[deliverable/linux.git] / drivers / regulator / max77686.c

/*
 * max77686.c - Regulator driver for the Maxim 77686
 *
 * Copyright (C) 2012 Samsung Electronics
 * Chiwoong Byun <woong.byun@smasung.com>
 * Jonghwa Lee <jonghwa3.lee@samsung.com>
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 2 of the License, or
 * (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
 *
 * This driver is based on max8997.c
 */

#include <linux/kernel.h>
#include <linux/bug.h>
#include <linux/err.h>
#include <linux/gpio.h>
#include <linux/slab.h>
#include <linux/platform_device.h>
#include <linux/regulator/driver.h>
#include <linux/regulator/machine.h>
#include <linux/regulator/of_regulator.h>
#include <linux/mfd/max77686.h>
#include <linux/mfd/max77686-private.h>

#define MAX77686_LDO_MINUV	800000
#define MAX77686_LDO_UVSTEP	50000
#define MAX77686_LDO_LOW_MINUV	800000
#define MAX77686_LDO_LOW_UVSTEP	25000
#define MAX77686_BUCK_MINUV	750000
#define MAX77686_BUCK_UVSTEP	50000
#define MAX77686_RAMP_DELAY	100000			/* uV/us */
#define MAX77686_DVS_RAMP_DELAY	27500			/* uV/us */
#define MAX77686_DVS_MINUV	600000
#define MAX77686_DVS_UVSTEP	12500

/*
 * Values used for configuring LDOs and bucks.
 * Forcing low power mode: LDO1, 3-5, 9, 13, 17-26
 */
#define MAX77686_LDO_LOWPOWER		0x1
/*
 * On/off controlled by PWRREQ:
 *  - LDO2, 6-8, 10-12, 14-16
 *  - buck[1234]
 */
#define MAX77686_OFF_PWRREQ		0x1
/* Low power mode controlled by PWRREQ: All LDOs */
#define MAX77686_LDO_LOWPOWER_PWRREQ	0x2
/* Forcing low power mode: buck[234] */
#define MAX77686_BUCK_LOWPOWER		0x2
#define MAX77686_NORMAL			0x3

#define MAX77686_OPMODE_SHIFT	6
#define MAX77686_OPMODE_BUCK234_SHIFT	4
#define MAX77686_OPMODE_MASK	0x3

#define MAX77686_VSEL_MASK	0x3F
#define MAX77686_DVS_VSEL_MASK	0xFF

#define MAX77686_RAMP_RATE_MASK	0xC0

#define MAX77686_REGULATORS	MAX77686_REG_MAX
#define MAX77686_LDOS		26

enum max77686_ramp_rate {
	RAMP_RATE_13P75MV,
	RAMP_RATE_27P5MV,
	RAMP_RATE_55MV,
	RAMP_RATE_NO_CTRL,	/* 100mV/us */
};

struct max77686_data {
	/* 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;
	}
}

/* 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_NORMAL;
		break;
	default:
		pr_warn("%s: regulator_suspend_mode : 0x%x not supported\n",
			rdev->desc->name, mode);
		return -EINVAL;
	}

	ret = regmap_update_bits(rdev->regmap, rdev->desc->enable_reg,
				  rdev->desc->enable_mask,
				  val << MAX77686_OPMODE_SHIFT);
	if (ret)
		return ret;

	max77686->opmode[id] = val;
	return 0;
}

/* Some LDOs supports LPM-ON/OFF/Normal-ON mode during suspend state */
static int max77686_ldo_set_suspend_mode(struct regulator_dev *rdev,
				     unsigned int mode)
{
	unsigned int val;
	struct max77686_data *max77686 = rdev_get_drvdata(rdev);
	int ret;

	switch (mode) {
	case REGULATOR_MODE_STANDBY:			/* switch off */
		val = MAX77686_OFF_PWRREQ;
		break;
	case REGULATOR_MODE_IDLE:			/* ON in LP Mode */
		val = MAX77686_LDO_LOWPOWER_PWRREQ;
		break;
	case REGULATOR_MODE_NORMAL:			/* ON in Normal Mode */
		val = MAX77686_NORMAL;
		break;
	default:
		pr_warn("%s: regulator_suspend_mode : 0x%x not supported\n",
			rdev->desc->name, mode);
		return -EINVAL;
	}

	ret = regmap_update_bits(rdev->regmap, rdev->desc->enable_reg,
				 rdev->desc->enable_mask,
				 val << MAX77686_OPMODE_SHIFT);
	if (ret)
		return ret;

	max77686->opmode[rdev_get_id(rdev)] = val;
	return 0;
}

static int max77686_enable(struct regulator_dev *rdev)
{
	struct max77686_data *max77686 = rdev_get_drvdata(rdev);
	unsigned int shift;
	int id = rdev_get_id(rdev);

	shift = max77686_get_opmode_shift(id);

	if (max77686->opmode[id] == MAX77686_OFF_PWRREQ)
		max77686->opmode[id] = MAX77686_NORMAL;

