[mirror_ubuntu-artful-kernel.git] / 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;
	}
}

/*
 * 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;
}

/* 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)) {
		set_bit(desc->id, max77686->gpio_enabled);

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

	return 0;
}

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,
						&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,
};

module_platform_driver(max77686_pmic_driver);

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
e4e8cccc	5	* Chiwoong Byun <woong.byun@samsung.com>
133d4016 JL	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
a9597305 KK	44	#define MAX77686_BUCK_ENABLE_TIME 40 /* us */
a9597305 KK	45	#define MAX77686_DVS_ENABLE_TIME 22 /* us */
852abad2 YSB	46	#define MAX77686_RAMP_DELAY 100000 /* uV/us */
852abad2 YSB	47	#define MAX77686_DVS_RAMP_DELAY 27500 /* uV/us */
133d4016 JL	48	#define MAX77686_DVS_MINUV 600000
	49	#define MAX77686_DVS_UVSTEP 12500
	50
3307e902 KK	51	/*
	52	* Value for configuring buck[89] and LDO{20,21,22} as GPIO control.
	53	* It is the same as 'off' for other regulators.
	54	*/
	55	#define MAX77686_GPIO_CONTROL 0x0
7636f19c KK	56	/*
	57	* Values used for configuring LDOs and bucks.
	58	* Forcing low power mode: LDO1, 3-5, 9, 13, 17-26
	59	*/
	60	#define MAX77686_LDO_LOWPOWER 0x1
	61	/*
	62	* On/off controlled by PWRREQ:
	63	* - LDO2, 6-8, 10-12, 14-16
	64	* - buck[1234]
	65	*/
	66	#define MAX77686_OFF_PWRREQ 0x1
	67	/* Low power mode controlled by PWRREQ: All LDOs */
	68	#define MAX77686_LDO_LOWPOWER_PWRREQ 0x2
	69	/* Forcing low power mode: buck[234] */
	70	#define MAX77686_BUCK_LOWPOWER 0x2
	71	#define MAX77686_NORMAL 0x3
	72
133d4016 JL	73	#define MAX77686_OPMODE_SHIFT 6
	74	#define MAX77686_OPMODE_BUCK234_SHIFT 4
	75	#define MAX77686_OPMODE_MASK 0x3
	76
	77	#define MAX77686_VSEL_MASK 0x3F
	78	#define MAX77686_DVS_VSEL_MASK 0xFF
	79
	80	#define MAX77686_RAMP_RATE_MASK 0xC0
	81
	82	#define MAX77686_REGULATORS MAX77686_REG_MAX
	83	#define MAX77686_LDOS 26
	84
	85	enum max77686_ramp_rate {
	86	RAMP_RATE_13P75MV,
	87	RAMP_RATE_27P5MV,
	88	RAMP_RATE_55MV,
	89	RAMP_RATE_NO_CTRL, /* 100mV/us */
	90	};
	91
	92	struct max77686_data {
c53403a3	93	DECLARE_BITMAP(gpio_enabled, MAX77686_REGULATORS);
3307e902	94
eca29da9	95	/* Array indexed by regulator id */
6d2c896b	96	unsigned int opmode[MAX77686_REGULATORS];
133d4016 JL	97	};
133d4016 JL	98
68c5d186 KK	99	static unsigned int max77686_get_opmode_shift(int id)
	100	{
	101	switch (id) {
	102	case MAX77686_BUCK1:
	103	case MAX77686_BUCK5 ... MAX77686_BUCK9:
	104	return 0;
	105	case MAX77686_BUCK2 ... MAX77686_BUCK4:
	106	return MAX77686_OPMODE_BUCK234_SHIFT;
	107	default:
	108	/* all LDOs */
	109	return MAX77686_OPMODE_SHIFT;
	110	}
	111	}
	112
3307e902 KK	113	/*
	114	* When regulator is configured for GPIO control then it
	115	* replaces "normal" mode. Any change from low power mode to normal
	116	* should actually change to GPIO control.
	117	* Map normal mode to proper value for such regulators.
