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Jonghwa Lee133d4012012-06-01 13:17:14 +09001/*
2 * max77686.c - Regulator driver for the Maxim 77686
3 *
4 * Copyright (C) 2012 Samsung Electronics
5 * Chiwoong Byun <woong.byun@smasung.com>
6 * Jonghwa Lee <jonghwa3.lee@samsung.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 * This program is distributed in the hope that it will be useful,
14 * but WITHOUT ANY WARRANTY; without even the implied warranty of
15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 * GNU General Public License for more details.
17 *
18 * You should have received a copy of the GNU General Public License
19 * along with this program; if not, write to the Free Software
20 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
21 *
22 * This driver is based on max8997.c
23 */
24
25#include <linux/kernel.h>
26#include <linux/bug.h>
Jonghwa Lee133d4012012-06-01 13:17:14 +090027#include <linux/err.h>
28#include <linux/gpio.h>
29#include <linux/slab.h>
30#include <linux/platform_device.h>
31#include <linux/regulator/driver.h>
32#include <linux/regulator/machine.h>
Yadwinder Singh Brar4706fca2012-07-05 09:28:25 +053033#include <linux/regulator/of_regulator.h>
Jonghwa Lee133d4012012-06-01 13:17:14 +090034#include <linux/mfd/max77686.h>
35#include <linux/mfd/max77686-private.h>
36
37#define MAX77686_LDO_MINUV 800000
38#define MAX77686_LDO_UVSTEP 50000
39#define MAX77686_LDO_LOW_MINUV 800000
40#define MAX77686_LDO_LOW_UVSTEP 25000
41#define MAX77686_BUCK_MINUV 750000
42#define MAX77686_BUCK_UVSTEP 50000
Yadwinder Singh Brar852abad2012-06-19 13:23:42 +053043#define MAX77686_RAMP_DELAY 100000 /* uV/us */
44#define MAX77686_DVS_RAMP_DELAY 27500 /* uV/us */
Jonghwa Lee133d4012012-06-01 13:17:14 +090045#define MAX77686_DVS_MINUV 600000
46#define MAX77686_DVS_UVSTEP 12500
47
48#define MAX77686_OPMODE_SHIFT 6
49#define MAX77686_OPMODE_BUCK234_SHIFT 4
50#define MAX77686_OPMODE_MASK 0x3
51
52#define MAX77686_VSEL_MASK 0x3F
53#define MAX77686_DVS_VSEL_MASK 0xFF
54
55#define MAX77686_RAMP_RATE_MASK 0xC0
56
57#define MAX77686_REGULATORS MAX77686_REG_MAX
58#define MAX77686_LDOS 26
59
60enum max77686_ramp_rate {
61 RAMP_RATE_13P75MV,
62 RAMP_RATE_27P5MV,
63 RAMP_RATE_55MV,
64 RAMP_RATE_NO_CTRL, /* 100mV/us */
65};
66
67struct max77686_data {
Yadwinder Singh Brar6d2c8962012-10-16 17:24:18 +053068 unsigned int opmode[MAX77686_REGULATORS];
Jonghwa Lee133d4012012-06-01 13:17:14 +090069};
70
Yadwinder Singh Brar15282ba2012-10-16 17:24:19 +053071/* Some BUCKS supports Normal[ON/OFF] mode during suspend */
72static int max77686_buck_set_suspend_disable(struct regulator_dev *rdev)
73{
74 unsigned int val;
75 struct max77686_data *max77686 = rdev_get_drvdata(rdev);
Axel Lin3ecf1982013-04-27 16:18:16 +080076 int ret, id = rdev_get_id(rdev);
