[mirror_ubuntu-hirsute-kernel.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/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

/*
 * 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 {
	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;
	}
}

/* Some BUCKS supports Normal[ON/OFF] mode during suspend */
static int max77686_buck_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_NORMAL;
		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;

	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_NORMAL;
		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[rdev_get_id(rdev)] = 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);

	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 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,
};

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_buck_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_buck_set_suspend_disable,
};

#define regulator_desc_ldo(num)		{				\
	.name		= "LDO"#num,					\
	.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,					\
	.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,					\
	.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,					\
	.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,					\
	.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,					\
	.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,					\
	.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),
};

#ifdef CONFIG_OF
static int max77686_pmic_dt_parse_pdata(struct platform_device *pdev,
					struct max77686_platform_data *pdata)
{
	struct max77686_dev *iodev = dev_get_drvdata(pdev->dev.parent);
	struct device_node *pmic_np, *regulators_np;
	struct max77686_regulator_data *rdata;
	struct of_regulator_match rmatch;
	unsigned int i;

	pmic_np = iodev->dev->of_node;
	regulators_np = of_get_child_by_name(pmic_np, "voltage-regulators");
	if (!regulators_np) {
		dev_err(&pdev->dev, "could not find regulators sub-node\n");
		return -EINVAL;
	}

	pdata->num_regulators = ARRAY_SIZE(regulators);
	rdata = devm_kzalloc(&pdev->dev, sizeof(*rdata) *
			     pdata->num_regulators, GFP_KERNEL);
	if (!rdata) {
		of_node_put(regulators_np);
		return -ENOMEM;
	}

	for (i = 0; i < pdata->num_regulators; i++) {
		rmatch.name = regulators[i].name;
		rmatch.init_data = NULL;
		rmatch.of_node = NULL;
		of_regulator_match(&pdev->dev, regulators_np, &rmatch, 1);
		rdata[i].initdata = rmatch.init_data;
		rdata[i].of_node = rmatch.of_node;
	}

	pdata->regulators = rdata;
	of_node_put(regulators_np);

	return 0;
}
#else
static int max77686_pmic_dt_parse_pdata(struct platform_device *pdev,
					struct max77686_platform_data *pdata)
{
	return 0;
}
#endif /* CONFIG_OF */

static int max77686_pmic_probe(struct platform_device *pdev)
{
	struct max77686_dev *iodev = dev_get_drvdata(pdev->dev.parent);
	struct max77686_platform_data *pdata = dev_get_platdata(iodev->dev);
	struct max77686_data *max77686;
	int i, ret = 0;
	struct regulator_config config = { };

	dev_dbg(&pdev->dev, "%s\n", __func__);

	if (!pdata) {
		dev_err(&pdev->dev, "no platform data found for regulator\n");
		return -ENODEV;
	}

	if (iodev->dev->of_node) {
		ret = max77686_pmic_dt_parse_pdata(pdev, pdata);
		if (ret)
			return ret;
	}

	if (pdata->num_regulators != MAX77686_REGULATORS) {
		dev_err(&pdev->dev,
			"Invalid initial data for regulator's initialiation\n");
		return -EINVAL;
	}

	max77686 = devm_kzalloc(&pdev->dev, sizeof(struct max77686_data),
				GFP_KERNEL);
	if (!max77686)
		return -ENOMEM;

	config.dev = &pdev->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;

		config.init_data = pdata->regulators[i].initdata;
		config.of_node = pdata->regulators[i].of_node;

		max77686->opmode[i] = regulators[i].enable_mask >>
						max77686_get_opmode_shift(i);
		rdev = devm_regulator_register(&pdev->dev,
						&regulators[i], &config);
		if (IS_ERR(rdev)) {
			dev_err(&pdev->dev,
				"regulator init failed for %d\n", i);
			return PTR_ERR(rdev);
		}
	}

