Release 4.12 drivers/regulator/max77686-regulator.c
  
  
  
/*
 * max77686.c - Regulator driver for the Maxim 77686
 *
 * Copyright (C) 2012 Samsung Electronics
 * Chiwoong Byun <woong.byun@samsung.com>
 * Jonghwa Lee <jonghwa3.lee@samsung.com>
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 2 of the License, or
 * (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
 *
 * This driver is based on max8997.c
 */
#include <linux/kernel.h>
#include <linux/bug.h>
#include <linux/err.h>
#include <linux/gpio.h>
#include <linux/of_gpio.h>
#include <linux/slab.h>
#include <linux/platform_device.h>
#include <linux/regulator/driver.h>
#include <linux/regulator/machine.h>
#include <linux/regulator/of_regulator.h>
#include <linux/mfd/max77686.h>
#include <linux/mfd/max77686-private.h>
#define MAX77686_LDO_MINUV	800000
#define MAX77686_LDO_UVSTEP	50000
#define MAX77686_LDO_LOW_MINUV	800000
#define MAX77686_LDO_LOW_UVSTEP	25000
#define MAX77686_BUCK_MINUV	750000
#define MAX77686_BUCK_UVSTEP	50000
#define MAX77686_BUCK_ENABLE_TIME	40		
/* us */
#define MAX77686_DVS_ENABLE_TIME	22		
/* us */
#define MAX77686_RAMP_DELAY	100000			
/* uV/us */
#define MAX77686_DVS_RAMP_DELAY	27500			
/* uV/us */
#define MAX77686_DVS_MINUV	600000
#define MAX77686_DVS_UVSTEP	12500
/*
 * Value for configuring buck[89] and LDO{20,21,22} as GPIO control.
 * It is the same as 'off' for other regulators.
 */
#define MAX77686_GPIO_CONTROL		0x0
/*
 * Values used for configuring LDOs and bucks.
 * Forcing low power mode: LDO1, 3-5, 9, 13, 17-26
 */
#define MAX77686_LDO_LOWPOWER		0x1
/*
 * On/off controlled by PWRREQ:
 *  - LDO2, 6-8, 10-12, 14-16
 *  - buck[1234]
 */
#define MAX77686_OFF_PWRREQ		0x1
/* Low power mode controlled by PWRREQ: All LDOs */
#define MAX77686_LDO_LOWPOWER_PWRREQ	0x2
/* Forcing low power mode: buck[234] */
#define MAX77686_BUCK_LOWPOWER		0x2
#define MAX77686_NORMAL			0x3
#define MAX77686_OPMODE_SHIFT	6
#define MAX77686_OPMODE_BUCK234_SHIFT	4
#define MAX77686_OPMODE_MASK	0x3
#define MAX77686_VSEL_MASK	0x3F
#define MAX77686_DVS_VSEL_MASK	0xFF
#define MAX77686_RAMP_RATE_MASK	0xC0
#define MAX77686_REGULATORS	MAX77686_REG_MAX
#define MAX77686_LDOS		26
enum max77686_ramp_rate {
	
RAMP_RATE_13P75MV,
	
RAMP_RATE_27P5MV,
	
RAMP_RATE_55MV,
	
RAMP_RATE_NO_CTRL,	/* 100mV/us */
};
struct max77686_data {
	DECLARE_BITMAP(gpio_enabled, MAX77686_REGULATORS);
	/* Array indexed by regulator id */
	
unsigned int opmode[MAX77686_REGULATORS];
};
static unsigned int max77686_get_opmode_shift(int id)
{
	switch (id) {
	case MAX77686_BUCK1:
	case MAX77686_BUCK5 ... MAX77686_BUCK9:
		return 0;
	case MAX77686_BUCK2 ... MAX77686_BUCK4:
		return MAX77686_OPMODE_BUCK234_SHIFT;
	default:
		/* all LDOs */
		return MAX77686_OPMODE_SHIFT;
	}
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp | 
| Krzysztof Kozlowski | 40 | 100.00% | 1 | 100.00% | 
| Total | 40 | 100.00% | 1 | 100.00% | 
/*
 * When regulator is configured for GPIO control then it
 * replaces "normal" mode. Any change from low power mode to normal
 * should actually change to GPIO control.
