Version:  2.0.40 2.2.26 2.4.37 3.4 3.5 3.6 3.7 3.8 3.9 3.10 3.11 3.12 3.13 3.14 3.15 3.16 3.17 3.18 3.19 4.0

Linux/drivers/regulator/max77686.c

  1 /*
  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>
 27 #include <linux/err.h>
 28 #include <linux/gpio.h>
 29 #include <linux/of_gpio.h>
 30 #include <linux/slab.h>
 31 #include <linux/platform_device.h>
 32 #include <linux/regulator/driver.h>
 33 #include <linux/regulator/machine.h>
 34 #include <linux/regulator/of_regulator.h>
 35 #include <linux/mfd/max77686.h>
 36 #include <linux/mfd/max77686-private.h>
 37 
 38 #define MAX77686_LDO_MINUV      800000
 39 #define MAX77686_LDO_UVSTEP     50000
 40 #define MAX77686_LDO_LOW_MINUV  800000
 41 #define MAX77686_LDO_LOW_UVSTEP 25000
 42 #define MAX77686_BUCK_MINUV     750000
 43 #define MAX77686_BUCK_UVSTEP    50000
 44 #define MAX77686_RAMP_DELAY     100000                  /* uV/us */
 45 #define MAX77686_DVS_RAMP_DELAY 27500                   /* uV/us */
 46 #define MAX77686_DVS_MINUV      600000
 47 #define MAX77686_DVS_UVSTEP     12500
 48 
 49 /*
 50  * Value for configuring buck[89] and LDO{20,21,22} as GPIO control.
 51  * It is the same as 'off' for other regulators.
 52  */
 53 #define MAX77686_GPIO_CONTROL           0x0
 54 /*
 55  * Values used for configuring LDOs and bucks.
 56  * Forcing low power mode: LDO1, 3-5, 9, 13, 17-26
 57  */
 58 #define MAX77686_LDO_LOWPOWER           0x1
 59 /*
 60  * On/off controlled by PWRREQ:
 61  *  - LDO2, 6-8, 10-12, 14-16
 62  *  - buck[1234]
 63  */
 64 #define MAX77686_OFF_PWRREQ             0x1
 65 /* Low power mode controlled by PWRREQ: All LDOs */
 66 #define MAX77686_LDO_LOWPOWER_PWRREQ    0x2
 67 /* Forcing low power mode: buck[234] */
 68 #define MAX77686_BUCK_LOWPOWER          0x2
 69 #define MAX77686_NORMAL                 0x3
 70 
 71 #define MAX77686_OPMODE_SHIFT   6
 72 #define MAX77686_OPMODE_BUCK234_SHIFT   4
 73 #define MAX77686_OPMODE_MASK    0x3
 74 
 75 #define MAX77686_VSEL_MASK      0x3F
 76 #define MAX77686_DVS_VSEL_MASK  0xFF
 77 
 78 #define MAX77686_RAMP_RATE_MASK 0xC0
 79 
 80 #define MAX77686_REGULATORS     MAX77686_REG_MAX
 81 #define MAX77686_LDOS           26
 82 
 83 enum max77686_ramp_rate {
 84         RAMP_RATE_13P75MV,
 85         RAMP_RATE_27P5MV,
 86         RAMP_RATE_55MV,
 87         RAMP_RATE_NO_CTRL,      /* 100mV/us */
 88 };
 89 
 90 struct max77686_data {
 91         u64 gpio_enabled:MAX77686_REGULATORS;
 92 
 93         /* Array indexed by regulator id */
 94         unsigned int opmode[MAX77686_REGULATORS];
 95 };
 96 
 97 static unsigned int max77686_get_opmode_shift(int id)
 98 {
 99         switch (id) {
100         case MAX77686_BUCK1:
101         case MAX77686_BUCK5 ... MAX77686_BUCK9:
102                 return 0;
103         case MAX77686_BUCK2 ... MAX77686_BUCK4:
104                 return MAX77686_OPMODE_BUCK234_SHIFT;
105         default:
106                 /* all LDOs */
107                 return MAX77686_OPMODE_SHIFT;
108         }
109 }
110 
111 /*
112  * When regulator is configured for GPIO control then it
113  * replaces "normal" mode. Any change from low power mode to normal
114  * should actually change to GPIO control.
115  * Map normal mode to proper value for such regulators.