	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",
		.owner = THIS_MODULE,
	},
	.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>
	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>
4706fcab	33	#include <linux/regulator/of_regulator.h>
133d4016 JL	34	#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
852abad2 YSB	43	#define MAX77686_RAMP_DELAY 100000 /* uV/us */
852abad2 YSB	44	#define MAX77686_DVS_RAMP_DELAY 27500 /* uV/us */
133d4016 JL	45	#define MAX77686_DVS_MINUV 600000
	46	#define MAX77686_DVS_UVSTEP 12500
	47
7636f19c KK	48	/*
	49	* Values used for configuring LDOs and bucks.
	50	* Forcing low power mode: LDO1, 3-5, 9, 13, 17-26
	51	*/
	52	#define MAX77686_LDO_LOWPOWER 0x1
	53	/*
	54	* On/off controlled by PWRREQ:
	55	* - LDO2, 6-8, 10-12, 14-16
	56	* - buck[1234]
	57	*/
	58	#define MAX77686_OFF_PWRREQ 0x1
	59	/* Low power mode controlled by PWRREQ: All LDOs */
	60	#define MAX77686_LDO_LOWPOWER_PWRREQ 0x2
	61	/* Forcing low power mode: buck[234] */
	62	#define MAX77686_BUCK_LOWPOWER 0x2
	63	#define MAX77686_NORMAL 0x3
	64
133d4016 JL	65	#define MAX77686_OPMODE_SHIFT 6
	66	#define MAX77686_OPMODE_BUCK234_SHIFT 4
	67	#define MAX77686_OPMODE_MASK 0x3
	68
	69	#define MAX77686_VSEL_MASK 0x3F
	70	#define MAX77686_DVS_VSEL_MASK 0xFF
	71
	72	#define MAX77686_RAMP_RATE_MASK 0xC0
	73
	74	#define MAX77686_REGULATORS MAX77686_REG_MAX
	75	#define MAX77686_LDOS 26
	76
	77	enum max77686_ramp_rate {
	78	RAMP_RATE_13P75MV,
	79	RAMP_RATE_27P5MV,
	80	RAMP_RATE_55MV,
	81	RAMP_RATE_NO_CTRL, /* 100mV/us */
	82	};
	83
	84	struct max77686_data {
6d2c896b	85	unsigned int opmode[MAX77686_REGULATORS];
133d4016 JL	86	};
133d4016 JL	87
68c5d186 KK	88	static unsigned int max77686_get_opmode_shift(int id)
	89	{
	90	switch (id) {
	91	case MAX77686_BUCK1:
	92	case MAX77686_BUCK5 ... MAX77686_BUCK9:
	93	return 0;
	94	case MAX77686_BUCK2 ... MAX77686_BUCK4:
	95	return MAX77686_OPMODE_BUCK234_SHIFT;
	96	default:
	97	/* all LDOs */
	98	return MAX77686_OPMODE_SHIFT;
	99	}
	100	}
	101
15282ba9 YSB	102	/* Some BUCKS supports Normal[ON/OFF] mode during suspend */
	103	static int max77686_buck_set_suspend_disable(struct regulator_dev *rdev)
	104	{
68c5d186	105	unsigned int val, shift;
15282ba9	106	struct max77686_data *max77686 = rdev_get_drvdata(rdev);
3ecf198e	107	int ret, id = rdev_get_id(rdev);
15282ba9	108
68c5d186 KK	109	shift = max77686_get_opmode_shift(id);
68c5d186 KK	110	val = MAX77686_OFF_PWRREQ;
15282ba9	111
3ecf198e	112	ret = regmap_update_bits(rdev->regmap, rdev->desc->enable_reg,
68c5d186	113	rdev->desc->enable_mask, val << shift);
3ecf198e AL	114	if (ret)
	115	return ret;
	116
40e72149	117	max77686->opmode[id] = val;
