[mirror_ubuntu-artful-kernel.git] / drivers / regulator / s2mpa01.c

/*
 * Copyright (c) 2013 Samsung Electronics Co., Ltd
 *		http://www.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.
 *
 */

#include <linux/bug.h>
#include <linux/err.h>
#include <linux/gpio.h>
#include <linux/slab.h>
#include <linux/module.h>
#include <linux/of.h>
#include <linux/regmap.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/samsung/core.h>
#include <linux/mfd/samsung/s2mpa01.h>

#define S2MPA01_REGULATOR_CNT ARRAY_SIZE(regulators)

struct s2mpa01_info {
	struct of_regulator_match rdata[S2MPA01_REGULATOR_MAX];
	int ramp_delay24;
	int ramp_delay3;
	int ramp_delay5;
	int ramp_delay16;
	int ramp_delay7;
	int ramp_delay8910;
};

static int get_ramp_delay(int ramp_delay)
{
	unsigned char cnt = 0;

	ramp_delay /= 6250;

	while (true) {
		ramp_delay = ramp_delay >> 1;
		if (ramp_delay == 0)
			break;
		cnt++;
	}

	if (cnt > 3)
		cnt = 3;

	return cnt;
}

static int s2mpa01_regulator_set_voltage_time_sel(struct regulator_dev *rdev,
				   unsigned int old_selector,
				   unsigned int new_selector)
{
	struct s2mpa01_info *s2mpa01 = rdev_get_drvdata(rdev);
	unsigned int ramp_delay = 0;
	int old_volt, new_volt;

	switch (rdev_get_id(rdev)) {
	case S2MPA01_BUCK2:
	case S2MPA01_BUCK4:
		ramp_delay = s2mpa01->ramp_delay24;
		break;
	case S2MPA01_BUCK3:
		ramp_delay = s2mpa01->ramp_delay3;
		break;
	case S2MPA01_BUCK5:
		ramp_delay = s2mpa01->ramp_delay5;
		break;
	case S2MPA01_BUCK1:
	case S2MPA01_BUCK6:
		ramp_delay = s2mpa01->ramp_delay16;
		break;
	case S2MPA01_BUCK7:
		ramp_delay = s2mpa01->ramp_delay7;
		break;
	case S2MPA01_BUCK8:
	case S2MPA01_BUCK9:
	case S2MPA01_BUCK10:
		ramp_delay = s2mpa01->ramp_delay8910;
		break;
	}

	if (ramp_delay == 0)
		ramp_delay = rdev->desc->ramp_delay;

	old_volt = rdev->desc->min_uV + (rdev->desc->uV_step * old_selector);
	new_volt = rdev->desc->min_uV + (rdev->desc->uV_step * new_selector);

	return DIV_ROUND_UP(abs(new_volt - old_volt), ramp_delay);
}

static int s2mpa01_set_ramp_delay(struct regulator_dev *rdev, int ramp_delay)
{
	struct s2mpa01_info *s2mpa01 = rdev_get_drvdata(rdev);
	unsigned int ramp_val, ramp_shift, ramp_reg = S2MPA01_REG_RAMP2;
	unsigned int ramp_enable = 1, enable_shift = 0;
	int ret;

	switch (rdev_get_id(rdev)) {
	case S2MPA01_BUCK1:
		enable_shift = S2MPA01_BUCK1_RAMP_EN_SHIFT;
		if (!ramp_delay) {
			ramp_enable = 0;
			break;
		}

		if (ramp_delay > s2mpa01->ramp_delay16)
			s2mpa01->ramp_delay16 = ramp_delay;
		else
			ramp_delay = s2mpa01->ramp_delay16;

		ramp_shift = S2MPA01_BUCK16_RAMP_SHIFT;
		break;
	case S2MPA01_BUCK2:
		enable_shift = S2MPA01_BUCK2_RAMP_EN_SHIFT;
		if (!ramp_delay) {
			ramp_enable = 0;
			break;
		}

		if (ramp_delay > s2mpa01->ramp_delay24)
			s2mpa01->ramp_delay24 = ramp_delay;
		else
			ramp_delay = s2mpa01->ramp_delay24;

		ramp_shift = S2MPA01_BUCK24_RAMP_SHIFT;
		ramp_reg = S2MPA01_REG_RAMP1;
		break;
	case S2MPA01_BUCK3:
		enable_shift = S2MPA01_BUCK3_RAMP_EN_SHIFT;
		if (!ramp_delay) {
			ramp_enable = 0;
			break;
		}

