[GitHub/mt8127/android_kernel_alcatel_ttab.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/delay.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

#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 {
	struct regulator_dev *rdev[MAX77686_REGULATORS];
	unsigned int opmode[MAX77686_REGULATORS];
};

/* Some BUCKS supports Normal[ON/OFF] mode during suspend */
static int max77686_buck_set_suspend_disable(struct regulator_dev *rdev)
{
	unsigned int val;
	struct max77686_data *max77686 = rdev_get_drvdata(rdev);
	int ret, id = rdev_get_id(rdev);

	if (id == MAX77686_BUCK1)
		val = 0x1;
	else
		val = 0x1 << MAX77686_OPMODE_BUCK234_SHIFT;

	ret = regmap_update_bits(rdev->regmap, rdev->desc->enable_reg,
				 rdev->desc->enable_mask, val);
	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 = 0x2 << MAX77686_OPMODE_SHIFT;
		break;
	case REGULATOR_MODE_NORMAL:			/* ON in Normal Mode */
		val = 0x3 << MAX77686_OPMODE_SHIFT;
		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);
	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 = 0x1 << MAX77686_OPMODE_SHIFT;
		break;
	case REGULATOR_MODE_IDLE:			/* ON in LP Mode */
		val = 0x2 << MAX77686_OPMODE_SHIFT;
		break;
	case REGULATOR_MODE_NORMAL:			/* ON in Normal Mode */
		val = 0x3 << MAX77686_OPMODE_SHIFT;
		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);
	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);

	return regmap_update_bits(rdev->regmap, rdev->desc->enable_reg,
				  rdev->desc->enable_mask,
				  max77686->opmode[rdev_get_id(rdev)]);
}

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 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_find_node_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) {
		dev_err(&pdev->dev,
			"could not allocate memory for regulator data\n");
		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;

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

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

	return 0;
err:
	while (--i >= 0)
		regulator_unregister(max77686->rdev[i]);
	return ret;
}

static int max77686_pmic_remove(struct platform_device *pdev)
{
	struct max77686_data *max77686 = platform_get_drvdata(pdev);
	int i;

	for (i = 0; i < MAX77686_REGULATORS; i++)
		regulator_unregister(max77686->rdev[i]);

	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,
	.remove = max77686_pmic_remove,
	.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>
	27	#include <linux/delay.h>
	28	#include <linux/err.h>
	29	#include <linux/gpio.h>
	30	#include <linux/slab.h>
	31	#include <linux/platform_device.h>
	32	#include <linux/regulator/driver.h>
	33	#include <linux/regulator/machine.h>
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
	49	#define MAX77686_OPMODE_SHIFT 6
	50	#define MAX77686_OPMODE_BUCK234_SHIFT 4
	51	#define MAX77686_OPMODE_MASK 0x3
	52
	53	#define MAX77686_VSEL_MASK 0x3F