3ecf198e	118	return 0;
15282ba9 YSB	119	}
	120
	121	/* Some LDOs supports [LPM/Normal]ON mode during suspend state */
	122	static int max77686_set_suspend_mode(struct regulator_dev *rdev,
	123	unsigned int mode)
	124	{
	125	struct max77686_data *max77686 = rdev_get_drvdata(rdev);
	126	unsigned int val;
3ecf198e	127	int ret, id = rdev_get_id(rdev);
15282ba9 YSB	128
15282ba9 YSB	129	/* BUCK[5-9] doesn't support this feature */
40e72149	130	if (id >= MAX77686_BUCK5)
15282ba9 YSB	131	return 0;
	132
	133	switch (mode) {
	134	case REGULATOR_MODE_IDLE: /* ON in LP Mode */
68c5d186	135	val = MAX77686_LDO_LOWPOWER_PWRREQ;
15282ba9 YSB	136	break;
15282ba9 YSB	137	case REGULATOR_MODE_NORMAL: /* ON in Normal Mode */
68c5d186	138	val = MAX77686_NORMAL;
15282ba9 YSB	139	break;
	140	default:
	141	pr_warn("%s: regulator_suspend_mode : 0x%x not supported\n",
	142	rdev->desc->name, mode);
	143	return -EINVAL;
	144	}
	145
3ecf198e	146	ret = regmap_update_bits(rdev->regmap, rdev->desc->enable_reg,
68c5d186 KK	147	rdev->desc->enable_mask,
68c5d186 KK	148	val << MAX77686_OPMODE_SHIFT);
3ecf198e AL	149	if (ret)
	150	return ret;
	151
40e72149	152	max77686->opmode[id] = val;
3ecf198e	153	return 0;
15282ba9 YSB	154	}
	155
	156	/* Some LDOs supports LPM-ON/OFF/Normal-ON mode during suspend state */
	157	static int max77686_ldo_set_suspend_mode(struct regulator_dev *rdev,
	158	unsigned int mode)
	159	{
	160	unsigned int val;
	161	struct max77686_data *max77686 = rdev_get_drvdata(rdev);
3ecf198e	162	int ret;
15282ba9 YSB	163
	164	switch (mode) {
	165	case REGULATOR_MODE_STANDBY: /* switch off */
68c5d186	166	val = MAX77686_OFF_PWRREQ;
15282ba9 YSB	167	break;
15282ba9 YSB	168	case REGULATOR_MODE_IDLE: /* ON in LP Mode */
68c5d186	169	val = MAX77686_LDO_LOWPOWER_PWRREQ;
15282ba9 YSB	170	break;
15282ba9 YSB	171	case REGULATOR_MODE_NORMAL: /* ON in Normal Mode */
68c5d186	172	val = MAX77686_NORMAL;
15282ba9 YSB	173	break;
	174	default:
	175	pr_warn("%s: regulator_suspend_mode : 0x%x not supported\n",
	176	rdev->desc->name, mode);
	177	return -EINVAL;
	178	}
	179
3ecf198e	180	ret = regmap_update_bits(rdev->regmap, rdev->desc->enable_reg,
68c5d186 KK	181	rdev->desc->enable_mask,
68c5d186 KK	182	val << MAX77686_OPMODE_SHIFT);
3ecf198e AL	183	if (ret)
	184	return ret;
	185
40e72149	186	max77686->opmode[rdev_get_id(rdev)] = val;
3ecf198e	187	return 0;
15282ba9 YSB	188	}
15282ba9 YSB	189
38d34035	190	static int max77686_enable(struct regulator_dev *rdev)
6d2c896b YSB	191	{
6d2c896b YSB	192	struct max77686_data *max77686 = rdev_get_drvdata(rdev);
68c5d186 KK	193	unsigned int shift;
	194	int id = rdev_get_id(rdev);
	195