	118	*/
	119	static unsigned int max77686_map_normal_mode(struct max77686_data *max77686,
	120	int id)
	121	{
	122	switch (id) {
	123	case MAX77686_BUCK8:
	124	case MAX77686_BUCK9:
	125	case MAX77686_LDO20 ... MAX77686_LDO22:
c53403a3	126	if (test_bit(id, max77686->gpio_enabled))
3307e902 KK	127	return MAX77686_GPIO_CONTROL;
	128	}
	129
	130	return MAX77686_NORMAL;
	131	}
	132
78ce6128 KK	133	/* Some BUCKs and LDOs supports Normal[ON/OFF] mode during suspend */
78ce6128 KK	134	static int max77686_set_suspend_disable(struct regulator_dev *rdev)
15282ba9	135	{
68c5d186	136	unsigned int val, shift;
15282ba9	137	struct max77686_data *max77686 = rdev_get_drvdata(rdev);
3ecf198e	138	int ret, id = rdev_get_id(rdev);
15282ba9	139
68c5d186 KK	140	shift = max77686_get_opmode_shift(id);
68c5d186 KK	141	val = MAX77686_OFF_PWRREQ;
15282ba9	142
3ecf198e	143	ret = regmap_update_bits(rdev->regmap, rdev->desc->enable_reg,
68c5d186	144	rdev->desc->enable_mask, val << shift);
3ecf198e AL	145	if (ret)
	146	return ret;
	147
40e72149	148	max77686->opmode[id] = val;
3ecf198e	149	return 0;
15282ba9 YSB	150	}
	151
	152	/* Some LDOs supports [LPM/Normal]ON mode during suspend state */
	153	static int max77686_set_suspend_mode(struct regulator_dev *rdev,
	154	unsigned int mode)
	155	{
	156	struct max77686_data *max77686 = rdev_get_drvdata(rdev);
	157	unsigned int val;
3ecf198e	158	int ret, id = rdev_get_id(rdev);
15282ba9 YSB	159
15282ba9 YSB	160	/* BUCK[5-9] doesn't support this feature */
40e72149	161	if (id >= MAX77686_BUCK5)
15282ba9 YSB	162	return 0;
	163
	164	switch (mode) {
	165	case REGULATOR_MODE_IDLE: /* ON in LP Mode */
68c5d186	166	val = MAX77686_LDO_LOWPOWER_PWRREQ;
15282ba9 YSB	167	break;
15282ba9 YSB	168	case REGULATOR_MODE_NORMAL: /* ON in Normal Mode */
3307e902	169	val = max77686_map_normal_mode(max77686, id);
15282ba9 YSB	170	break;
	171	default:
	172	pr_warn("%s: regulator_suspend_mode : 0x%x not supported\n",
	173	rdev->desc->name, mode);
	174	return -EINVAL;
	175	}
	176
3ecf198e	177	ret = regmap_update_bits(rdev->regmap, rdev->desc->enable_reg,
68c5d186 KK	178	rdev->desc->enable_mask,
68c5d186 KK	179	val << MAX77686_OPMODE_SHIFT);
3ecf198e AL	180	if (ret)
	181	return ret;
	182
40e72149	183	max77686->opmode[id] = val;
3ecf198e	184	return 0;
15282ba9 YSB	185	}
	186
	187	/* Some LDOs supports LPM-ON/OFF/Normal-ON mode during suspend state */
	188	static int max77686_ldo_set_suspend_mode(struct regulator_dev *rdev,
	189	unsigned int mode)
	190	{
	191	unsigned int val;
	192	struct max77686_data *max77686 = rdev_get_drvdata(rdev);
3307e902	193	int ret, id = rdev_get_id(rdev);
15282ba9 YSB	194
	195	switch (mode) {
	196	case REGULATOR_MODE_STANDBY: /* switch off */
68c5d186	197	val = MAX77686_OFF_PWRREQ;
15282ba9 YSB	198	break;
15282ba9 YSB	199	case REGULATOR_MODE_IDLE: /* ON in LP Mode */