116  */
117 static unsigned int max77686_map_normal_mode(struct max77686_data *max77686,
118                                              int id)
119 {
120         switch (id) {
121         case MAX77686_BUCK8:
122         case MAX77686_BUCK9:
123         case MAX77686_LDO20 ... MAX77686_LDO22:
124                 if (max77686->gpio_enabled & (1 << id))
125                         return MAX77686_GPIO_CONTROL;
126         }
127 
128         return MAX77686_NORMAL;
129 }
130 
131 /* Some BUCKs and LDOs supports Normal[ON/OFF] mode during suspend */
132 static int max77686_set_suspend_disable(struct regulator_dev *rdev)
133 {
134         unsigned int val, shift;
135         struct max77686_data *max77686 = rdev_get_drvdata(rdev);
136         int ret, id = rdev_get_id(rdev);
137 
138         shift = max77686_get_opmode_shift(id);
139         val = MAX77686_OFF_PWRREQ;
140 
141         ret = regmap_update_bits(rdev->regmap, rdev->desc->enable_reg,
142                                  rdev->desc->enable_mask, val << shift);
143         if (ret)
144                 return ret;
145 
146         max77686->opmode[id] = val;
147         return 0;
148 }
149 
150 /* Some LDOs supports [LPM/Normal]ON mode during suspend state */
151 static int max77686_set_suspend_mode(struct regulator_dev *rdev,
152                                      unsigned int mode)
153 {
154         struct max77686_data *max77686 = rdev_get_drvdata(rdev);
155         unsigned int val;
156         int ret, id = rdev_get_id(rdev);
157 
158         /* BUCK[5-9] doesn't support this feature */
159         if (id >= MAX77686_BUCK5)
160                 return 0;
161 
162         switch (mode) {
163         case REGULATOR_MODE_IDLE:                       /* ON in LP Mode */
164                 val = MAX77686_LDO_LOWPOWER_PWRREQ;
165                 break;
166         case REGULATOR_MODE_NORMAL:                     /* ON in Normal Mode */
167                 val = max77686_map_normal_mode(max77686, id);
168                 break;
169         default:
170                 pr_warn("%s: regulator_suspend_mode : 0x%x not supported\n",
171                         rdev->desc->name, mode);
172                 return -EINVAL;
173         }
174 
175         ret = regmap_update_bits(rdev->regmap, rdev->desc->enable_reg,
176                                   rdev->desc->enable_mask,
177                                   val << MAX77686_OPMODE_SHIFT);
178         if (ret)
179                 return ret;
180 
181         max77686->opmode[id] = val;
182         return 0;
183 }
184 
185 /* Some LDOs supports LPM-ON/OFF/Normal-ON mode during suspend state */
186 static int max77686_ldo_set_suspend_mode(struct regulator_dev *rdev,
187                                      unsigned int mode)
188 {
189         unsigned int val;
190         struct max77686_data *max77686 = rdev_get_drvdata(rdev);
191         int ret, id = rdev_get_id(rdev);
192 
193         switch (mode) {
194         case REGULATOR_MODE_STANDBY:                    /* switch off */
195                 val = MAX77686_OFF_PWRREQ;
196                 break;
197         case REGULATOR_MODE_IDLE:                       /* ON in LP Mode */
198                 val = MAX77686_LDO_LOWPOWER_PWRREQ;
199                 break;
200         case REGULATOR_MODE_NORMAL:                     /* ON in Normal Mode */
201                 val = max77686_map_normal_mode(max77686, id);
202                 break;
203         default:
204                 pr_warn("%s: regulator_suspend_mode : 0x%x not supported\n",
205                         rdev->desc->name, mode);
206                 return -EINVAL;
207         }
208 
209         ret = regmap_update_bits(rdev->regmap, rdev->desc->enable_reg,
210                                  rdev->desc->enable_mask,
211                                  val << MAX77686_OPMODE_SHIFT);
212         if (ret)
213                 return ret;
214 
215         max77686->opmode[id] = val;
216         return 0;
217 }
218 
219 static int max77686_enable(struct regulator_dev *rdev)
220 {
221         struct max77686_data *max77686 = rdev_get_drvdata(rdev);
222         unsigned int shift;
223         int id = rdev_get_id(rdev);
224 
225         shift = max77686_get_opmode_shift(id);
226 
227         if (max77686->opmode[id] == MAX77686_OFF_PWRREQ)
228                 max77686->opmode[id] = max77686_map_normal_mode(max77686, id);
229 
230         return regmap_update_bits(rdev->regmap, rdev->desc->enable_reg,