	196	shift = max77686_get_opmode_shift(id);
6d2c896b YSB	197
	198	return regmap_update_bits(rdev->regmap, rdev->desc->enable_reg,
	199	rdev->desc->enable_mask,
68c5d186	200	max77686->opmode[id] << shift);
6d2c896b YSB	201	}
6d2c896b YSB	202
f503071b YSB	203	static int max77686_set_ramp_delay(struct regulator_dev *rdev, int ramp_delay)
	204	{
	205	unsigned int ramp_value = RAMP_RATE_NO_CTRL;
	206
	207	switch (ramp_delay) {
	208	case 1 ... 13750:
	209	ramp_value = RAMP_RATE_13P75MV;
	210	break;
	211	case 13751 ... 27500:
	212	ramp_value = RAMP_RATE_27P5MV;
	213	break;
	214	case 27501 ... 55000:
	215	ramp_value = RAMP_RATE_55MV;
	216	break;
	217	case 55001 ... 100000:
	218	break;
	219	default:
	220	pr_warn("%s: ramp_delay: %d not supported, setting 100000\n",
	221	rdev->desc->name, ramp_delay);
	222	}
	223
	224	return regmap_update_bits(rdev->regmap, rdev->desc->enable_reg,
	225	MAX77686_RAMP_RATE_MASK, ramp_value << 6);
	226	}
	227
133d4016 JL	228	static struct regulator_ops max77686_ops = {
133d4016 JL	229	.list_voltage = regulator_list_voltage_linear,
2e3f7f26	230	.map_voltage = regulator_map_voltage_linear,
133d4016	231	.is_enabled = regulator_is_enabled_regmap,
6d2c896b	232	.enable = max77686_enable,
133d4016 JL	233	.disable = regulator_disable_regmap,
	234	.get_voltage_sel = regulator_get_voltage_sel_regmap,
	235	.set_voltage_sel = regulator_set_voltage_sel_regmap,
852abad2	236	.set_voltage_time_sel = regulator_set_voltage_time_sel,
15282ba9 YSB	237	.set_suspend_mode = max77686_set_suspend_mode,
	238	};
	239
	240	static struct regulator_ops max77686_ldo_ops = {
	241	.list_voltage = regulator_list_voltage_linear,
	242	.map_voltage = regulator_map_voltage_linear,
	243	.is_enabled = regulator_is_enabled_regmap,
	244	.enable = max77686_enable,
133d4016 JL	245	.disable = regulator_disable_regmap,
	246	.get_voltage_sel = regulator_get_voltage_sel_regmap,
	247	.set_voltage_sel = regulator_set_voltage_sel_regmap,
852abad2	248	.set_voltage_time_sel = regulator_set_voltage_time_sel,
15282ba9 YSB	249	.set_suspend_mode = max77686_ldo_set_suspend_mode,
	250	};
	251
	252	static struct regulator_ops max77686_buck1_ops = {
	253	.list_voltage = regulator_list_voltage_linear,
	254	.map_voltage = regulator_map_voltage_linear,
	255	.is_enabled = regulator_is_enabled_regmap,
	256	.enable = max77686_enable,
	257	.disable = regulator_disable_regmap,
	258	.get_voltage_sel = regulator_get_voltage_sel_regmap,
	259	.set_voltage_sel = regulator_set_voltage_sel_regmap,
	260	.set_voltage_time_sel = regulator_set_voltage_time_sel,
	261	.set_suspend_disable = max77686_buck_set_suspend_disable,
133d4016 JL	262	};
	263
	264	static struct regulator_ops max77686_buck_dvs_ops = {
