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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> | |
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 | ||
133 | static inline int max8997_get_rid(struct regulator_dev *rdev) | |
134 | { | |
135 | return rdev_get_id(rdev); | |
136 | } | |
137 | ||
138 | static int max8997_list_voltage_safeout(struct regulator_dev *rdev, | |
139 | unsigned int selector) | |
140 | { | |
141 | int rid = max8997_get_rid(rdev); | |
142 | ||
143 | if (rid == MAX8997_ESAFEOUT1 || rid == MAX8997_ESAFEOUT2) { | |
144 | switch (selector) { | |
145 | case 0: | |
146 | return 4850000; | |
147 | case 1: | |
148 | return 4900000; | |
149 | case 2: | |
150 | return 4950000; | |
151 | case 3: | |
152 | return 3300000; | |
153 | default: | |
154 | return -EINVAL; | |
155 | } | |
156 | } | |
157 | ||
158 | return -EINVAL; | |
159 | } | |
160 | ||
161 | static int max8997_list_voltage_charger_cv(struct regulator_dev *rdev, | |
162 | unsigned int selector) | |
163 | { | |
164 | int rid = max8997_get_rid(rdev); | |
165 | ||
166 | if (rid != MAX8997_CHARGER_CV) | |
167 | goto err; | |
168 | ||
169 | switch (selector) { | |
170 | case 0x00: | |
171 | return 4200000; | |
172 | case 0x01 ... 0x0E: | |
173 | return 4000000 + 20000 * (selector - 0x01); | |
174 | case 0x0F: | |
175 | return 4350000; | |
176 | default: | |
177 | return -EINVAL; | |
178 | } | |
179 | err: | |
180 | return -EINVAL; | |
181 | } | |
182 | ||
183 | static int max8997_list_voltage(struct regulator_dev *rdev, | |
184 | unsigned int selector) | |
185 | { | |
186 | const struct voltage_map_desc *desc; | |
187 | int rid = max8997_get_rid(rdev); | |
188 | int val; | |
189 | ||
190 | if (rid >= ARRAY_SIZE(reg_voltage_map) || | |
191 | rid < 0) | |
192 | return -EINVAL; | |
193 | ||
194 | desc = reg_voltage_map[rid]; | |
195 | if (desc == NULL) | |
196 | return -EINVAL; | |
197 | ||
198 | val = desc->min + desc->step * selector; | |
199 | if (val > desc->max) | |
200 | return -EINVAL; | |
201 | ||
202 | return val * 1000; | |
203 | } | |
204 | ||
205 | static int max8997_get_enable_register(struct regulator_dev *rdev, | |
206 | int *reg, int *mask, int *pattern) | |
207 | { | |
208 | int rid = max8997_get_rid(rdev); | |
209 | ||
210 | switch (rid) { | |
211 | case MAX8997_LDO1 ... MAX8997_LDO21: | |
212 | *reg = MAX8997_REG_LDO1CTRL + (rid - MAX8997_LDO1); | |
213 | *mask = 0xC0; | |
214 | *pattern = 0xC0; | |
215 | break; | |
216 | case MAX8997_BUCK1: | |
217 | *reg = MAX8997_REG_BUCK1CTRL; | |
218 | *mask = 0x01; | |
219 | *pattern = 0x01; | |
220 | break; | |
221 | case MAX8997_BUCK2: | |
222 | *reg = MAX8997_REG_BUCK2CTRL; | |
223 | *mask = 0x01; | |
224 | *pattern = 0x01; | |
225 | break; | |
226 | case MAX8997_BUCK3: | |
227 | *reg = MAX8997_REG_BUCK3CTRL; | |
228 | *mask = 0x01; | |
229 | *pattern = 0x01; | |
230 | break; | |
231 | case MAX8997_BUCK4: | |
232 | *reg = MAX8997_REG_BUCK4CTRL; | |
233 | *mask = 0x01; | |
234 | *pattern = 0x01; | |
235 | break; | |
236 | case MAX8997_BUCK5: | |
237 | *reg = MAX8997_REG_BUCK5CTRL; | |
238 | *mask = 0x01; | |
239 | *pattern = 0x01; | |
240 | break; | |
241 | case MAX8997_BUCK6: | |
242 | *reg = MAX8997_REG_BUCK6CTRL; | |
243 | *mask = 0x01; | |
244 | *pattern = 0x01; | |
245 | break; | |
246 | case MAX8997_BUCK7: | |
247 | *reg = MAX8997_REG_BUCK7CTRL; | |
248 | *mask = 0x01; | |
249 | *pattern = 0x01; | |
250 | break; | |
251 | case MAX8997_EN32KHZ_AP ... MAX8997_EN32KHZ_CP: | |
252 | *reg = MAX8997_REG_MAINCON1; | |
253 | *mask = 0x01 << (rid - MAX8997_EN32KHZ_AP); | |
254 | *pattern = 0x01 << (rid - MAX8997_EN32KHZ_AP); | |
255 | break; | |
256 | case MAX8997_ENVICHG: | |
257 | *reg = MAX8997_REG_MBCCTRL1; | |
258 | *mask = 0x80; | |
259 | *pattern = 0x80; | |
260 | break; | |
261 | case MAX8997_ESAFEOUT1 ... MAX8997_ESAFEOUT2: | |
262 | *reg = MAX8997_REG_SAFEOUTCTRL; | |
263 | *mask = 0x40 << (rid - MAX8997_ESAFEOUT1); | |
264 | *pattern = 0x40 << (rid - MAX8997_ESAFEOUT1); | |
265 | break; | |
266 | case MAX8997_CHARGER: | |
267 | *reg = MAX8997_REG_MBCCTRL2; | |
268 | *mask = 0x40; | |
269 | *pattern = 0x40; | |
270 | break; | |
271 | default: | |
272 | /* Not controllable or not exists */ | |
273 | return -EINVAL; | |
bd6ca2cf MH |
274 | } |
275 | ||
276 | return 0; | |
277 | } | |
278 | ||
279 | static int max8997_reg_is_enabled(struct regulator_dev *rdev) | |
280 | { | |
281 | struct max8997_data *max8997 = rdev_get_drvdata(rdev); | |
282 | struct i2c_client *i2c = max8997->iodev->i2c; | |