		s2mpa01->ramp_delay3 = ramp_delay;
		ramp_shift = S2MPA01_BUCK3_RAMP_SHIFT;
		ramp_reg = S2MPA01_REG_RAMP1;
		break;
	case S2MPA01_BUCK4:
		enable_shift = S2MPA01_BUCK4_RAMP_EN_SHIFT;
		if (!ramp_delay) {
			ramp_enable = 0;
			break;
		}

		if (ramp_delay > s2mpa01->ramp_delay24)
			s2mpa01->ramp_delay24 = ramp_delay;
		else
			ramp_delay = s2mpa01->ramp_delay24;

		ramp_shift = S2MPA01_BUCK24_RAMP_SHIFT;
		ramp_reg = S2MPA01_REG_RAMP1;
		break;
	case S2MPA01_BUCK5:
		s2mpa01->ramp_delay5 = ramp_delay;
		ramp_shift = S2MPA01_BUCK5_RAMP_SHIFT;
		break;
	case S2MPA01_BUCK6:
		if (ramp_delay > s2mpa01->ramp_delay16)
			s2mpa01->ramp_delay16 = ramp_delay;
		else
			ramp_delay = s2mpa01->ramp_delay16;

		ramp_shift = S2MPA01_BUCK16_RAMP_SHIFT;
		break;
	case S2MPA01_BUCK7:
		s2mpa01->ramp_delay7 = ramp_delay;
		ramp_shift = S2MPA01_BUCK7_RAMP_SHIFT;
		break;
	case S2MPA01_BUCK8:
	case S2MPA01_BUCK9:
	case S2MPA01_BUCK10:
		if (ramp_delay > s2mpa01->ramp_delay8910)
			s2mpa01->ramp_delay8910 = ramp_delay;
		else
			ramp_delay = s2mpa01->ramp_delay8910;

		ramp_shift = S2MPA01_BUCK8910_RAMP_SHIFT;
		break;
	default:
		return 0;
	}

	if (!ramp_enable)
		goto ramp_disable;

	/* Ramp delay can be enabled/disabled only for buck[1234] */
	if (rdev_get_id(rdev) >= S2MPA01_BUCK1 &&
			rdev_get_id(rdev) <= S2MPA01_BUCK4) {
		ret = regmap_update_bits(rdev->regmap, S2MPA01_REG_RAMP1,
					 1 << enable_shift, 1 << enable_shift);
		if (ret) {
			dev_err(&rdev->dev, "failed to enable ramp rate\n");
			return ret;
		}
	}

	ramp_val = get_ramp_delay(ramp_delay);

	return regmap_update_bits(rdev->regmap, ramp_reg, 0x3 << ramp_shift,
				  ramp_val << ramp_shift);

ramp_disable:
	return regmap_update_bits(rdev->regmap, S2MPA01_REG_RAMP1,
				  1 << enable_shift, 0);
}

static struct regulator_ops s2mpa01_ldo_ops = {
	.list_voltage		= regulator_list_voltage_linear,
	.map_voltage		= regulator_map_voltage_linear,
	.is_enabled		= regulator_is_enabled_regmap,
	.enable			= regulator_enable_regmap,
	.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,
};

static struct regulator_ops s2mpa01_buck_ops = {
	.list_voltage		= regulator_list_voltage_linear,
	.map_voltage		= regulator_map_voltage_linear,
	.is_enabled		= regulator_is_enabled_regmap,
	.enable			= regulator_enable_regmap,
	.disable		= regulator_disable_regmap,
	.get_voltage_sel	= regulator_get_voltage_sel_regmap,
	.set_voltage_sel	= regulator_set_voltage_sel_regmap,
	.set_voltage_time_sel	= s2mpa01_regulator_set_voltage_time_sel,
	.set_ramp_delay		= s2mpa01_set_ramp_delay,
};