Yadwinder Singh Brar15282ba2012-10-16 17:24:19 +053077
Thiago Farina40e72142013-02-13 17:52:26 -020078 if (id == MAX77686_BUCK1)
Yadwinder Singh Brar15282ba2012-10-16 17:24:19 +053079 val = 0x1;
80 else
81 val = 0x1 << MAX77686_OPMODE_BUCK234_SHIFT;
82
Axel Lin3ecf1982013-04-27 16:18:16 +080083 ret = regmap_update_bits(rdev->regmap, rdev->desc->enable_reg,
84 rdev->desc->enable_mask, val);
85 if (ret)
86 return ret;
87
Thiago Farina40e72142013-02-13 17:52:26 -020088 max77686->opmode[id] = val;
Axel Lin3ecf1982013-04-27 16:18:16 +080089 return 0;
Yadwinder Singh Brar15282ba2012-10-16 17:24:19 +053090}
91
92/* Some LDOs supports [LPM/Normal]ON mode during suspend state */
93static int max77686_set_suspend_mode(struct regulator_dev *rdev,
94 unsigned int mode)
95{
96 struct max77686_data *max77686 = rdev_get_drvdata(rdev);
97 unsigned int val;
Axel Lin3ecf1982013-04-27 16:18:16 +080098 int ret, id = rdev_get_id(rdev);
Yadwinder Singh Brar15282ba2012-10-16 17:24:19 +053099
100 /* BUCK[5-9] doesn't support this feature */
Thiago Farina40e72142013-02-13 17:52:26 -0200101 if (id >= MAX77686_BUCK5)
Yadwinder Singh Brar15282ba2012-10-16 17:24:19 +0530102 return 0;
103
104 switch (mode) {
105 case REGULATOR_MODE_IDLE: /* ON in LP Mode */
106 val = 0x2 << MAX77686_OPMODE_SHIFT;
107 break;
108 case REGULATOR_MODE_NORMAL: /* ON in Normal Mode */
109 val = 0x3 << MAX77686_OPMODE_SHIFT;
110 break;
111 default:
112 pr_warn("%s: regulator_suspend_mode : 0x%x not supported\n",
113 rdev->desc->name, mode);
114 return -EINVAL;
115 }
116
Axel Lin3ecf1982013-04-27 16:18:16 +0800117 ret = regmap_update_bits(rdev->regmap, rdev->desc->enable_reg,
118 rdev->desc->enable_mask, val);
119 if (ret)
120 return ret;
121
Thiago Farina40e72142013-02-13 17:52:26 -0200122 max77686->opmode[id] = val;
Axel Lin3ecf1982013-04-27 16:18:16 +0800123 return 0;
Yadwinder Singh Brar15282ba2012-10-16 17:24:19 +0530124}
125
126/* Some LDOs supports LPM-ON/OFF/Normal-ON mode during suspend state */
127static int max77686_ldo_set_suspend_mode(struct regulator_dev *rdev,
128 unsigned int mode)
129{
130 unsigned int val;
131 struct max77686_data *max77686 = rdev_get_drvdata(rdev);
Axel Lin3ecf1982013-04-27 16:18:16 +0800132 int ret;
Yadwinder Singh Brar15282ba2012-10-16 17:24:19 +0530133
134 switch (mode) {
135 case REGULATOR_MODE_STANDBY: /* switch off */
136 val = 0x1 << MAX77686_OPMODE_SHIFT;
137 break;
138 case REGULATOR_MODE_IDLE: /* ON in LP Mode */
139 val = 0x2 << MAX77686_OPMODE_SHIFT;
140 break;
141 case REGULATOR_MODE_NORMAL: /* ON in Normal Mode */
142 val = 0x3 << MAX77686_OPMODE_SHIFT;
143 break;
144 default:
145 pr_warn("%s: regulator_suspend_mode : 0x%x not supported\n",
146 rdev->desc->name, mode);
147 return -EINVAL;
148 }
149
Axel Lin3ecf1982013-04-27 16:18:16 +0800150 ret = regmap_update_bits(rdev->regmap, rdev->desc->enable_reg,