283 | int ret, reg, mask, pattern; | |
284 | u8 val; | |
285 | ||
286 | ret = max8997_get_enable_register(rdev, ®, &mask, &pattern); | |
287 | if (ret == -EINVAL) | |
288 | return 1; /* "not controllable" */ | |
289 | else if (ret) | |
290 | return ret; | |
291 | ||
292 | ret = max8997_read_reg(i2c, reg, &val); | |
293 | if (ret) | |
294 | return ret; | |
295 | ||
296 | return (val & mask) == pattern; | |
297 | } | |
298 | ||
299 | static int max8997_reg_enable(struct regulator_dev *rdev) | |
300 | { | |
301 | struct max8997_data *max8997 = rdev_get_drvdata(rdev); | |
302 | struct i2c_client *i2c = max8997->iodev->i2c; | |
303 | int ret, reg, mask, pattern; | |
304 | ||
305 | ret = max8997_get_enable_register(rdev, ®, &mask, &pattern); | |
306 | if (ret) | |
307 | return ret; | |
308 | ||
309 | return max8997_update_reg(i2c, reg, pattern, mask); | |
310 | } | |
311 | ||
312 | static int max8997_reg_disable(struct regulator_dev *rdev) | |
313 | { | |
314 | struct max8997_data *max8997 = rdev_get_drvdata(rdev); | |
315 | struct i2c_client *i2c = max8997->iodev->i2c; | |
316 | int ret, reg, mask, pattern; | |
317 | ||
318 | ret = max8997_get_enable_register(rdev, ®, &mask, &pattern); | |
319 | if (ret) | |
320 | return ret; | |
321 | ||
322 | return max8997_update_reg(i2c, reg, ~pattern, mask); | |
323 | } | |
324 | ||
325 | static int max8997_get_voltage_register(struct regulator_dev *rdev, | |
326 | int *_reg, int *_shift, int *_mask) | |
327 | { | |
328 | int rid = max8997_get_rid(rdev); | |
329 | int reg, shift = 0, mask = 0x3f; | |
330 | ||
331 | switch (rid) { | |
332 | case MAX8997_LDO1 ... MAX8997_LDO21: | |
333 | reg = MAX8997_REG_LDO1CTRL + (rid - MAX8997_LDO1); | |
334 | break; | |
335 | case MAX8997_BUCK1: | |
336 | reg = MAX8997_REG_BUCK1DVS1; | |
337 | break; | |
338 | case MAX8997_BUCK2: | |
339 | reg = MAX8997_REG_BUCK2DVS1; | |
340 | break; | |
341 | case MAX8997_BUCK3: | |
342 | reg = MAX8997_REG_BUCK3DVS; | |
343 | break; | |
344 | case MAX8997_BUCK4: | |
345 | reg = MAX8997_REG_BUCK4DVS; | |
346 | break; | |
347 | case MAX8997_BUCK5: | |
348 | reg = MAX8997_REG_BUCK5DVS1; | |
349 | break; | |
350 | case MAX8997_BUCK7: | |
351 | reg = MAX8997_REG_BUCK7DVS; | |
352 | break; | |
353 | case MAX8997_ESAFEOUT1 ... MAX8997_ESAFEOUT2: | |
354 | reg = MAX8997_REG_SAFEOUTCTRL; | |
355 | shift = (rid == MAX8997_ESAFEOUT2) ? 2 : 0; | |
356 | mask = 0x3; | |
357 | break; | |
358 | case MAX8997_CHARGER_CV: | |
359 | reg = MAX8997_REG_MBCCTRL3; | |
360 | shift = 0; | |
361 | mask = 0xf; | |
362 | break; | |
363 | case MAX8997_CHARGER: | |
364 | reg = MAX8997_REG_MBCCTRL4; | |
365 | shift = 0; | |
366 | mask = 0xf; | |
367 | break; | |
368 | case MAX8997_CHARGER_TOPOFF: | |
369 | reg = MAX8997_REG_MBCCTRL5; | |
370 | shift = 0; | |
371 | mask = 0xf; | |
372 | break; | |
373 | default: | |
374 | return -EINVAL; | |
375 | } | |
376 | ||
377 | *_reg = reg; | |
378 | *_shift = shift; | |
379 | *_mask = mask; | |
380 | ||
381 | return 0; | |
382 | } | |
383 | ||
384 | static int max8997_get_voltage(struct regulator_dev *rdev) | |
385 | { | |
386 | struct max8997_data *max8997 = rdev_get_drvdata(rdev); | |
bd6ca2cf MH |
387 | struct i2c_client *i2c = max8997->iodev->i2c; |
388 | int reg, shift, mask, ret; | |
389 | int rid = max8997_get_rid(rdev); | |
390 | u8 val; | |
391 | ||
392 | ret = max8997_get_voltage_register(rdev, ®, &shift, &mask); | |
393 | if (ret) | |
394 | return ret; | |
395 | ||
6e0414a5 MH |
396 | if ((rid == MAX8997_BUCK1 && max8997->buck1_gpiodvs) || |
397 | (rid == MAX8997_BUCK2 && max8997->buck2_gpiodvs) || | |
398 | (rid == MAX8997_BUCK5 && max8997->buck5_gpiodvs)) | |
bd6ca2cf MH |
399 | reg += max8997->buck125_gpioindex; |
400 | ||
401 | ret = max8997_read_reg(i2c, reg, &val); | |
402 | if (ret) | |
403 | return ret; | |
404 | ||
405 | val >>= shift; | |
406 | val &= mask; | |
407 | ||
408 | if (rdev->desc && rdev->desc->ops && rdev->desc->ops->list_voltage) | |
409 | return rdev->desc->ops->list_voltage(rdev, val); | |
410 | ||
411 | /* | |
412 | * max8997_list_voltage returns value for any rdev with voltage_map, | |
413 | * which works for "CHARGER" and "CHARGER TOPOFF" that do not have | |
414 | * list_voltage ops (they are current regulators). | |
415 | */ | |
416 | return max8997_list_voltage(rdev, val); | |
417 | } | |
418 | ||
419 | static inline int max8997_get_voltage_proper_val( | |
420 | const struct voltage_map_desc *desc, | |
421 | int min_vol, int max_vol) | |
422 | { | |
423 | int i = 0; | |