68c5d186	200	val = MAX77686_LDO_LOWPOWER_PWRREQ;
15282ba9 YSB	201	break;
15282ba9 YSB	202	case REGULATOR_MODE_NORMAL: /* ON in Normal Mode */
3307e902	203	val = max77686_map_normal_mode(max77686, id);
15282ba9 YSB	204	break;
	205	default:
	206	pr_warn("%s: regulator_suspend_mode : 0x%x not supported\n",
	207	rdev->desc->name, mode);
	208	return -EINVAL;
	209	}
	210
3ecf198e	211	ret = regmap_update_bits(rdev->regmap, rdev->desc->enable_reg,
68c5d186 KK	212	rdev->desc->enable_mask,
68c5d186 KK	213	val << MAX77686_OPMODE_SHIFT);
3ecf198e AL	214	if (ret)
	215	return ret;
	216
3307e902	217	max77686->opmode[id] = val;
3ecf198e	218	return 0;
15282ba9 YSB	219	}
15282ba9 YSB	220
38d34035	221	static int max77686_enable(struct regulator_dev *rdev)
6d2c896b YSB	222	{
6d2c896b YSB	223	struct max77686_data *max77686 = rdev_get_drvdata(rdev);
68c5d186 KK	224	unsigned int shift;
	225	int id = rdev_get_id(rdev);
	226
	227	shift = max77686_get_opmode_shift(id);
6d2c896b	228
78ce6128	229	if (max77686->opmode[id] == MAX77686_OFF_PWRREQ)
3307e902	230	max77686->opmode[id] = max77686_map_normal_mode(max77686, id);
78ce6128	231
6d2c896b YSB	232	return regmap_update_bits(rdev->regmap, rdev->desc->enable_reg,
6d2c896b YSB	233	rdev->desc->enable_mask,
68c5d186	234	max77686->opmode[id] << shift);
6d2c896b YSB	235	}
6d2c896b YSB	236
f503071b YSB	237	static int max77686_set_ramp_delay(struct regulator_dev *rdev, int ramp_delay)
	238	{
	239	unsigned int ramp_value = RAMP_RATE_NO_CTRL;
	240
	241	switch (ramp_delay) {
	242	case 1 ... 13750:
	243	ramp_value = RAMP_RATE_13P75MV;
	244	break;
	245	case 13751 ... 27500:
	246	ramp_value = RAMP_RATE_27P5MV;
	247	break;
	248	case 27501 ... 55000:
	249	ramp_value = RAMP_RATE_55MV;
	250	break;
	251	case 55001 ... 100000:
	252	break;
	253	default:
	254	pr_warn("%s: ramp_delay: %d not supported, setting 100000\n",
	255	rdev->desc->name, ramp_delay);
	256	}
	257
	258	return regmap_update_bits(rdev->regmap, rdev->desc->enable_reg,
	259	MAX77686_RAMP_RATE_MASK, ramp_value << 6);
	260	}
	261
3307e902 KK	262	static int max77686_of_parse_cb(struct device_node *np,
	263	const struct regulator_desc *desc,
	264	struct regulator_config *config)
	265	{
	266	struct max77686_data *max77686 = config->driver_data;
	267
	268	switch (desc->id) {
	269	case MAX77686_BUCK8:
	270	case MAX77686_BUCK9:
	271	case MAX77686_LDO20 ... MAX77686_LDO22:
	272	config->ena_gpio = of_get_named_gpio(np,
	273	"maxim,ena-gpios", 0);
	274	config->ena_gpio_flags = GPIOF_OUT_INIT_HIGH;
	275	config->ena_gpio_initialized = true;
	276	break;
	277	default:
	278	return 0;
	279	}
	280
	281	if (gpio_is_valid(config->ena_gpio)) {
c53403a3	282	set_bit(desc->id, max77686->gpio_enabled);
3307e902 KK	283
	284	return regmap_update_bits(config->regmap, desc->enable_reg,
	285	desc->enable_mask,