151 rdev->desc->enable_mask, val);
152 if (ret)
153 return ret;
154
Thiago Farina40e72142013-02-13 17:52:26 -0200155 max77686->opmode[rdev_get_id(rdev)] = val;
Axel Lin3ecf1982013-04-27 16:18:16 +0800156 return 0;
Yadwinder Singh Brar15282ba2012-10-16 17:24:19 +0530157}
158
Yadwinder Singh Brar38d34032012-10-22 09:39:28 +0530159static int max77686_enable(struct regulator_dev *rdev)
Yadwinder Singh Brar6d2c8962012-10-16 17:24:18 +0530160{
161 struct max77686_data *max77686 = rdev_get_drvdata(rdev);
162
163 return regmap_update_bits(rdev->regmap, rdev->desc->enable_reg,
164 rdev->desc->enable_mask,
Thiago Farina40e72142013-02-13 17:52:26 -0200165 max77686->opmode[rdev_get_id(rdev)]);
Yadwinder Singh Brar6d2c8962012-10-16 17:24:18 +0530166}
167
Yadwinder Singh Brarf5030712012-06-20 10:50:51 +0530168static int max77686_set_ramp_delay(struct regulator_dev *rdev, int ramp_delay)
169{
170 unsigned int ramp_value = RAMP_RATE_NO_CTRL;
171
172 switch (ramp_delay) {
173 case 1 ... 13750:
174 ramp_value = RAMP_RATE_13P75MV;
175 break;
176 case 13751 ... 27500:
177 ramp_value = RAMP_RATE_27P5MV;
178 break;
179 case 27501 ... 55000:
180 ramp_value = RAMP_RATE_55MV;
181 break;
182 case 55001 ... 100000:
183 break;
184 default:
185 pr_warn("%s: ramp_delay: %d not supported, setting 100000\n",
186 rdev->desc->name, ramp_delay);
187 }
188
189 return regmap_update_bits(rdev->regmap, rdev->desc->enable_reg,
190 MAX77686_RAMP_RATE_MASK, ramp_value << 6);
191}
192
Jonghwa Lee133d4012012-06-01 13:17:14 +0900193static struct regulator_ops max77686_ops = {
194 .list_voltage = regulator_list_voltage_linear,
Axel Lin2e3f7f22012-06-03 22:46:14 +0800195 .map_voltage = regulator_map_voltage_linear,
Jonghwa Lee133d4012012-06-01 13:17:14 +0900196 .is_enabled = regulator_is_enabled_regmap,
Yadwinder Singh Brar6d2c8962012-10-16 17:24:18 +0530197 .enable = max77686_enable,
Jonghwa Lee133d4012012-06-01 13:17:14 +0900198 .disable = regulator_disable_regmap,
199 .get_voltage_sel = regulator_get_voltage_sel_regmap,
200 .set_voltage_sel = regulator_set_voltage_sel_regmap,
Yadwinder Singh Brar852abad2012-06-19 13:23:42 +0530201 .set_voltage_time_sel = regulator_set_voltage_time_sel,
Yadwinder Singh Brar15282ba2012-10-16 17:24:19 +0530202 .set_suspend_mode = max77686_set_suspend_mode,
203};
204
205static struct regulator_ops max77686_ldo_ops = {
206 .list_voltage = regulator_list_voltage_linear,
207 .map_voltage = regulator_map_voltage_linear,
208 .is_enabled = regulator_is_enabled_regmap,
209 .enable = max77686_enable,
210 .disable = regulator_disable_regmap,
211 .get_voltage_sel = regulator_get_voltage_sel_regmap,
212 .set_voltage_sel = regulator_set_voltage_sel_regmap,
213 .set_voltage_time_sel = regulator_set_voltage_time_sel,
214 .set_suspend_mode = max77686_ldo_set_suspend_mode,