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

static int max77686_set_ramp_delay(struct regulator_dev *rdev, int ramp_delay)
{
	unsigned int ramp_value = RAMP_RATE_NO_CTRL;

	switch (ramp_delay) {
	case 1 ... 13750:
		ramp_value = RAMP_RATE_13P75MV;
		break;
	case 13751 ... 27500:
		ramp_value = RAMP_RATE_27P5MV;
		break;
	case 27501 ... 55000:
		ramp_value = RAMP_RATE_55MV;
		break;
	case 55001 ... 100000:
		break;
	default:
		pr_warn("%s: ramp_delay: %d not supported, setting 100000\n",
			rdev->desc->name, ramp_delay);
	}

	return regmap_update_bits(rdev->regmap, rdev->desc->enable_reg,
				  MAX77686_RAMP_RATE_MASK, ramp_value << 6);
}

static struct regulator_ops max77686_ops = {
	.list_voltage		= regulator_list_voltage_linear,
	.map_voltage		= regulator_map_voltage_linear,
	.is_enabled		= regulator_is_enabled_regmap,
	.enable			= max77686_enable,
	.disable		= regulator_disable_regmap,
	.get_voltage_sel	= regulator_get_voltage_sel_regmap,
	.set_voltage_sel	= regulator_set_voltage_sel_regmap,
	.set_voltage_time_sel	= regulator_set_voltage_time_sel,
	.set_suspend_mode	= max77686_set_suspend_mode,
};

static struct regulator_ops max77686_ldo_ops = {
	.list_voltage		= regulator_list_voltage_linear,
	.map_voltage		= regulator_map_voltage_linear,
	.is_enabled		= regulator_is_enabled_regmap,
	.enable			= max77686_enable,
	.disable		= regulator_disable_regmap,
	.get_voltage_sel	= regulator_get_voltage_sel_regmap,
	.set_voltage_sel	= regulator_set_voltage_sel_regmap,
	.set_voltage_time_sel	= regulator_set_voltage_time_sel,
	.set_suspend_mode	= max77686_ldo_set_suspend_mode,
	.set_suspend_disable	= max77686_set_suspend_disable,
};

static struct regulator_ops max77686_buck1_ops = {
	.list_voltage		= regulator_list_voltage_linear,
	.map_voltage		= regulator_map_voltage_linear,
	.is_enabled		= regulator_is_enabled_regmap,
	.enable			= max77686_enable,
	.disable		= regulator_disable_regmap,
	.get_voltage_sel	= regulator_get_voltage_sel_regmap,
	.set_voltage_sel	= regulator_set_voltage_sel_regmap,
	.set_voltage_time_sel	= regulator_set_voltage_time_sel,
	.set_suspend_disable	= max77686_set_suspend_disable,
};

static struct regulator_ops max77686_buck_dvs_ops = {
	.list_voltage		= regulator_list_voltage_linear,
	.map_voltage		= regulator_map_voltage_linear,
	.is_enabled		= regulator_is_enabled_regmap,
	.enable			= max77686_enable,
	.disable		= regulator_disable_regmap,
	.get_voltage_sel	= regulator_get_voltage_sel_regmap,
	.set_voltage_sel	= regulator_set_voltage_sel_regmap,
	.set_voltage_time_sel	= regulator_set_voltage_time_sel,
	.set_ramp_delay		= max77686_set_ramp_delay,
	.set_suspend_disable	= max77686_set_suspend_disable,
};

#define regulator_desc_ldo(num)		{				\
	.name		= "LDO"#num,					\
	.of_match	= of_match_ptr("LDO"#num),			\
	.regulators_node	= of_match_ptr("voltage-regulators"),	\
	.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"),	\
	.id		= MAX77686_BUCK##num,				\
	.ops		= &max77686_ops,				\
	.type		= REGULATOR_VOLTAGE,				\
	.owner		= THIS_MODULE,					\
	.min_uV		= MAX77686_BUCK_MINUV,				\
	.uV_step	= MAX77686_BUCK_UVSTEP,				\
	.ramp_delay	= MAX77686_RAMP_DELAY,				\
	.n_voltages	= MAX77686_VSEL_MASK + 1,			\
	.vsel_reg	= MAX77686_REG_BUCK5OUT + (num - 5) * 2,	\
	.vsel_mask	= MAX77686_VSEL_MASK,				\
	.enable_reg	= MAX77686_REG_BUCK5CTRL + (num - 5) * 2,	\
	.enable_mask	= MAX77686_OPMODE_MASK,				\
}
#define regulator_desc_buck1(num)		{			\
	.name		= "BUCK"#num,					\
	.of_match	= of_match_ptr("BUCK"#num),			\
	.regulators_node	= of_match_ptr("voltage-regulators"),	\
	.id		= MAX77686_BUCK##num,				\
	.ops		= &max77686_buck1_ops,				\
	.type		= REGULATOR_VOLTAGE,				\
	.owner		= THIS_MODULE,					\
	.min_uV		= MAX77686_BUCK_MINUV,				\
	.uV_step	= MAX77686_BUCK_UVSTEP,				\
	.ramp_delay	= MAX77686_RAMP_DELAY,				\
	.n_voltages	= MAX77686_VSEL_MASK + 1,			\
	.vsel_reg	= MAX77686_REG_BUCK1OUT,			\
	.vsel_mask	= MAX77686_VSEL_MASK,				\
	.enable_reg	= MAX77686_REG_BUCK1CTRL,			\
	.enable_mask	= MAX77686_OPMODE_MASK,				\
}
#define regulator_desc_buck_dvs(num)		{			\
	.name		= "BUCK"#num,					\
	.of_match	= of_match_ptr("BUCK"#num),			\
	.regulators_node	= of_match_ptr("voltage-regulators"),	\
	.id		= MAX77686_BUCK##num,				\
	.ops		= &max77686_buck_dvs_ops,			\
	.type		= REGULATOR_VOLTAGE,				\
	.owner		= THIS_MODULE,					\
	.min_uV		= MAX77686_DVS_MINUV,				\
	.uV_step	= MAX77686_DVS_UVSTEP,				\
	.ramp_delay	= MAX77686_DVS_RAMP_DELAY,			\
	.n_voltages	= MAX77686_DVS_VSEL_MASK + 1,			\
	.vsel_reg	= MAX77686_REG_BUCK2DVS1 + (num - 2) * 10,	\
	.vsel_mask	= MAX77686_DVS_VSEL_MASK,			\
	.enable_reg	= MAX77686_REG_BUCK2CTRL1 + (num - 2) * 10,	\
	.enable_mask	= MAX77686_OPMODE_MASK				\
			<< MAX77686_OPMODE_BUCK234_SHIFT,		\
}