	286	MAX77686_GPIO_CONTROL);
	287	}
	288
	289	return 0;
	290	}
	291
404826cb	292	static const struct regulator_ops max77686_ops = {
133d4016	293	.list_voltage = regulator_list_voltage_linear,
2e3f7f26	294	.map_voltage = regulator_map_voltage_linear,
133d4016	295	.is_enabled = regulator_is_enabled_regmap,
6d2c896b	296	.enable = max77686_enable,
133d4016 JL	297	.disable = regulator_disable_regmap,
	298	.get_voltage_sel = regulator_get_voltage_sel_regmap,
	299	.set_voltage_sel = regulator_set_voltage_sel_regmap,
852abad2	300	.set_voltage_time_sel = regulator_set_voltage_time_sel,
15282ba9 YSB	301	.set_suspend_mode = max77686_set_suspend_mode,
	302	};
	303
404826cb	304	static const struct regulator_ops max77686_ldo_ops = {
15282ba9 YSB	305	.list_voltage = regulator_list_voltage_linear,
	306	.map_voltage = regulator_map_voltage_linear,
	307	.is_enabled = regulator_is_enabled_regmap,
	308	.enable = max77686_enable,
133d4016 JL	309	.disable = regulator_disable_regmap,
	310	.get_voltage_sel = regulator_get_voltage_sel_regmap,
	311	.set_voltage_sel = regulator_set_voltage_sel_regmap,
852abad2	312	.set_voltage_time_sel = regulator_set_voltage_time_sel,
15282ba9	313	.set_suspend_mode = max77686_ldo_set_suspend_mode,
78ce6128	314	.set_suspend_disable = max77686_set_suspend_disable,
15282ba9 YSB	315	};
15282ba9 YSB	316
404826cb	317	static const struct regulator_ops max77686_buck1_ops = {
15282ba9 YSB	318	.list_voltage = regulator_list_voltage_linear,
	319	.map_voltage = regulator_map_voltage_linear,
	320	.is_enabled = regulator_is_enabled_regmap,
	321	.enable = max77686_enable,
	322	.disable = regulator_disable_regmap,
	323	.get_voltage_sel = regulator_get_voltage_sel_regmap,
	324	.set_voltage_sel = regulator_set_voltage_sel_regmap,
	325	.set_voltage_time_sel = regulator_set_voltage_time_sel,
78ce6128	326	.set_suspend_disable = max77686_set_suspend_disable,
133d4016 JL	327	};
133d4016 JL	328
404826cb	329	static const struct regulator_ops max77686_buck_dvs_ops = {
133d4016	330	.list_voltage = regulator_list_voltage_linear,
2e3f7f26	331	.map_voltage = regulator_map_voltage_linear,
133d4016	332	.is_enabled = regulator_is_enabled_regmap,
6d2c896b	333	.enable = max77686_enable,
133d4016 JL	334	.disable = regulator_disable_regmap,
	335	.get_voltage_sel = regulator_get_voltage_sel_regmap,
	336	.set_voltage_sel = regulator_set_voltage_sel_regmap,
852abad2	337	.set_voltage_time_sel = regulator_set_voltage_time_sel,
f503071b	338	.set_ramp_delay = max77686_set_ramp_delay,
78ce6128	339	.set_suspend_disable = max77686_set_suspend_disable,
133d4016 JL	340	};
	341
	342	#define regulator_desc_ldo(num) { \
	343	.name = "LDO"#num, \
04803952 KK	344	.of_match = of_match_ptr("LDO"#num), \
04803952 KK	345	.regulators_node = of_match_ptr("voltage-regulators"), \
3307e902	346	.of_parse_cb = max77686_of_parse_cb, \