215};
216
217static struct regulator_ops max77686_buck1_ops = {
218 .list_voltage = regulator_list_voltage_linear,
219 .map_voltage = regulator_map_voltage_linear,
220 .is_enabled = regulator_is_enabled_regmap,
221 .enable = max77686_enable,
222 .disable = regulator_disable_regmap,
223 .get_voltage_sel = regulator_get_voltage_sel_regmap,
224 .set_voltage_sel = regulator_set_voltage_sel_regmap,
225 .set_voltage_time_sel = regulator_set_voltage_time_sel,
226 .set_suspend_disable = max77686_buck_set_suspend_disable,
Jonghwa Lee133d4012012-06-01 13:17:14 +0900227};
228
229static struct regulator_ops max77686_buck_dvs_ops = {
230 .list_voltage = regulator_list_voltage_linear,
Axel Lin2e3f7f22012-06-03 22:46:14 +0800231 .map_voltage = regulator_map_voltage_linear,
Jonghwa Lee133d4012012-06-01 13:17:14 +0900232 .is_enabled = regulator_is_enabled_regmap,
Yadwinder Singh Brar6d2c8962012-10-16 17:24:18 +0530233 .enable = max77686_enable,
Jonghwa Lee133d4012012-06-01 13:17:14 +0900234 .disable = regulator_disable_regmap,
235 .get_voltage_sel = regulator_get_voltage_sel_regmap,
236 .set_voltage_sel = regulator_set_voltage_sel_regmap,
Yadwinder Singh Brar852abad2012-06-19 13:23:42 +0530237 .set_voltage_time_sel = regulator_set_voltage_time_sel,
Yadwinder Singh Brarf5030712012-06-20 10:50:51 +0530238 .set_ramp_delay = max77686_set_ramp_delay,
Yadwinder Singh Brar15282ba2012-10-16 17:24:19 +0530239 .set_suspend_disable = max77686_buck_set_suspend_disable,
Jonghwa Lee133d4012012-06-01 13:17:14 +0900240};
241
242#define regulator_desc_ldo(num) { \
243 .name = "LDO"#num, \
244 .id = MAX77686_LDO##num, \
245 .ops = &max77686_ops, \
246 .type = REGULATOR_VOLTAGE, \
247 .owner = THIS_MODULE, \
248 .min_uV = MAX77686_LDO_MINUV, \
249 .uV_step = MAX77686_LDO_UVSTEP, \
Yadwinder Singh Brar852abad2012-06-19 13:23:42 +0530250 .ramp_delay = MAX77686_RAMP_DELAY, \
Jonghwa Lee133d4012012-06-01 13:17:14 +0900251 .n_voltages = MAX77686_VSEL_MASK + 1, \
252 .vsel_reg = MAX77686_REG_LDO1CTRL1 + num - 1, \
253 .vsel_mask = MAX77686_VSEL_MASK, \
254 .enable_reg = MAX77686_REG_LDO1CTRL1 + num - 1, \
255 .enable_mask = MAX77686_OPMODE_MASK \
256 << MAX77686_OPMODE_SHIFT, \
257}
Yadwinder Singh Brar15282ba2012-10-16 17:24:19 +0530258#define regulator_desc_lpm_ldo(num) { \
259 .name = "LDO"#num, \
260 .id = MAX77686_LDO##num, \
261 .ops = &max77686_ldo_ops, \
262 .type = REGULATOR_VOLTAGE, \
263 .owner = THIS_MODULE, \
264 .min_uV = MAX77686_LDO_MINUV, \
265 .uV_step = MAX77686_LDO_UVSTEP, \
266 .ramp_delay = MAX77686_RAMP_DELAY, \
267 .n_voltages = MAX77686_VSEL_MASK + 1, \
268 .vsel_reg = MAX77686_REG_LDO1CTRL1 + num - 1, \
269 .vsel_mask = MAX77686_VSEL_MASK, \
270 .enable_reg = MAX77686_REG_LDO1CTRL1 + num - 1, \
271 .enable_mask = MAX77686_OPMODE_MASK \
272 << MAX77686_OPMODE_SHIFT, \
273}