#define regulator_desc_ldo(num, step) {			\
	.name		= "LDO"#num,			\
	.id		= S2MPA01_LDO##num,		\
	.ops		= &s2mpa01_ldo_ops,		\
	.type		= REGULATOR_VOLTAGE,		\
	.owner		= THIS_MODULE,			\
	.min_uV		= MIN_800_MV,			\
	.uV_step	= step,				\
	.n_voltages	= S2MPA01_LDO_N_VOLTAGES,	\
	.vsel_reg	= S2MPA01_REG_L1CTRL + num - 1,	\
	.vsel_mask	= S2MPA01_LDO_VSEL_MASK,	\
	.enable_reg	= S2MPA01_REG_L1CTRL + num - 1,	\
	.enable_mask	= S2MPA01_ENABLE_MASK		\
}

#define regulator_desc_buck1_4(num)	{			\
	.name		= "BUCK"#num,				\
	.id		= S2MPA01_BUCK##num,			\
	.ops		= &s2mpa01_buck_ops,			\
	.type		= REGULATOR_VOLTAGE,			\
	.owner		= THIS_MODULE,				\
	.min_uV		= MIN_600_MV,				\
	.uV_step	= STEP_6_25_MV,				\
	.n_voltages	= S2MPA01_BUCK_N_VOLTAGES,		\
	.ramp_delay	= S2MPA01_RAMP_DELAY,			\
	.vsel_reg	= S2MPA01_REG_B1CTRL2 + (num - 1) * 2,	\
	.vsel_mask	= S2MPA01_BUCK_VSEL_MASK,		\
	.enable_reg	= S2MPA01_REG_B1CTRL1 + (num - 1) * 2,	\
	.enable_mask	= S2MPA01_ENABLE_MASK			\
}

#define regulator_desc_buck5	{				\
	.name		= "BUCK5",				\
	.id		= S2MPA01_BUCK5,			\
	.ops		= &s2mpa01_buck_ops,			\
	.type		= REGULATOR_VOLTAGE,			\
	.owner		= THIS_MODULE,				\
	.min_uV		= MIN_800_MV,				\
	.uV_step	= STEP_6_25_MV,				\
	.n_voltages	= S2MPA01_BUCK_N_VOLTAGES,		\
	.ramp_delay	= S2MPA01_RAMP_DELAY,			\
	.vsel_reg	= S2MPA01_REG_B5CTRL2,			\
	.vsel_mask	= S2MPA01_BUCK_VSEL_MASK,		\
	.enable_reg	= S2MPA01_REG_B5CTRL1,			\
	.enable_mask	= S2MPA01_ENABLE_MASK			\
}

#define regulator_desc_buck6_10(num, min, step) {			\
	.name		= "BUCK"#num,				\
	.id		= S2MPA01_BUCK##num,			\
	.ops		= &s2mpa01_buck_ops,			\
	.type		= REGULATOR_VOLTAGE,			\
	.owner		= THIS_MODULE,				\
	.min_uV		= min,					\
	.uV_step	= step,					\
	.n_voltages	= S2MPA01_BUCK_N_VOLTAGES,		\
	.ramp_delay	= S2MPA01_RAMP_DELAY,			\
	.vsel_reg	= S2MPA01_REG_B6CTRL2 + (num - 6) * 2,	\
	.vsel_mask	= S2MPA01_BUCK_VSEL_MASK,		\
	.enable_reg	= S2MPA01_REG_B6CTRL1 + (num - 6) * 2,	\
	.enable_mask	= S2MPA01_ENABLE_MASK			\
}

static const struct regulator_desc regulators[] = {
	regulator_desc_ldo(1, STEP_25_MV),
	regulator_desc_ldo(2, STEP_50_MV),
	regulator_desc_ldo(3, STEP_50_MV),
	regulator_desc_ldo(4, STEP_50_MV),
	regulator_desc_ldo(5, STEP_50_MV),
	regulator_desc_ldo(6, STEP_25_MV),
	regulator_desc_ldo(7, STEP_50_MV),
	regulator_desc_ldo(8, STEP_50_MV),
	regulator_desc_ldo(9, STEP_50_MV),
	regulator_desc_ldo(10, STEP_50_MV),
	regulator_desc_ldo(11, STEP_25_MV),
	regulator_desc_ldo(12, STEP_50_MV),
	regulator_desc_ldo(13, STEP_50_MV),
	regulator_desc_ldo(14, STEP_50_MV),
	regulator_desc_ldo(15, STEP_50_MV),
	regulator_desc_ldo(16, STEP_50_MV),
	regulator_desc_ldo(17, STEP_50_MV),
	regulator_desc_ldo(18, STEP_50_MV),
	regulator_desc_ldo(19, STEP_50_MV),
	regulator_desc_ldo(20, STEP_50_MV),
	regulator_desc_ldo(21, STEP_50_MV),
	regulator_desc_ldo(22, STEP_25_MV),
	regulator_desc_ldo(23, STEP_25_MV),
	regulator_desc_ldo(24, STEP_50_MV),
	regulator_desc_ldo(25, STEP_50_MV),
	regulator_desc_ldo(26, STEP_50_MV),
	regulator_desc_buck1_4(1),
	regulator_desc_buck1_4(2),
	regulator_desc_buck1_4(3),
	regulator_desc_buck1_4(4),
	regulator_desc_buck5,
	regulator_desc_buck6_10(6, MIN_600_MV, STEP_6_25_MV),
	regulator_desc_buck6_10(7, MIN_600_MV, STEP_6_25_MV),
	regulator_desc_buck6_10(8, MIN_800_MV, STEP_12_5_MV),
	regulator_desc_buck6_10(9, MIN_1500_MV, STEP_12_5_MV),
	regulator_desc_buck6_10(10, MIN_1000_MV, STEP_12_5_MV),
};