424 | ||
425 | if (desc == NULL) | |
426 | return -EINVAL; | |
427 | ||
428 | if (max_vol < desc->min || min_vol > desc->max) | |
429 | return -EINVAL; | |
430 | ||
431 | while (desc->min + desc->step * i < min_vol && | |
432 | desc->min + desc->step * i < desc->max) | |
433 | i++; | |
434 | ||
435 | if (desc->min + desc->step * i > max_vol) | |
436 | return -EINVAL; | |
437 | ||
438 | if (i >= (1 << desc->n_bits)) | |
439 | return -EINVAL; | |
440 | ||
441 | return i; | |
442 | } | |
443 | ||
444 | static int max8997_set_voltage_charger_cv(struct regulator_dev *rdev, | |
445 | int min_uV, int max_uV, unsigned *selector) | |
446 | { | |
447 | struct max8997_data *max8997 = rdev_get_drvdata(rdev); | |
448 | struct i2c_client *i2c = max8997->iodev->i2c; | |
449 | int rid = max8997_get_rid(rdev); | |
450 | int lb, ub; | |
451 | int reg, shift = 0, mask, ret = 0; | |
452 | u8 val = 0x0; | |
453 | ||
454 | if (rid != MAX8997_CHARGER_CV) | |
455 | return -EINVAL; | |
456 | ||
457 | ret = max8997_get_voltage_register(rdev, ®, &shift, &mask); | |
458 | if (ret) | |
459 | return ret; | |
460 | ||
461 | if (max_uV < 4000000 || min_uV > 4350000) | |
462 | return -EINVAL; | |
463 | ||
464 | if (min_uV <= 4000000) { | |
465 | if (max_uV >= 4000000) | |
466 | return -EINVAL; | |
467 | else | |
468 | val = 0x1; | |
469 | } else if (min_uV <= 4200000 && max_uV >= 4200000) | |
470 | val = 0x0; | |
471 | else { | |
472 | lb = (min_uV - 4000001) / 20000 + 2; | |
473 | ub = (max_uV - 4000000) / 20000 + 1; | |
474 | ||
475 | if (lb > ub) | |
476 | return -EINVAL; | |
477 | ||
478 | if (lb < 0xf) | |
479 | val = lb; | |
480 | else { | |
481 | if (ub >= 0xf) | |
482 | val = 0xf; | |
483 | else | |
484 | return -EINVAL; | |
485 | } | |
486 | } | |
487 | ||
488 | *selector = val; | |
489 | ||
490 | ret = max8997_update_reg(i2c, reg, val << shift, mask); | |
491 | ||
492 | return ret; | |
493 | } | |
494 | ||
495 | /* | |
496 | * For LDO1 ~ LDO21, BUCK1~5, BUCK7, CHARGER, CHARGER_TOPOFF | |
497 | * BUCK1, 2, and 5 are available if they are not controlled by gpio | |
498 | */ | |
499 | static int max8997_set_voltage_ldobuck(struct regulator_dev *rdev, | |
500 | int min_uV, int max_uV, unsigned *selector) | |
501 | { | |
502 | struct max8997_data *max8997 = rdev_get_drvdata(rdev); | |
503 | struct i2c_client *i2c = max8997->iodev->i2c; | |
504 | int min_vol = min_uV / 1000, max_vol = max_uV / 1000; | |
505 | const struct voltage_map_desc *desc; | |
506 | int rid = max8997_get_rid(rdev); | |
507 | int reg, shift = 0, mask, ret; | |
508 | int i; | |
509 | u8 org; | |
510 | ||
511 | switch (rid) { | |
512 | case MAX8997_LDO1 ... MAX8997_LDO21: | |
513 | break; | |
514 | case MAX8997_BUCK1 ... MAX8997_BUCK5: | |
515 | break; | |
516 | case MAX8997_BUCK6: | |
517 | return -EINVAL; | |
518 | case MAX8997_BUCK7: | |
519 | break; | |
520 | case MAX8997_CHARGER: | |
521 | break; | |
522 | case MAX8997_CHARGER_TOPOFF: | |
523 | break; | |
524 | default: | |
525 | return -EINVAL; | |
526 | } | |
527 | ||
528 | desc = reg_voltage_map[rid]; | |
529 | ||
530 | i = max8997_get_voltage_proper_val(desc, min_vol, max_vol); | |
531 | if (i < 0) | |
532 | return i; | |
533 | ||
534 | ret = max8997_get_voltage_register(rdev, ®, &shift, &mask); | |
535 | if (ret) | |
536 | return ret; | |
537 | ||
538 | max8997_read_reg(i2c, reg, &org); | |
539 | org = (org & mask) >> shift; | |
540 | ||
541 | ret = max8997_update_reg(i2c, reg, i << shift, mask << shift); | |
542 | *selector = i; | |
543 | ||
544 | if (rid == MAX8997_BUCK1 || rid == MAX8997_BUCK2 || | |
545 | rid == MAX8997_BUCK4 || rid == MAX8997_BUCK5) { | |
546 | /* If the voltage is increasing */ | |
547 | if (org < i) | |
6ff325a2 DK |
548 | udelay(DIV_ROUND_UP(desc->step * (i - org), |
549 | max8997->ramp_delay)); | |
bd6ca2cf MH |
550 | } |
551 | ||
552 | return ret; | |
553 | } | |
554 | ||
555 | /* | |
556 | * Assess the damage on the voltage setting of BUCK1,2,5 by the change. | |
557 | * | |
558 | * When GPIO-DVS mode is used for multiple bucks, changing the voltage value | |
559 | * of one of the bucks may affect that of another buck, which is the side | |
560 | * effect of the change (set_voltage). This function examines the GPIO-DVS | |
561 | * configurations and checks whether such side-effect exists. | |
562 | */ | |
563 | static int max8997_assess_side_effect(struct regulator_dev *rdev, | |
564 | u8 new_val, int *best) | |
565 | { | |
566 | struct max8997_data *max8997 = rdev_get_drvdata(rdev); | |