Jonghwa Lee133d4012012-06-01 13:17:14 +0900274#define regulator_desc_ldo_low(num) { \
275 .name = "LDO"#num, \
276 .id = MAX77686_LDO##num, \
Yadwinder Singh Brar15282ba2012-10-16 17:24:19 +0530277 .ops = &max77686_ldo_ops, \
278 .type = REGULATOR_VOLTAGE, \
279 .owner = THIS_MODULE, \
280 .min_uV = MAX77686_LDO_LOW_MINUV, \
281 .uV_step = MAX77686_LDO_LOW_UVSTEP, \
282 .ramp_delay = MAX77686_RAMP_DELAY, \
283 .n_voltages = MAX77686_VSEL_MASK + 1, \
284 .vsel_reg = MAX77686_REG_LDO1CTRL1 + num - 1, \
285 .vsel_mask = MAX77686_VSEL_MASK, \
286 .enable_reg = MAX77686_REG_LDO1CTRL1 + num - 1, \
287 .enable_mask = MAX77686_OPMODE_MASK \
288 << MAX77686_OPMODE_SHIFT, \
289}
290#define regulator_desc_ldo1_low(num) { \
291 .name = "LDO"#num, \
292 .id = MAX77686_LDO##num, \
Jonghwa Lee133d4012012-06-01 13:17:14 +0900293 .ops = &max77686_ops, \
294 .type = REGULATOR_VOLTAGE, \
295 .owner = THIS_MODULE, \
296 .min_uV = MAX77686_LDO_LOW_MINUV, \
297 .uV_step = MAX77686_LDO_LOW_UVSTEP, \
Yadwinder Singh Brar852abad2012-06-19 13:23:42 +0530298 .ramp_delay = MAX77686_RAMP_DELAY, \
Jonghwa Lee133d4012012-06-01 13:17:14 +0900299 .n_voltages = MAX77686_VSEL_MASK + 1, \
300 .vsel_reg = MAX77686_REG_LDO1CTRL1 + num - 1, \
301 .vsel_mask = MAX77686_VSEL_MASK, \
302 .enable_reg = MAX77686_REG_LDO1CTRL1 + num - 1, \
303 .enable_mask = MAX77686_OPMODE_MASK \
304 << MAX77686_OPMODE_SHIFT, \
305}
306#define regulator_desc_buck(num) { \
307 .name = "BUCK"#num, \
308 .id = MAX77686_BUCK##num, \
309 .ops = &max77686_ops, \
310 .type = REGULATOR_VOLTAGE, \
311 .owner = THIS_MODULE, \
312 .min_uV = MAX77686_BUCK_MINUV, \
313 .uV_step = MAX77686_BUCK_UVSTEP, \
Yadwinder Singh Brar852abad2012-06-19 13:23:42 +0530314 .ramp_delay = MAX77686_RAMP_DELAY, \
Jonghwa Lee133d4012012-06-01 13:17:14 +0900315 .n_voltages = MAX77686_VSEL_MASK + 1, \
316 .vsel_reg = MAX77686_REG_BUCK5OUT + (num - 5) * 2, \
317 .vsel_mask = MAX77686_VSEL_MASK, \
318 .enable_reg = MAX77686_REG_BUCK5CTRL + (num - 5) * 2, \
319 .enable_mask = MAX77686_OPMODE_MASK, \
320}
321#define regulator_desc_buck1(num) { \
322 .name = "BUCK"#num, \
323 .id = MAX77686_BUCK##num, \
Yadwinder Singh Brar15282ba2012-10-16 17:24:19 +0530324 .ops = &max77686_buck1_ops, \
Jonghwa Lee133d4012012-06-01 13:17:14 +0900325 .type = REGULATOR_VOLTAGE, \
326 .owner = THIS_MODULE, \
327 .min_uV = MAX77686_BUCK_MINUV, \
328 .uV_step = MAX77686_BUCK_UVSTEP, \
Yadwinder Singh Brar852abad2012-06-19 13:23:42 +0530329 .ramp_delay = MAX77686_RAMP_DELAY, \
Jonghwa Lee133d4012012-06-01 13:17:14 +0900330 .n_voltages = MAX77686_VSEL_MASK + 1, \
331 .vsel_reg = MAX77686_REG_BUCK1OUT, \
332 .vsel_mask = MAX77686_VSEL_MASK, \
333 .enable_reg = MAX77686_REG_BUCK1CTRL, \
334 .enable_mask = MAX77686_OPMODE_MASK, \
335}
336#define regulator_desc_buck_dvs(num) { \
