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Ashish Jangam08bf1c02011-12-09 19:48:20 +05301/*
2* da9052-regulator.c: Regulator driver for DA9052
3*
4* Copyright(c) 2011 Dialog Semiconductor Ltd.
5*
6* Author: David Dajun Chen <dchen@diasemi.com>
7*
8* This program is free software; you can redistribute it and/or modify
9* it under the terms of the GNU General Public License as published by
10* the Free Software Foundation; either version 2 of the License, or
11* (at your option) any later version.
12*
13*/
14
15#include <linux/module.h>
16#include <linux/moduleparam.h>
17#include <linux/init.h>
18#include <linux/err.h>
19#include <linux/platform_device.h>
20#include <linux/regulator/driver.h>
21#include <linux/regulator/machine.h>
Ying-Chun Liu (PaulLiu)88c84c12012-04-13 21:37:41 +080022#ifdef CONFIG_OF
Mark Browncd22a962012-04-16 09:54:24 +010023#include <linux/of.h>
Ying-Chun Liu (PaulLiu)88c84c12012-04-13 21:37:41 +080024#include <linux/regulator/of_regulator.h>
25#endif
Ashish Jangam08bf1c02011-12-09 19:48:20 +053026
27#include <linux/mfd/da9052/da9052.h>
28#include <linux/mfd/da9052/reg.h>
29#include <linux/mfd/da9052/pdata.h>
30
31/* Buck step size */
32#define DA9052_BUCK_PERI_3uV_STEP 100000
33#define DA9052_BUCK_PERI_REG_MAP_UPTO_3uV 24
34#define DA9052_CONST_3uV 3000000
35
36#define DA9052_MIN_UA 0
37#define DA9052_MAX_UA 3
38#define DA9052_CURRENT_RANGE 4
39
40/* Bit masks */
41#define DA9052_BUCK_ILIM_MASK_EVEN 0x0c
42#define DA9052_BUCK_ILIM_MASK_ODD 0xc0
43
Axel Lin9210f052012-03-15 19:58:39 +080044/* DA9052 REGULATOR IDs */
45#define DA9052_ID_BUCK1 0
46#define DA9052_ID_BUCK2 1
47#define DA9052_ID_BUCK3 2
48#define DA9052_ID_BUCK4 3
49#define DA9052_ID_LDO1 4
50#define DA9052_ID_LDO2 5
51#define DA9052_ID_LDO3 6
52#define DA9052_ID_LDO4 7
53#define DA9052_ID_LDO5 8
54#define DA9052_ID_LDO6 9
55#define DA9052_ID_LDO7 10
56#define DA9052_ID_LDO8 11
57#define DA9052_ID_LDO9 12
58#define DA9052_ID_LDO10 13
59
Ashish Jangam08bf1c02011-12-09 19:48:20 +053060static const u32 da9052_current_limits[3][4] = {
61 {700000, 800000, 1000000, 1200000}, /* DA9052-BC BUCKs */
62 {1600000, 2000000, 2400000, 3000000}, /* DA9053-AA/Bx BUCK-CORE */
63 {800000, 1000000, 1200000, 1500000}, /* DA9053-AA/Bx BUCK-PRO,
64 * BUCK-MEM and BUCK-PERI
65 */
66};
67
68struct da9052_regulator_info {
69 struct regulator_desc reg_desc;
70 int step_uV;
71 int min_uV;
72 int max_uV;
Axel Lind706b1e2013-10-16 17:33:59 +080073 unsigned char activate_bit;
Ashish Jangam08bf1c02011-12-09 19:48:20 +053074};
75
76struct da9052_regulator {
77 struct da9052 *da9052;
78 struct da9052_regulator_info *info;
79 struct regulator_dev *rdev;
80};
81
82static int verify_range(struct da9052_regulator_info *info,
83 int min_uV, int max_uV)
84{
85 if (min_uV > info->max_uV || max_uV < info->min_uV)
86 return -EINVAL;
87
88 return 0;
89}
90