231                                   rdev->desc->enable_mask,
232                                   max77686->opmode[id] << shift);
233 }
234 
235 static int max77686_set_ramp_delay(struct regulator_dev *rdev, int ramp_delay)
236 {
237         unsigned int ramp_value = RAMP_RATE_NO_CTRL;
238 
239         switch (ramp_delay) {
240         case 1 ... 13750:
241                 ramp_value = RAMP_RATE_13P75MV;
242                 break;
243         case 13751 ... 27500:
244                 ramp_value = RAMP_RATE_27P5MV;
245                 break;
246         case 27501 ... 55000:
247                 ramp_value = RAMP_RATE_55MV;
248                 break;
249         case 55001 ... 100000:
250                 break;
251         default:
252                 pr_warn("%s: ramp_delay: %d not supported, setting 100000\n",
253                         rdev->desc->name, ramp_delay);
254         }
255 
256         return regmap_update_bits(rdev->regmap, rdev->desc->enable_reg,
257                                   MAX77686_RAMP_RATE_MASK, ramp_value << 6);
258 }
259 
260 static int max77686_of_parse_cb(struct device_node *np,
261                 const struct regulator_desc *desc,
262                 struct regulator_config *config)
263 {
264         struct max77686_data *max77686 = config->driver_data;
265 
266         switch (desc->id) {
267         case MAX77686_BUCK8:
268         case MAX77686_BUCK9:
269         case MAX77686_LDO20 ... MAX77686_LDO22:
270                 config->ena_gpio = of_get_named_gpio(np,
271                                         "maxim,ena-gpios", 0);
272                 config->ena_gpio_flags = GPIOF_OUT_INIT_HIGH;
273                 config->ena_gpio_initialized = true;
274                 break;
275         default:
276                 return 0;
277         }
278 
279         if (gpio_is_valid(config->ena_gpio)) {
280                 max77686->gpio_enabled |= (1 << desc->id);
281 
282                 return regmap_update_bits(config->regmap, desc->enable_reg,
283                                           desc->enable_mask,
284                                           MAX77686_GPIO_CONTROL);
285         }
286 
287         return 0;
288 }
289 
290 static struct regulator_ops max77686_ops = {
291         .list_voltage           = regulator_list_voltage_linear,
292         .map_voltage            = regulator_map_voltage_linear,
293         .is_enabled             = regulator_is_enabled_regmap,
294         .enable                 = max77686_enable,
295         .disable                = regulator_disable_regmap,
296         .get_voltage_sel        = regulator_get_voltage_sel_regmap,
297         .set_voltage_sel        = regulator_set_voltage_sel_regmap,
298         .set_voltage_time_sel   = regulator_set_voltage_time_sel,
299         .set_suspend_mode       = max77686_set_suspend_mode,
300 };
301 
302 static struct regulator_ops max77686_ldo_ops = {
303         .list_voltage           = regulator_list_voltage_linear,
304         .map_voltage            = regulator_map_voltage_linear,
305         .is_enabled             = regulator_is_enabled_regmap,
306         .enable                 = max77686_enable,
307         .disable                = regulator_disable_regmap,
308         .get_voltage_sel        = regulator_get_voltage_sel_regmap,
309         .set_voltage_sel        = regulator_set_voltage_sel_regmap,
310         .set_voltage_time_sel   = regulator_set_voltage_time_sel,
311         .set_suspend_mode       = max77686_ldo_set_suspend_mode,
312         .set_suspend_disable    = max77686_set_suspend_disable,
313 };
314 
315 static struct regulator_ops max77686_buck1_ops = {
316         .list_voltage           = regulator_list_voltage_linear,
317         .map_voltage            = regulator_map_voltage_linear,
318         .is_enabled             = regulator_is_enabled_regmap,
319         .enable                 = max77686_enable,
320         .disable                = regulator_disable_regmap,
321         .get_voltage_sel        = regulator_get_voltage_sel_regmap,
322         .set_voltage_sel        = regulator_set_voltage_sel_regmap,
323         .set_voltage_time_sel   = regulator_set_voltage_time_sel,
324         .set_suspend_disable    = max77686_set_suspend_disable,
325 };
326 
327 static struct regulator_ops max77686_buck_dvs_ops = {
328         .list_voltage           = regulator_list_voltage_linear,
329         .map_voltage            = regulator_map_voltage_linear,
330         .is_enabled             = regulator_is_enabled_regmap,