337 .name = "BUCK"#num, \
338 .id = MAX77686_BUCK##num, \
Axel Lin74adfee52012-06-04 10:19:18 +0800339 .ops = &max77686_buck_dvs_ops, \
Jonghwa Lee133d4012012-06-01 13:17:14 +0900340 .type = REGULATOR_VOLTAGE, \
341 .owner = THIS_MODULE, \
342 .min_uV = MAX77686_DVS_MINUV, \
343 .uV_step = MAX77686_DVS_UVSTEP, \
Yadwinder Singh Brar852abad2012-06-19 13:23:42 +0530344 .ramp_delay = MAX77686_DVS_RAMP_DELAY, \
Jonghwa Lee133d4012012-06-01 13:17:14 +0900345 .n_voltages = MAX77686_DVS_VSEL_MASK + 1, \
346 .vsel_reg = MAX77686_REG_BUCK2DVS1 + (num - 2) * 10, \
347 .vsel_mask = MAX77686_DVS_VSEL_MASK, \
348 .enable_reg = MAX77686_REG_BUCK2CTRL1 + (num - 2) * 10, \
349 .enable_mask = MAX77686_OPMODE_MASK \
350 << MAX77686_OPMODE_BUCK234_SHIFT, \
351}
352
353static struct regulator_desc regulators[] = {
Yadwinder Singh Brar15282ba2012-10-16 17:24:19 +0530354 regulator_desc_ldo1_low(1),
Jonghwa Lee133d4012012-06-01 13:17:14 +0900355 regulator_desc_ldo_low(2),
356 regulator_desc_ldo(3),
357 regulator_desc_ldo(4),
358 regulator_desc_ldo(5),
359 regulator_desc_ldo_low(6),
360 regulator_desc_ldo_low(7),
361 regulator_desc_ldo_low(8),
362 regulator_desc_ldo(9),
Yadwinder Singh Brar15282ba2012-10-16 17:24:19 +0530363 regulator_desc_lpm_ldo(10),
364 regulator_desc_lpm_ldo(11),
365 regulator_desc_lpm_ldo(12),
Jonghwa Lee133d4012012-06-01 13:17:14 +0900366 regulator_desc_ldo(13),
Yadwinder Singh Brar15282ba2012-10-16 17:24:19 +0530367 regulator_desc_lpm_ldo(14),
Jonghwa Lee133d4012012-06-01 13:17:14 +0900368 regulator_desc_ldo_low(15),
Yadwinder Singh Brar15282ba2012-10-16 17:24:19 +0530369 regulator_desc_lpm_ldo(16),
Jonghwa Lee133d4012012-06-01 13:17:14 +0900370 regulator_desc_ldo(17),
371 regulator_desc_ldo(18),
372 regulator_desc_ldo(19),
373 regulator_desc_ldo(20),
374 regulator_desc_ldo(21),
375 regulator_desc_ldo(22),
376 regulator_desc_ldo(23),
377 regulator_desc_ldo(24),
378 regulator_desc_ldo(25),
379 regulator_desc_ldo(26),
380 regulator_desc_buck1(1),
381 regulator_desc_buck_dvs(2),
382 regulator_desc_buck_dvs(3),
383 regulator_desc_buck_dvs(4),
384 regulator_desc_buck(5),
385 regulator_desc_buck(6),
386 regulator_desc_buck(7),
387 regulator_desc_buck(8),
388 regulator_desc_buck(9),
389};
390
Yadwinder Singh Brar4706fca2012-07-05 09:28:25 +0530391#ifdef CONFIG_OF
Axel Linb19f5752013-01-25 10:24:18 +0800392static int max77686_pmic_dt_parse_pdata(struct platform_device *pdev,
Yadwinder Singh Brar4706fca2012-07-05 09:28:25 +0530393 struct max77686_platform_data *pdata)
394{
Axel Linb19f5752013-01-25 10:24:18 +0800395 struct max77686_dev *iodev = dev_get_drvdata(pdev->dev.parent);
Yadwinder Singh Brar4706fca2012-07-05 09:28:25 +0530396 struct device_node *pmic_np, *regulators_np;
397 struct max77686_regulator_data *rdata;
398 struct of_regulator_match rmatch;
399 unsigned int i;