bd6ca2cf MH |
567 | int rid = max8997_get_rid(rdev); |
568 | u8 *buckx_val[3]; | |
569 | bool buckx_gpiodvs[3]; | |
570 | int side_effect[8]; | |
571 | int min_side_effect = INT_MAX; | |
572 | int i; | |
573 | ||
574 | *best = -1; | |
575 | ||
576 | switch (rid) { | |
577 | case MAX8997_BUCK1: | |
578 | rid = 0; | |
579 | break; | |
580 | case MAX8997_BUCK2: | |
581 | rid = 1; | |
582 | break; | |
583 | case MAX8997_BUCK5: | |
584 | rid = 2; | |
585 | break; | |
586 | default: | |
587 | return -EINVAL; | |
588 | } | |
589 | ||
590 | buckx_val[0] = max8997->buck1_vol; | |
591 | buckx_val[1] = max8997->buck2_vol; | |
592 | buckx_val[2] = max8997->buck5_vol; | |
6e0414a5 MH |
593 | buckx_gpiodvs[0] = max8997->buck1_gpiodvs; |
594 | buckx_gpiodvs[1] = max8997->buck2_gpiodvs; | |
595 | buckx_gpiodvs[2] = max8997->buck5_gpiodvs; | |
bd6ca2cf MH |
596 | |
597 | for (i = 0; i < 8; i++) { | |
598 | int others; | |
599 | ||
600 | if (new_val != (buckx_val[rid])[i]) { | |
601 | side_effect[i] = -1; | |
602 | continue; | |
603 | } | |
604 | ||
605 | side_effect[i] = 0; | |
606 | for (others = 0; others < 3; others++) { | |
607 | int diff; | |
608 | ||
609 | if (others == rid) | |
610 | continue; | |
611 | if (buckx_gpiodvs[others] == false) | |
612 | continue; /* Not affected */ | |
613 | diff = (buckx_val[others])[i] - | |
614 | (buckx_val[others])[max8997->buck125_gpioindex]; | |
615 | if (diff > 0) | |
616 | side_effect[i] += diff; | |
617 | else if (diff < 0) | |
618 | side_effect[i] -= diff; | |
619 | } | |
620 | if (side_effect[i] == 0) { | |
621 | *best = i; | |
622 | return 0; /* NO SIDE EFFECT! Use This! */ | |
623 | } | |
624 | if (side_effect[i] < min_side_effect) { | |
625 | min_side_effect = side_effect[i]; | |
626 | *best = i; | |
627 | } | |
628 | } | |
629 | ||
630 | if (*best == -1) | |
631 | return -EINVAL; | |
632 | ||
633 | return side_effect[*best]; | |
634 | } | |
635 | ||
636 | /* | |
637 | * For Buck 1 ~ 5 and 7. If it is not controlled by GPIO, this calls | |
638 | * max8997_set_voltage_ldobuck to do the job. | |
639 | */ | |
640 | static int max8997_set_voltage_buck(struct regulator_dev *rdev, | |
641 | int min_uV, int max_uV, unsigned *selector) | |
642 | { | |
643 | struct max8997_data *max8997 = rdev_get_drvdata(rdev); | |
bd6ca2cf MH |
644 | int rid = max8997_get_rid(rdev); |
645 | const struct voltage_map_desc *desc; | |
646 | int new_val, new_idx, damage, tmp_val, tmp_idx, tmp_dmg; | |
647 | bool gpio_dvs_mode = false; | |
648 | int min_vol = min_uV / 1000, max_vol = max_uV / 1000; | |
649 | ||
650 | if (rid < MAX8997_BUCK1 || rid > MAX8997_BUCK7) | |
651 | return -EINVAL; | |
652 | ||
653 | switch (rid) { | |
654 | case MAX8997_BUCK1: | |
6e0414a5 | 655 | if (max8997->buck1_gpiodvs) |
bd6ca2cf MH |
656 | gpio_dvs_mode = true; |
657 | break; | |
658 | case MAX8997_BUCK2: | |
6e0414a5 | 659 | if (max8997->buck2_gpiodvs) |
bd6ca2cf MH |
660 | gpio_dvs_mode = true; |
661 | break; | |
662 | case MAX8997_BUCK5: | |
6e0414a5 | 663 | if (max8997->buck5_gpiodvs) |
bd6ca2cf MH |
664 | gpio_dvs_mode = true; |
665 | break; | |
666 | } | |
667 | ||
668 | if (!gpio_dvs_mode) | |
669 | return max8997_set_voltage_ldobuck(rdev, min_uV, max_uV, | |
670 | selector); | |
671 | ||
672 | desc = reg_voltage_map[rid]; | |
673 | new_val = max8997_get_voltage_proper_val(desc, min_vol, max_vol); | |
674 | if (new_val < 0) | |
675 | return new_val; | |
676 | ||
677 | tmp_dmg = INT_MAX; | |
678 | tmp_idx = -1; | |
679 | tmp_val = -1; | |
680 | do { | |
681 | damage = max8997_assess_side_effect(rdev, new_val, &new_idx); | |
682 | if (damage == 0) | |
683 | goto out; | |
684 | ||
685 | if (tmp_dmg > damage) { | |
686 | tmp_idx = new_idx; | |
687 | tmp_val = new_val; | |
688 | tmp_dmg = damage; | |
689 | } | |
690 | ||
691 | new_val++; | |
692 | } while (desc->min + desc->step + new_val <= desc->max); | |
693 | ||
694 | new_idx = tmp_idx; | |
695 | new_val = tmp_val; | |
696 | ||
6e0414a5 | 697 | if (max8997->ignore_gpiodvs_side_effect == false) |
bd6ca2cf MH |
698 | return -EINVAL; |
699 | ||
700 | dev_warn(&rdev->dev, "MAX8997 GPIO-DVS Side Effect Warning: GPIO SET:" | |
701 | " %d -> %d\n", max8997->buck125_gpioindex, tmp_idx); | |
702 | ||
703 | out: | |
704 | if (new_idx < 0 || new_val < 0) | |
705 | return -EINVAL; | |
706 | ||
707 | max8997->buck125_gpioindex = new_idx; | |
708 | max8997_set_gpio(max8997); | |
709 | *selector = new_val; | |
710 | ||
711 | return 0; | |
712 | } | |
713 | ||
714 | static const int safeoutvolt[] = { | |