Ashish Jangam08bf1c02011-12-09 19:48:20 +053091static int da9052_dcdc_get_current_limit(struct regulator_dev *rdev)
92{
93 struct da9052_regulator *regulator = rdev_get_drvdata(rdev);
94 int offset = rdev_get_id(rdev);
95 int ret, row = 2;
96
97 ret = da9052_reg_read(regulator->da9052, DA9052_BUCKA_REG + offset/2);
98 if (ret < 0)
99 return ret;
100
101 /* Determine the even or odd position of the buck current limit
102 * register field
103 */
104 if (offset % 2 == 0)
105 ret = (ret & DA9052_BUCK_ILIM_MASK_EVEN) >> 2;
106 else
107 ret = (ret & DA9052_BUCK_ILIM_MASK_ODD) >> 6;
108
109 /* Select the appropriate current limit range */
110 if (regulator->da9052->chip_id == DA9052)
111 row = 0;
112 else if (offset == 0)
113 row = 1;
114
115 return da9052_current_limits[row][ret];
116}
117
118static int da9052_dcdc_set_current_limit(struct regulator_dev *rdev, int min_uA,
119 int max_uA)
120{
121 struct da9052_regulator *regulator = rdev_get_drvdata(rdev);
122 int offset = rdev_get_id(rdev);
123 int reg_val = 0;
124 int i, row = 2;
125
126 /* Select the appropriate current limit range */
127 if (regulator->da9052->chip_id == DA9052)
128 row = 0;
129 else if (offset == 0)
130 row = 1;
131
Axel Lin19d23c22012-08-08 20:23:54 +0800132 for (i = DA9052_CURRENT_RANGE - 1; i >= 0; i--) {
Axel Lin1e369bc2012-11-26 15:23:38 +0800133 if ((min_uA <= da9052_current_limits[row][i]) &&
134 (da9052_current_limits[row][i] <= max_uA)) {
Ashish Jangam08bf1c02011-12-09 19:48:20 +0530135 reg_val = i;
136 break;
137 }
138 }
139
Axel Lin1e369bc2012-11-26 15:23:38 +0800140 if (i < 0)
141 return -EINVAL;
142
Ashish Jangam08bf1c02011-12-09 19:48:20 +0530143 /* Determine the even or odd position of the buck current limit
144 * register field
145 */
146 if (offset % 2 == 0)
147 return da9052_reg_update(regulator->da9052,
148 DA9052_BUCKA_REG + offset/2,
149 DA9052_BUCK_ILIM_MASK_EVEN,
150 reg_val << 2);
151 else
152 return da9052_reg_update(regulator->da9052,
153 DA9052_BUCKA_REG + offset/2,
154 DA9052_BUCK_ILIM_MASK_ODD,
155 reg_val << 6);
156}
157
Ashish Jangam08bf1c02011-12-09 19:48:20 +0530158static int da9052_list_voltage(struct regulator_dev *rdev,
159 unsigned int selector)
160{
161 struct da9052_regulator *regulator = rdev_get_drvdata(rdev);
162 struct da9052_regulator_info *info = regulator->info;
Axel Lin0ec446e2012-03-15 20:00:07 +0800163 int id = rdev_get_id(rdev);
Ashish Jangam08bf1c02011-12-09 19:48:20 +0530164 int volt_uV;
165
Axel Lin0ec446e2012-03-15 20:00:07 +0800166 if ((id == DA9052_ID_BUCK4) && (regulator->da9052->chip_id == DA9052)
167 && (selector >= DA9052_BUCK_PERI_REG_MAP_UPTO_3uV)) {
168 volt_uV = ((DA9052_BUCK_PERI_REG_MAP_UPTO_3uV * info->step_uV)
169 + info->min_uV);
170 volt_uV += (selector - DA9052_BUCK_PERI_REG_MAP_UPTO_3uV)
171 * (DA9052_BUCK_PERI_3uV_STEP);
172 } else {
173 volt_uV = (selector * info->step_uV) + info->min_uV;
174 }
Ashish Jangam08bf1c02011-12-09 19:48:20 +0530175
