[mirror_ubuntu-artful-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

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