static int s2mpa01_pmic_probe(struct platform_device *pdev)
{
	struct sec_pmic_dev *iodev = dev_get_drvdata(pdev->dev.parent);
	struct sec_platform_data *pdata = dev_get_platdata(iodev->dev);
	struct device_node *reg_np = NULL;
	struct regulator_config config = { };
	struct of_regulator_match *rdata;
	struct s2mpa01_info *s2mpa01;
	int i;

	s2mpa01 = devm_kzalloc(&pdev->dev, sizeof(*s2mpa01), GFP_KERNEL);
	if (!s2mpa01)
		return -ENOMEM;

	rdata = s2mpa01->rdata;
	for (i = 0; i < S2MPA01_REGULATOR_CNT; i++)
		rdata[i].name = regulators[i].name;

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

		of_regulator_match(&pdev->dev, reg_np, rdata,
						S2MPA01_REGULATOR_MAX);
		of_node_put(reg_np);
	}

	platform_set_drvdata(pdev, s2mpa01);

	config.dev = &pdev->dev;
	config.regmap = iodev->regmap_pmic;
	config.driver_data = s2mpa01;

	for (i = 0; i < S2MPA01_REGULATOR_MAX; i++) {
		struct regulator_dev *rdev;
		if (pdata)
			config.init_data = pdata->regulators[i].initdata;
		else
			config.init_data = rdata[i].init_data;

		if (reg_np)
			config.of_node = rdata[i].of_node;

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

	return 0;
}

static const struct platform_device_id s2mpa01_pmic_id[] = {
	{ "s2mpa01-pmic", 0},
	{ },
};
MODULE_DEVICE_TABLE(platform, s2mpa01_pmic_id);

static struct platform_driver s2mpa01_pmic_driver = {
	.driver = {
		.name = "s2mpa01-pmic",
	},
	.probe = s2mpa01_pmic_probe,
	.id_table = s2mpa01_pmic_id,
};

module_platform_driver(s2mpa01_pmic_driver);