176 if (volt_uV > info->max_uV)
177 return -EINVAL;
178
179 return volt_uV;
180}
181
Axel Lin4923b48b2012-05-16 13:12:35 +0800182static int da9052_map_voltage(struct regulator_dev *rdev,
183 int min_uV, int max_uV)
Ashish Jangam08bf1c02011-12-09 19:48:20 +0530184{
185 struct da9052_regulator *regulator = rdev_get_drvdata(rdev);
186 struct da9052_regulator_info *info = regulator->info;
Axel Lin0ec446e2012-03-15 20:00:07 +0800187 int id = rdev_get_id(rdev);
Axel Lin4923b48b2012-05-16 13:12:35 +0800188 int ret, sel;
Ashish Jangam08bf1c02011-12-09 19:48:20 +0530189
190 ret = verify_range(info, min_uV, max_uV);
191 if (ret < 0)
192 return ret;
193
194 if (min_uV < info->min_uV)
195 min_uV = info->min_uV;
196
Axel Lin0ec446e2012-03-15 20:00:07 +0800197 if ((id == DA9052_ID_BUCK4) && (regulator->da9052->chip_id == DA9052)
198 && (min_uV >= DA9052_CONST_3uV)) {
Axel Lin4923b48b2012-05-16 13:12:35 +0800199 sel = DA9052_BUCK_PERI_REG_MAP_UPTO_3uV +
200 DIV_ROUND_UP(min_uV - DA9052_CONST_3uV,
201 DA9052_BUCK_PERI_3uV_STEP);
Axel Lin0ec446e2012-03-15 20:00:07 +0800202 } else {
Axel Lin4923b48b2012-05-16 13:12:35 +0800203 sel = DIV_ROUND_UP(min_uV - info->min_uV, info->step_uV);
Axel Lin0ec446e2012-03-15 20:00:07 +0800204 }
Ashish Jangam08bf1c02011-12-09 19:48:20 +0530205
Axel Lin4923b48b2012-05-16 13:12:35 +0800206 ret = da9052_list_voltage(rdev, sel);
Ashish Jangam08bf1c02011-12-09 19:48:20 +0530207 if (ret < 0)
208 return ret;
209
Axel Lin4923b48b2012-05-16 13:12:35 +0800210 return sel;
211}
212
Axel Lind706b1e2013-10-16 17:33:59 +0800213static int da9052_regulator_set_voltage_sel(struct regulator_dev *rdev,
214 unsigned int selector)
215{
216 struct da9052_regulator *regulator = rdev_get_drvdata(rdev);
217 struct da9052_regulator_info *info = regulator->info;
218 int id = rdev_get_id(rdev);
219 int ret;
220
221 ret = da9052_reg_update(regulator->da9052, rdev->desc->vsel_reg,
222 rdev->desc->vsel_mask, selector);
223 if (ret < 0)
224 return ret;
225
226 /* Some LDOs and DCDCs are DVC controlled which requires enabling of
227 * the activate bit to implment the changes on the output.
228 */
229 switch (id) {
230 case DA9052_ID_BUCK1:
231 case DA9052_ID_BUCK2:
232 case DA9052_ID_BUCK3:
233 case DA9052_ID_LDO2:
234 case DA9052_ID_LDO3:
235 ret = da9052_reg_update(regulator->da9052, DA9052_SUPPLY_REG,
236 info->activate_bit, info->activate_bit);
237 break;
238 }
239
240 return ret;
241}
242
Philipp Zabel5c99a7b2014-02-06 15:35:21 +0100243static int da9052_regulator_set_voltage_time_sel(struct regulator_dev *rdev,
244 unsigned int old_sel,
245 unsigned int new_sel)
246{
247 struct da9052_regulator *regulator = rdev_get_drvdata(rdev);
248 struct da9052_regulator_info *info = regulator->info;
249 int id = rdev_get_id(rdev);
250 int ret = 0;
251
252 /* The DVC controlled LDOs and DCDCs ramp with 6.25mV/µs after enabling
253 * the activate bit.