 * Map normal mode to proper value for such regulators.
 */
static unsigned int max77686_map_normal_mode(struct max77686_data *max77686,
					     int id)
{
	switch (id) {
	case MAX77686_BUCK8:
	case MAX77686_BUCK9:
	case MAX77686_LDO20 ... MAX77686_LDO22:
		if (test_bit(id, max77686->gpio_enabled))
			return MAX77686_GPIO_CONTROL;
	}
	return MAX77686_NORMAL;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp | 
| Krzysztof Kozlowski | 44 | 89.80% | 1 | 50.00% | 
| Joe Perches | 5 | 10.20% | 1 | 50.00% | 
| Total | 49 | 100.00% | 2 | 100.00% | 
/* Some BUCKs and LDOs supports Normal[ON/OFF] mode during suspend */
static int max77686_set_suspend_disable(struct regulator_dev *rdev)
{
	unsigned int val, shift;
	struct max77686_data *max77686 = rdev_get_drvdata(rdev);
	int ret, id = rdev_get_id(rdev);
	shift = max77686_get_opmode_shift(id);
	val = MAX77686_OFF_PWRREQ;
	ret = regmap_update_bits(rdev->regmap, rdev->desc->enable_reg,
				 rdev->desc->enable_mask, val << shift);
	if (ret)
		return ret;
	max77686->opmode[id] = val;
	return 0;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp | 
| Yadwinder Singh Brar | 51 | 55.43% | 1 | 16.67% | 
| Axel Lin | 22 | 23.91% | 1 | 16.67% | 
| Krzysztof Kozlowski | 11 | 11.96% | 3 | 50.00% | 
| Thiago Farina | 8 | 8.70% | 1 | 16.67% | 
| Total | 92 | 100.00% | 6 | 100.00% | 
/* Some LDOs supports [LPM/Normal]ON mode during suspend state */
static int max77686_set_suspend_mode(struct regulator_dev *rdev,
				     unsigned int mode)
{
	struct max77686_data *max77686 = rdev_get_drvdata(rdev);
	unsigned int val;
	int ret, id = rdev_get_id(rdev);
	/* BUCK[5-9] doesn't support this feature */
	if (id >= MAX77686_BUCK5)
		return 0;
	switch (mode) {
	case REGULATOR_MODE_IDLE:			/* ON in LP Mode */
		val = MAX77686_LDO_LOWPOWER_PWRREQ;
		break;
	case REGULATOR_MODE_NORMAL:			/* ON in Normal Mode */
		val = max77686_map_normal_mode(max77686, id);
		break;
	default:
		pr_warn("%s: regulator_suspend_mode : 0x%x not supported\n",
			rdev->desc->name, mode);
		return -EINVAL;
	}
	ret = regmap_update_bits(rdev->regmap, rdev->desc->enable_reg,
				  rdev->desc->enable_mask,
				  val << MAX77686_OPMODE_SHIFT);
	if (ret)
		return ret;
	max77686->opmode[id] = val;
	return 0;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp | 
| Yadwinder Singh Brar | 101 | 72.14% | 1 | 16.67% | 
| Axel Lin | 22 | 15.71% | 1 | 16.67% | 
| Krzysztof Kozlowski | 9 | 6.43% | 3 | 50.00% | 
| Thiago Farina | 8 | 5.71% | 1 | 16.67% | 
| Total | 140 | 100.00% | 6 | 100.00% | 
/* Some LDOs supports LPM-ON/OFF/Normal-ON mode during suspend state */
static int max77686_ldo_set_suspend_mode(struct regulator_dev *rdev,
				     unsigned int mode)
{
	unsigned int val;
	struct max77686_data *max77686 = rdev_get_drvdata(rdev);
	int ret, id = rdev_get_id(rdev);
	switch (mode) {
	case REGULATOR_MODE_STANDBY:			/* switch off */
		val = MAX77686_OFF_PWRREQ;
		break;
	case REGULATOR_MODE_IDLE:			/* ON in LP Mode */
		val = MAX77686_LDO_LOWPOWER_PWRREQ;
		break;
	case REGULATOR_MODE_NORMAL:			/* ON in Normal Mode */
		val = max77686_map_normal_mode(max77686, id);
		break;
	default:
		pr_warn("%s: regulator_suspend_mode : 0x%x not supported\n",
			rdev->desc->name, mode);
		return -EINVAL;
	}
	ret = regmap_update_bits(rdev->regmap, rdev->desc->enable_reg,
				 rdev->desc->enable_mask,
				 val << MAX77686_OPMODE_SHIFT);