static const struct regulator_desc regulators[] = {
	regulator_desc_ldo1_low(1),
	regulator_desc_ldo_low(2),
	regulator_desc_ldo(3),
	regulator_desc_ldo(4),
	regulator_desc_ldo(5),
	regulator_desc_ldo_low(6),
	regulator_desc_ldo_low(7),
	regulator_desc_ldo_low(8),
	regulator_desc_ldo(9),
	regulator_desc_lpm_ldo(10),
	regulator_desc_lpm_ldo(11),
	regulator_desc_lpm_ldo(12),
	regulator_desc_ldo(13),
	regulator_desc_lpm_ldo(14),
	regulator_desc_ldo_low(15),
	regulator_desc_lpm_ldo(16),
	regulator_desc_ldo(17),
	regulator_desc_ldo(18),
	regulator_desc_ldo(19),
	regulator_desc_ldo(20),
	regulator_desc_ldo(21),
	regulator_desc_ldo(22),
	regulator_desc_ldo(23),
	regulator_desc_ldo(24),
	regulator_desc_ldo(25),
	regulator_desc_ldo(26),
	regulator_desc_buck1(1),
	regulator_desc_buck_dvs(2),
	regulator_desc_buck_dvs(3),
	regulator_desc_buck_dvs(4),
	regulator_desc_buck(5),
	regulator_desc_buck(6),
	regulator_desc_buck(7),
	regulator_desc_buck(8),
	regulator_desc_buck(9),
};

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

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

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

	config.dev = iodev->dev;
	config.regmap = iodev->regmap;
	config.driver_data = max77686;
	platform_set_drvdata(pdev, max77686);

	for (i = 0; i < MAX77686_REGULATORS; i++) {
		struct regulator_dev *rdev;
		int id = regulators[i].id;

		max77686->opmode[id] = MAX77686_NORMAL;
		rdev = devm_regulator_register(&pdev->dev,
						&regulators[i], &config);
		if (IS_ERR(rdev)) {
			int ret = PTR_ERR(rdev);
			dev_err(&pdev->dev,
				"regulator init failed for %d: %d\n", i, ret);
			return ret;
		}
	}

	return 0;
}

static const struct platform_device_id max77686_pmic_id[] = {
	{"max77686-pmic", 0},
	{ },
};
MODULE_DEVICE_TABLE(platform, max77686_pmic_id);

static struct platform_driver max77686_pmic_driver = {
	.driver = {
		.name = "max77686-pmic",
	},
	.probe = max77686_pmic_probe,
	.id_table = max77686_pmic_id,
};