/* Module information */
MODULE_AUTHOR("Sangbeom Kim <sbkim73@samsung.com>");
MODULE_AUTHOR("Sachin Kamat <sachin.kamat@samsung.com>");
MODULE_DESCRIPTION("SAMSUNG S2MPA01 Regulator Driver");
MODULE_LICENSE("GPL");
Commit	Line	Data
f1879271 SK	1	/*
	2	* Copyright (c) 2013 Samsung Electronics Co., Ltd
	3	* http://www.samsung.com
	4	*
	5	* This program is free software; you can redistribute it and/or modify it
	6	* under the terms of the GNU General Public License as published by the
	7	* Free Software Foundation; either version 2 of the License, or (at your
	8	* option) any later version.
	9	*
	10	*/
	11
	12	#include <linux/bug.h>
	13	#include <linux/err.h>
	14	#include <linux/gpio.h>
	15	#include <linux/slab.h>
	16	#include <linux/module.h>
	17	#include <linux/of.h>
	18	#include <linux/regmap.h>
	19	#include <linux/platform_device.h>
	20	#include <linux/regulator/driver.h>
	21	#include <linux/regulator/machine.h>
	22	#include <linux/regulator/of_regulator.h>
	23	#include <linux/mfd/samsung/core.h>
	24	#include <linux/mfd/samsung/s2mpa01.h>
	25
	26	#define S2MPA01_REGULATOR_CNT ARRAY_SIZE(regulators)
	27
	28	struct s2mpa01_info {
33f0698a	29	struct of_regulator_match rdata[S2MPA01_REGULATOR_MAX];
f1879271 SK	30	int ramp_delay24;
	31	int ramp_delay3;
	32	int ramp_delay5;
	33	int ramp_delay16;
	34	int ramp_delay7;
	35	int ramp_delay8910;
	36	};
	37
	38	static int get_ramp_delay(int ramp_delay)
	39	{
	40	unsigned char cnt = 0;
	41
	42	ramp_delay /= 6250;
	43
	44	while (true) {
	45	ramp_delay = ramp_delay >> 1;
	46	if (ramp_delay == 0)
	47	break;
	48	cnt++;
	49	}
	50
	51	if (cnt > 3)
	52	cnt = 3;
	53
	54	return cnt;
	55	}
	56
	57	static int s2mpa01_regulator_set_voltage_time_sel(struct regulator_dev *rdev,
	58	unsigned int old_selector,
	59	unsigned int new_selector)
	60	{
	61	struct s2mpa01_info *s2mpa01 = rdev_get_drvdata(rdev);
	62	unsigned int ramp_delay = 0;
	63	int old_volt, new_volt;
	64
0608032a	65	switch (rdev_get_id(rdev)) {
f1879271 SK	66	case S2MPA01_BUCK2:
	67	case S2MPA01_BUCK4:
	68	ramp_delay = s2mpa01->ramp_delay24;
	69	break;
	70	case S2MPA01_BUCK3:
	71	ramp_delay = s2mpa01->ramp_delay3;
	72	break;
	73	case S2MPA01_BUCK5:
	74	ramp_delay = s2mpa01->ramp_delay5;
	75	break;
	76	case S2MPA01_BUCK1:
	77	case S2MPA01_BUCK6:
	78	ramp_delay = s2mpa01->ramp_delay16;
	79	break;
	80	case S2MPA01_BUCK7:
	81	ramp_delay = s2mpa01->ramp_delay7;
	82	break;
	83	case S2MPA01_BUCK8:
	84	case S2MPA01_BUCK9:
	85	case S2MPA01_BUCK10:
	86	ramp_delay = s2mpa01->ramp_delay8910;
	87	break;
	88	}
	89
	90	if (ramp_delay == 0)
	91	ramp_delay = rdev->desc->ramp_delay;
	92
	93	old_volt = rdev->desc->min_uV + (rdev->desc->uV_step * old_selector);
	94	new_volt = rdev->desc->min_uV + (rdev->desc->uV_step * new_selector);
	95
	96	return DIV_ROUND_UP(abs(new_volt - old_volt), ramp_delay);
	97	}
	98
	99	static int s2mpa01_set_ramp_delay(struct regulator_dev *rdev, int ramp_delay)
	100	{
	101	struct s2mpa01_info *s2mpa01 = rdev_get_drvdata(rdev);