	265	.list_voltage = regulator_list_voltage_linear,
2e3f7f26	266	.map_voltage = regulator_map_voltage_linear,
133d4016	267	.is_enabled = regulator_is_enabled_regmap,
6d2c896b	268	.enable = max77686_enable,
133d4016 JL	269	.disable = regulator_disable_regmap,
	270	.get_voltage_sel = regulator_get_voltage_sel_regmap,
	271	.set_voltage_sel = regulator_set_voltage_sel_regmap,
852abad2	272	.set_voltage_time_sel = regulator_set_voltage_time_sel,
f503071b	273	.set_ramp_delay = max77686_set_ramp_delay,
15282ba9	274	.set_suspend_disable = max77686_buck_set_suspend_disable,
133d4016 JL	275	};
	276
	277	#define regulator_desc_ldo(num) { \
	278	.name = "LDO"#num, \
	279	.id = MAX77686_LDO##num, \
	280	.ops = &max77686_ops, \
	281	.type = REGULATOR_VOLTAGE, \
	282	.owner = THIS_MODULE, \
	283	.min_uV = MAX77686_LDO_MINUV, \
	284	.uV_step = MAX77686_LDO_UVSTEP, \
852abad2	285	.ramp_delay = MAX77686_RAMP_DELAY, \
133d4016 JL	286	.n_voltages = MAX77686_VSEL_MASK + 1, \
	287	.vsel_reg = MAX77686_REG_LDO1CTRL1 + num - 1, \
	288	.vsel_mask = MAX77686_VSEL_MASK, \
	289	.enable_reg = MAX77686_REG_LDO1CTRL1 + num - 1, \
	290	.enable_mask = MAX77686_OPMODE_MASK \
	291	<< MAX77686_OPMODE_SHIFT, \
	292	}
15282ba9 YSB	293	#define regulator_desc_lpm_ldo(num) { \
	294	.name = "LDO"#num, \
	295	.id = MAX77686_LDO##num, \
	296	.ops = &max77686_ldo_ops, \
	297	.type = REGULATOR_VOLTAGE, \
	298	.owner = THIS_MODULE, \
	299	.min_uV = MAX77686_LDO_MINUV, \
	300	.uV_step = MAX77686_LDO_UVSTEP, \
	301	.ramp_delay = MAX77686_RAMP_DELAY, \
	302	.n_voltages = MAX77686_VSEL_MASK + 1, \
	303	.vsel_reg = MAX77686_REG_LDO1CTRL1 + num - 1, \
	304	.vsel_mask = MAX77686_VSEL_MASK, \
	305	.enable_reg = MAX77686_REG_LDO1CTRL1 + num - 1, \
	306	.enable_mask = MAX77686_OPMODE_MASK \
	307	<< MAX77686_OPMODE_SHIFT, \
	308	}
133d4016	309	#define regulator_desc_ldo_low(num) { \
15282ba9 YSB	310	.name = "LDO"#num, \
	311	.id = MAX77686_LDO##num, \
	312	.ops = &max77686_ldo_ops, \
	313	.type = REGULATOR_VOLTAGE, \
	314	.owner = THIS_MODULE, \
	315	.min_uV = MAX77686_LDO_LOW_MINUV, \
	316	.uV_step = MAX77686_LDO_LOW_UVSTEP, \
	317	.ramp_delay = MAX77686_RAMP_DELAY, \
	318	.n_voltages = MAX77686_VSEL_MASK + 1, \
	319	.vsel_reg = MAX77686_REG_LDO1CTRL1 + num - 1, \
	320	.vsel_mask = MAX77686_VSEL_MASK, \
	321	.enable_reg = MAX77686_REG_LDO1CTRL1 + num - 1, \
	322	.enable_mask = MAX77686_OPMODE_MASK \
	323	<< MAX77686_OPMODE_SHIFT, \
	324	}
	325	#define regulator_desc_ldo1_low(num) { \
133d4016 JL	326	.name = "LDO"#num, \
	327	.id = MAX77686_LDO##num, \
	328	.ops = &max77686_ops, \
	329	.type = REGULATOR_VOLTAGE, \
	330	.owner = THIS_MODULE, \