	54	#define MAX77686_DVS_VSEL_MASK 0xFF
	55
	56	#define MAX77686_RAMP_RATE_MASK 0xC0
	57
	58	#define MAX77686_REGULATORS MAX77686_REG_MAX
	59	#define MAX77686_LDOS 26
	60
	61	enum max77686_ramp_rate {
	62	RAMP_RATE_13P75MV,
	63	RAMP_RATE_27P5MV,
	64	RAMP_RATE_55MV,
	65	RAMP_RATE_NO_CTRL, /* 100mV/us */
	66	};
	67
	68	struct max77686_data {
cb44cdea	69	struct regulator_dev *rdev[MAX77686_REGULATORS];
6d2c896b	70	unsigned int opmode[MAX77686_REGULATORS];
133d4016 JL	71	};
133d4016 JL	72
15282ba9 YSB	73	/* Some BUCKS supports Normal[ON/OFF] mode during suspend */
	74	static int max77686_buck_set_suspend_disable(struct regulator_dev *rdev)
	75	{
	76	unsigned int val;
	77	struct max77686_data *max77686 = rdev_get_drvdata(rdev);
3ecf198e	78	int ret, id = rdev_get_id(rdev);
15282ba9	79
40e72149	80	if (id == MAX77686_BUCK1)
15282ba9 YSB	81	val = 0x1;
	82	else
	83	val = 0x1 << MAX77686_OPMODE_BUCK234_SHIFT;
	84
3ecf198e AL	85	ret = regmap_update_bits(rdev->regmap, rdev->desc->enable_reg,
	86	rdev->desc->enable_mask, val);
	87	if (ret)
	88	return ret;
	89
40e72149	90	max77686->opmode[id] = val;
3ecf198e	91	return 0;
15282ba9 YSB	92	}
	93
	94	/* Some LDOs supports [LPM/Normal]ON mode during suspend state */
	95	static int max77686_set_suspend_mode(struct regulator_dev *rdev,
	96	unsigned int mode)
	97	{
	98	struct max77686_data *max77686 = rdev_get_drvdata(rdev);
	99	unsigned int val;
3ecf198e	100	int ret, id = rdev_get_id(rdev);
15282ba9 YSB	101
15282ba9 YSB	102	/* BUCK[5-9] doesn't support this feature */
40e72149	103	if (id >= MAX77686_BUCK5)
15282ba9 YSB	104	return 0;
	105
	106	switch (mode) {
	107	case REGULATOR_MODE_IDLE: /* ON in LP Mode */
	108	val = 0x2 << MAX77686_OPMODE_SHIFT;
	109	break;
	110	case REGULATOR_MODE_NORMAL: /* ON in Normal Mode */
	111	val = 0x3 << MAX77686_OPMODE_SHIFT;
	112	break;
	113	default:
	114	pr_warn("%s: regulator_suspend_mode : 0x%x not supported\n",
	115	rdev->desc->name, mode);
	116	return -EINVAL;
	117	}
	118
3ecf198e AL	119	ret = regmap_update_bits(rdev->regmap, rdev->desc->enable_reg,
	120	rdev->desc->enable_mask, val);
	121	if (ret)
	122	return ret;
	123
40e72149	124	max77686->opmode[id] = val;
3ecf198e	125	return 0;
15282ba9 YSB	126	}
	127
	128	/* Some LDOs supports LPM-ON/OFF/Normal-ON mode during suspend state */
	129	static int max77686_ldo_set_suspend_mode(struct regulator_dev *rdev,
	130	unsigned int mode)
	131	{
	132	unsigned int val;
	133	struct max77686_data *max77686 = rdev_get_drvdata(rdev);
3ecf198e	134	int ret;
15282ba9 YSB	135
	136	switch (mode) {
	137	case REGULATOR_MODE_STANDBY: /* switch off */
	138	val = 0x1 << MAX77686_OPMODE_SHIFT;
	139	break;
	140	case REGULATOR_MODE_IDLE: /* ON in LP Mode */
	141	val = 0x2 << MAX77686_OPMODE_SHIFT;
	142	break;
	143	case REGULATOR_MODE_NORMAL: /* ON in Normal Mode */
	144	val = 0x3 << MAX77686_OPMODE_SHIFT;