254 */
255 switch (id) {
256 case DA9052_ID_BUCK1:
257 case DA9052_ID_BUCK2:
258 case DA9052_ID_BUCK3:
259 case DA9052_ID_LDO2:
260 case DA9052_ID_LDO3:
261 ret = (new_sel - old_sel) * info->step_uV / 6250;
262 break;
263 }
264
265 return ret;
266}
267
Ashish Jangam08bf1c02011-12-09 19:48:20 +0530268static struct regulator_ops da9052_dcdc_ops = {
Ashish Jangam08bf1c02011-12-09 19:48:20 +0530269 .get_current_limit = da9052_dcdc_get_current_limit,
270 .set_current_limit = da9052_dcdc_set_current_limit,
271
272 .list_voltage = da9052_list_voltage,
Axel Lin4923b48b2012-05-16 13:12:35 +0800273 .map_voltage = da9052_map_voltage,
Axel Lin09812bc2012-04-24 09:54:38 +0800274 .get_voltage_sel = regulator_get_voltage_sel_regmap,
Axel Lind706b1e2013-10-16 17:33:59 +0800275 .set_voltage_sel = da9052_regulator_set_voltage_sel,
Philipp Zabel5c99a7b2014-02-06 15:35:21 +0100276 .set_voltage_time_sel = da9052_regulator_set_voltage_time_sel,
Axel Lin0d481f72012-04-17 11:34:32 +0800277 .is_enabled = regulator_is_enabled_regmap,
278 .enable = regulator_enable_regmap,
279 .disable = regulator_disable_regmap,
Ashish Jangam08bf1c02011-12-09 19:48:20 +0530280};
281
Ashish Jangam08bf1c02011-12-09 19:48:20 +0530282static struct regulator_ops da9052_ldo_ops = {
Ashish Jangam08bf1c02011-12-09 19:48:20 +0530283 .list_voltage = da9052_list_voltage,
Axel Lin4923b48b2012-05-16 13:12:35 +0800284 .map_voltage = da9052_map_voltage,
Axel Lin09812bc2012-04-24 09:54:38 +0800285 .get_voltage_sel = regulator_get_voltage_sel_regmap,
Axel Lind706b1e2013-10-16 17:33:59 +0800286 .set_voltage_sel = da9052_regulator_set_voltage_sel,
Philipp Zabel5c99a7b2014-02-06 15:35:21 +0100287 .set_voltage_time_sel = da9052_regulator_set_voltage_time_sel,
Axel Lin0d481f72012-04-17 11:34:32 +0800288 .is_enabled = regulator_is_enabled_regmap,
289 .enable = regulator_enable_regmap,
290 .disable = regulator_disable_regmap,
Ashish Jangam08bf1c02011-12-09 19:48:20 +0530291};
292
Ashish Jangam08bf1c02011-12-09 19:48:20 +0530293#define DA9052_LDO(_id, step, min, max, sbits, ebits, abits) \
294{\
295 .reg_desc = {\
Axel Lin9210f052012-03-15 19:58:39 +0800296 .name = #_id,\
Ashish Jangam08bf1c02011-12-09 19:48:20 +0530297 .ops = &da9052_ldo_ops,\
298 .type = REGULATOR_VOLTAGE,\
Axel Lin9210f052012-03-15 19:58:39 +0800299 .id = DA9052_ID_##_id,\
Axel Lin7b957652012-03-05 20:04:32 +0800300 .n_voltages = (max - min) / step + 1, \
Ashish Jangam08bf1c02011-12-09 19:48:20 +0530301 .owner = THIS_MODULE,\
Axel Lin09812bc2012-04-24 09:54:38 +0800302 .vsel_reg = DA9052_BUCKCORE_REG + DA9052_ID_##_id, \
303 .vsel_mask = (1 << (sbits)) - 1,\
Axel Lin0d481f72012-04-17 11:34:32 +0800304 .enable_reg = DA9052_BUCKCORE_REG + DA9052_ID_##_id, \
305 .enable_mask = 1 << (ebits),\
Ashish Jangam08bf1c02011-12-09 19:48:20 +0530306 },\