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

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

MODULE_DESCRIPTION("MAXIM 77686 Regulator Driver");
MODULE_AUTHOR("Chiwoong Byun <woong.byun@samsung.com>");
MODULE_LICENSE("GPL");
Commit	Line	Data
133d4016 JL	1	/*
	2	* max77686.c - Regulator driver for the Maxim 77686
	3	*
	4	* Copyright (C) 2012 Samsung Electronics
	5	* Chiwoong Byun <woong.byun@smasung.com>
	6	* Jonghwa Lee <jonghwa3.lee@samsung.com>
	7	*
	8	* This program is free software; you can redistribute it and/or modify
	9	* it under the terms of the GNU General Public License as published by
	10	* the Free Software Foundation; either version 2 of the License, or
	11	* (at your option) any later version.
	12	*
	13	* This program is distributed in the hope that it will be useful,
	14	* but WITHOUT ANY WARRANTY; without even the implied warranty of
	15	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
	16	* GNU General Public License for more details.
	17	*
	18	* You should have received a copy of the GNU General Public License
	19	* along with this program; if not, write to the Free Software
	20	* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
	21	*
	22	* This driver is based on max8997.c
	23	*/
	24
	25	#include <linux/kernel.h>
	26	#include <linux/bug.h>
133d4016 JL	27	#include <linux/err.h>
	28	#include <linux/gpio.h>
	29	#include <linux/slab.h>
	30	#include <linux/platform_device.h>
	31	#include <linux/regulator/driver.h>
	32	#include <linux/regulator/machine.h>
4706fcab	33	#include <linux/regulator/of_regulator.h>
133d4016 JL	34	#include <linux/mfd/max77686.h>
	35	#include <linux/mfd/max77686-private.h>
	36
	37	#define MAX77686_LDO_MINUV 800000
	38	#define MAX77686_LDO_UVSTEP 50000
	39	#define MAX77686_LDO_LOW_MINUV 800000
	40	#define MAX77686_LDO_LOW_UVSTEP 25000
	41	#define MAX77686_BUCK_MINUV 750000
	42	#define MAX77686_BUCK_UVSTEP 50000
852abad2 YSB	43	#define MAX77686_RAMP_DELAY 100000 /* uV/us */
852abad2 YSB	44	#define MAX77686_DVS_RAMP_DELAY 27500 /* uV/us */
133d4016 JL	45	#define MAX77686_DVS_MINUV 600000
	46	#define MAX77686_DVS_UVSTEP 12500
	47
7636f19c KK	48	/*
	49	* Values used for configuring LDOs and bucks.
	50	* Forcing low power mode: LDO1, 3-5, 9, 13, 17-26
	51	*/
	52	#define MAX77686_LDO_LOWPOWER 0x1
	53	/*
	54	* On/off controlled by PWRREQ:
	55	* - LDO2, 6-8, 10-12, 14-16
	56	* - buck[1234]
	57	*/
	58	#define MAX77686_OFF_PWRREQ 0x1
	59	/* Low power mode controlled by PWRREQ: All LDOs */
	60	#define MAX77686_LDO_LOWPOWER_PWRREQ 0x2
	61	/* Forcing low power mode: buck[234] */
	62	#define MAX77686_BUCK_LOWPOWER 0x2
	63	#define MAX77686_NORMAL 0x3
	64
133d4016 JL	65	#define MAX77686_OPMODE_SHIFT 6
	66	#define MAX77686_OPMODE_BUCK234_SHIFT 4
	67	#define MAX77686_OPMODE_MASK 0x3
	68
	69	#define MAX77686_VSEL_MASK 0x3F
	70	#define MAX77686_DVS_VSEL_MASK 0xFF
	71
	72	#define MAX77686_RAMP_RATE_MASK 0xC0
	73
	74	#define MAX77686_REGULATORS MAX77686_REG_MAX
	75	#define MAX77686_LDOS 26
	76
	77	enum max77686_ramp_rate {
	78	RAMP_RATE_13P75MV,
	79	RAMP_RATE_27P5MV,
	80	RAMP_RATE_55MV,
	81	RAMP_RATE_NO_CTRL, /* 100mV/us */
	82	};
	83
	84	struct max77686_data {
eca29da9	85	/* Array indexed by regulator id */
6d2c896b	86	unsigned int opmode[MAX77686_REGULATORS];
133d4016 JL	87	};
133d4016 JL	88
68c5d186 KK	89	static unsigned int max77686_get_opmode_shift(int id)
	90	{
	91	switch (id) {
	92	case MAX77686_BUCK1:
	93	case MAX77686_BUCK5 ... MAX77686_BUCK9:
	94	return 0;
	95	case MAX77686_BUCK2 ... MAX77686_BUCK4:
	96	return MAX77686_OPMODE_BUCK234_SHIFT;
	97	default:
	98	/* all LDOs */
	99	return MAX77686_OPMODE_SHIFT;
	100	}
	101	}
	102
78ce6128 KK	103	/* Some BUCKs and LDOs supports Normal[ON/OFF] mode during suspend */
78ce6128 KK	104	static int max77686_set_suspend_disable(struct regulator_dev *rdev)