	145	break;
	146	default:
	147	pr_warn("%s: regulator_suspend_mode : 0x%x not supported\n",
	148	rdev->desc->name, mode);
	149	return -EINVAL;
	150	}
	151
3ecf198e AL	152	ret = regmap_update_bits(rdev->regmap, rdev->desc->enable_reg,
	153	rdev->desc->enable_mask, val);
	154	if (ret)
	155	return ret;
	156
40e72149	157	max77686->opmode[rdev_get_id(rdev)] = val;
3ecf198e	158	return 0;
15282ba9 YSB	159	}
15282ba9 YSB	160
38d34035	161	static int max77686_enable(struct regulator_dev *rdev)
6d2c896b YSB	162	{
	163	struct max77686_data *max77686 = rdev_get_drvdata(rdev);
	164
	165	return regmap_update_bits(rdev->regmap, rdev->desc->enable_reg,
	166	rdev->desc->enable_mask,
40e72149	167	max77686->opmode[rdev_get_id(rdev)]);
6d2c896b YSB	168	}
6d2c896b YSB	169
f503071b YSB	170	static int max77686_set_ramp_delay(struct regulator_dev *rdev, int ramp_delay)
	171	{
	172	unsigned int ramp_value = RAMP_RATE_NO_CTRL;
	173
	174	switch (ramp_delay) {
	175	case 1 ... 13750:
	176	ramp_value = RAMP_RATE_13P75MV;
	177	break;
	178	case 13751 ... 27500:
	179	ramp_value = RAMP_RATE_27P5MV;
	180	break;
	181	case 27501 ... 55000:
	182	ramp_value = RAMP_RATE_55MV;
	183	break;
	184	case 55001 ... 100000:
	185	break;
	186	default:
	187	pr_warn("%s: ramp_delay: %d not supported, setting 100000\n",
	188	rdev->desc->name, ramp_delay);
	189	}
	190
	191	return regmap_update_bits(rdev->regmap, rdev->desc->enable_reg,
	192	MAX77686_RAMP_RATE_MASK, ramp_value << 6);
	193	}
	194
133d4016 JL	195	static struct regulator_ops max77686_ops = {
133d4016 JL	196	.list_voltage = regulator_list_voltage_linear,
2e3f7f26	197	.map_voltage = regulator_map_voltage_linear,
133d4016	198	.is_enabled = regulator_is_enabled_regmap,
6d2c896b	199	.enable = max77686_enable,
133d4016 JL	200	.disable = regulator_disable_regmap,
	201	.get_voltage_sel = regulator_get_voltage_sel_regmap,
	202	.set_voltage_sel = regulator_set_voltage_sel_regmap,
852abad2	203	.set_voltage_time_sel = regulator_set_voltage_time_sel,
15282ba9 YSB	204	.set_suspend_mode = max77686_set_suspend_mode,
	205	};
	206
	207	static struct regulator_ops max77686_ldo_ops = {
	208	.list_voltage = regulator_list_voltage_linear,
	209	.map_voltage = regulator_map_voltage_linear,
	210	.is_enabled = regulator_is_enabled_regmap,
	211	.enable = max77686_enable,
133d4016 JL	212	.disable = regulator_disable_regmap,
	213	.get_voltage_sel = regulator_get_voltage_sel_regmap,
	214	.set_voltage_sel = regulator_set_voltage_sel_regmap,
852abad2	215	.set_voltage_time_sel = regulator_set_voltage_time_sel,
15282ba9 YSB	216	.set_suspend_mode = max77686_ldo_set_suspend_mode,
	217	};
	218
	219	static struct regulator_ops max77686_buck1_ops = {
	220	.list_voltage = regulator_list_voltage_linear,
	221	.map_voltage = regulator_map_voltage_linear,
	222	.is_enabled = regulator_is_enabled_regmap,
	223	.enable = max77686_enable,