	if (ret)
		return ret;
	max77686->opmode[id] = val;
	return 0;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp | 
| Yadwinder Singh Brar | 99 | 71.22% | 1 | 20.00% | 
| Axel Lin | 22 | 15.83% | 1 | 20.00% | 
| Krzysztof Kozlowski | 18 | 12.95% | 3 | 60.00% | 
| Total | 139 | 100.00% | 5 | 100.00% | 
static int max77686_enable(struct regulator_dev *rdev)
{
	struct max77686_data *max77686 = rdev_get_drvdata(rdev);
	unsigned int shift;
	int id = rdev_get_id(rdev);
	shift = max77686_get_opmode_shift(id);
	if (max77686->opmode[id] == MAX77686_OFF_PWRREQ)
		max77686->opmode[id] = max77686_map_normal_mode(max77686, id);
	return regmap_update_bits(rdev->regmap, rdev->desc->enable_reg,
				  rdev->desc->enable_mask,
				  max77686->opmode[id] << shift);
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp | 
| Yadwinder Singh Brar | 47 | 50.00% | 2 | 40.00% | 
| Krzysztof Kozlowski | 47 | 50.00% | 3 | 60.00% | 
| Total | 94 | 100.00% | 5 | 100.00% | 
static int max77686_set_ramp_delay(struct regulator_dev *rdev, int ramp_delay)
{
	unsigned int ramp_value = RAMP_RATE_NO_CTRL;
	switch (ramp_delay) {
	case 1 ... 13750:
		ramp_value = RAMP_RATE_13P75MV;
		break;
	case 13751 ... 27500:
		ramp_value = RAMP_RATE_27P5MV;
		break;
	case 27501 ... 55000:
		ramp_value = RAMP_RATE_55MV;
		break;
	case 55001 ... 100000:
		break;
	default:
		pr_warn("%s: ramp_delay: %d not supported, setting 100000\n",
			rdev->desc->name, ramp_delay);
	}
	return regmap_update_bits(rdev->regmap, rdev->desc->enable_reg,
				  MAX77686_RAMP_RATE_MASK, ramp_value << 6);
}
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| Total | 96 | 100.00% | 1 | 100.00% | 
static int max77686_of_parse_cb(struct device_node *np,
		const struct regulator_desc *desc,
		struct regulator_config *config)
{
	struct max77686_data *max77686 = config->driver_data;
	switch (desc->id) {
	case MAX77686_BUCK8:
	case MAX77686_BUCK9:
	case MAX77686_LDO20 ... MAX77686_LDO22:
		config->ena_gpio = of_get_named_gpio(np,
					"maxim,ena-gpios", 0);
		config->ena_gpio_flags = GPIOF_OUT_INIT_HIGH;
		config->ena_gpio_initialized = true;
		break;
	default:
		return 0;
	}
	if (gpio_is_valid(config->ena_gpio)) {
		set_bit(desc->id, max77686->gpio_enabled);
		return regmap_update_bits(config->regmap, desc->enable_reg,
					  desc->enable_mask,
					  MAX77686_GPIO_CONTROL);
	}
	return 0;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp | 
| Krzysztof Kozlowski | 116 | 94.31% | 1 | 50.00% | 
| Joe Perches | 7 | 5.69% | 1 | 50.00% | 
| Total | 123 | 100.00% | 2 | 100.00% | 
static const struct regulator_ops max77686_ops = {
	.list_voltage		= regulator_list_voltage_linear,
	.map_voltage		= regulator_map_voltage_linear,
	.is_enabled		= regulator_is_enabled_regmap,
	.enable			= max77686_enable,
	.disable		= regulator_disable_regmap,
	.get_voltage_sel	= regulator_get_voltage_sel_regmap,
	.set_voltage_sel	= regulator_set_voltage_sel_regmap,
	.set_voltage_time_sel	= regulator_set_voltage_time_sel,
	.set_suspend_mode	= max77686_set_suspend_mode,
};
static const struct regulator_ops max77686_ldo_ops = {
	.list_voltage		= regulator_list_voltage_linear,
	.map_voltage		= regulator_map_voltage_linear,
	.is_enabled		= regulator_is_enabled_regmap,
	.enable			= max77686_enable,
	.disable		= regulator_disable_regmap,
	.get_voltage_sel	= regulator_get_voltage_sel_regmap,