133d4016 JL	347	.id = MAX77686_LDO##num, \
	348	.ops = &max77686_ops, \
	349	.type = REGULATOR_VOLTAGE, \
	350	.owner = THIS_MODULE, \
	351	.min_uV = MAX77686_LDO_MINUV, \
	352	.uV_step = MAX77686_LDO_UVSTEP, \
852abad2	353	.ramp_delay = MAX77686_RAMP_DELAY, \
133d4016 JL	354	.n_voltages = MAX77686_VSEL_MASK + 1, \
	355	.vsel_reg = MAX77686_REG_LDO1CTRL1 + num - 1, \
	356	.vsel_mask = MAX77686_VSEL_MASK, \
	357	.enable_reg = MAX77686_REG_LDO1CTRL1 + num - 1, \
	358	.enable_mask = MAX77686_OPMODE_MASK \
	359	<< MAX77686_OPMODE_SHIFT, \
	360	}
15282ba9 YSB	361	#define regulator_desc_lpm_ldo(num) { \
15282ba9 YSB	362	.name = "LDO"#num, \
04803952 KK	363	.of_match = of_match_ptr("LDO"#num), \
04803952 KK	364	.regulators_node = of_match_ptr("voltage-regulators"), \
15282ba9 YSB	365	.id = MAX77686_LDO##num, \
	366	.ops = &max77686_ldo_ops, \
	367	.type = REGULATOR_VOLTAGE, \
	368	.owner = THIS_MODULE, \
	369	.min_uV = MAX77686_LDO_MINUV, \
	370	.uV_step = MAX77686_LDO_UVSTEP, \
	371	.ramp_delay = MAX77686_RAMP_DELAY, \
	372	.n_voltages = MAX77686_VSEL_MASK + 1, \
	373	.vsel_reg = MAX77686_REG_LDO1CTRL1 + num - 1, \
	374	.vsel_mask = MAX77686_VSEL_MASK, \
	375	.enable_reg = MAX77686_REG_LDO1CTRL1 + num - 1, \
	376	.enable_mask = MAX77686_OPMODE_MASK \
	377	<< MAX77686_OPMODE_SHIFT, \
	378	}
133d4016	379	#define regulator_desc_ldo_low(num) { \
15282ba9	380	.name = "LDO"#num, \
04803952 KK	381	.of_match = of_match_ptr("LDO"#num), \
04803952 KK	382	.regulators_node = of_match_ptr("voltage-regulators"), \
15282ba9 YSB	383	.id = MAX77686_LDO##num, \
	384	.ops = &max77686_ldo_ops, \
	385	.type = REGULATOR_VOLTAGE, \
	386	.owner = THIS_MODULE, \
	387	.min_uV = MAX77686_LDO_LOW_MINUV, \
	388	.uV_step = MAX77686_LDO_LOW_UVSTEP, \
	389	.ramp_delay = MAX77686_RAMP_DELAY, \
	390	.n_voltages = MAX77686_VSEL_MASK + 1, \
	391	.vsel_reg = MAX77686_REG_LDO1CTRL1 + num - 1, \
	392	.vsel_mask = MAX77686_VSEL_MASK, \
	393	.enable_reg = MAX77686_REG_LDO1CTRL1 + num - 1, \
	394	.enable_mask = MAX77686_OPMODE_MASK \
	395	<< MAX77686_OPMODE_SHIFT, \
	396	}
	397	#define regulator_desc_ldo1_low(num) { \
133d4016	398	.name = "LDO"#num, \
04803952 KK	399	.of_match = of_match_ptr("LDO"#num), \
04803952 KK	400	.regulators_node = of_match_ptr("voltage-regulators"), \
133d4016 JL	401	.id = MAX77686_LDO##num, \
	402	.ops = &max77686_ops, \
	403	.type = REGULATOR_VOLTAGE, \
	404	.owner = THIS_MODULE, \
	405	.min_uV = MAX77686_LDO_LOW_MINUV, \
	406	.uV_step = MAX77686_LDO_LOW_UVSTEP, \
852abad2	407	.ramp_delay = MAX77686_RAMP_DELAY, \
133d4016 JL	408	.n_voltages = MAX77686_VSEL_MASK + 1, \
	409	.vsel_reg = MAX77686_REG_LDO1CTRL1 + num - 1, \
	410	.vsel_mask = MAX77686_VSEL_MASK, \
	411	.enable_reg = MAX77686_REG_LDO1CTRL1 + num - 1, \
	412	.enable_mask = MAX77686_OPMODE_MASK \