331         .enable                 = max77686_enable,
332         .disable                = regulator_disable_regmap,
333         .get_voltage_sel        = regulator_get_voltage_sel_regmap,
334         .set_voltage_sel        = regulator_set_voltage_sel_regmap,
335         .set_voltage_time_sel   = regulator_set_voltage_time_sel,
336         .set_ramp_delay         = max77686_set_ramp_delay,
337         .set_suspend_disable    = max77686_set_suspend_disable,
338 };
339 
340 #define regulator_desc_ldo(num)         {                               \
341         .name           = "LDO"#num,                                    \
342         .of_match       = of_match_ptr("LDO"#num),                      \
343         .regulators_node        = of_match_ptr("voltage-regulators"),   \
344         .of_parse_cb    = max77686_of_parse_cb,                         \
345         .id             = MAX77686_LDO##num,                            \
346         .ops            = &max77686_ops,                                \
347         .type           = REGULATOR_VOLTAGE,                            \
348         .owner          = THIS_MODULE,                                  \
349         .min_uV         = MAX77686_LDO_MINUV,                           \
350         .uV_step        = MAX77686_LDO_UVSTEP,                          \
351         .ramp_delay     = MAX77686_RAMP_DELAY,                          \
352         .n_voltages     = MAX77686_VSEL_MASK + 1,                       \
353         .vsel_reg       = MAX77686_REG_LDO1CTRL1 + num - 1,             \
354         .vsel_mask      = MAX77686_VSEL_MASK,                           \
355         .enable_reg     = MAX77686_REG_LDO1CTRL1 + num - 1,             \
356         .enable_mask    = MAX77686_OPMODE_MASK                          \
357                         << MAX77686_OPMODE_SHIFT,                       \
358 }
359 #define regulator_desc_lpm_ldo(num)     {                               \
360         .name           = "LDO"#num,                                    \
361         .of_match       = of_match_ptr("LDO"#num),                      \
362         .regulators_node        = of_match_ptr("voltage-regulators"),   \
363         .id             = MAX77686_LDO##num,                            \
364         .ops            = &max77686_ldo_ops,                            \
365         .type           = REGULATOR_VOLTAGE,                            \
366         .owner          = THIS_MODULE,                                  \
367         .min_uV         = MAX77686_LDO_MINUV,                           \
368         .uV_step        = MAX77686_LDO_UVSTEP,                          \
369         .ramp_delay     = MAX77686_RAMP_DELAY,                          \
370         .n_voltages     = MAX77686_VSEL_MASK + 1,                       \
371         .vsel_reg       = MAX77686_REG_LDO1CTRL1 + num - 1,             \
372         .vsel_mask      = MAX77686_VSEL_MASK,                           \
373         .enable_reg     = MAX77686_REG_LDO1CTRL1 + num - 1,             \
374         .enable_mask    = MAX77686_OPMODE_MASK                          \
375                         << MAX77686_OPMODE_SHIFT,                       \
376 }
377 #define regulator_desc_ldo_low(num)             {                       \
378         .name           = "LDO"#num,                                    \
379         .of_match       = of_match_ptr("LDO"#num),                      \
380         .regulators_node        = of_match_ptr("voltage-regulators"),   \
381         .id             = MAX77686_LDO##num,                            \
382         .ops            = &max77686_ldo_ops,                            \
383         .type           = REGULATOR_VOLTAGE,                            \
384         .owner          = THIS_MODULE,                                  \
385         .min_uV         = MAX77686_LDO_LOW_MINUV,                       \
386         .uV_step        = MAX77686_LDO_LOW_UVSTEP,                      \
387         .ramp_delay     = MAX77686_RAMP_DELAY,                          \
388         .n_voltages     = MAX77686_VSEL_MASK + 1,                       \
389         .vsel_reg       = MAX77686_REG_LDO1CTRL1 + num - 1,             \
390         .vsel_mask      = MAX77686_VSEL_MASK,                           \
391         .enable_reg     = MAX77686_REG_LDO1CTRL1 + num - 1,             \
392         .enable_mask    = MAX77686_OPMODE_MASK                          \
393                         << MAX77686_OPMODE_SHIFT,                       \