	.set_voltage_sel	= regulator_set_voltage_sel_regmap,
	.set_voltage_time_sel	= regulator_set_voltage_time_sel,
	.set_suspend_mode	= max77686_ldo_set_suspend_mode,
	.set_suspend_disable	= max77686_set_suspend_disable,
};
static const struct regulator_ops max77686_buck1_ops = {
	.list_voltage		= regulator_list_voltage_linear,
	.map_voltage		= regulator_map_voltage_linear,
	.is_enabled		= regulator_is_enabled_regmap,
	.enable			= max77686_enable,
	.disable		= regulator_disable_regmap,
	.get_voltage_sel	= regulator_get_voltage_sel_regmap,
	.set_voltage_sel	= regulator_set_voltage_sel_regmap,
	.set_voltage_time_sel	= regulator_set_voltage_time_sel,
	.set_suspend_disable	= max77686_set_suspend_disable,
};
static const struct regulator_ops max77686_buck_dvs_ops = {
	.list_voltage		= regulator_list_voltage_linear,
	.map_voltage		= regulator_map_voltage_linear,
	.is_enabled		= regulator_is_enabled_regmap,
	.enable			= max77686_enable,
	.disable		= regulator_disable_regmap,
	.get_voltage_sel	= regulator_get_voltage_sel_regmap,
	.set_voltage_sel	= regulator_set_voltage_sel_regmap,
	.set_voltage_time_sel	= regulator_set_voltage_time_sel,
	.set_ramp_delay		= max77686_set_ramp_delay,
	.set_suspend_disable	= max77686_set_suspend_disable,
};
#define regulator_desc_ldo(num)		{                               \
        .name           = "LDO"#num,                                    \
        .of_match       = of_match_ptr("LDO"#num),                      \
        .regulators_node        = of_match_ptr("voltage-regulators"),   \
        .of_parse_cb    = max77686_of_parse_cb,                         \
        .id             = MAX77686_LDO##num,                            \
        .ops            = &max77686_ops,                                \
        .type           = REGULATOR_VOLTAGE,                            \
        .owner          = THIS_MODULE,                                  \
        .min_uV         = MAX77686_LDO_MINUV,                           \
        .uV_step        = MAX77686_LDO_UVSTEP,                          \
        .ramp_delay     = MAX77686_RAMP_DELAY,                          \
        .n_voltages     = MAX77686_VSEL_MASK + 1,                       \
        .vsel_reg       = MAX77686_REG_LDO1CTRL1 + num - 1,             \
        .vsel_mask      = MAX77686_VSEL_MASK,                           \
        .enable_reg     = MAX77686_REG_LDO1CTRL1 + num - 1,             \
        .enable_mask    = MAX77686_OPMODE_MASK                          \
                        << MAX77686_OPMODE_SHIFT,                       \
}
#define regulator_desc_lpm_ldo(num)	{                               \
        .name           = "LDO"#num,                                    \
        .of_match       = of_match_ptr("LDO"#num),                      \
        .regulators_node        = of_match_ptr("voltage-regulators"),   \
        .id             = MAX77686_LDO##num,                            \
        .ops            = &max77686_ldo_ops,                            \
        .type           = REGULATOR_VOLTAGE,                            \
        .owner          = THIS_MODULE,                                  \
        .min_uV         = MAX77686_LDO_MINUV,                           \
        .uV_step        = MAX77686_LDO_UVSTEP,                          \
        .ramp_delay     = MAX77686_RAMP_DELAY,                          \