15282ba9	105	{
68c5d186	106	unsigned int val, shift;
15282ba9	107	struct max77686_data *max77686 = rdev_get_drvdata(rdev);
3ecf198e	108	int ret, id = rdev_get_id(rdev);
15282ba9	109
68c5d186 KK	110	shift = max77686_get_opmode_shift(id);
68c5d186 KK	111	val = MAX77686_OFF_PWRREQ;
15282ba9	112
3ecf198e	113	ret = regmap_update_bits(rdev->regmap, rdev->desc->enable_reg,
68c5d186	114	rdev->desc->enable_mask, val << shift);
3ecf198e AL	115	if (ret)
	116	return ret;
	117
40e72149	118	max77686->opmode[id] = val;
3ecf198e	119	return 0;
15282ba9 YSB	120	}
	121
	122	/* Some LDOs supports [LPM/Normal]ON mode during suspend state */
	123	static int max77686_set_suspend_mode(struct regulator_dev *rdev,
	124	unsigned int mode)
	125	{
	126	struct max77686_data *max77686 = rdev_get_drvdata(rdev);
	127	unsigned int val;
3ecf198e	128	int ret, id = rdev_get_id(rdev);
15282ba9 YSB	129
15282ba9 YSB	130	/* BUCK[5-9] doesn't support this feature */
40e72149	131	if (id >= MAX77686_BUCK5)
15282ba9 YSB	132	return 0;
	133
	134	switch (mode) {
	135	case REGULATOR_MODE_IDLE: /* ON in LP Mode */
68c5d186	136	val = MAX77686_LDO_LOWPOWER_PWRREQ;
15282ba9 YSB	137	break;
15282ba9 YSB	138	case REGULATOR_MODE_NORMAL: /* ON in Normal Mode */
68c5d186	139	val = MAX77686_NORMAL;
15282ba9 YSB	140	break;
	141	default:
	142	pr_warn("%s: regulator_suspend_mode : 0x%x not supported\n",
	143	rdev->desc->name, mode);
	144	return -EINVAL;
	145	}
	146
3ecf198e	147	ret = regmap_update_bits(rdev->regmap, rdev->desc->enable_reg,
68c5d186 KK	148	rdev->desc->enable_mask,
68c5d186 KK	149	val << MAX77686_OPMODE_SHIFT);
3ecf198e AL	150	if (ret)
	151	return ret;
	152
40e72149	153	max77686->opmode[id] = val;
3ecf198e	154	return 0;
15282ba9 YSB	155	}
	156
	157	/* Some LDOs supports LPM-ON/OFF/Normal-ON mode during suspend state */
	158	static int max77686_ldo_set_suspend_mode(struct regulator_dev *rdev,
	159	unsigned int mode)
	160	{
	161	unsigned int val;
	162	struct max77686_data *max77686 = rdev_get_drvdata(rdev);
3ecf198e	163	int ret;
15282ba9 YSB	164
	165	switch (mode) {
	166	case REGULATOR_MODE_STANDBY: /* switch off */
68c5d186	167	val = MAX77686_OFF_PWRREQ;
15282ba9 YSB	168	break;
15282ba9 YSB	169	case REGULATOR_MODE_IDLE: /* ON in LP Mode */
68c5d186	170	val = MAX77686_LDO_LOWPOWER_PWRREQ;
15282ba9 YSB	171	break;
15282ba9 YSB	172	case REGULATOR_MODE_NORMAL: /* ON in Normal Mode */
68c5d186	173	val = MAX77686_NORMAL;
15282ba9 YSB	174	break;
	175	default:
	176	pr_warn("%s: regulator_suspend_mode : 0x%x not supported\n",
	177	rdev->desc->name, mode);
	178	return -EINVAL;
	179	}
	180
3ecf198e	181	ret = regmap_update_bits(rdev->regmap, rdev->desc->enable_reg,
68c5d186 KK	182	rdev->desc->enable_mask,
68c5d186 KK	183	val << MAX77686_OPMODE_SHIFT);
3ecf198e AL	184	if (ret)
	185	return ret;
	186
40e72149	187	max77686->opmode[rdev_get_id(rdev)] = val;
3ecf198e	188	return 0;
15282ba9 YSB	189	}
15282ba9 YSB	190
38d34035	191	static int max77686_enable(struct regulator_dev *rdev)
6d2c896b YSB	192	{
6d2c896b YSB	193	struct max77686_data *max77686 = rdev_get_drvdata(rdev);
68c5d186 KK	194	unsigned int shift;
	195	int id = rdev_get_id(rdev);
	196
	197	shift = max77686_get_opmode_shift(id);
6d2c896b	198
78ce6128 KK	199	if (max77686->opmode[id] == MAX77686_OFF_PWRREQ)
	200	max77686->opmode[id] = MAX77686_NORMAL;
	201
6d2c896b YSB	202	return regmap_update_bits(rdev->regmap, rdev->desc->enable_reg,
6d2c896b YSB	203	rdev->desc->enable_mask,
68c5d186	204	max77686->opmode[id] << shift);
6d2c896b YSB	205	}
6d2c896b YSB	206
f503071b YSB	207	static int max77686_set_ramp_delay(struct regulator_dev *rdev, int ramp_delay)
	208	{
	209	unsigned int ramp_value = RAMP_RATE_NO_CTRL;
	210
	211	switch (ramp_delay) {
	212	case 1 ... 13750:
	213	ramp_value = RAMP_RATE_13P75MV;
	214	break;
	215	case 13751 ... 27500:
	216	ramp_value = RAMP_RATE_27P5MV;
