[linux-2.6-block.git] / drivers / regulator / max77686.c

/*
 * max77686.c - Regulator driver for the Maxim 77686
 *
 * Copyright (C) 2012 Samsung Electronics
 * Chiwoong Byun <woong.byun@smasung.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_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 {
	u64 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;
	}
}

/*
 * 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 (max77686->gpio_enabled & (1 << id))
			return MAX77686_GPIO_CONTROL;
	}

	return MAX77686_NORMAL;
}

/* 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;
}

/* 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;
}

/* 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;
}

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);
}

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);
}

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)) {
		max77686->gpio_enabled |= (1 << desc->id);

		return regmap_update_bits(config->regmap, desc->enable_reg,
					  desc->enable_mask,
					  MAX77686_GPIO_CONTROL);
	}

	return 0;
}

static 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 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 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 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,				\
	.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,				\
	.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,			\
	.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,
						&regulators[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;
}

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,
};

static int __init max77686_pmic_init(void)
{
	return platform_driver_register(&max77686_pmic_driver);
}
subsys_initcall(max77686_pmic_init);

static void __exit max77686_pmic_cleanup(void)
{
	platform_driver_unregister(&max77686_pmic_driver);
}
module_exit(max77686_pmic_cleanup);

MODULE_DESCRIPTION("MAXIM 77686 Regulator Driver");
MODULE_AUTHOR("Chiwoong Byun <woong.byun@samsung.com>");
MODULE_LICENSE("GPL");
Commit	Line	Data
133d4016 JL	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>
133d4016 JL	27	#include <linux/err.h>
133d4016 JL	28	#include <linux/gpio.h>
3307e902	29	#include <linux/of_gpio.h>
133d4016 JL	30	#include <linux/slab.h>
	31	#include <linux/platform_device.h>
	32	#include <linux/regulator/driver.h>
	33	#include <linux/regulator/machine.h>
4706fcab	34	#include <linux/regulator/of_regulator.h>
133d4016 JL	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
852abad2 YSB	44	#define MAX77686_RAMP_DELAY 100000 /* uV/us */
852abad2 YSB	45	#define MAX77686_DVS_RAMP_DELAY 27500 /* uV/us */
133d4016 JL	46	#define MAX77686_DVS_MINUV 600000
	47	#define MAX77686_DVS_UVSTEP 12500
	48
3307e902 KK	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
7636f19c KK	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
133d4016 JL	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 {
3307e902 KK	91	u64 gpio_enabled:MAX77686_REGULATORS;
3307e902 KK	92
eca29da9	93	/* Array indexed by regulator id */
6d2c896b	94	unsigned int opmode[MAX77686_REGULATORS];
133d4016 JL	95	};
133d4016 JL	96
68c5d186 KK	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
3307e902 KK	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
78ce6128 KK	131	/* Some BUCKs and LDOs supports Normal[ON/OFF] mode during suspend */
78ce6128 KK	132	static int max77686_set_suspend_disable(struct regulator_dev *rdev)
15282ba9	133	{
68c5d186	134	unsigned int val, shift;
15282ba9	135	struct max77686_data *max77686 = rdev_get_drvdata(rdev);
3ecf198e	136	int ret, id = rdev_get_id(rdev);
15282ba9	137
68c5d186 KK	138	shift = max77686_get_opmode_shift(id);
68c5d186 KK	139	val = MAX77686_OFF_PWRREQ;
15282ba9	140
3ecf198e	141	ret = regmap_update_bits(rdev->regmap, rdev->desc->enable_reg,
68c5d186	142	rdev->desc->enable_mask, val << shift);
3ecf198e AL	143	if (ret)
	144	return ret;
	145
40e72149	146	max77686->opmode[id] = val;
3ecf198e	147	return 0;
15282ba9 YSB	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;
3ecf198e	156	int ret, id = rdev_get_id(rdev);
15282ba9 YSB	157
15282ba9 YSB	158	/* BUCK[5-9] doesn't support this feature */
40e72149	159	if (id >= MAX77686_BUCK5)
15282ba9 YSB	160	return 0;
	161
	162	switch (mode) {