715 | 3300000, | |
716 | 4850000, | |
717 | 4900000, | |
718 | 4950000, | |
719 | }; | |
720 | ||
721 | /* For SAFEOUT1 and SAFEOUT2 */ | |
722 | static int max8997_set_voltage_safeout(struct regulator_dev *rdev, | |
723 | int min_uV, int max_uV, unsigned *selector) | |
724 | { | |
725 | struct max8997_data *max8997 = rdev_get_drvdata(rdev); | |
726 | struct i2c_client *i2c = max8997->iodev->i2c; | |
727 | int rid = max8997_get_rid(rdev); | |
728 | int reg, shift = 0, mask, ret; | |
729 | int i = 0; | |
730 | u8 val; | |
731 | ||
732 | if (rid != MAX8997_ESAFEOUT1 && rid != MAX8997_ESAFEOUT2) | |
733 | return -EINVAL; | |
734 | ||
735 | for (i = 0; i < ARRAY_SIZE(safeoutvolt); i++) { | |
736 | if (min_uV <= safeoutvolt[i] && | |
737 | max_uV >= safeoutvolt[i]) | |
738 | break; | |
739 | } | |
740 | ||
741 | if (i >= ARRAY_SIZE(safeoutvolt)) | |
742 | return -EINVAL; | |
743 | ||
744 | if (i == 0) | |
745 | val = 0x3; | |
746 | else | |
747 | val = i - 1; | |
748 | ||
749 | ret = max8997_get_voltage_register(rdev, ®, &shift, &mask); | |
750 | if (ret) | |
751 | return ret; | |
752 | ||
753 | ret = max8997_update_reg(i2c, reg, val << shift, mask << shift); | |
754 | *selector = val; | |
755 | ||
756 | return ret; | |
757 | } | |
758 | ||
759 | static int max8997_reg_enable_suspend(struct regulator_dev *rdev) | |
760 | { | |
761 | return 0; | |
762 | } | |
763 | ||
764 | static int max8997_reg_disable_suspend(struct regulator_dev *rdev) | |
765 | { | |
766 | struct max8997_data *max8997 = rdev_get_drvdata(rdev); | |
767 | struct i2c_client *i2c = max8997->iodev->i2c; | |
768 | int ret, reg, mask, pattern; | |
769 | int rid = max8997_get_rid(rdev); | |
770 | ||
771 | ret = max8997_get_enable_register(rdev, ®, &mask, &pattern); | |
772 | if (ret) | |
773 | return ret; | |
774 | ||
775 | max8997_read_reg(i2c, reg, &max8997->saved_states[rid]); | |
776 | ||
777 | if (rid == MAX8997_LDO1 || | |
778 | rid == MAX8997_LDO10 || | |
779 | rid == MAX8997_LDO21) { | |
780 | dev_dbg(&rdev->dev, "Conditional Power-Off for %s\n", | |
781 | rdev->desc->name); | |
782 | return max8997_update_reg(i2c, reg, 0x40, mask); | |
783 | } | |
784 | ||
785 | dev_dbg(&rdev->dev, "Full Power-Off for %s (%xh -> %xh)\n", | |
786 | rdev->desc->name, max8997->saved_states[rid] & mask, | |
787 | (~pattern) & mask); | |
788 | return max8997_update_reg(i2c, reg, ~pattern, mask); | |
789 | } | |
790 | ||
791 | static struct regulator_ops max8997_ldo_ops = { | |
792 | .list_voltage = max8997_list_voltage, | |
793 | .is_enabled = max8997_reg_is_enabled, | |
794 | .enable = max8997_reg_enable, | |
795 | .disable = max8997_reg_disable, | |
796 | .get_voltage = max8997_get_voltage, | |
797 | .set_voltage = max8997_set_voltage_ldobuck, | |
798 | .set_suspend_enable = max8997_reg_enable_suspend, | |
799 | .set_suspend_disable = max8997_reg_disable_suspend, | |
800 | }; | |
801 | ||
802 | static struct regulator_ops max8997_buck_ops = { | |
803 | .list_voltage = max8997_list_voltage, | |
804 | .is_enabled = max8997_reg_is_enabled, | |
805 | .enable = max8997_reg_enable, | |
806 | .disable = max8997_reg_disable, | |
807 | .get_voltage = max8997_get_voltage, | |
808 | .set_voltage = max8997_set_voltage_buck, | |
809 | .set_suspend_enable = max8997_reg_enable_suspend, | |
810 | .set_suspend_disable = max8997_reg_disable_suspend, | |
811 | }; | |
812 | ||
813 | static struct regulator_ops max8997_fixedvolt_ops = { | |
814 | .list_voltage = max8997_list_voltage, | |
815 | .is_enabled = max8997_reg_is_enabled, | |
816 | .enable = max8997_reg_enable, | |
817 | .disable = max8997_reg_disable, | |
818 | .set_suspend_enable = max8997_reg_enable_suspend, | |
819 | .set_suspend_disable = max8997_reg_disable_suspend, | |
820 | }; | |
821 | ||
822 | static struct regulator_ops max8997_safeout_ops = { | |
823 | .list_voltage = max8997_list_voltage_safeout, | |
824 | .is_enabled = max8997_reg_is_enabled, | |
825 | .enable = max8997_reg_enable, | |
826 | .disable = max8997_reg_disable, | |
827 | .get_voltage = max8997_get_voltage, | |
828 | .set_voltage = max8997_set_voltage_safeout, | |
829 | .set_suspend_enable = max8997_reg_enable_suspend, | |
830 | .set_suspend_disable = max8997_reg_disable_suspend, | |
831 | }; | |
832 | ||
833 | static struct regulator_ops max8997_fixedstate_ops = { | |
834 | .list_voltage = max8997_list_voltage_charger_cv, | |
835 | .get_voltage = max8997_get_voltage, | |
836 | .set_voltage = max8997_set_voltage_charger_cv, | |
837 | }; | |
838 | ||