	217	break;
	218	case 27501 ... 55000:
	219	ramp_value = RAMP_RATE_55MV;
	220	break;
	221	case 55001 ... 100000:
	222	break;
	223	default:
	224	pr_warn("%s: ramp_delay: %d not supported, setting 100000\n",
	225	rdev->desc->name, ramp_delay);
	226	}
	227
	228	return regmap_update_bits(rdev->regmap, rdev->desc->enable_reg,
	229	MAX77686_RAMP_RATE_MASK, ramp_value << 6);
	230	}
	231
133d4016 JL	232	static struct regulator_ops max77686_ops = {
133d4016 JL	233	.list_voltage = regulator_list_voltage_linear,
2e3f7f26	234	.map_voltage = regulator_map_voltage_linear,
133d4016	235	.is_enabled = regulator_is_enabled_regmap,
6d2c896b	236	.enable = max77686_enable,
133d4016 JL	237	.disable = regulator_disable_regmap,
	238	.get_voltage_sel = regulator_get_voltage_sel_regmap,
	239	.set_voltage_sel = regulator_set_voltage_sel_regmap,
852abad2	240	.set_voltage_time_sel = regulator_set_voltage_time_sel,
15282ba9 YSB	241	.set_suspend_mode = max77686_set_suspend_mode,
	242	};
	243
	244	static struct regulator_ops max77686_ldo_ops = {
	245	.list_voltage = regulator_list_voltage_linear,
	246	.map_voltage = regulator_map_voltage_linear,
	247	.is_enabled = regulator_is_enabled_regmap,
	248	.enable = max77686_enable,
133d4016 JL	249	.disable = regulator_disable_regmap,
	250	.get_voltage_sel = regulator_get_voltage_sel_regmap,
	251	.set_voltage_sel = regulator_set_voltage_sel_regmap,
852abad2	252	.set_voltage_time_sel = regulator_set_voltage_time_sel,
15282ba9	253	.set_suspend_mode = max77686_ldo_set_suspend_mode,
78ce6128	254	.set_suspend_disable = max77686_set_suspend_disable,
15282ba9 YSB	255	};
	256
	257	static struct regulator_ops max77686_buck1_ops = {
	258	.list_voltage = regulator_list_voltage_linear,
	259	.map_voltage = regulator_map_voltage_linear,
	260	.is_enabled = regulator_is_enabled_regmap,
	261	.enable = max77686_enable,
	262	.disable = regulator_disable_regmap,
	263	.get_voltage_sel = regulator_get_voltage_sel_regmap,
	264	.set_voltage_sel = regulator_set_voltage_sel_regmap,
	265	.set_voltage_time_sel = regulator_set_voltage_time_sel,
78ce6128	266	.set_suspend_disable = max77686_set_suspend_disable,
133d4016 JL	267	};
	268
	269	static struct regulator_ops max77686_buck_dvs_ops = {
	270	.list_voltage = regulator_list_voltage_linear,
2e3f7f26	271	.map_voltage = regulator_map_voltage_linear,
133d4016	272	.is_enabled = regulator_is_enabled_regmap,
6d2c896b	273	.enable = max77686_enable,
133d4016 JL	274	.disable = regulator_disable_regmap,
	275	.get_voltage_sel = regulator_get_voltage_sel_regmap,
	276	.set_voltage_sel = regulator_set_voltage_sel_regmap,
852abad2	277	.set_voltage_time_sel = regulator_set_voltage_time_sel,
f503071b	278	.set_ramp_delay = max77686_set_ramp_delay,
78ce6128	279	.set_suspend_disable = max77686_set_suspend_disable,
133d4016 JL	280	};
	281
	282	#define regulator_desc_ldo(num) { \
	283	.name = "LDO"#num, \
04803952 KK	284	.of_match = of_match_ptr("LDO"#num), \
04803952 KK	285	.regulators_node = of_match_ptr("voltage-regulators"), \
133d4016 JL	286	.id = MAX77686_LDO##num, \
	287	.ops = &max77686_ops, \
	288	.type = REGULATOR_VOLTAGE, \
	289	.owner = THIS_MODULE, \
	290	.min_uV = MAX77686_LDO_MINUV, \
	291	.uV_step = MAX77686_LDO_UVSTEP, \
852abad2	292	.ramp_delay = MAX77686_RAMP_DELAY, \
133d4016 JL	293	.n_voltages = MAX77686_VSEL_MASK + 1, \
	294	.vsel_reg = MAX77686_REG_LDO1CTRL1 + num - 1, \
	295	.vsel_mask = MAX77686_VSEL_MASK, \
	296	.enable_reg = MAX77686_REG_LDO1CTRL1 + num - 1, \
	297	.enable_mask = MAX77686_OPMODE_MASK \
	298	<< MAX77686_OPMODE_SHIFT, \
	299	}
15282ba9 YSB	300	#define regulator_desc_lpm_ldo(num) { \
15282ba9 YSB	301	.name = "LDO"#num, \
04803952 KK	302	.of_match = of_match_ptr("LDO"#num), \
04803952 KK	303	.regulators_node = of_match_ptr("voltage-regulators"), \
15282ba9 YSB	304	.id = MAX77686_LDO##num, \