	163	case REGULATOR_MODE_IDLE: /* ON in LP Mode */
68c5d186	164	val = MAX77686_LDO_LOWPOWER_PWRREQ;
15282ba9 YSB	165	break;
15282ba9 YSB	166	case REGULATOR_MODE_NORMAL: /* ON in Normal Mode */
3307e902	167	val = max77686_map_normal_mode(max77686, id);
15282ba9 YSB	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
3ecf198e	175	ret = regmap_update_bits(rdev->regmap, rdev->desc->enable_reg,
68c5d186 KK	176	rdev->desc->enable_mask,
68c5d186 KK	177	val << MAX77686_OPMODE_SHIFT);
3ecf198e AL	178	if (ret)
	179	return ret;
	180
40e72149	181	max77686->opmode[id] = val;
3ecf198e	182	return 0;
15282ba9 YSB	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);
3307e902	191	int ret, id = rdev_get_id(rdev);
15282ba9 YSB	192
	193	switch (mode) {
	194	case REGULATOR_MODE_STANDBY: /* switch off */
68c5d186	195	val = MAX77686_OFF_PWRREQ;
15282ba9 YSB	196	break;
15282ba9 YSB	197	case REGULATOR_MODE_IDLE: /* ON in LP Mode */
68c5d186	198	val = MAX77686_LDO_LOWPOWER_PWRREQ;
15282ba9 YSB	199	break;
15282ba9 YSB	200	case REGULATOR_MODE_NORMAL: /* ON in Normal Mode */
3307e902	201	val = max77686_map_normal_mode(max77686, id);
15282ba9 YSB	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
3ecf198e	209	ret = regmap_update_bits(rdev->regmap, rdev->desc->enable_reg,
68c5d186 KK	210	rdev->desc->enable_mask,
68c5d186 KK	211	val << MAX77686_OPMODE_SHIFT);
3ecf198e AL	212	if (ret)
	213	return ret;
	214
3307e902	215	max77686->opmode[id] = val;
3ecf198e	216	return 0;
15282ba9 YSB	217	}
15282ba9 YSB	218
38d34035	219	static int max77686_enable(struct regulator_dev *rdev)
6d2c896b YSB	220	{
6d2c896b YSB	221	struct max77686_data *max77686 = rdev_get_drvdata(rdev);
68c5d186 KK	222	unsigned int shift;
	223	int id = rdev_get_id(rdev);
	224
	225	shift = max77686_get_opmode_shift(id);
6d2c896b	226
78ce6128	227	if (max77686->opmode[id] == MAX77686_OFF_PWRREQ)
3307e902	228	max77686->opmode[id] = max77686_map_normal_mode(max77686, id);
78ce6128	229
6d2c896b YSB	230	return regmap_update_bits(rdev->regmap, rdev->desc->enable_reg,
6d2c896b YSB	231	rdev->desc->enable_mask,
68c5d186	232	max77686->opmode[id] << shift);
6d2c896b YSB	233	}
6d2c896b YSB	234
f503071b YSB	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
3307e902 KK	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
133d4016 JL	290	static struct regulator_ops max77686_ops = {
133d4016 JL	291	.list_voltage = regulator_list_voltage_linear,
2e3f7f26	292	.map_voltage = regulator_map_voltage_linear,
133d4016	293	.is_enabled = regulator_is_enabled_regmap,
6d2c896b	294	.enable = max77686_enable,
133d4016 JL	295	.disable = regulator_disable_regmap,
	296	.get_voltage_sel = regulator_get_voltage_sel_regmap,
	297	.set_voltage_sel = regulator_set_voltage_sel_regmap,
852abad2	298	.set_voltage_time_sel = regulator_set_voltage_time_sel,
15282ba9 YSB	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,
133d4016 JL	307	.disable = regulator_disable_regmap,
	308	.get_voltage_sel = regulator_get_voltage_sel_regmap,
	309	.set_voltage_sel = regulator_set_voltage_sel_regmap,
852abad2	310	.set_voltage_time_sel = regulator_set_voltage_time_sel,
15282ba9	311	.set_suspend_mode = max77686_ldo_set_suspend_mode,
78ce6128	312	.set_suspend_disable = max77686_set_suspend_disable,
15282ba9 YSB	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,
78ce6128	324	.set_suspend_disable = max77686_set_suspend_disable,
133d4016 JL	325	};
	326
	327	static struct regulator_ops max77686_buck_dvs_ops = {
	328	.list_voltage = regulator_list_voltage_linear,
2e3f7f26	329	.map_voltage = regulator_map_voltage_linear,
133d4016	330	.is_enabled = regulator_is_enabled_regmap,
6d2c896b	331	.enable = max77686_enable,
133d4016 JL	332	.disable = regulator_disable_regmap,
	333	.get_voltage_sel = regulator_get_voltage_sel_regmap,
	334	.set_voltage_sel = regulator_set_voltage_sel_regmap,
852abad2	335	.set_voltage_time_sel = regulator_set_voltage_time_sel,
f503071b	336	.set_ramp_delay = max77686_set_ramp_delay,
78ce6128	337	.set_suspend_disable = max77686_set_suspend_disable,
133d4016 JL	338	};
	339
	340	#define regulator_desc_ldo(num) { \
	341	.name = "LDO"#num, \
04803952 KK	342	.of_match = of_match_ptr("LDO"#num), \
04803952 KK	343	.regulators_node = of_match_ptr("voltage-regulators"), \
3307e902	344	.of_parse_cb = max77686_of_parse_cb, \