394 }
395 #define regulator_desc_ldo1_low(num)            {                       \
396         .name           = "LDO"#num,                                    \
397         .of_match       = of_match_ptr("LDO"#num),                      \
398         .regulators_node        = of_match_ptr("voltage-regulators"),   \
399         .id             = MAX77686_LDO##num,                            \
400         .ops            = &max77686_ops,                                \
401         .type           = REGULATOR_VOLTAGE,                            \
402         .owner          = THIS_MODULE,                                  \
403         .min_uV         = MAX77686_LDO_LOW_MINUV,                       \
404         .uV_step        = MAX77686_LDO_LOW_UVSTEP,                      \
405         .ramp_delay     = MAX77686_RAMP_DELAY,                          \
406         .n_voltages     = MAX77686_VSEL_MASK + 1,                       \
407         .vsel_reg       = MAX77686_REG_LDO1CTRL1 + num - 1,             \
408         .vsel_mask      = MAX77686_VSEL_MASK,                           \
409         .enable_reg     = MAX77686_REG_LDO1CTRL1 + num - 1,             \
410         .enable_mask    = MAX77686_OPMODE_MASK                          \
411                         << MAX77686_OPMODE_SHIFT,                       \
412 }
413 #define regulator_desc_buck(num)                {                       \
414         .name           = "BUCK"#num,                                   \
415         .of_match       = of_match_ptr("BUCK"#num),                     \
416         .regulators_node        = of_match_ptr("voltage-regulators"),   \
417         .of_parse_cb    = max77686_of_parse_cb,                         \
418         .id             = MAX77686_BUCK##num,                           \
419         .ops            = &max77686_ops,                                \
420         .type           = REGULATOR_VOLTAGE,                            \
421         .owner          = THIS_MODULE,                                  \
422         .min_uV         = MAX77686_BUCK_MINUV,                          \
423         .uV_step        = MAX77686_BUCK_UVSTEP,                         \
424         .ramp_delay     = MAX77686_RAMP_DELAY,                          \
425         .n_voltages     = MAX77686_VSEL_MASK + 1,                       \
426         .vsel_reg       = MAX77686_REG_BUCK5OUT + (num - 5) * 2,        \
427         .vsel_mask      = MAX77686_VSEL_MASK,                           \
428         .enable_reg     = MAX77686_REG_BUCK5CTRL + (num - 5) * 2,       \
429         .enable_mask    = MAX77686_OPMODE_MASK,                         \
430 }
431 #define regulator_desc_buck1(num)               {                       \
432         .name           = "BUCK"#num,                                   \
433         .of_match       = of_match_ptr("BUCK"#num),                     \
434         .regulators_node        = of_match_ptr("voltage-regulators"),   \
435         .id             = MAX77686_BUCK##num,                           \
436         .ops            = &max77686_buck1_ops,                          \
437         .type           = REGULATOR_VOLTAGE,                            \
438         .owner          = THIS_MODULE,                                  \
439         .min_uV         = MAX77686_BUCK_MINUV,                          \
440         .uV_step        = MAX77686_BUCK_UVSTEP,                         \
441         .ramp_delay     = MAX77686_RAMP_DELAY,                          \
442         .n_voltages     = MAX77686_VSEL_MASK + 1,                       \
443         .vsel_reg       = MAX77686_REG_BUCK1OUT,                        \
444         .vsel_mask      = MAX77686_VSEL_MASK,                           \
445         .enable_reg     = MAX77686_REG_BUCK1CTRL,                       \
446         .enable_mask    = MAX77686_OPMODE_MASK,                         \
447 }
448 #define regulator_desc_buck_dvs(num)            {                       \
449         .name           = "BUCK"#num,                                   \
450         .of_match       = of_match_ptr("BUCK"#num),                     \
451         .regulators_node        = of_match_ptr("voltage-regulators"),   \
452         .id             = MAX77686_BUCK##num,                           \
453         .ops            = &max77686_buck_dvs_ops,                       \
454         .type           = REGULATOR_VOLTAGE,                            \
