1 << 1); | |
1110 | max8997_update_reg(i2c, MAX8997_REG_BUCK5CTRL, (pdata->buck5_gpiodvs) ? | |
1111 | (1 << 1) : (0 << 1), 1 << 1); | |
1112 | ||
1113 | /* Initialize all the DVS related BUCK registers */ | |
1114 | for (i = 0; i < 8; i++) { | |
ecb9c4f5 | 1115 | max8997_update_reg(i2c, MAX8997_REG_BUCK1DVS1 + i, |
bd6ca2cf MH |
1116 | max8997->buck1_vol[i], |
1117 | 0x3f); | |
ecb9c4f5 | 1118 | max8997_update_reg(i2c, MAX8997_REG_BUCK2DVS1 + i, |
bd6ca2cf MH |
1119 | max8997->buck2_vol[i], |
1120 | 0x3f); | |
ecb9c4f5 | 1121 | max8997_update_reg(i2c, MAX8997_REG_BUCK5DVS1 + i, |
bd6ca2cf MH |
1122 | max8997->buck5_vol[i], |
1123 | 0x3f); | |
1124 | } | |
1125 | ||
dbb48e7c TB |
1126 | /* Misc Settings */ |
1127 | max8997->ramp_delay = 10; /* set 10mV/us, which is the default */ | |
1128 | max8997_write_reg(i2c, MAX8997_REG_BUCKRAMP, (0xf << 4) | 0x9); | |
1129 | ||
bd6ca2cf MH |
1130 | for (i = 0; i < pdata->num_regulators; i++) { |
1131 | const struct voltage_map_desc *desc; | |
1132 | int id = pdata->regulators[i].id; | |
1133 | ||
1134 | desc = reg_voltage_map[id]; | |
1135 | if (desc) | |
1136 | regulators[id].n_voltages = | |
1137 | (desc->max - desc->min) / desc->step + 1; | |
1138 | else if (id == MAX8997_ESAFEOUT1 || id == MAX8997_ESAFEOUT2) | |
1139 | regulators[id].n_voltages = 4; | |
1140 | else if (id == MAX8997_CHARGER_CV) | |
1141 | regulators[id].n_voltages = 16; | |
1142 | ||
1143 | rdev[i] = regulator_register(®ulators[id], max8997->dev, | |
2c043bcb | 1144 | pdata->regulators[i].initdata, max8997, NULL); |
bd6ca2cf MH |
1145 | if (IS_ERR(rdev[i])) { |
1146 | ret = PTR_ERR(rdev[i]); | |
1147 | dev_err(max8997->dev, "regulator init failed for %d\n", | |
1148 | id); | |
1149 | rdev[i] = NULL; | |
1150 | goto err; | |
1151 | } | |
1152 | } | |
1153 | ||
bd6ca2cf MH |
1154 | return 0; |
1155 | err: | |
1156 | for (i = 0; i < max8997->num_regulators; i++) | |
1157 | if (rdev[i]) | |
1158 | regulator_unregister(rdev[i]); | |
1159 | err_alloc: | |
1160 | kfree(max8997->rdev); | |
1161 | kfree(max8997); | |
1162 | ||
1163 | return ret; | |
1164 | } | |
1165 | ||
1166 | static int __devexit max8997_pmic_remove(struct platform_device *pdev) | |
1167 | { | |
1168 | struct max8997_data *max8997 = platform_get_drvdata(pdev); | |
1169 | struct regulator_dev **rdev = max8997->rdev; | |
1170 | int i; | |
1171 | ||
1172 | for (i = 0; i < max8997->num_regulators; i++) | |
1173 | if (rdev[i]) | |
1174 | regulator_unregister(rdev[i]); | |
1175 | ||
1176 | kfree(max8997->rdev); | |
1177 | kfree(max8997); | |
1178 | ||
1179 | return 0; | |
1180 | } | |
1181 | ||
1182 | static const struct platform_device_id max8997_pmic_id[] = { | |
1183 | { "max8997-pmic", 0}, | |
1184 | { }, | |
1185 | }; | |
a51b907b | 1186 | MODULE_DEVICE_TABLE(platform, max8997_pmic_id); |
bd6ca2cf MH |
1187 | |
1188 | static struct platform_driver max8997_pmic_driver = { | |
1189 | .driver = { | |
1190 | .name = "max8997-pmic", | |
1191 | .owner = THIS_MODULE, | |
1192 | }, | |
1193 | .probe = max8997_pmic_probe, | |
1194 | .remove = __devexit_p(max8997_pmic_remove), | |
1195 | .id_table = max8997_pmic_id, | |
1196 | }; | |
1197 | ||
1198 | static int __init max8997_pmic_init(void) | |
1199 | { | |
1200 | return platform_driver_register(&max8997_pmic_driver); | |
1201 | } | |
1202 | subsys_initcall(max8997_pmic_init); | |
1203 | ||
1204 | static void __exit max8997_pmic_cleanup(void) | |
1205 | { | |
1206 | platform_driver_unregister(&max8997_pmic_driver); | |
1207 | } | |
1208 | module_exit(max8997_pmic_cleanup); | |
1209 | ||
1210 | MODULE_DESCRIPTION("MAXIM 8997/8966 Regulator Driver"); | |
1211 | MODULE_AUTHOR("MyungJoo Ham <myungjoo.ham@samsung.com>"); | |
1212 | MODULE_LICENSE("GPL"); |