133d4016 JL	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, \
852abad2	351	.ramp_delay = MAX77686_RAMP_DELAY, \
133d4016 JL	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	}
15282ba9 YSB	359	#define regulator_desc_lpm_ldo(num) { \
15282ba9 YSB	360	.name = "LDO"#num, \
04803952 KK	361	.of_match = of_match_ptr("LDO"#num), \
04803952 KK	362	.regulators_node = of_match_ptr("voltage-regulators"), \
15282ba9 YSB	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	}
133d4016	377	#define regulator_desc_ldo_low(num) { \
15282ba9	378	.name = "LDO"#num, \
04803952 KK	379	.of_match = of_match_ptr("LDO"#num), \
04803952 KK	380	.regulators_node = of_match_ptr("voltage-regulators"), \
15282ba9 YSB	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) { \
133d4016	396	.name = "LDO"#num, \
04803952 KK	397	.of_match = of_match_ptr("LDO"#num), \
04803952 KK	398	.regulators_node = of_match_ptr("voltage-regulators"), \
133d4016 JL	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, \
852abad2	405	.ramp_delay = MAX77686_RAMP_DELAY, \
133d4016 JL	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, \
04803952 KK	415	.of_match = of_match_ptr("BUCK"#num), \
04803952 KK	416	.regulators_node = of_match_ptr("voltage-regulators"), \
3307e902	417	.of_parse_cb = max77686_of_parse_cb, \
133d4016 JL	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, \
852abad2	424	.ramp_delay = MAX77686_RAMP_DELAY, \
133d4016 JL	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, \
04803952 KK	433	.of_match = of_match_ptr("BUCK"#num), \
04803952 KK	434	.regulators_node = of_match_ptr("voltage-regulators"), \
133d4016	435	.id = MAX77686_BUCK##num, \
15282ba9	436	.ops = &max77686_buck1_ops, \
133d4016 JL	437	.type = REGULATOR_VOLTAGE, \
	438	.owner = THIS_MODULE, \
	439	.min_uV = MAX77686_BUCK_MINUV, \
	440	.uV_step = MAX77686_BUCK_UVSTEP, \
852abad2	441	.ramp_delay = MAX77686_RAMP_DELAY, \
133d4016 JL	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, \
04803952 KK	450	.of_match = of_match_ptr("BUCK"#num), \
04803952 KK	451	.regulators_node = of_match_ptr("voltage-regulators"), \
133d4016	452	.id = MAX77686_BUCK##num, \
74adfee5	453	.ops = &max77686_buck_dvs_ops, \
133d4016 JL	454	.type = REGULATOR_VOLTAGE, \
	455	.owner = THIS_MODULE, \
	456	.min_uV = MAX77686_DVS_MINUV, \
	457	.uV_step = MAX77686_DVS_UVSTEP, \
852abad2	458	.ramp_delay = MAX77686_DVS_RAMP_DELAY, \
133d4016 JL	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
73dbdf8f	467	static const struct regulator_desc regulators[] = {
15282ba9	468	regulator_desc_ldo1_low(1),
133d4016 JL	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),
15282ba9 YSB	477	regulator_desc_lpm_ldo(10),
	478	regulator_desc_lpm_ldo(11),
	479	regulator_desc_lpm_ldo(12),
133d4016	480	regulator_desc_ldo(13),
15282ba9	481	regulator_desc_lpm_ldo(14),
133d4016	482	regulator_desc_ldo_low(15),
15282ba9	483	regulator_desc_lpm_ldo(16),
133d4016 JL	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
a5023574	505	static int max77686_pmic_probe(struct platform_device *pdev)
133d4016 JL	506	{
133d4016 JL	507	struct max77686_dev *iodev = dev_get_drvdata(pdev->dev.parent);
133d4016	508	struct max77686_data *max77686;
04803952	509	int i;
c59d2a6b	510	struct regulator_config config = { };
133d4016 JL	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
04803952	519	config.dev = iodev->dev;
f503071b	520	config.regmap = iodev->regmap;
6d2c896b	521	config.driver_data = max77686;
133d4016 JL	522	platform_set_drvdata(pdev, max77686);
133d4016 JL	523
ab0d1cbe	524	for (i = 0; i < MAX77686_REGULATORS; i++) {
b0c13e80	525	struct regulator_dev *rdev;
eca29da9	526	int id = regulators[i].id;
b0c13e80	527
4524df83	528	max77686->opmode[id] = MAX77686_NORMAL;
b0c13e80	529	rdev = devm_regulator_register(&pdev->dev,
44815b4a	530	&regulators[i], &config);
b0c13e80	531	if (IS_ERR(rdev)) {
04803952	532	int ret = PTR_ERR(rdev);
f503071b	533	dev_err(&pdev->dev,
04803952 KK	534	"regulator init failed for %d: %d\n", i, ret);
04803952 KK	535	return ret;
133d4016	536	}
133d4016	537	}
ab0d1cbe	538
133d4016 JL	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",
133d4016 JL	551	},
133d4016 JL	552	.probe = max77686_pmic_probe,
133d4016 JL	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");