	331	.min_uV = MAX77686_LDO_LOW_MINUV, \
	332	.uV_step = MAX77686_LDO_LOW_UVSTEP, \
852abad2	333	.ramp_delay = MAX77686_RAMP_DELAY, \
133d4016 JL	334	.n_voltages = MAX77686_VSEL_MASK + 1, \
	335	.vsel_reg = MAX77686_REG_LDO1CTRL1 + num - 1, \
	336	.vsel_mask = MAX77686_VSEL_MASK, \
	337	.enable_reg = MAX77686_REG_LDO1CTRL1 + num - 1, \
	338	.enable_mask = MAX77686_OPMODE_MASK \
	339	<< MAX77686_OPMODE_SHIFT, \
	340	}
	341	#define regulator_desc_buck(num) { \
	342	.name = "BUCK"#num, \
	343	.id = MAX77686_BUCK##num, \
	344	.ops = &max77686_ops, \
	345	.type = REGULATOR_VOLTAGE, \
	346	.owner = THIS_MODULE, \
	347	.min_uV = MAX77686_BUCK_MINUV, \
	348	.uV_step = MAX77686_BUCK_UVSTEP, \
852abad2	349	.ramp_delay = MAX77686_RAMP_DELAY, \
133d4016 JL	350	.n_voltages = MAX77686_VSEL_MASK + 1, \
	351	.vsel_reg = MAX77686_REG_BUCK5OUT + (num - 5) * 2, \
	352	.vsel_mask = MAX77686_VSEL_MASK, \
	353	.enable_reg = MAX77686_REG_BUCK5CTRL + (num - 5) * 2, \
	354	.enable_mask = MAX77686_OPMODE_MASK, \
	355	}
	356	#define regulator_desc_buck1(num) { \
	357	.name = "BUCK"#num, \
	358	.id = MAX77686_BUCK##num, \
15282ba9	359	.ops = &max77686_buck1_ops, \
133d4016 JL	360	.type = REGULATOR_VOLTAGE, \
	361	.owner = THIS_MODULE, \
	362	.min_uV = MAX77686_BUCK_MINUV, \
	363	.uV_step = MAX77686_BUCK_UVSTEP, \
852abad2	364	.ramp_delay = MAX77686_RAMP_DELAY, \
133d4016 JL	365	.n_voltages = MAX77686_VSEL_MASK + 1, \
	366	.vsel_reg = MAX77686_REG_BUCK1OUT, \
	367	.vsel_mask = MAX77686_VSEL_MASK, \
	368	.enable_reg = MAX77686_REG_BUCK1CTRL, \
	369	.enable_mask = MAX77686_OPMODE_MASK, \
	370	}
	371	#define regulator_desc_buck_dvs(num) { \
	372	.name = "BUCK"#num, \
	373	.id = MAX77686_BUCK##num, \
74adfee5	374	.ops = &max77686_buck_dvs_ops, \
133d4016 JL	375	.type = REGULATOR_VOLTAGE, \
	376	.owner = THIS_MODULE, \
	377	.min_uV = MAX77686_DVS_MINUV, \
	378	.uV_step = MAX77686_DVS_UVSTEP, \
852abad2	379	.ramp_delay = MAX77686_DVS_RAMP_DELAY, \
133d4016 JL	380	.n_voltages = MAX77686_DVS_VSEL_MASK + 1, \
	381	.vsel_reg = MAX77686_REG_BUCK2DVS1 + (num - 2) * 10, \
	382	.vsel_mask = MAX77686_DVS_VSEL_MASK, \
	383	.enable_reg = MAX77686_REG_BUCK2CTRL1 + (num - 2) * 10, \
	384	.enable_mask = MAX77686_OPMODE_MASK \
	385	<< MAX77686_OPMODE_BUCK234_SHIFT, \
	386	}
	387
73dbdf8f	388	static const struct regulator_desc regulators[] = {
15282ba9	389	regulator_desc_ldo1_low(1),
133d4016 JL	390	regulator_desc_ldo_low(2),
	391	regulator_desc_ldo(3),
	392	regulator_desc_ldo(4),
	393	regulator_desc_ldo(5),
	394	regulator_desc_ldo_low(6),
	395	regulator_desc_ldo_low(7),
	396	regulator_desc_ldo_low(8),
	397	regulator_desc_ldo(9),
15282ba9 YSB	398	regulator_desc_lpm_ldo(10),