	413	<< MAX77686_OPMODE_SHIFT, \
	414	}
	415	#define regulator_desc_buck(num) { \
	416	.name = "BUCK"#num, \
04803952 KK	417	.of_match = of_match_ptr("BUCK"#num), \
04803952 KK	418	.regulators_node = of_match_ptr("voltage-regulators"), \
3307e902	419	.of_parse_cb = max77686_of_parse_cb, \
133d4016 JL	420	.id = MAX77686_BUCK##num, \
	421	.ops = &max77686_ops, \
	422	.type = REGULATOR_VOLTAGE, \
	423	.owner = THIS_MODULE, \
	424	.min_uV = MAX77686_BUCK_MINUV, \
	425	.uV_step = MAX77686_BUCK_UVSTEP, \
852abad2	426	.ramp_delay = MAX77686_RAMP_DELAY, \
a9597305	427	.enable_time = MAX77686_BUCK_ENABLE_TIME, \
133d4016 JL	428	.n_voltages = MAX77686_VSEL_MASK + 1, \
	429	.vsel_reg = MAX77686_REG_BUCK5OUT + (num - 5) * 2, \
	430	.vsel_mask = MAX77686_VSEL_MASK, \
	431	.enable_reg = MAX77686_REG_BUCK5CTRL + (num - 5) * 2, \
	432	.enable_mask = MAX77686_OPMODE_MASK, \
	433	}
	434	#define regulator_desc_buck1(num) { \
	435	.name = "BUCK"#num, \
04803952 KK	436	.of_match = of_match_ptr("BUCK"#num), \
04803952 KK	437	.regulators_node = of_match_ptr("voltage-regulators"), \
133d4016	438	.id = MAX77686_BUCK##num, \
15282ba9	439	.ops = &max77686_buck1_ops, \
133d4016 JL	440	.type = REGULATOR_VOLTAGE, \
	441	.owner = THIS_MODULE, \
	442	.min_uV = MAX77686_BUCK_MINUV, \
	443	.uV_step = MAX77686_BUCK_UVSTEP, \
852abad2	444	.ramp_delay = MAX77686_RAMP_DELAY, \
a9597305	445	.enable_time = MAX77686_BUCK_ENABLE_TIME, \
133d4016 JL	446	.n_voltages = MAX77686_VSEL_MASK + 1, \
	447	.vsel_reg = MAX77686_REG_BUCK1OUT, \
	448	.vsel_mask = MAX77686_VSEL_MASK, \
	449	.enable_reg = MAX77686_REG_BUCK1CTRL, \
	450	.enable_mask = MAX77686_OPMODE_MASK, \
	451	}
	452	#define regulator_desc_buck_dvs(num) { \
	453	.name = "BUCK"#num, \
04803952 KK	454	.of_match = of_match_ptr("BUCK"#num), \
04803952 KK	455	.regulators_node = of_match_ptr("voltage-regulators"), \
133d4016	456	.id = MAX77686_BUCK##num, \
74adfee5	457	.ops = &max77686_buck_dvs_ops, \
133d4016 JL	458	.type = REGULATOR_VOLTAGE, \
	459	.owner = THIS_MODULE, \
	460	.min_uV = MAX77686_DVS_MINUV, \
	461	.uV_step = MAX77686_DVS_UVSTEP, \
852abad2	462	.ramp_delay = MAX77686_DVS_RAMP_DELAY, \
a9597305	463	.enable_time = MAX77686_DVS_ENABLE_TIME, \
133d4016 JL	464	.n_voltages = MAX77686_DVS_VSEL_MASK + 1, \
	465	.vsel_reg = MAX77686_REG_BUCK2DVS1 + (num - 2) * 10, \
	466	.vsel_mask = MAX77686_DVS_VSEL_MASK, \
	467	.enable_reg = MAX77686_REG_BUCK2CTRL1 + (num - 2) * 10, \
	468	.enable_mask = MAX77686_OPMODE_MASK \
	469	<< MAX77686_OPMODE_BUCK234_SHIFT, \
	470	}
	471
73dbdf8f	472	static const struct regulator_desc regulators[] = {
15282ba9	473	regulator_desc_ldo1_low(1),
133d4016 JL	474	regulator_desc_ldo_low(2),
	475	regulator_desc_ldo(3),
	476	regulator_desc_ldo(4),
	477	regulator_desc_ldo(5),
	478	regulator_desc_ldo_low(6),
	479	regulator_desc_ldo_low(7),