	305	.ops = &max77686_ldo_ops, \
	306	.type = REGULATOR_VOLTAGE, \
	307	.owner = THIS_MODULE, \
	308	.min_uV = MAX77686_LDO_MINUV, \
	309	.uV_step = MAX77686_LDO_UVSTEP, \
	310	.ramp_delay = MAX77686_RAMP_DELAY, \
	311	.n_voltages = MAX77686_VSEL_MASK + 1, \
	312	.vsel_reg = MAX77686_REG_LDO1CTRL1 + num - 1, \
	313	.vsel_mask = MAX77686_VSEL_MASK, \
	314	.enable_reg = MAX77686_REG_LDO1CTRL1 + num - 1, \
	315	.enable_mask = MAX77686_OPMODE_MASK \
	316	<< MAX77686_OPMODE_SHIFT, \
	317	}
133d4016	318	#define regulator_desc_ldo_low(num) { \
15282ba9	319	.name = "LDO"#num, \
04803952 KK	320	.of_match = of_match_ptr("LDO"#num), \
04803952 KK	321	.regulators_node = of_match_ptr("voltage-regulators"), \
15282ba9 YSB	322	.id = MAX77686_LDO##num, \
	323	.ops = &max77686_ldo_ops, \
	324	.type = REGULATOR_VOLTAGE, \
	325	.owner = THIS_MODULE, \
	326	.min_uV = MAX77686_LDO_LOW_MINUV, \
	327	.uV_step = MAX77686_LDO_LOW_UVSTEP, \
	328	.ramp_delay = MAX77686_RAMP_DELAY, \
	329	.n_voltages = MAX77686_VSEL_MASK + 1, \
	330	.vsel_reg = MAX77686_REG_LDO1CTRL1 + num - 1, \
	331	.vsel_mask = MAX77686_VSEL_MASK, \
	332	.enable_reg = MAX77686_REG_LDO1CTRL1 + num - 1, \
	333	.enable_mask = MAX77686_OPMODE_MASK \
	334	<< MAX77686_OPMODE_SHIFT, \
	335	}
	336	#define regulator_desc_ldo1_low(num) { \
133d4016	337	.name = "LDO"#num, \
04803952 KK	338	.of_match = of_match_ptr("LDO"#num), \
04803952 KK	339	.regulators_node = of_match_ptr("voltage-regulators"), \
133d4016 JL	340	.id = MAX77686_LDO##num, \
	341	.ops = &max77686_ops, \
	342	.type = REGULATOR_VOLTAGE, \
	343	.owner = THIS_MODULE, \
	344	.min_uV = MAX77686_LDO_LOW_MINUV, \
	345	.uV_step = MAX77686_LDO_LOW_UVSTEP, \
852abad2	346	.ramp_delay = MAX77686_RAMP_DELAY, \
133d4016 JL	347	.n_voltages = MAX77686_VSEL_MASK + 1, \
	348	.vsel_reg = MAX77686_REG_LDO1CTRL1 + num - 1, \
	349	.vsel_mask = MAX77686_VSEL_MASK, \
	350	.enable_reg = MAX77686_REG_LDO1CTRL1 + num - 1, \
	351	.enable_mask = MAX77686_OPMODE_MASK \
	352	<< MAX77686_OPMODE_SHIFT, \
	353	}
	354	#define regulator_desc_buck(num) { \
	355	.name = "BUCK"#num, \
04803952 KK	356	.of_match = of_match_ptr("BUCK"#num), \
04803952 KK	357	.regulators_node = of_match_ptr("voltage-regulators"), \
133d4016 JL	358	.id = MAX77686_BUCK##num, \
	359	.ops = &max77686_ops, \
	360	.type = REGULATOR_VOLTAGE, \
	361	.owner = THIS_MODULE, \
	362	.min_uV = MAX77686_BUCK_MINUV, \
	363	.uV_step = MAX77686_BUCK_UVSTEP, \
852abad2	364	.ramp_delay = MAX77686_RAMP_DELAY, \
133d4016 JL	365	.n_voltages = MAX77686_VSEL_MASK + 1, \
	366	.vsel_reg = MAX77686_REG_BUCK5OUT + (num - 5) * 2, \
	367	.vsel_mask = MAX77686_VSEL_MASK, \
	368	.enable_reg = MAX77686_REG_BUCK5CTRL + (num - 5) * 2, \
	369	.enable_mask = MAX77686_OPMODE_MASK, \
	370	}
	371	#define regulator_desc_buck1(num) { \
	372	.name = "BUCK"#num, \
04803952 KK	373	.of_match = of_match_ptr("BUCK"#num), \
04803952 KK	374	.regulators_node = of_match_ptr("voltage-regulators"), \
133d4016	375	.id = MAX77686_BUCK##num, \
15282ba9	376	.ops = &max77686_buck1_ops, \
133d4016 JL	377	.type = REGULATOR_VOLTAGE, \
	378	.owner = THIS_MODULE, \
	379	.min_uV = MAX77686_BUCK_MINUV, \
	380	.uV_step = MAX77686_BUCK_UVSTEP, \
852abad2	381	.ramp_delay = MAX77686_RAMP_DELAY, \
133d4016 JL	382	.n_voltages = MAX77686_VSEL_MASK + 1, \
	383	.vsel_reg = MAX77686_REG_BUCK1OUT, \
	384	.vsel_mask = MAX77686_VSEL_MASK, \
	385	.enable_reg = MAX77686_REG_BUCK1CTRL, \
	386	.enable_mask = MAX77686_OPMODE_MASK, \
	387	}
	388	#define regulator_desc_buck_dvs(num) { \
	389	.name = "BUCK"#num, \
04803952 KK	390	.of_match = of_match_ptr("BUCK"#num), \
04803952 KK	391	.regulators_node = of_match_ptr("voltage-regulators"), \
133d4016	392	.id = MAX77686_BUCK##num, \
74adfee5	393	.ops = &max77686_buck_dvs_ops, \
133d4016 JL	394	.type = REGULATOR_VOLTAGE, \
	395	.owner = THIS_MODULE, \