	399	regulator_desc_lpm_ldo(11),
	400	regulator_desc_lpm_ldo(12),
133d4016	401	regulator_desc_ldo(13),
15282ba9	402	regulator_desc_lpm_ldo(14),
133d4016	403	regulator_desc_ldo_low(15),
15282ba9	404	regulator_desc_lpm_ldo(16),
133d4016 JL	405	regulator_desc_ldo(17),
	406	regulator_desc_ldo(18),
	407	regulator_desc_ldo(19),
	408	regulator_desc_ldo(20),
	409	regulator_desc_ldo(21),
	410	regulator_desc_ldo(22),
	411	regulator_desc_ldo(23),
	412	regulator_desc_ldo(24),
	413	regulator_desc_ldo(25),
	414	regulator_desc_ldo(26),
	415	regulator_desc_buck1(1),
	416	regulator_desc_buck_dvs(2),
	417	regulator_desc_buck_dvs(3),
	418	regulator_desc_buck_dvs(4),
	419	regulator_desc_buck(5),
	420	regulator_desc_buck(6),
	421	regulator_desc_buck(7),
	422	regulator_desc_buck(8),
	423	regulator_desc_buck(9),
	424	};
	425
4706fcab	426	#ifdef CONFIG_OF
b19f5758	427	static int max77686_pmic_dt_parse_pdata(struct platform_device *pdev,
4706fcab YSB	428	struct max77686_platform_data *pdata)
4706fcab YSB	429	{
b19f5758	430	struct max77686_dev *iodev = dev_get_drvdata(pdev->dev.parent);
4706fcab YSB	431	struct device_node pmic_np, regulators_np;
	432	struct max77686_regulator_data *rdata;
	433	struct of_regulator_match rmatch;
	434	unsigned int i;
	435
	436	pmic_np = iodev->dev->of_node;
398a6616	437	regulators_np = of_get_child_by_name(pmic_np, "voltage-regulators");
4706fcab	438	if (!regulators_np) {
b19f5758	439	dev_err(&pdev->dev, "could not find regulators sub-node\n");
4706fcab YSB	440	return -EINVAL;
	441	}
	442
	443	pdata->num_regulators = ARRAY_SIZE(regulators);
b19f5758	444	rdata = devm_kzalloc(&pdev->dev, sizeof(rdata)
4706fcab YSB	445	pdata->num_regulators, GFP_KERNEL);
4706fcab YSB	446	if (!rdata) {
da0ee72d	447	of_node_put(regulators_np);
4706fcab YSB	448	return -ENOMEM;
	449	}
	450
	451	for (i = 0; i < pdata->num_regulators; i++) {
	452	rmatch.name = regulators[i].name;
	453	rmatch.init_data = NULL;
d1ef065d	454	rmatch.of_node = NULL;
b19f5758	455	of_regulator_match(&pdev->dev, regulators_np, &rmatch, 1);
4706fcab	456	rdata[i].initdata = rmatch.init_data;
2c58e266	457	rdata[i].of_node = rmatch.of_node;
4706fcab YSB	458	}
	459
	460	pdata->regulators = rdata;
da0ee72d	461	of_node_put(regulators_np);
4706fcab YSB	462
	463	return 0;
	464	}
	465	#else
b19f5758	466	static int max77686_pmic_dt_parse_pdata(struct platform_device *pdev,
4706fcab YSB	467	struct max77686_platform_data *pdata)
	468	{
	469	return 0;
	470	}
	471	#endif /* CONFIG_OF */
	472
a5023574	473	static int max77686_pmic_probe(struct platform_device *pdev)
133d4016 JL	474	{
	475	struct max77686_dev *iodev = dev_get_drvdata(pdev->dev.parent);