	480	regulator_desc_ldo_low(8),
	481	regulator_desc_ldo(9),
15282ba9 YSB	482	regulator_desc_lpm_ldo(10),
	483	regulator_desc_lpm_ldo(11),
	484	regulator_desc_lpm_ldo(12),
133d4016	485	regulator_desc_ldo(13),
15282ba9	486	regulator_desc_lpm_ldo(14),
133d4016	487	regulator_desc_ldo_low(15),
15282ba9	488	regulator_desc_lpm_ldo(16),
133d4016 JL	489	regulator_desc_ldo(17),
	490	regulator_desc_ldo(18),
	491	regulator_desc_ldo(19),
	492	regulator_desc_ldo(20),
	493	regulator_desc_ldo(21),
	494	regulator_desc_ldo(22),
	495	regulator_desc_ldo(23),
	496	regulator_desc_ldo(24),
	497	regulator_desc_ldo(25),
	498	regulator_desc_ldo(26),
	499	regulator_desc_buck1(1),
	500	regulator_desc_buck_dvs(2),
	501	regulator_desc_buck_dvs(3),
	502	regulator_desc_buck_dvs(4),
	503	regulator_desc_buck(5),
	504	regulator_desc_buck(6),
	505	regulator_desc_buck(7),
	506	regulator_desc_buck(8),
	507	regulator_desc_buck(9),
	508	};
	509
a5023574	510	static int max77686_pmic_probe(struct platform_device *pdev)
133d4016 JL	511	{
133d4016 JL	512	struct max77686_dev *iodev = dev_get_drvdata(pdev->dev.parent);
133d4016	513	struct max77686_data *max77686;
04803952	514	int i;
c59d2a6b	515	struct regulator_config config = { };
133d4016 JL	516
	517	dev_dbg(&pdev->dev, "%s\n", __func__);
	518
	519	max77686 = devm_kzalloc(&pdev->dev, sizeof(struct max77686_data),
	520	GFP_KERNEL);
	521	if (!max77686)
	522	return -ENOMEM;
	523
04803952	524	config.dev = iodev->dev;
f503071b	525	config.regmap = iodev->regmap;
6d2c896b	526	config.driver_data = max77686;
133d4016 JL	527	platform_set_drvdata(pdev, max77686);
133d4016 JL	528
ab0d1cbe	529	for (i = 0; i < MAX77686_REGULATORS; i++) {
b0c13e80	530	struct regulator_dev *rdev;
eca29da9	531	int id = regulators[i].id;
b0c13e80	532
4524df83	533	max77686->opmode[id] = MAX77686_NORMAL;
b0c13e80	534	rdev = devm_regulator_register(&pdev->dev,
44815b4a	535	&regulators[i], &config);
b0c13e80	536	if (IS_ERR(rdev)) {
04803952	537	int ret = PTR_ERR(rdev);
f503071b	538	dev_err(&pdev->dev,
04803952 KK	539	"regulator init failed for %d: %d\n", i, ret);
04803952 KK	540	return ret;
133d4016	541	}
133d4016	542	}
ab0d1cbe	543
133d4016 JL	544	return 0;
	545	}
	546
	547	static const struct platform_device_id max77686_pmic_id[] = {
	548	{"max77686-pmic", 0},
	549	{ },
	550	};
	551	MODULE_DEVICE_TABLE(platform, max77686_pmic_id);
	552
	553	static struct platform_driver max77686_pmic_driver = {
	554	.driver = {
	555	.name = "max77686-pmic",
133d4016 JL	556	},
133d4016 JL	557	.probe = max77686_pmic_probe,
133d4016 JL	558	.id_table = max77686_pmic_id,
	559	};
	560
314a8203	561	module_platform_driver(max77686_pmic_driver);
133d4016 JL	562
	563	MODULE_DESCRIPTION("MAXIM 77686 Regulator Driver");
	564	MODULE_AUTHOR("Chiwoong Byun <woong.byun@samsung.com>");
	565	MODULE_LICENSE("GPL");