        .n_voltages     = MAX77686_VSEL_MASK + 1,                       \
        .vsel_reg       = MAX77686_REG_LDO1CTRL1 + num - 1,             \
        .vsel_mask      = MAX77686_VSEL_MASK,                           \
        .enable_reg     = MAX77686_REG_LDO1CTRL1 + num - 1,             \
        .enable_mask    = MAX77686_OPMODE_MASK                          \
                        << MAX77686_OPMODE_SHIFT,                       \
}
#define regulator_desc_ldo_low(num)		{                       \
        .name           = "LDO"#num,                                    \
        .of_match       = of_match_ptr("LDO"#num),                      \
        .regulators_node        = of_match_ptr("voltage-regulators"),   \
        .id             = MAX77686_LDO##num,                            \
        .ops            = &max77686_ldo_ops,                            \
        .type           = REGULATOR_VOLTAGE,                            \
        .owner          = THIS_MODULE,                                  \
        .min_uV         = MAX77686_LDO_LOW_MINUV,                       \
        .uV_step        = MAX77686_LDO_LOW_UVSTEP,                      \
        .ramp_delay     = MAX77686_RAMP_DELAY,                          \
        .n_voltages     = MAX77686_VSEL_MASK + 1,                       \
        .vsel_reg       = MAX77686_REG_LDO1CTRL1 + num - 1,             \
        .vsel_mask      = MAX77686_VSEL_MASK,                           \
        .enable_reg     = MAX77686_REG_LDO1CTRL1 + num - 1,             \
        .enable_mask    = MAX77686_OPMODE_MASK                          \
                        << MAX77686_OPMODE_SHIFT,                       \
}
#define regulator_desc_ldo1_low(num)		{                       \
        .name           = "LDO"#num,                                    \
        .of_match       = of_match_ptr("LDO"#num),                      \
        .regulators_node        = of_match_ptr("voltage-regulators"),   \
        .id             = MAX77686_LDO##num,                            \
        .ops            = &max77686_ops,                                \
        .type           = REGULATOR_VOLTAGE,                            \
        .owner          = THIS_MODULE,                                  \
        .min_uV         = MAX77686_LDO_LOW_MINUV,                       \
        .uV_step        = MAX77686_LDO_LOW_UVSTEP,                      \
        .ramp_delay     = MAX77686_RAMP_DELAY,                          \
        .n_voltages     = MAX77686_VSEL_MASK + 1,                       \
        .vsel_reg       = MAX77686_REG_LDO1CTRL1 + num - 1,             \
        .vsel_mask      = MAX77686_VSEL_MASK,                           \
        .enable_reg     = MAX77686_REG_LDO1CTRL1 + num - 1,             \
        .enable_mask    = MAX77686_OPMODE_MASK                          \
                        << MAX77686_OPMODE_SHIFT,                       \
}
#define regulator_desc_buck(num)		{                       \
        .name           = "BUCK"#num,                                   \
        .of_match       = of_match_ptr("BUCK"#num),                     \
        .regulators_node        = of_match_ptr("voltage-regulators"),   \
        .of_parse_cb    = max77686_of_parse_cb,                         \
        .id             = MAX77686_BUCK##num,                           \