	102	unsigned int ramp_val, ramp_shift, ramp_reg = S2MPA01_REG_RAMP2;
	103	unsigned int ramp_enable = 1, enable_shift = 0;
	104	int ret;
	105
0608032a	106	switch (rdev_get_id(rdev)) {
f1879271 SK	107	case S2MPA01_BUCK1:
	108	enable_shift = S2MPA01_BUCK1_RAMP_EN_SHIFT;
	109	if (!ramp_delay) {
	110	ramp_enable = 0;
	111	break;
	112	}
	113
	114	if (ramp_delay > s2mpa01->ramp_delay16)
	115	s2mpa01->ramp_delay16 = ramp_delay;
	116	else
	117	ramp_delay = s2mpa01->ramp_delay16;
	118
	119	ramp_shift = S2MPA01_BUCK16_RAMP_SHIFT;
f1879271 SK	120	break;
	121	case S2MPA01_BUCK2:
	122	enable_shift = S2MPA01_BUCK2_RAMP_EN_SHIFT;
	123	if (!ramp_delay) {
	124	ramp_enable = 0;
	125	break;
	126	}
	127
	128	if (ramp_delay > s2mpa01->ramp_delay24)
	129	s2mpa01->ramp_delay24 = ramp_delay;
	130	else
	131	ramp_delay = s2mpa01->ramp_delay24;
	132
	133	ramp_shift = S2MPA01_BUCK24_RAMP_SHIFT;
	134	ramp_reg = S2MPA01_REG_RAMP1;
	135	break;
	136	case S2MPA01_BUCK3:
	137	enable_shift = S2MPA01_BUCK3_RAMP_EN_SHIFT;
	138	if (!ramp_delay) {
	139	ramp_enable = 0;
	140	break;
	141	}
	142
	143	s2mpa01->ramp_delay3 = ramp_delay;
	144	ramp_shift = S2MPA01_BUCK3_RAMP_SHIFT;
	145	ramp_reg = S2MPA01_REG_RAMP1;
	146	break;
	147	case S2MPA01_BUCK4:
	148	enable_shift = S2MPA01_BUCK4_RAMP_EN_SHIFT;
	149	if (!ramp_delay) {
	150	ramp_enable = 0;
	151	break;
	152	}
	153
	154	if (ramp_delay > s2mpa01->ramp_delay24)
	155	s2mpa01->ramp_delay24 = ramp_delay;
	156	else
	157	ramp_delay = s2mpa01->ramp_delay24;
	158
	159	ramp_shift = S2MPA01_BUCK24_RAMP_SHIFT;
	160	ramp_reg = S2MPA01_REG_RAMP1;
	161	break;
	162	case S2MPA01_BUCK5:
	163	s2mpa01->ramp_delay5 = ramp_delay;
	164	ramp_shift = S2MPA01_BUCK5_RAMP_SHIFT;
	165	break;
	166	case S2MPA01_BUCK6:
	167	if (ramp_delay > s2mpa01->ramp_delay16)
	168	s2mpa01->ramp_delay16 = ramp_delay;
	169	else
	170	ramp_delay = s2mpa01->ramp_delay16;
	171
	172	ramp_shift = S2MPA01_BUCK16_RAMP_SHIFT;
	173	break;
	174	case S2MPA01_BUCK7:
	175	s2mpa01->ramp_delay7 = ramp_delay;
	176	ramp_shift = S2MPA01_BUCK7_RAMP_SHIFT;
	177	break;
	178	case S2MPA01_BUCK8:
	179	case S2MPA01_BUCK9:
	180	case S2MPA01_BUCK10:
	181	if (ramp_delay > s2mpa01->ramp_delay8910)
	182	s2mpa01->ramp_delay8910 = ramp_delay;
	183	else
184	ramp_delay = s2mpa01->ramp_delay8910;
185
186	ramp_shift = S2MPA01_BUCK8910_RAMP_SHIFT;
187	break;
188	default:
189	return 0;
190	}
191
192	if (!ramp_enable)
193	goto ramp_disable;
194
51e2fc0a KK	195	/* Ramp delay can be enabled/disabled only for buck[1234] */
	196	if (rdev_get_id(rdev) >= S2MPA01_BUCK1 &&
	197	rdev_get_id(rdev) <= S2MPA01_BUCK4) {
	198	ret = regmap_update_bits(rdev->regmap, S2MPA01_REG_RAMP1,
	199	1 << enable_shift, 1 << enable_shift);
	200	if (ret) {
	201	dev_err(&rdev->dev, "failed to enable ramp rate\n");
	202	return ret;
	203	}
f1879271 SK	204	}
	205
	206	ramp_val = get_ramp_delay(ramp_delay);
	207
	208	return regmap_update_bits(rdev->regmap, ramp_reg, 0x3 << ramp_shift,
	209	ramp_val << ramp_shift);
	210
	211	ramp_disable:
	212	return regmap_update_bits(rdev->regmap, S2MPA01_REG_RAMP1,