307 .min_uV = (min) * 1000,\
308 .max_uV = (max) * 1000,\
309 .step_uV = (step) * 1000,\
Axel Lind706b1e2013-10-16 17:33:59 +0800310 .activate_bit = (abits),\
Ashish Jangam08bf1c02011-12-09 19:48:20 +0530311}
312
313#define DA9052_DCDC(_id, step, min, max, sbits, ebits, abits) \
314{\
315 .reg_desc = {\
Axel Lin9210f052012-03-15 19:58:39 +0800316 .name = #_id,\
Ashish Jangam08bf1c02011-12-09 19:48:20 +0530317 .ops = &da9052_dcdc_ops,\
318 .type = REGULATOR_VOLTAGE,\
Axel Lin9210f052012-03-15 19:58:39 +0800319 .id = DA9052_ID_##_id,\
Axel Lin7b957652012-03-05 20:04:32 +0800320 .n_voltages = (max - min) / step + 1, \
Ashish Jangam08bf1c02011-12-09 19:48:20 +0530321 .owner = THIS_MODULE,\
Axel Lin09812bc2012-04-24 09:54:38 +0800322 .vsel_reg = DA9052_BUCKCORE_REG + DA9052_ID_##_id, \
323 .vsel_mask = (1 << (sbits)) - 1,\
Axel Lin0d481f72012-04-17 11:34:32 +0800324 .enable_reg = DA9052_BUCKCORE_REG + DA9052_ID_##_id, \
325 .enable_mask = 1 << (ebits),\
Ashish Jangam08bf1c02011-12-09 19:48:20 +0530326 },\
327 .min_uV = (min) * 1000,\
328 .max_uV = (max) * 1000,\
329 .step_uV = (step) * 1000,\
Axel Lind706b1e2013-10-16 17:33:59 +0800330 .activate_bit = (abits),\
Ashish Jangam08bf1c02011-12-09 19:48:20 +0530331}
332
Axel Lin6242eae2011-12-20 17:12:00 +0800333static struct da9052_regulator_info da9052_regulator_info[] = {
Axel Lin9210f052012-03-15 19:58:39 +0800334 DA9052_DCDC(BUCK1, 25, 500, 2075, 6, 6, DA9052_SUPPLY_VBCOREGO),
335 DA9052_DCDC(BUCK2, 25, 500, 2075, 6, 6, DA9052_SUPPLY_VBPROGO),
336 DA9052_DCDC(BUCK3, 25, 925, 2500, 6, 6, DA9052_SUPPLY_VBMEMGO),
Axel Lin0ec446e2012-03-15 20:00:07 +0800337 DA9052_DCDC(BUCK4, 50, 1800, 3600, 5, 6, 0),
Axel Lin9210f052012-03-15 19:58:39 +0800338 DA9052_LDO(LDO1, 50, 600, 1800, 5, 6, 0),
Axel Lin0ec446e2012-03-15 20:00:07 +0800339 DA9052_LDO(LDO2, 25, 600, 1800, 6, 6, DA9052_SUPPLY_VLDO2GO),
340 DA9052_LDO(LDO3, 25, 1725, 3300, 6, 6, DA9052_SUPPLY_VLDO3GO),
Axel Lin9210f052012-03-15 19:58:39 +0800341 DA9052_LDO(LDO4, 25, 1725, 3300, 6, 6, 0),
342 DA9052_LDO(LDO5, 50, 1200, 3600, 6, 6, 0),
343 DA9052_LDO(LDO6, 50, 1200, 3600, 6, 6, 0),
344 DA9052_LDO(LDO7, 50, 1200, 3600, 6, 6, 0),
345 DA9052_LDO(LDO8, 50, 1200, 3600, 6, 6, 0),
346 DA9052_LDO(LDO9, 50, 1250, 3650, 6, 6, 0),
347 DA9052_LDO(LDO10, 50, 1200, 3600, 6, 6, 0),
Ashish Jangam08bf1c02011-12-09 19:48:20 +0530348};
349
Axel Lin6242eae2011-12-20 17:12:00 +0800350static struct da9052_regulator_info da9053_regulator_info[] = {
Axel Lin9210f052012-03-15 19:58:39 +0800351 DA9052_DCDC(BUCK1, 25, 500, 2075, 6, 6, DA9052_SUPPLY_VBCOREGO),
352 DA9052_DCDC(BUCK2, 25, 500, 2075, 6, 6, DA9052_SUPPLY_VBPROGO),
353 DA9052_DCDC(BUCK3, 25, 925, 2500, 6, 6, DA9052_SUPPLY_VBMEMGO),
Axel Lin0ec446e2012-03-15 20:00:07 +0800354 DA9052_DCDC(BUCK4, 25, 925, 2500, 6, 6, 0),