400
401 pmic_np = iodev->dev->of_node;
Sachin Kamat398a6612014-02-14 17:19:47 +0530402 regulators_np = of_get_child_by_name(pmic_np, "voltage-regulators");
Yadwinder Singh Brar4706fca2012-07-05 09:28:25 +0530403 if (!regulators_np) {
Axel Linb19f5752013-01-25 10:24:18 +0800404 dev_err(&pdev->dev, "could not find regulators sub-node\n");
Yadwinder Singh Brar4706fca2012-07-05 09:28:25 +0530405 return -EINVAL;
406 }
407
408 pdata->num_regulators = ARRAY_SIZE(regulators);
Axel Linb19f5752013-01-25 10:24:18 +0800409 rdata = devm_kzalloc(&pdev->dev, sizeof(*rdata) *
Yadwinder Singh Brar4706fca2012-07-05 09:28:25 +0530410 pdata->num_regulators, GFP_KERNEL);
411 if (!rdata) {
Sachin Kamatda0ee722014-02-17 14:33:32 +0530412 of_node_put(regulators_np);
Yadwinder Singh Brar4706fca2012-07-05 09:28:25 +0530413 return -ENOMEM;
414 }
415
416 for (i = 0; i < pdata->num_regulators; i++) {
417 rmatch.name = regulators[i].name;
418 rmatch.init_data = NULL;
Yadwinder Singh Brard1ef0652012-07-06 14:50:08 +0530419 rmatch.of_node = NULL;
Axel Linb19f5752013-01-25 10:24:18 +0800420 of_regulator_match(&pdev->dev, regulators_np, &rmatch, 1);
Yadwinder Singh Brar4706fca2012-07-05 09:28:25 +0530421 rdata[i].initdata = rmatch.init_data;
Axel Lin2c58e262012-08-05 10:09:57 +0800422 rdata[i].of_node = rmatch.of_node;
Yadwinder Singh Brar4706fca2012-07-05 09:28:25 +0530423 }
424
425 pdata->regulators = rdata;
Sachin Kamatda0ee722014-02-17 14:33:32 +0530426 of_node_put(regulators_np);
Yadwinder Singh Brar4706fca2012-07-05 09:28:25 +0530427
428 return 0;
429}
430#else
Axel Linb19f5752013-01-25 10:24:18 +0800431static int max77686_pmic_dt_parse_pdata(struct platform_device *pdev,
Yadwinder Singh Brar4706fca2012-07-05 09:28:25 +0530432 struct max77686_platform_data *pdata)
433{
434 return 0;
435}
436#endif /* CONFIG_OF */
437
Bill Pembertona5023572012-11-19 13:22:22 -0500438static int max77686_pmic_probe(struct platform_device *pdev)
Jonghwa Lee133d4012012-06-01 13:17:14 +0900439{
440 struct max77686_dev *iodev = dev_get_drvdata(pdev->dev.parent);
441 struct max77686_platform_data *pdata = dev_get_platdata(iodev->dev);
Jonghwa Lee133d4012012-06-01 13:17:14 +0900442 struct max77686_data *max77686;
Axel Lincb44cde2012-08-05 10:11:16 +0800443 int i, ret = 0;
Axel Linc59d2a62012-06-20 15:01:25 +0800444 struct regulator_config config = { };
Jonghwa Lee133d4012012-06-01 13:17:14 +0900445
446 dev_dbg(&pdev->dev, "%s\n", __func__);
447
Yadwinder Singh Brar4706fca2012-07-05 09:28:25 +0530448 if (!pdata) {
449 dev_err(&pdev->dev, "no platform data found for regulator\n");
450 return -ENODEV;
451 }
452
453 if (iodev->dev->of_node) {
Axel Linb19f5752013-01-25 10:24:18 +0800454 ret = max77686_pmic_dt_parse_pdata(pdev, pdata);
Yadwinder Singh Brar4706fca2012-07-05 09:28:25 +0530455 if (ret)
456 return ret;