	213	1 << enable_shift, 0);
	214	}
	215
	216	static struct regulator_ops s2mpa01_ldo_ops = {
	217	.list_voltage = regulator_list_voltage_linear,
	218	.map_voltage = regulator_map_voltage_linear,
	219	.is_enabled = regulator_is_enabled_regmap,
	220	.enable = regulator_enable_regmap,
	221	.disable = regulator_disable_regmap,
	222	.get_voltage_sel = regulator_get_voltage_sel_regmap,
	223	.set_voltage_sel = regulator_set_voltage_sel_regmap,
	224	.set_voltage_time_sel = regulator_set_voltage_time_sel,
	225	};
	226
	227	static struct regulator_ops s2mpa01_buck_ops = {
	228	.list_voltage = regulator_list_voltage_linear,
	229	.map_voltage = regulator_map_voltage_linear,
	230	.is_enabled = regulator_is_enabled_regmap,
	231	.enable = regulator_enable_regmap,
	232	.disable = regulator_disable_regmap,
	233	.get_voltage_sel = regulator_get_voltage_sel_regmap,
	234	.set_voltage_sel = regulator_set_voltage_sel_regmap,
	235	.set_voltage_time_sel = s2mpa01_regulator_set_voltage_time_sel,
	236	.set_ramp_delay = s2mpa01_set_ramp_delay,
	237	};
	238
d264fd45	239	#define regulator_desc_ldo(num, step) { \
f1879271 SK	240	.name = "LDO"#num, \
	241	.id = S2MPA01_LDO##num, \
	242	.ops = &s2mpa01_ldo_ops, \
	243	.type = REGULATOR_VOLTAGE, \
	244	.owner = THIS_MODULE, \
0e4f4178	245	.min_uV = MIN_800_MV, \
d264fd45	246	.uV_step = step, \
f1879271 SK	247	.n_voltages = S2MPA01_LDO_N_VOLTAGES, \
	248	.vsel_reg = S2MPA01_REG_L1CTRL + num - 1, \
	249	.vsel_mask = S2MPA01_LDO_VSEL_MASK, \
	250	.enable_reg = S2MPA01_REG_L1CTRL + num - 1, \
	251	.enable_mask = S2MPA01_ENABLE_MASK \
	252	}
	253
	254	#define regulator_desc_buck1_4(num) { \
	255	.name = "BUCK"#num, \
	256	.id = S2MPA01_BUCK##num, \
	257	.ops = &s2mpa01_buck_ops, \
	258	.type = REGULATOR_VOLTAGE, \
	259	.owner = THIS_MODULE, \
0e4f4178 ADK	260	.min_uV = MIN_600_MV, \
0e4f4178 ADK	261	.uV_step = STEP_6_25_MV, \
f1879271 SK	262	.n_voltages = S2MPA01_BUCK_N_VOLTAGES, \
	263	.ramp_delay = S2MPA01_RAMP_DELAY, \
	264	.vsel_reg = S2MPA01_REG_B1CTRL2 + (num - 1) * 2, \
	265	.vsel_mask = S2MPA01_BUCK_VSEL_MASK, \
	266	.enable_reg = S2MPA01_REG_B1CTRL1 + (num - 1) * 2, \
	267	.enable_mask = S2MPA01_ENABLE_MASK \
	268	}
	269
	270	#define regulator_desc_buck5 { \
	271	.name = "BUCK5", \
	272	.id = S2MPA01_BUCK5, \
	273	.ops = &s2mpa01_buck_ops, \
	274	.type = REGULATOR_VOLTAGE, \
	275	.owner = THIS_MODULE, \
0e4f4178 ADK	276	.min_uV = MIN_800_MV, \
0e4f4178 ADK	277	.uV_step = STEP_6_25_MV, \
f1879271 SK	278	.n_voltages = S2MPA01_BUCK_N_VOLTAGES, \
	279	.ramp_delay = S2MPA01_RAMP_DELAY, \
	280	.vsel_reg = S2MPA01_REG_B5CTRL2, \
	281	.vsel_mask = S2MPA01_BUCK_VSEL_MASK, \
	282	.enable_reg = S2MPA01_REG_B5CTRL1, \
	283	.enable_mask = S2MPA01_ENABLE_MASK \
	284	}
	285
d264fd45	286	#define regulator_desc_buck6_10(num, min, step) { \
f1879271 SK	287	.name = "BUCK"#num, \
	288	.id = S2MPA01_BUCK##num, \
	289	.ops = &s2mpa01_buck_ops, \
	290	.type = REGULATOR_VOLTAGE, \
	291	.owner = THIS_MODULE, \
d264fd45 ADK	292	.min_uV = min, \