Axel Lin9210f052012-03-15 19:58:39 +0800355 DA9052_LDO(LDO1, 50, 600, 1800, 5, 6, 0),
Axel Lin0ec446e2012-03-15 20:00:07 +0800356 DA9052_LDO(LDO2, 25, 600, 1800, 6, 6, DA9052_SUPPLY_VLDO2GO),
357 DA9052_LDO(LDO3, 25, 1725, 3300, 6, 6, DA9052_SUPPLY_VLDO3GO),
Axel Lin9210f052012-03-15 19:58:39 +0800358 DA9052_LDO(LDO4, 25, 1725, 3300, 6, 6, 0),
359 DA9052_LDO(LDO5, 50, 1200, 3600, 6, 6, 0),
360 DA9052_LDO(LDO6, 50, 1200, 3600, 6, 6, 0),
361 DA9052_LDO(LDO7, 50, 1200, 3600, 6, 6, 0),
362 DA9052_LDO(LDO8, 50, 1200, 3600, 6, 6, 0),
363 DA9052_LDO(LDO9, 50, 1250, 3650, 6, 6, 0),
364 DA9052_LDO(LDO10, 50, 1200, 3600, 6, 6, 0),
Ashish Jangam08bf1c02011-12-09 19:48:20 +0530365};
366
367static inline struct da9052_regulator_info *find_regulator_info(u8 chip_id,
368 int id)
369{
370 struct da9052_regulator_info *info;
371 int i;
372
Ashish Jangam984b5a62011-12-15 18:59:53 +0530373 switch (chip_id) {
374 case DA9052:
Ashish Jangam08bf1c02011-12-09 19:48:20 +0530375 for (i = 0; i < ARRAY_SIZE(da9052_regulator_info); i++) {
376 info = &da9052_regulator_info[i];
377 if (info->reg_desc.id == id)
378 return info;
379 }
Ashish Jangam984b5a62011-12-15 18:59:53 +0530380 break;
381 case DA9053_AA:
382 case DA9053_BA:
383 case DA9053_BB:
Ashish Jangam08bf1c02011-12-09 19:48:20 +0530384 for (i = 0; i < ARRAY_SIZE(da9053_regulator_info); i++) {
385 info = &da9053_regulator_info[i];
386 if (info->reg_desc.id == id)
387 return info;
388 }
Ashish Jangam984b5a62011-12-15 18:59:53 +0530389 break;
Ashish Jangam08bf1c02011-12-09 19:48:20 +0530390 }
391
392 return NULL;
393}
394
Bill Pembertona5023572012-11-19 13:22:22 -0500395static int da9052_regulator_probe(struct platform_device *pdev)
Ashish Jangam08bf1c02011-12-09 19:48:20 +0530396{
Mark Brownc1727082012-04-04 00:50:22 +0100397 struct regulator_config config = { };
Ashish Jangam08bf1c02011-12-09 19:48:20 +0530398 struct da9052_regulator *regulator;
399 struct da9052 *da9052;
400 struct da9052_pdata *pdata;
Ashish Jangam08bf1c02011-12-09 19:48:20 +0530401
Ashish Jangam984b5a62011-12-15 18:59:53 +0530402 regulator = devm_kzalloc(&pdev->dev, sizeof(struct da9052_regulator),
403 GFP_KERNEL);
Ashish Jangam08bf1c02011-12-09 19:48:20 +0530404 if (!regulator)
405 return -ENOMEM;
406
407 da9052 = dev_get_drvdata(pdev->dev.parent);
Jingoo Handff91d02013-07-30 17:20:47 +0900408 pdata = dev_get_platdata(da9052->dev);
Ashish Jangam08bf1c02011-12-09 19:48:20 +0530409 regulator->da9052 = da9052;
410
411 regulator->info = find_regulator_info(regulator->da9052->chip_id,
412 pdev->id);
413 if (regulator->info == NULL) {
414 dev_err(&pdev->dev, "invalid regulator ID specified\n");
Axel Lin7eb64442012-04-05 12:08:58 +0800415 return -EINVAL;
Ashish Jangam08bf1c02011-12-09 19:48:20 +0530416 }
Mark Brownc1727082012-04-04 00:50:22 +0100417