839 | static int max8997_set_voltage_ldobuck_wrap(struct regulator_dev *rdev, | |
840 | int min_uV, int max_uV) | |
841 | { | |
842 | unsigned dummy; | |
843 | ||
844 | return max8997_set_voltage_ldobuck(rdev, min_uV, max_uV, &dummy); | |
845 | } | |
846 | ||
847 | ||
848 | static struct regulator_ops max8997_charger_ops = { | |
849 | .is_enabled = max8997_reg_is_enabled, | |
850 | .enable = max8997_reg_enable, | |
851 | .disable = max8997_reg_disable, | |
852 | .get_current_limit = max8997_get_voltage, | |
853 | .set_current_limit = max8997_set_voltage_ldobuck_wrap, | |
854 | }; | |
855 | ||
856 | static struct regulator_ops max8997_charger_fixedstate_ops = { | |
857 | .is_enabled = max8997_reg_is_enabled, | |
858 | .get_current_limit = max8997_get_voltage, | |
859 | .set_current_limit = max8997_set_voltage_ldobuck_wrap, | |
860 | }; | |
861 | ||
862 | #define regulator_desc_ldo(num) { \ | |
863 | .name = "LDO"#num, \ | |
864 | .id = MAX8997_LDO##num, \ | |
865 | .ops = &max8997_ldo_ops, \ | |
866 | .type = REGULATOR_VOLTAGE, \ | |
867 | .owner = THIS_MODULE, \ | |
868 | } | |
869 | #define regulator_desc_buck(num) { \ | |
870 | .name = "BUCK"#num, \ | |
871 | .id = MAX8997_BUCK##num, \ | |
872 | .ops = &max8997_buck_ops, \ | |
873 | .type = REGULATOR_VOLTAGE, \ | |
874 | .owner = THIS_MODULE, \ | |
875 | } | |
876 | ||
877 | static struct regulator_desc regulators[] = { | |
878 | regulator_desc_ldo(1), | |
879 | regulator_desc_ldo(2), | |
880 | regulator_desc_ldo(3), | |
881 | regulator_desc_ldo(4), | |
882 | regulator_desc_ldo(5), | |
883 | regulator_desc_ldo(6), | |
884 | regulator_desc_ldo(7), | |
885 | regulator_desc_ldo(8), | |
886 | regulator_desc_ldo(9), | |
887 | regulator_desc_ldo(10), | |
888 | regulator_desc_ldo(11), | |
889 | regulator_desc_ldo(12), | |
890 | regulator_desc_ldo(13), | |
891 | regulator_desc_ldo(14), | |
892 | regulator_desc_ldo(15), | |
893 | regulator_desc_ldo(16), | |
894 | regulator_desc_ldo(17), | |
895 | regulator_desc_ldo(18), | |
896 | regulator_desc_ldo(21), | |
897 | regulator_desc_buck(1), | |
898 | regulator_desc_buck(2), | |
899 | regulator_desc_buck(3), | |
900 | regulator_desc_buck(4), | |
901 | regulator_desc_buck(5), | |
902 | { | |
903 | .name = "BUCK6", | |
904 | .id = MAX8997_BUCK6, | |
905 | .ops = &max8997_fixedvolt_ops, | |
906 | .type = REGULATOR_VOLTAGE, | |
907 | .owner = THIS_MODULE, | |
908 | }, | |
909 | regulator_desc_buck(7), | |
910 | { | |
911 | .name = "EN32KHz AP", | |
912 | .id = MAX8997_EN32KHZ_AP, | |
913 | .ops = &max8997_fixedvolt_ops, | |
914 | .type = REGULATOR_VOLTAGE, | |
915 | .owner = THIS_MODULE, | |
916 | }, { | |
917 | .name = "EN32KHz CP", | |
918 | .id = MAX8997_EN32KHZ_CP, | |
919 | .ops = &max8997_fixedvolt_ops, | |
920 | .type = REGULATOR_VOLTAGE, | |
921 | .owner = THIS_MODULE, | |
922 | }, { | |
923 | .name = "ENVICHG", | |
924 | .id = MAX8997_ENVICHG, | |
925 | .ops = &max8997_fixedvolt_ops, | |
926 | .type = REGULATOR_VOLTAGE, | |
927 | .owner = THIS_MODULE, | |
928 | }, { | |
929 | .name = "ESAFEOUT1", | |
930 | .id = MAX8997_ESAFEOUT1, | |
931 | .ops = &max8997_safeout_ops, | |
932 | .type = REGULATOR_VOLTAGE, | |
933 | .owner = THIS_MODULE, | |
934 | }, { | |
935 | .name = "ESAFEOUT2", | |
936 | .id = MAX8997_ESAFEOUT2, | |
937 | .ops = &max8997_safeout_ops, | |
938 | .type = REGULATOR_VOLTAGE, | |
939 | .owner = THIS_MODULE, | |
940 | }, { | |
941 | .name = "CHARGER CV", | |
942 | .id = MAX8997_CHARGER_CV, | |
943 | .ops = &max8997_fixedstate_ops, | |
944 | .type = REGULATOR_VOLTAGE, | |
945 | .owner = THIS_MODULE, | |
946 | }, { | |
947 | .name = "CHARGER", | |
948 | .id = MAX8997_CHARGER, | |
949 | .ops = &max8997_charger_ops, | |
950 | .type = REGULATOR_CURRENT, | |
951 | .owner = THIS_MODULE, | |
952 | }, { | |
953 | .name = "CHARGER TOPOFF", | |
954 | .id = MAX8997_CHARGER_TOPOFF, | |
955 | .ops = &max8997_charger_fixedstate_ops, | |
956 | .type = REGULATOR_CURRENT, | |
957 | .owner = THIS_MODULE, | |
958 | }, | |
959 | }; | |
960 | ||
961 | static __devinit int max8997_pmic_probe(struct platform_device *pdev) | |
962 | { | |
963 | struct max8997_dev *iodev = dev_get_drvdata(pdev->dev.parent); | |
964 | struct max8997_platform_data *pdata = dev_get_platdata(iodev->dev); | |
965 | struct regulator_dev **rdev; | |
966 | struct max8997_data *max8997; | |
967 | struct i2c_client *i2c; | |
968 | int i, ret, size; | |
969 | u8 max_buck1 = 0, max_buck2 = 0, max_buck5 = 0; | |
970 | ||
971 | if (!pdata) { | |
972 | dev_err(pdev->dev.parent, "No platform init data supplied.\n"); | |