	224	.disable = regulator_disable_regmap,
	225	.get_voltage_sel = regulator_get_voltage_sel_regmap,
	226	.set_voltage_sel = regulator_set_voltage_sel_regmap,
	227	.set_voltage_time_sel = regulator_set_voltage_time_sel,
	228	.set_suspend_disable = max77686_buck_set_suspend_disable,
133d4016 JL	229	};
	230
	231	static struct regulator_ops max77686_buck_dvs_ops = {
	232	.list_voltage = regulator_list_voltage_linear,
2e3f7f26	233	.map_voltage = regulator_map_voltage_linear,
133d4016	234	.is_enabled = regulator_is_enabled_regmap,
6d2c896b	235	.enable = max77686_enable,
133d4016 JL	236	.disable = regulator_disable_regmap,
	237	.get_voltage_sel = regulator_get_voltage_sel_regmap,
	238	.set_voltage_sel = regulator_set_voltage_sel_regmap,
852abad2	239	.set_voltage_time_sel = regulator_set_voltage_time_sel,
f503071b	240	.set_ramp_delay = max77686_set_ramp_delay,
15282ba9	241	.set_suspend_disable = max77686_buck_set_suspend_disable,
133d4016 JL	242	};
	243
	244	#define regulator_desc_ldo(num) { \
	245	.name = "LDO"#num, \
	246	.id = MAX77686_LDO##num, \
	247	.ops = &max77686_ops, \
	248	.type = REGULATOR_VOLTAGE, \
	249	.owner = THIS_MODULE, \
	250	.min_uV = MAX77686_LDO_MINUV, \
	251	.uV_step = MAX77686_LDO_UVSTEP, \
852abad2	252	.ramp_delay = MAX77686_RAMP_DELAY, \
133d4016 JL	253	.n_voltages = MAX77686_VSEL_MASK + 1, \
	254	.vsel_reg = MAX77686_REG_LDO1CTRL1 + num - 1, \
	255	.vsel_mask = MAX77686_VSEL_MASK, \
	256	.enable_reg = MAX77686_REG_LDO1CTRL1 + num - 1, \
	257	.enable_mask = MAX77686_OPMODE_MASK \
	258	<< MAX77686_OPMODE_SHIFT, \
	259	}
15282ba9 YSB	260	#define regulator_desc_lpm_ldo(num) { \
	261	.name = "LDO"#num, \
	262	.id = MAX77686_LDO##num, \
	263	.ops = &max77686_ldo_ops, \
	264	.type = REGULATOR_VOLTAGE, \
	265	.owner = THIS_MODULE, \
	266	.min_uV = MAX77686_LDO_MINUV, \
	267	.uV_step = MAX77686_LDO_UVSTEP, \
	268	.ramp_delay = MAX77686_RAMP_DELAY, \
	269	.n_voltages = MAX77686_VSEL_MASK + 1, \
	270	.vsel_reg = MAX77686_REG_LDO1CTRL1 + num - 1, \
	271	.vsel_mask = MAX77686_VSEL_MASK, \
	272	.enable_reg = MAX77686_REG_LDO1CTRL1 + num - 1, \
	273	.enable_mask = MAX77686_OPMODE_MASK \
	274	<< MAX77686_OPMODE_SHIFT, \
	275	}
133d4016	276	#define regulator_desc_ldo_low(num) { \
15282ba9 YSB	277	.name = "LDO"#num, \
	278	.id = MAX77686_LDO##num, \
	279	.ops = &max77686_ldo_ops, \
	280	.type = REGULATOR_VOLTAGE, \
	281	.owner = THIS_MODULE, \
	282	.min_uV = MAX77686_LDO_LOW_MINUV, \
	283	.uV_step = MAX77686_LDO_LOW_UVSTEP, \
	284	.ramp_delay = MAX77686_RAMP_DELAY, \
	285	.n_voltages = MAX77686_VSEL_MASK + 1, \
	286	.vsel_reg = MAX77686_REG_LDO1CTRL1 + num - 1, \
	287	.vsel_mask = MAX77686_VSEL_MASK, \
	288	.enable_reg = MAX77686_REG_LDO1CTRL1 + num - 1, \
	289	.enable_mask = MAX77686_OPMODE_MASK \
	290	<< MAX77686_OPMODE_SHIFT, \
	291	}
	292	#define regulator_desc_ldo1_low(num) { \