	396	.min_uV = MAX77686_DVS_MINUV, \
	397	.uV_step = MAX77686_DVS_UVSTEP, \
852abad2	398	.ramp_delay = MAX77686_DVS_RAMP_DELAY, \
133d4016 JL	399	.n_voltages = MAX77686_DVS_VSEL_MASK + 1, \
	400	.vsel_reg = MAX77686_REG_BUCK2DVS1 + (num - 2) * 10, \
	401	.vsel_mask = MAX77686_DVS_VSEL_MASK, \
	402	.enable_reg = MAX77686_REG_BUCK2CTRL1 + (num - 2) * 10, \
	403	.enable_mask = MAX77686_OPMODE_MASK \
	404	<< MAX77686_OPMODE_BUCK234_SHIFT, \
	405	}
	406
73dbdf8f	407	static const struct regulator_desc regulators[] = {
15282ba9	408	regulator_desc_ldo1_low(1),
133d4016 JL	409	regulator_desc_ldo_low(2),
	410	regulator_desc_ldo(3),
	411	regulator_desc_ldo(4),
	412	regulator_desc_ldo(5),
	413	regulator_desc_ldo_low(6),
	414	regulator_desc_ldo_low(7),
	415	regulator_desc_ldo_low(8),
	416	regulator_desc_ldo(9),
15282ba9 YSB	417	regulator_desc_lpm_ldo(10),
	418	regulator_desc_lpm_ldo(11),
	419	regulator_desc_lpm_ldo(12),
133d4016	420	regulator_desc_ldo(13),
15282ba9	421	regulator_desc_lpm_ldo(14),
133d4016	422	regulator_desc_ldo_low(15),
15282ba9	423	regulator_desc_lpm_ldo(16),
133d4016 JL	424	regulator_desc_ldo(17),
	425	regulator_desc_ldo(18),
	426	regulator_desc_ldo(19),
	427	regulator_desc_ldo(20),
	428	regulator_desc_ldo(21),
	429	regulator_desc_ldo(22),
	430	regulator_desc_ldo(23),
	431	regulator_desc_ldo(24),
	432	regulator_desc_ldo(25),
	433	regulator_desc_ldo(26),
	434	regulator_desc_buck1(1),
	435	regulator_desc_buck_dvs(2),
	436	regulator_desc_buck_dvs(3),
	437	regulator_desc_buck_dvs(4),
	438	regulator_desc_buck(5),
	439	regulator_desc_buck(6),
	440	regulator_desc_buck(7),
	441	regulator_desc_buck(8),
	442	regulator_desc_buck(9),
	443	};
	444
a5023574	445	static int max77686_pmic_probe(struct platform_device *pdev)
133d4016 JL	446	{
133d4016 JL	447	struct max77686_dev *iodev = dev_get_drvdata(pdev->dev.parent);
133d4016	448	struct max77686_data *max77686;
04803952	449	int i;
c59d2a6b	450	struct regulator_config config = { };
133d4016 JL	451
	452	dev_dbg(&pdev->dev, "%s\n", __func__);
	453
	454	max77686 = devm_kzalloc(&pdev->dev, sizeof(struct max77686_data),
	455	GFP_KERNEL);
	456	if (!max77686)
	457	return -ENOMEM;
	458
04803952	459	config.dev = iodev->dev;
f503071b	460	config.regmap = iodev->regmap;
6d2c896b	461	config.driver_data = max77686;
133d4016 JL	462	platform_set_drvdata(pdev, max77686);
133d4016 JL	463
ab0d1cbe	464	for (i = 0; i < MAX77686_REGULATORS; i++) {
b0c13e80	465	struct regulator_dev *rdev;
eca29da9	466	int id = regulators[i].id;
b0c13e80	467
4524df83	468	max77686->opmode[id] = MAX77686_NORMAL;
b0c13e80	469	rdev = devm_regulator_register(&pdev->dev,
44815b4a	470	&regulators[i], &config);
b0c13e80	471	if (IS_ERR(rdev)) {
04803952	472	int ret = PTR_ERR(rdev);
f503071b	473	dev_err(&pdev->dev,
04803952 KK	474	"regulator init failed for %d: %d\n", i, ret);
04803952 KK	475	return ret;
133d4016	476	}
133d4016	477	}
ab0d1cbe	478
133d4016 JL	479	return 0;
	480	}
	481
	482	static const struct platform_device_id max77686_pmic_id[] = {
	483	{"max77686-pmic", 0},
	484	{ },
	485	};
	486	MODULE_DEVICE_TABLE(platform, max77686_pmic_id);
	487
	488	static struct platform_driver max77686_pmic_driver = {
	489	.driver = {
	490	.name = "max77686-pmic",
133d4016 JL	491	},
133d4016 JL	492	.probe = max77686_pmic_probe,
133d4016 JL	493	.id_table = max77686_pmic_id,
	494	};
	495
	496	static int __init max77686_pmic_init(void)
	497	{
	498	return platform_driver_register(&max77686_pmic_driver);
	499	}
	500	subsys_initcall(max77686_pmic_init);
	501
	502	static void __exit max77686_pmic_cleanup(void)
	503	{
	504	platform_driver_unregister(&max77686_pmic_driver);
	505	}
	506	module_exit(max77686_pmic_cleanup);
	507
	508	MODULE_DESCRIPTION("MAXIM 77686 Regulator Driver");
	509	MODULE_AUTHOR("Chiwoong Byun <woong.byun@samsung.com>");
	510	MODULE_LICENSE("GPL");