        .ops            = &max77686_ops,                                \
        .type           = REGULATOR_VOLTAGE,                            \
        .owner          = THIS_MODULE,                                  \
        .min_uV         = MAX77686_BUCK_MINUV,                          \
        .uV_step        = MAX77686_BUCK_UVSTEP,                         \
        .ramp_delay     = MAX77686_RAMP_DELAY,                          \
        .enable_time    = MAX77686_BUCK_ENABLE_TIME,                    \
        .n_voltages     = MAX77686_VSEL_MASK + 1,                       \
        .vsel_reg       = MAX77686_REG_BUCK5OUT + (num - 5) * 2,        \
        .vsel_mask      = MAX77686_VSEL_MASK,                           \
        .enable_reg     = MAX77686_REG_BUCK5CTRL + (num - 5) * 2,       \
        .enable_mask    = MAX77686_OPMODE_MASK,                         \
}
#define regulator_desc_buck1(num)		{                       \
        .name           = "BUCK"#num,                                   \
        .of_match       = of_match_ptr("BUCK"#num),                     \
        .regulators_node        = of_match_ptr("voltage-regulators"),   \
        .id             = MAX77686_BUCK##num,                           \
        .ops            = &max77686_buck1_ops,                          \
        .type           = REGULATOR_VOLTAGE,                            \
        .owner          = THIS_MODULE,                                  \
        .min_uV         = MAX77686_BUCK_MINUV,                          \
        .uV_step        = MAX77686_BUCK_UVSTEP,                         \
        .ramp_delay     = MAX77686_RAMP_DELAY,                          \
        .enable_time    = MAX77686_BUCK_ENABLE_TIME,                    \
        .n_voltages     = MAX77686_VSEL_MASK + 1,                       \
        .vsel_reg       = MAX77686_REG_BUCK1OUT,                        \
        .vsel_mask      = MAX77686_VSEL_MASK,                           \
        .enable_reg     = MAX77686_REG_BUCK1CTRL,                       \
        .enable_mask    = MAX77686_OPMODE_MASK,                         \
}
#define regulator_desc_buck_dvs(num)		{                       \
        .name           = "BUCK"#num,                                   \
        .of_match       = of_match_ptr("BUCK"#num),                     \
        .regulators_node        = of_match_ptr("voltage-regulators"),   \
        .id             = MAX77686_BUCK##num,                           \
        .ops            = &max77686_buck_dvs_ops,                       \
        .type           = REGULATOR_VOLTAGE,                            \
        .owner          = THIS_MODULE,                                  \
        .min_uV         = MAX77686_DVS_MINUV,                           \
        .uV_step        = MAX77686_DVS_UVSTEP,                          \
        .ramp_delay     = MAX77686_DVS_RAMP_DELAY,                      \
        .enable_time    = MAX77686_DVS_ENABLE_TIME,                     \
        .n_voltages     = MAX77686_DVS_VSEL_MASK + 1,                   \
        .vsel_reg       = MAX77686_REG_BUCK2DVS1 + (num - 2) * 10,      \
        .vsel_mask      = MAX77686_DVS_VSEL_MASK,                       \
        .enable_reg     = MAX77686_REG_BUCK2CTRL1 + (num - 2) * 10,     \
        .enable_mask    = MAX77686_OPMODE_MASK                          \