133d4016 JL	293	.name = "LDO"#num, \
	294	.id = MAX77686_LDO##num, \
	295	.ops = &max77686_ops, \
	296	.type = REGULATOR_VOLTAGE, \
	297	.owner = THIS_MODULE, \
	298	.min_uV = MAX77686_LDO_LOW_MINUV, \
	299	.uV_step = MAX77686_LDO_LOW_UVSTEP, \
852abad2	300	.ramp_delay = MAX77686_RAMP_DELAY, \
133d4016 JL	301	.n_voltages = MAX77686_VSEL_MASK + 1, \
	302	.vsel_reg = MAX77686_REG_LDO1CTRL1 + num - 1, \
	303	.vsel_mask = MAX77686_VSEL_MASK, \
	304	.enable_reg = MAX77686_REG_LDO1CTRL1 + num - 1, \
	305	.enable_mask = MAX77686_OPMODE_MASK \
	306	<< MAX77686_OPMODE_SHIFT, \
	307	}
	308	#define regulator_desc_buck(num) { \
	309	.name = "BUCK"#num, \
	310	.id = MAX77686_BUCK##num, \
	311	.ops = &max77686_ops, \
	312	.type = REGULATOR_VOLTAGE, \
	313	.owner = THIS_MODULE, \
	314	.min_uV = MAX77686_BUCK_MINUV, \
	315	.uV_step = MAX77686_BUCK_UVSTEP, \
852abad2	316	.ramp_delay = MAX77686_RAMP_DELAY, \
133d4016 JL	317	.n_voltages = MAX77686_VSEL_MASK + 1, \
	318	.vsel_reg = MAX77686_REG_BUCK5OUT + (num - 5) * 2, \
	319	.vsel_mask = MAX77686_VSEL_MASK, \
	320	.enable_reg = MAX77686_REG_BUCK5CTRL + (num - 5) * 2, \
	321	.enable_mask = MAX77686_OPMODE_MASK, \
	322	}
	323	#define regulator_desc_buck1(num) { \
	324	.name = "BUCK"#num, \
	325	.id = MAX77686_BUCK##num, \
15282ba9	326	.ops = &max77686_buck1_ops, \
133d4016 JL	327	.type = REGULATOR_VOLTAGE, \
	328	.owner = THIS_MODULE, \
	329	.min_uV = MAX77686_BUCK_MINUV, \
	330	.uV_step = MAX77686_BUCK_UVSTEP, \
852abad2	331	.ramp_delay = MAX77686_RAMP_DELAY, \
133d4016 JL	332	.n_voltages = MAX77686_VSEL_MASK + 1, \
	333	.vsel_reg = MAX77686_REG_BUCK1OUT, \
	334	.vsel_mask = MAX77686_VSEL_MASK, \
	335	.enable_reg = MAX77686_REG_BUCK1CTRL, \
	336	.enable_mask = MAX77686_OPMODE_MASK, \
	337	}
	338	#define regulator_desc_buck_dvs(num) { \
	339	.name = "BUCK"#num, \
	340	.id = MAX77686_BUCK##num, \
74adfee5	341	.ops = &max77686_buck_dvs_ops, \
133d4016 JL	342	.type = REGULATOR_VOLTAGE, \
	343	.owner = THIS_MODULE, \
	344	.min_uV = MAX77686_DVS_MINUV, \
	345	.uV_step = MAX77686_DVS_UVSTEP, \
852abad2	346	.ramp_delay = MAX77686_DVS_RAMP_DELAY, \
133d4016 JL	347	.n_voltages = MAX77686_DVS_VSEL_MASK + 1, \
	348	.vsel_reg = MAX77686_REG_BUCK2DVS1 + (num - 2) * 10, \
	349	.vsel_mask = MAX77686_DVS_VSEL_MASK, \
	350	.enable_reg = MAX77686_REG_BUCK2CTRL1 + (num - 2) * 10, \
	351	.enable_mask = MAX77686_OPMODE_MASK \
	352	<< MAX77686_OPMODE_BUCK234_SHIFT, \
	353	}
	354
	355	static struct regulator_desc regulators[] = {
15282ba9	356	regulator_desc_ldo1_low(1),
133d4016 JL	357	regulator_desc_ldo_low(2),
	358	regulator_desc_ldo(3),
	359	regulator_desc_ldo(4),
	360	regulator_desc_ldo(5),
	361	regulator_desc_ldo_low(6),
	362	regulator_desc_ldo_low(7),
	363	regulator_desc_ldo_low(8),
	364	regulator_desc_ldo(9),
15282ba9 YSB	365	regulator_desc_lpm_ldo(10),
	366	regulator_desc_lpm_ldo(11),
	367	regulator_desc_lpm_ldo(12),