	476	struct max77686_platform_data *pdata = dev_get_platdata(iodev->dev);
133d4016	477	struct max77686_data *max77686;
cb44cdea	478	int i, ret = 0;
c59d2a6b	479	struct regulator_config config = { };
133d4016 JL	480
	481	dev_dbg(&pdev->dev, "%s\n", __func__);
	482
4706fcab YSB	483	if (!pdata) {
	484	dev_err(&pdev->dev, "no platform data found for regulator\n");
	485	return -ENODEV;
	486	}
	487
	488	if (iodev->dev->of_node) {
b19f5758	489	ret = max77686_pmic_dt_parse_pdata(pdev, pdata);
4706fcab YSB	490	if (ret)
	491	return ret;
	492	}
	493
	494	if (pdata->num_regulators != MAX77686_REGULATORS) {
ab0d1cbe AL	495	dev_err(&pdev->dev,
	496	"Invalid initial data for regulator's initialiation\n");
	497	return -EINVAL;
	498	}
	499
133d4016 JL	500	max77686 = devm_kzalloc(&pdev->dev, sizeof(struct max77686_data),
	501	GFP_KERNEL);
	502	if (!max77686)
	503	return -ENOMEM;
	504
f503071b YSB	505	config.dev = &pdev->dev;
f503071b YSB	506	config.regmap = iodev->regmap;
6d2c896b	507	config.driver_data = max77686;
133d4016 JL	508	platform_set_drvdata(pdev, max77686);
133d4016 JL	509
ab0d1cbe	510	for (i = 0; i < MAX77686_REGULATORS; i++) {
b0c13e80 KK	511	struct regulator_dev *rdev;
b0c13e80 KK	512
ab0d1cbe	513	config.init_data = pdata->regulators[i].initdata;
2c58e266	514	config.of_node = pdata->regulators[i].of_node;
133d4016	515
68c5d186 KK	516	max77686->opmode[i] = regulators[i].enable_mask >>
68c5d186 KK	517	max77686_get_opmode_shift(i);
b0c13e80	518	rdev = devm_regulator_register(&pdev->dev,
44815b4a	519	&regulators[i], &config);
b0c13e80	520	if (IS_ERR(rdev)) {
f503071b	521	dev_err(&pdev->dev,
133d4016	522	"regulator init failed for %d\n", i);
b0c13e80	523	return PTR_ERR(rdev);
133d4016	524	}
133d4016	525	}
ab0d1cbe	526
133d4016 JL	527	return 0;
	528	}
	529
	530	static const struct platform_device_id max77686_pmic_id[] = {
	531	{"max77686-pmic", 0},
	532	{ },
	533	};
	534	MODULE_DEVICE_TABLE(platform, max77686_pmic_id);
	535
	536	static struct platform_driver max77686_pmic_driver = {
	537	.driver = {
	538	.name = "max77686-pmic",
	539	.owner = THIS_MODULE,
	540	},
	541	.probe = max77686_pmic_probe,
133d4016 JL	542	.id_table = max77686_pmic_id,
	543	};
	544
	545	static int __init max77686_pmic_init(void)
	546	{
	547	return platform_driver_register(&max77686_pmic_driver);
	548	}
	549	subsys_initcall(max77686_pmic_init);
	550
	551	static void __exit max77686_pmic_cleanup(void)
	552	{
	553	platform_driver_unregister(&max77686_pmic_driver);
	554	}
	555	module_exit(max77686_pmic_cleanup);
	556
	557	MODULE_DESCRIPTION("MAXIM 77686 Regulator Driver");
	558	MODULE_AUTHOR("Chiwoong Byun <woong.byun@samsung.com>");
	559	MODULE_LICENSE("GPL");