                        << MAX77686_OPMODE_BUCK234_SHIFT,               \
}
static const struct regulator_desc regulators[] = {
	regulator_desc_ldo1_low(1),
	regulator_desc_ldo_low(2),
	regulator_desc_ldo(3),
	regulator_desc_ldo(4),
	regulator_desc_ldo(5),
	regulator_desc_ldo_low(6),
	regulator_desc_ldo_low(7),
	regulator_desc_ldo_low(8),
	regulator_desc_ldo(9),
	regulator_desc_lpm_ldo(10),
	regulator_desc_lpm_ldo(11),
	regulator_desc_lpm_ldo(12),
	regulator_desc_ldo(13),
	regulator_desc_lpm_ldo(14),
	regulator_desc_ldo_low(15),
	regulator_desc_lpm_ldo(16),
	regulator_desc_ldo(17),
	regulator_desc_ldo(18),
	regulator_desc_ldo(19),
	regulator_desc_ldo(20),
	regulator_desc_ldo(21),
	regulator_desc_ldo(22),
	regulator_desc_ldo(23),
	regulator_desc_ldo(24),
	regulator_desc_ldo(25),
	regulator_desc_ldo(26),
	regulator_desc_buck1(1),
	regulator_desc_buck_dvs(2),
	regulator_desc_buck_dvs(3),
	regulator_desc_buck_dvs(4),
	regulator_desc_buck(5),
	regulator_desc_buck(6),
	regulator_desc_buck(7),
	regulator_desc_buck(8),
	regulator_desc_buck(9),
};
static int max77686_pmic_probe(struct platform_device *pdev)
{
	struct max77686_dev *iodev = dev_get_drvdata(pdev->dev.parent);
	struct max77686_data *max77686;
	int i;
	struct regulator_config config = { };
	dev_dbg(&pdev->dev, "%s\n", __func__);
	max77686 = devm_kzalloc(&pdev->dev, sizeof(struct max77686_data),
				GFP_KERNEL);
	if (!max77686)
		return -ENOMEM;
	config.dev = iodev->dev;
	config.regmap = iodev->regmap;
	config.driver_data = max77686;
	platform_set_drvdata(pdev, max77686);
	for (i = 0; i < MAX77686_REGULATORS; i++) {
		struct regulator_dev *rdev;
		int id = regulators[i].id;
		max77686->opmode[id] = MAX77686_NORMAL;
		rdev = devm_regulator_register(&pdev->dev,
						®ulators[i], &config);
		if (IS_ERR(rdev)) {
			int ret = PTR_ERR(rdev);
			dev_err(&pdev->dev,
				"regulator init failed for %d: %d\n", i, ret);
			return ret;
		}
	}
	return 0;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp | 
| Jonghwa Lee | 141 | 69.80% | 1 | 10.00% | 
| Krzysztof Kozlowski | 30 | 14.85% | 4 | 40.00% | 
| Yadwinder Singh Brar | 20 | 9.90% | 2 | 20.00% | 
| Sachin Kamat | 7 | 3.47% | 1 | 10.00% | 
| Axel Lin | 4 | 1.98% | 2 | 20.00% | 
| Total | 202 | 100.00% | 10 | 100.00% | 
static const struct platform_device_id max77686_pmic_id[] = {
	{"max77686-pmic", 0},
	{ },
};
MODULE_DEVICE_TABLE(platform, max77686_pmic_id);
static struct platform_driver max77686_pmic_driver = {
	.driver = {
		.name = "max77686-pmic",
        },
	.probe = max77686_pmic_probe,
	.id_table = max77686_pmic_id,
};
module_platform_driver(max77686_pmic_driver);
MODULE_DESCRIPTION("MAXIM 77686 Regulator Driver");
MODULE_AUTHOR("Chiwoong Byun <woong.byun@samsung.com>");
MODULE_LICENSE("GPL");
Overall Contributors
| Person | Tokens | Prop | Commits | CommitProp | 
| Jonghwa Lee | 611 | 36.18% | 1 | 3.70% | 
| Yadwinder Singh Brar | 575 | 34.04% | 6 | 22.22% | 
| Krzysztof Kozlowski | 377 | 22.32% | 10 | 37.04% | 
| Axel Lin | 80 | 4.74% | 4 | 14.81% | 
| Joe Perches | 17 | 1.01% | 1 | 3.70% | 
| Thiago Farina | 16 | 0.95% | 1 | 3.70% | 
| Sachin Kamat | 7 | 0.41% | 1 | 3.70% | 
| Bhumika Goyal | 4 | 0.24% | 1 | 3.70% | 
| Fabio Estevam | 1 | 0.06% | 1 | 3.70% | 
| Javier Martinez Canillas | 1 | 0.06% | 1 | 3.70% | 
| Total | 1689 | 100.00% | 27 | 100.00% | 
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