133d4016	368	regulator_desc_ldo(13),
15282ba9	369	regulator_desc_lpm_ldo(14),
133d4016	370	regulator_desc_ldo_low(15),
15282ba9	371	regulator_desc_lpm_ldo(16),
133d4016 JL	372	regulator_desc_ldo(17),
	373	regulator_desc_ldo(18),
	374	regulator_desc_ldo(19),
	375	regulator_desc_ldo(20),
	376	regulator_desc_ldo(21),
	377	regulator_desc_ldo(22),
	378	regulator_desc_ldo(23),
	379	regulator_desc_ldo(24),
	380	regulator_desc_ldo(25),
	381	regulator_desc_ldo(26),
	382	regulator_desc_buck1(1),
	383	regulator_desc_buck_dvs(2),
	384	regulator_desc_buck_dvs(3),
	385	regulator_desc_buck_dvs(4),
	386	regulator_desc_buck(5),
	387	regulator_desc_buck(6),
	388	regulator_desc_buck(7),
	389	regulator_desc_buck(8),
	390	regulator_desc_buck(9),
	391	};
	392
4706fcab	393	#ifdef CONFIG_OF
b19f5758	394	static int max77686_pmic_dt_parse_pdata(struct platform_device *pdev,
4706fcab YSB	395	struct max77686_platform_data *pdata)
4706fcab YSB	396	{
b19f5758	397	struct max77686_dev *iodev = dev_get_drvdata(pdev->dev.parent);
4706fcab YSB	398	struct device_node pmic_np, regulators_np;
	399	struct max77686_regulator_data *rdata;
	400	struct of_regulator_match rmatch;
	401	unsigned int i;
	402
	403	pmic_np = iodev->dev->of_node;
	404	regulators_np = of_find_node_by_name(pmic_np, "voltage-regulators");
	405	if (!regulators_np) {
b19f5758	406	dev_err(&pdev->dev, "could not find regulators sub-node\n");
4706fcab YSB	407	return -EINVAL;
	408	}
	409
	410	pdata->num_regulators = ARRAY_SIZE(regulators);
b19f5758	411	rdata = devm_kzalloc(&pdev->dev, sizeof(rdata)
4706fcab YSB	412	pdata->num_regulators, GFP_KERNEL);
4706fcab YSB	413	if (!rdata) {
b19f5758	414	dev_err(&pdev->dev,
4706fcab YSB	415	"could not allocate memory for regulator data\n");
	416	return -ENOMEM;
	417	}
	418
	419	for (i = 0; i < pdata->num_regulators; i++) {
	420	rmatch.name = regulators[i].name;
	421	rmatch.init_data = NULL;
d1ef065d	422	rmatch.of_node = NULL;
b19f5758	423	of_regulator_match(&pdev->dev, regulators_np, &rmatch, 1);
4706fcab	424	rdata[i].initdata = rmatch.init_data;
2c58e266	425	rdata[i].of_node = rmatch.of_node;
4706fcab YSB	426	}
	427
	428	pdata->regulators = rdata;
	429
	430	return 0;
	431	}
	432	#else
b19f5758	433	static int max77686_pmic_dt_parse_pdata(struct platform_device *pdev,
4706fcab YSB	434	struct max77686_platform_data *pdata)
	435	{
	436	return 0;
	437	}
	438	#endif /* CONFIG_OF */
	439
a5023574	440	static int max77686_pmic_probe(struct platform_device *pdev)
133d4016 JL	441	{
	442	struct max77686_dev *iodev = dev_get_drvdata(pdev->dev.parent);
	443	struct max77686_platform_data *pdata = dev_get_platdata(iodev->dev);
133d4016	444	struct max77686_data *max77686;
cb44cdea	445	int i, ret = 0;
c59d2a6b	446	struct regulator_config config = { };
133d4016 JL	447
	448	dev_dbg(&pdev->dev, "%s\n", __func__);
	449
4706fcab YSB	450	if (!pdata) {