457 }
458
459 if (pdata->num_regulators != MAX77686_REGULATORS) {
Axel Linab0d1cb2012-06-08 12:03:04 +0800460 dev_err(&pdev->dev,
461 "Invalid initial data for regulator's initialiation\n");
462 return -EINVAL;
463 }
464
Jonghwa Lee133d4012012-06-01 13:17:14 +0900465 max77686 = devm_kzalloc(&pdev->dev, sizeof(struct max77686_data),
466 GFP_KERNEL);
467 if (!max77686)
468 return -ENOMEM;
469
Yadwinder Singh Brarf5030712012-06-20 10:50:51 +0530470 config.dev = &pdev->dev;
471 config.regmap = iodev->regmap;
Yadwinder Singh Brar6d2c8962012-10-16 17:24:18 +0530472 config.driver_data = max77686;
Jonghwa Lee133d4012012-06-01 13:17:14 +0900473 platform_set_drvdata(pdev, max77686);
474
Axel Linab0d1cb2012-06-08 12:03:04 +0800475 for (i = 0; i < MAX77686_REGULATORS; i++) {
Krzysztof Kozlowskib0c13e82014-03-10 09:32:45 +0100476 struct regulator_dev *rdev;
477
Axel Linab0d1cb2012-06-08 12:03:04 +0800478 config.init_data = pdata->regulators[i].initdata;
Axel Lin2c58e262012-08-05 10:09:57 +0800479 config.of_node = pdata->regulators[i].of_node;
Jonghwa Lee133d4012012-06-01 13:17:14 +0900480
Yadwinder Singh Brar6d2c8962012-10-16 17:24:18 +0530481 max77686->opmode[i] = regulators[i].enable_mask;
Krzysztof Kozlowskib0c13e82014-03-10 09:32:45 +0100482 rdev = devm_regulator_register(&pdev->dev,
Sachin Kamat44815b42013-09-04 11:07:54 +0530483 &regulators[i], &config);
Krzysztof Kozlowskib0c13e82014-03-10 09:32:45 +0100484 if (IS_ERR(rdev)) {
Yadwinder Singh Brarf5030712012-06-20 10:50:51 +0530485 dev_err(&pdev->dev,
Jonghwa Lee133d4012012-06-01 13:17:14 +0900486 "regulator init failed for %d\n", i);
Krzysztof Kozlowskib0c13e82014-03-10 09:32:45 +0100487 return PTR_ERR(rdev);
Jonghwa Lee133d4012012-06-01 13:17:14 +0900488 }
Jonghwa Lee133d4012012-06-01 13:17:14 +0900489 }
Axel Linab0d1cb2012-06-08 12:03:04 +0800490
Jonghwa Lee133d4012012-06-01 13:17:14 +0900491 return 0;
Jonghwa Lee133d4012012-06-01 13:17:14 +0900492}
493
494static const struct platform_device_id max77686_pmic_id[] = {
495 {"max77686-pmic", 0},
496 { },
497};
498MODULE_DEVICE_TABLE(platform, max77686_pmic_id);
499
500static struct platform_driver max77686_pmic_driver = {
501 .driver = {
502 .name = "max77686-pmic",
503 .owner = THIS_MODULE,
504 },
505 .probe = max77686_pmic_probe,
Jonghwa Lee133d4012012-06-01 13:17:14 +0900506 .id_table = max77686_pmic_id,
507};
508
509static int __init max77686_pmic_init(void)
510{
511 return platform_driver_register(&max77686_pmic_driver);
512}
513subsys_initcall(max77686_pmic_init);
514
515static void __exit max77686_pmic_cleanup(void)
516{
517 platform_driver_unregister(&max77686_pmic_driver);
518}
519module_exit(max77686_pmic_cleanup);
520
521MODULE_DESCRIPTION("MAXIM 77686 Regulator Driver");
522MODULE_AUTHOR("Chiwoong Byun <woong.byun@samsung.com>");
523MODULE_LICENSE("GPL");