455         .owner          = THIS_MODULE,                                  \
456         .min_uV         = MAX77686_DVS_MINUV,                           \
457         .uV_step        = MAX77686_DVS_UVSTEP,                          \
458         .ramp_delay     = MAX77686_DVS_RAMP_DELAY,                      \
459         .n_voltages     = MAX77686_DVS_VSEL_MASK + 1,                   \
460         .vsel_reg       = MAX77686_REG_BUCK2DVS1 + (num - 2) * 10,      \
461         .vsel_mask      = MAX77686_DVS_VSEL_MASK,                       \
462         .enable_reg     = MAX77686_REG_BUCK2CTRL1 + (num - 2) * 10,     \
463         .enable_mask    = MAX77686_OPMODE_MASK                          \
464                         << MAX77686_OPMODE_BUCK234_SHIFT,               \
465 }
466 
467 static const struct regulator_desc regulators[] = {
468         regulator_desc_ldo1_low(1),
469         regulator_desc_ldo_low(2),
470         regulator_desc_ldo(3),
471         regulator_desc_ldo(4),
472         regulator_desc_ldo(5),
473         regulator_desc_ldo_low(6),
474         regulator_desc_ldo_low(7),
475         regulator_desc_ldo_low(8),
476         regulator_desc_ldo(9),
477         regulator_desc_lpm_ldo(10),
478         regulator_desc_lpm_ldo(11),
479         regulator_desc_lpm_ldo(12),
480         regulator_desc_ldo(13),
481         regulator_desc_lpm_ldo(14),
482         regulator_desc_ldo_low(15),
483         regulator_desc_lpm_ldo(16),
484         regulator_desc_ldo(17),
485         regulator_desc_ldo(18),
486         regulator_desc_ldo(19),
487         regulator_desc_ldo(20),
488         regulator_desc_ldo(21),
489         regulator_desc_ldo(22),
490         regulator_desc_ldo(23),
491         regulator_desc_ldo(24),
492         regulator_desc_ldo(25),
493         regulator_desc_ldo(26),
494         regulator_desc_buck1(1),
495         regulator_desc_buck_dvs(2),
496         regulator_desc_buck_dvs(3),
497         regulator_desc_buck_dvs(4),
498         regulator_desc_buck(5),
499         regulator_desc_buck(6),
500         regulator_desc_buck(7),
501         regulator_desc_buck(8),
502         regulator_desc_buck(9),
503 };
504 
505 static int max77686_pmic_probe(struct platform_device *pdev)
506 {
507         struct max77686_dev *iodev = dev_get_drvdata(pdev->dev.parent);
508         struct max77686_data *max77686;
509         int i;
510         struct regulator_config config = { };
511 
512         dev_dbg(&pdev->dev, "%s\n", __func__);
513 
514         max77686 = devm_kzalloc(&pdev->dev, sizeof(struct max77686_data),
515                                 GFP_KERNEL);
516         if (!max77686)
517                 return -ENOMEM;
518 
519         config.dev = iodev->dev;
520         config.regmap = iodev->regmap;
521         config.driver_data = max77686;
522         platform_set_drvdata(pdev, max77686);
523 
524         for (i = 0; i < MAX77686_REGULATORS; i++) {
525                 struct regulator_dev *rdev;
526                 int id = regulators[i].id;
527 
528                 max77686->opmode[id] = MAX77686_NORMAL;
529                 rdev = devm_regulator_register(&pdev->dev,
530                                                 &regulators[i], &config);
531                 if (IS_ERR(rdev)) {
532                         int ret = PTR_ERR(rdev);
533                         dev_err(&pdev->dev,
534                                 "regulator init failed for %d: %d\n", i, ret);
535                         return ret;
536                 }
537         }
538 
539         return 0;
540 }
541 
542 static const struct platform_device_id max77686_pmic_id[] = {
543         {"max77686-pmic", 0},
544         { },
545 };
546 MODULE_DEVICE_TABLE(platform, max77686_pmic_id);
547 
548 static struct platform_driver max77686_pmic_driver = {
549         .driver = {
550                 .name = "max77686-pmic",
551         },
552         .probe = max77686_pmic_probe,
553         .id_table = max77686_pmic_id,
554 };
555 
556 static int __init max77686_pmic_init(void)
557 {
558         return platform_driver_register(&max77686_pmic_driver);
559 }
560 subsys_initcall(max77686_pmic_init);
561 
562 static void __exit max77686_pmic_cleanup(void)
563 {
564         platform_driver_unregister(&max77686_pmic_driver);
565 }
566 module_exit(max77686_pmic_cleanup);
567 
568 MODULE_DESCRIPTION("MAXIM 77686 Regulator Driver");
569 MODULE_AUTHOR("Chiwoong Byun <woong.byun@samsung.com>");
570 MODULE_LICENSE("GPL");
571 

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