	451	dev_err(&pdev->dev, "no platform data found for regulator\n");
	452	return -ENODEV;
	453	}
	454
	455	if (iodev->dev->of_node) {
b19f5758	456	ret = max77686_pmic_dt_parse_pdata(pdev, pdata);
4706fcab YSB	457	if (ret)
	458	return ret;
	459	}
	460
	461	if (pdata->num_regulators != MAX77686_REGULATORS) {
ab0d1cbe AL	462	dev_err(&pdev->dev,
	463	"Invalid initial data for regulator's initialiation\n");
	464	return -EINVAL;
	465	}
	466
133d4016 JL	467	max77686 = devm_kzalloc(&pdev->dev, sizeof(struct max77686_data),
	468	GFP_KERNEL);
	469	if (!max77686)
	470	return -ENOMEM;
	471
f503071b YSB	472	config.dev = &pdev->dev;
f503071b YSB	473	config.regmap = iodev->regmap;
6d2c896b	474	config.driver_data = max77686;
133d4016 JL	475	platform_set_drvdata(pdev, max77686);
133d4016 JL	476
ab0d1cbe	477	for (i = 0; i < MAX77686_REGULATORS; i++) {
ab0d1cbe	478	config.init_data = pdata->regulators[i].initdata;
2c58e266	479	config.of_node = pdata->regulators[i].of_node;
133d4016	480
6d2c896b	481	max77686->opmode[i] = regulators[i].enable_mask;
cb44cdea AL	482	max77686->rdev[i] = regulator_register(&regulators[i], &config);
	483	if (IS_ERR(max77686->rdev[i])) {
	484	ret = PTR_ERR(max77686->rdev[i]);
f503071b	485	dev_err(&pdev->dev,
133d4016	486	"regulator init failed for %d\n", i);
cb44cdea AL	487	max77686->rdev[i] = NULL;
cb44cdea AL	488	goto err;
133d4016	489	}
133d4016	490	}
ab0d1cbe	491
133d4016 JL	492	return 0;
133d4016 JL	493	err:
ab0d1cbe	494	while (--i >= 0)
cb44cdea	495	regulator_unregister(max77686->rdev[i]);
133d4016 JL	496	return ret;
	497	}
	498
8dc995f5	499	static int max77686_pmic_remove(struct platform_device *pdev)
133d4016 JL	500	{
133d4016 JL	501	struct max77686_data *max77686 = platform_get_drvdata(pdev);
133d4016 JL	502	int i;
	503
	504	for (i = 0; i < MAX77686_REGULATORS; i++)
cb44cdea	505	regulator_unregister(max77686->rdev[i]);
133d4016 JL	506
	507	return 0;
	508	}
	509
	510	static const struct platform_device_id max77686_pmic_id[] = {
	511	{"max77686-pmic", 0},
	512	{ },
	513	};
	514	MODULE_DEVICE_TABLE(platform, max77686_pmic_id);
	515
	516	static struct platform_driver max77686_pmic_driver = {
	517	.driver = {
	518	.name = "max77686-pmic",
	519	.owner = THIS_MODULE,
	520	},
	521	.probe = max77686_pmic_probe,
5eb9f2b9	522	.remove = max77686_pmic_remove,
133d4016 JL	523	.id_table = max77686_pmic_id,
	524	};
	525
	526	static int __init max77686_pmic_init(void)
	527	{
	528	return platform_driver_register(&max77686_pmic_driver);
	529	}
	530	subsys_initcall(max77686_pmic_init);
	531
	532	static void __exit max77686_pmic_cleanup(void)
	533	{
	534	platform_driver_unregister(&max77686_pmic_driver);
	535	}
	536	module_exit(max77686_pmic_cleanup);
	537
	538	MODULE_DESCRIPTION("MAXIM 77686 Regulator Driver");
	539	MODULE_AUTHOR("Chiwoong Byun <woong.byun@samsung.com>");
	540	MODULE_LICENSE("GPL");