973 | return -ENODEV; | |
974 | } | |
975 | ||
976 | max8997 = kzalloc(sizeof(struct max8997_data), GFP_KERNEL); | |
977 | if (!max8997) | |
978 | return -ENOMEM; | |
979 | ||
980 | size = sizeof(struct regulator_dev *) * pdata->num_regulators; | |
981 | max8997->rdev = kzalloc(size, GFP_KERNEL); | |
982 | if (!max8997->rdev) { | |
983 | kfree(max8997); | |
984 | return -ENOMEM; | |
985 | } | |
986 | ||
987 | rdev = max8997->rdev; | |
988 | max8997->dev = &pdev->dev; | |
989 | max8997->iodev = iodev; | |
990 | max8997->num_regulators = pdata->num_regulators; | |
991 | platform_set_drvdata(pdev, max8997); | |
992 | i2c = max8997->iodev->i2c; | |
993 | ||
994 | max8997->buck125_gpioindex = pdata->buck125_default_idx; | |
6e0414a5 MH |
995 | max8997->buck1_gpiodvs = pdata->buck1_gpiodvs; |
996 | max8997->buck2_gpiodvs = pdata->buck2_gpiodvs; | |
997 | max8997->buck5_gpiodvs = pdata->buck5_gpiodvs; | |
998 | memcpy(max8997->buck125_gpios, pdata->buck125_gpios, sizeof(int) * 3); | |
999 | max8997->ignore_gpiodvs_side_effect = pdata->ignore_gpiodvs_side_effect; | |
bd6ca2cf MH |
1000 | |
1001 | for (i = 0; i < 8; i++) { | |
1002 | max8997->buck1_vol[i] = ret = | |
1003 | max8997_get_voltage_proper_val( | |
1004 | &buck1245_voltage_map_desc, | |
1005 | pdata->buck1_voltage[i] / 1000, | |
1006 | pdata->buck1_voltage[i] / 1000 + | |
1007 | buck1245_voltage_map_desc.step); | |
1008 | if (ret < 0) | |
1009 | goto err_alloc; | |
1010 | ||
1011 | max8997->buck2_vol[i] = ret = | |
1012 | max8997_get_voltage_proper_val( | |
1013 | &buck1245_voltage_map_desc, | |
1014 | pdata->buck2_voltage[i] / 1000, | |
1015 | pdata->buck2_voltage[i] / 1000 + | |
1016 | buck1245_voltage_map_desc.step); | |
1017 | if (ret < 0) | |
1018 | goto err_alloc; | |
1019 | ||
1020 | max8997->buck5_vol[i] = ret = | |
1021 | max8997_get_voltage_proper_val( | |
1022 | &buck1245_voltage_map_desc, | |
1023 | pdata->buck5_voltage[i] / 1000, | |
1024 | pdata->buck5_voltage[i] / 1000 + | |
1025 | buck1245_voltage_map_desc.step); | |
1026 | if (ret < 0) | |
1027 | goto err_alloc; | |
1028 | ||
1029 | if (max_buck1 < max8997->buck1_vol[i]) | |
1030 | max_buck1 = max8997->buck1_vol[i]; | |
1031 | if (max_buck2 < max8997->buck2_vol[i]) | |
1032 | max_buck2 = max8997->buck2_vol[i]; | |
1033 | if (max_buck5 < max8997->buck5_vol[i]) | |
1034 | max_buck5 = max8997->buck5_vol[i]; | |
1035 | } | |
1036 | ||
1037 | /* For the safety, set max voltage before setting up */ | |
1038 | for (i = 0; i < 8; i++) { | |
ecb9c4f5 | 1039 | max8997_update_reg(i2c, MAX8997_REG_BUCK1DVS1 + i, |
bd6ca2cf | 1040 | max_buck1, 0x3f); |
ecb9c4f5 | 1041 | max8997_update_reg(i2c, MAX8997_REG_BUCK2DVS1 + i, |
bd6ca2cf | 1042 | max_buck2, 0x3f); |
ecb9c4f5 | 1043 | max8997_update_reg(i2c, MAX8997_REG_BUCK5DVS1 + i, |
bd6ca2cf MH |
1044 | max_buck5, 0x3f); |
1045 | } | |
1046 | ||
1047 | /* | |
1048 | * If buck 1, 2, and 5 do not care DVS GPIO settings, ignore them. | |
1049 | * If at least one of them cares, set gpios. | |
1050 | */ | |
1051 | if (pdata->buck1_gpiodvs || pdata->buck2_gpiodvs || | |
1052 | pdata->buck5_gpiodvs) { | |
1053 | bool gpio1set = false, gpio2set = false; | |
1054 | ||
1055 | if (!gpio_is_valid(pdata->buck125_gpios[0]) || | |
1056 | !gpio_is_valid(pdata->buck125_gpios[1]) || | |
1057 | !gpio_is_valid(pdata->buck125_gpios[2])) { | |
1058 | dev_err(&pdev->dev, "GPIO NOT VALID\n"); | |
1059 | ret = -EINVAL; | |
1060 | goto err_alloc; | |
1061 | } | |
1062 | ||
1063 | ret = gpio_request(pdata->buck125_gpios[0], | |
1064 | "MAX8997 SET1"); | |
1065 | if (ret == -EBUSY) | |
1066 | dev_warn(&pdev->dev, "Duplicated gpio request" | |
1067 | " on SET1\n"); | |
1068 | else if (ret) | |
1069 | goto err_alloc; | |
1070 | else | |
1071 | gpio1set = true; | |
1072 | ||
1073 | ret = gpio_request(pdata->buck125_gpios[1], | |
1074 | "MAX8997 SET2"); | |
1075 | if (ret == -EBUSY) | |
1076 | dev_warn(&pdev->dev, "Duplicated gpio request" | |
1077 | " on SET2\n"); | |
1078 | else if (ret) { | |
1079 | if (gpio1set) | |
1080 | gpio_free(pdata->buck125_gpios[0]); | |
1081 | goto err_alloc; | |
1082 | } else | |
1083 | gpio2set = true; | |
1084 | ||
1085 | ret = gpio_request(pdata->buck125_gpios[2], | |
1086 | "MAX8997 SET3"); | |
1087 | if (ret == -EBUSY) | |
1088 | dev_warn(&pdev->dev, "Duplicated gpio request" | |
1089 | " on SET3\n"); | |
1090 | else if (ret) { | |
1091 | if (gpio1set) | |
1092 | gpio_free(pdata->buck125_gpios[0]); | |
1093 | if (gpio2set) | |
1094 | gpio_free(pdata->buck125_gpios[1]); | |