418 config.dev = &pdev->dev;
Mark Brownc1727082012-04-04 00:50:22 +0100419 config.driver_data = regulator;
Axel Lin0d481f72012-04-17 11:34:32 +0800420 config.regmap = da9052->regmap;
Ying-Chun Liu (PaulLiu)88c84c12012-04-13 21:37:41 +0800421 if (pdata && pdata->regulators) {
422 config.init_data = pdata->regulators[pdev->id];
423 } else {
424#ifdef CONFIG_OF
Guodong Xub8b27a42014-09-10 11:50:39 +0800425 struct device_node *nproot = da9052->dev->of_node;
426 struct device_node *np;
Ying-Chun Liu (PaulLiu)88c84c12012-04-13 21:37:41 +0800427
428 if (!nproot)
429 return -ENODEV;
430
Sachin Kamatb327bcc2014-02-14 17:19:56 +0530431 nproot = of_get_child_by_name(nproot, "regulators");
Ying-Chun Liu (PaulLiu)88c84c12012-04-13 21:37:41 +0800432 if (!nproot)
433 return -ENODEV;
434
Axel Linb86bbdd2012-07-07 09:46:45 +0800435 for_each_child_of_node(nproot, np) {
Ying-Chun Liu (PaulLiu)88c84c12012-04-13 21:37:41 +0800436 if (!of_node_cmp(np->name,
437 regulator->info->reg_desc.name)) {
438 config.init_data = of_get_regulator_init_data(
439 &pdev->dev, np);
Axel Line76b9cc2012-07-12 22:23:25 +0800440 config.of_node = np;
Ying-Chun Liu (PaulLiu)88c84c12012-04-13 21:37:41 +0800441 break;
442 }
443 }
Axel Linc92f5dd2013-01-27 21:16:56 +0800444 of_node_put(nproot);
Ying-Chun Liu (PaulLiu)88c84c12012-04-13 21:37:41 +0800445#endif
446 }
Mark Brownc1727082012-04-04 00:50:22 +0100447
Axel Linea49a5e2013-09-03 14:24:46 +0800448 regulator->rdev = devm_regulator_register(&pdev->dev,
449 &regulator->info->reg_desc,
450 &config);
Ashish Jangam08bf1c02011-12-09 19:48:20 +0530451 if (IS_ERR(regulator->rdev)) {
452 dev_err(&pdev->dev, "failed to register regulator %s\n",
453 regulator->info->reg_desc.name);
Axel Lin7eb64442012-04-05 12:08:58 +0800454 return PTR_ERR(regulator->rdev);
Ashish Jangam08bf1c02011-12-09 19:48:20 +0530455 }
456
457 platform_set_drvdata(pdev, regulator);
458
459 return 0;
Ashish Jangam08bf1c02011-12-09 19:48:20 +0530460}
461
Ashish Jangam08bf1c02011-12-09 19:48:20 +0530462static struct platform_driver da9052_regulator_driver = {
463 .probe = da9052_regulator_probe,
Ashish Jangam08bf1c02011-12-09 19:48:20 +0530464 .driver = {
465 .name = "da9052-regulator",
466 .owner = THIS_MODULE,
467 },
468};
469
470static int __init da9052_regulator_init(void)
471{
472 return platform_driver_register(&da9052_regulator_driver);
473}
474subsys_initcall(da9052_regulator_init);
475
476static void __exit da9052_regulator_exit(void)
477{
478 platform_driver_unregister(&da9052_regulator_driver);
479}
480module_exit(da9052_regulator_exit);
481
482MODULE_AUTHOR("David Dajun Chen <dchen@diasemi.com>");
483MODULE_DESCRIPTION("Power Regulator driver for Dialog DA9052 PMIC");
484MODULE_LICENSE("GPL");
485MODULE_ALIAS("platform:da9052-regulator");