1095 | goto err_alloc; | |
1096 | } | |
1097 | ||
1098 | gpio_direction_output(pdata->buck125_gpios[0], | |
1099 | (max8997->buck125_gpioindex >> 2) | |
1100 | & 0x1); /* SET1 */ | |
1101 | gpio_direction_output(pdata->buck125_gpios[1], | |
1102 | (max8997->buck125_gpioindex >> 1) | |
1103 | & 0x1); /* SET2 */ | |
1104 | gpio_direction_output(pdata->buck125_gpios[2], | |
1105 | (max8997->buck125_gpioindex >> 0) | |
1106 | & 0x1); /* SET3 */ | |
1107 | ret = 0; | |
1108 | } | |
1109 | ||
1110 | /* DVS-GPIO disabled */ | |
1111 | max8997_update_reg(i2c, MAX8997_REG_BUCK1CTRL, (pdata->buck1_gpiodvs) ? | |
1112 | (1 << 1) : (0 << 1), 1 << 1); | |
1113 | max8997_update_reg(i2c, MAX8997_REG_BUCK2CTRL, (pdata->buck2_gpiodvs) ? | |
1114 | (1 << 1) : (0 << 1), 1 << 1); | |
1115 | max8997_update_reg(i2c, MAX8997_REG_BUCK5CTRL, (pdata->buck5_gpiodvs) ? | |
1116 | (1 << 1) : (0 << 1), 1 << 1); | |
1117 | ||
1118 | /* Initialize all the DVS related BUCK registers */ | |
1119 | for (i = 0; i < 8; i++) { | |
ecb9c4f5 | 1120 | max8997_update_reg(i2c, MAX8997_REG_BUCK1DVS1 + i, |
bd6ca2cf MH |
1121 | max8997->buck1_vol[i], |
1122 | 0x3f); | |
ecb9c4f5 | 1123 | max8997_update_reg(i2c, MAX8997_REG_BUCK2DVS1 + i, |
bd6ca2cf MH |
1124 | max8997->buck2_vol[i], |
1125 | 0x3f); | |
ecb9c4f5 | 1126 | max8997_update_reg(i2c, MAX8997_REG_BUCK5DVS1 + i, |
bd6ca2cf MH |
1127 | max8997->buck5_vol[i], |
1128 | 0x3f); | |
1129 | } | |
1130 | ||
dbb48e7c TB |
1131 | /* Misc Settings */ |
1132 | max8997->ramp_delay = 10; /* set 10mV/us, which is the default */ | |
1133 | max8997_write_reg(i2c, MAX8997_REG_BUCKRAMP, (0xf << 4) | 0x9); | |
1134 | ||
bd6ca2cf MH |
1135 | for (i = 0; i < pdata->num_regulators; i++) { |
1136 | const struct voltage_map_desc *desc; | |
1137 | int id = pdata->regulators[i].id; | |
1138 | ||
1139 | desc = reg_voltage_map[id]; | |
1140 | if (desc) | |
1141 | regulators[id].n_voltages = | |
1142 | (desc->max - desc->min) / desc->step + 1; | |
1143 | else if (id == MAX8997_ESAFEOUT1 || id == MAX8997_ESAFEOUT2) | |
1144 | regulators[id].n_voltages = 4; | |
1145 | else if (id == MAX8997_CHARGER_CV) | |
1146 | regulators[id].n_voltages = 16; | |
1147 | ||
1148 | rdev[i] = regulator_register(®ulators[id], max8997->dev, | |
2c043bcb | 1149 | pdata->regulators[i].initdata, max8997, NULL); |
bd6ca2cf MH |
1150 | if (IS_ERR(rdev[i])) { |
1151 | ret = PTR_ERR(rdev[i]); | |
1152 | dev_err(max8997->dev, "regulator init failed for %d\n", | |
1153 | id); | |
1154 | rdev[i] = NULL; | |
1155 | goto err; | |
1156 | } | |
1157 | } | |
1158 | ||
bd6ca2cf MH |
1159 | return 0; |
1160 | err: | |
1161 | for (i = 0; i < max8997->num_regulators; i++) | |
1162 | if (rdev[i]) | |
1163 | regulator_unregister(rdev[i]); | |
1164 | err_alloc: | |
1165 | kfree(max8997->rdev); | |
1166 | kfree(max8997); | |
1167 | ||
1168 | return ret; | |
1169 | } | |
1170 | ||
1171 | static int __devexit max8997_pmic_remove(struct platform_device *pdev) | |
1172 | { | |
1173 | struct max8997_data *max8997 = platform_get_drvdata(pdev); | |
1174 | struct regulator_dev **rdev = max8997->rdev; | |
1175 | int i; | |
1176 | ||
1177 | for (i = 0; i < max8997->num_regulators; i++) | |
1178 | if (rdev[i]) | |
1179 | regulator_unregister(rdev[i]); | |
1180 | ||
1181 | kfree(max8997->rdev); | |
1182 | kfree(max8997); | |
1183 | ||
1184 | return 0; | |
1185 | } | |
1186 | ||
1187 | static const struct platform_device_id max8997_pmic_id[] = { | |
1188 | { "max8997-pmic", 0}, | |
1189 | { }, | |
1190 | }; | |
a51b907b | 1191 | MODULE_DEVICE_TABLE(platform, max8997_pmic_id); |
bd6ca2cf MH |
1192 | |
1193 | static struct platform_driver max8997_pmic_driver = { | |
1194 | .driver = { | |
1195 | .name = "max8997-pmic", | |
1196 | .owner = THIS_MODULE, | |
1197 | }, | |
1198 | .probe = max8997_pmic_probe, | |
1199 | .remove = __devexit_p(max8997_pmic_remove), | |
1200 | .id_table = max8997_pmic_id, | |
1201 | }; | |
1202 | ||
1203 | static int __init max8997_pmic_init(void) | |
1204 | { | |
1205 | return platform_driver_register(&max8997_pmic_driver); | |
1206 | } | |
1207 | subsys_initcall(max8997_pmic_init); | |
1208 | ||
1209 | static void __exit max8997_pmic_cleanup(void) | |
1210 | { | |
1211 | platform_driver_unregister(&max8997_pmic_driver); | |
1212 | } | |
1213 | module_exit(max8997_pmic_cleanup); | |
1214 | ||
1215 | MODULE_DESCRIPTION("MAXIM 8997/8966 Regulator Driver"); | |
1216 | MODULE_AUTHOR("MyungJoo Ham <myungjoo.ham@samsung.com>"); | |
1217 | MODULE_LICENSE("GPL"); |