d264fd45 ADK	293	.uV_step = step, \
f1879271 SK	294	.n_voltages = S2MPA01_BUCK_N_VOLTAGES, \
	295	.ramp_delay = S2MPA01_RAMP_DELAY, \
	296	.vsel_reg = S2MPA01_REG_B6CTRL2 + (num - 6) * 2, \
	297	.vsel_mask = S2MPA01_BUCK_VSEL_MASK, \
	298	.enable_reg = S2MPA01_REG_B6CTRL1 + (num - 6) * 2, \
	299	.enable_mask = S2MPA01_ENABLE_MASK \
	300	}
	301
4b8e43f2	302	static const struct regulator_desc regulators[] = {
d264fd45 ADK	303	regulator_desc_ldo(1, STEP_25_MV),
	304	regulator_desc_ldo(2, STEP_50_MV),
	305	regulator_desc_ldo(3, STEP_50_MV),
	306	regulator_desc_ldo(4, STEP_50_MV),
	307	regulator_desc_ldo(5, STEP_50_MV),
	308	regulator_desc_ldo(6, STEP_25_MV),
	309	regulator_desc_ldo(7, STEP_50_MV),
	310	regulator_desc_ldo(8, STEP_50_MV),
	311	regulator_desc_ldo(9, STEP_50_MV),
	312	regulator_desc_ldo(10, STEP_50_MV),
	313	regulator_desc_ldo(11, STEP_25_MV),
	314	regulator_desc_ldo(12, STEP_50_MV),
	315	regulator_desc_ldo(13, STEP_50_MV),
	316	regulator_desc_ldo(14, STEP_50_MV),
	317	regulator_desc_ldo(15, STEP_50_MV),
	318	regulator_desc_ldo(16, STEP_50_MV),
	319	regulator_desc_ldo(17, STEP_50_MV),
	320	regulator_desc_ldo(18, STEP_50_MV),
	321	regulator_desc_ldo(19, STEP_50_MV),
	322	regulator_desc_ldo(20, STEP_50_MV),
	323	regulator_desc_ldo(21, STEP_50_MV),
	324	regulator_desc_ldo(22, STEP_25_MV),
	325	regulator_desc_ldo(23, STEP_25_MV),
	326	regulator_desc_ldo(24, STEP_50_MV),
	327	regulator_desc_ldo(25, STEP_50_MV),
	328	regulator_desc_ldo(26, STEP_50_MV),
f1879271 SK	329	regulator_desc_buck1_4(1),
	330	regulator_desc_buck1_4(2),
	331	regulator_desc_buck1_4(3),
	332	regulator_desc_buck1_4(4),
	333	regulator_desc_buck5,
d264fd45 ADK	334	regulator_desc_buck6_10(6, MIN_600_MV, STEP_6_25_MV),
	335	regulator_desc_buck6_10(7, MIN_600_MV, STEP_6_25_MV),
	336	regulator_desc_buck6_10(8, MIN_800_MV, STEP_12_5_MV),
	337	regulator_desc_buck6_10(9, MIN_1500_MV, STEP_12_5_MV),
	338	regulator_desc_buck6_10(10, MIN_1000_MV, STEP_12_5_MV),
f1879271 SK	339	};
	340
	341	static int s2mpa01_pmic_probe(struct platform_device *pdev)
	342	{
	343	struct sec_pmic_dev *iodev = dev_get_drvdata(pdev->dev.parent);
	344	struct sec_platform_data *pdata = dev_get_platdata(iodev->dev);
f1879271 SK	345	struct device_node *reg_np = NULL;
f1879271 SK	346	struct regulator_config config = { };
33f0698a	347	struct of_regulator_match *rdata;
f1879271 SK	348	struct s2mpa01_info *s2mpa01;
	349	int i;
	350
	351	s2mpa01 = devm_kzalloc(&pdev->dev, sizeof(*s2mpa01), GFP_KERNEL);
	352	if (!s2mpa01)
	353	return -ENOMEM;
	354
33f0698a	355	rdata = s2mpa01->rdata;
f1879271 SK	356	for (i = 0; i < S2MPA01_REGULATOR_CNT; i++)
	357	rdata[i].name = regulators[i].name;
	358
	359	if (iodev->dev->of_node) {
	360	reg_np = of_get_child_by_name(iodev->dev->of_node,
	361	"regulators");
	362	if (!reg_np) {
	363	dev_err(&pdev->dev,
	364	"could not find regulators sub-node\n");
	365	return -EINVAL;
	366	}
	367
	368	of_regulator_match(&pdev->dev, reg_np, rdata,
	369	S2MPA01_REGULATOR_MAX);
	370	of_node_put(reg_np);
	371	}
	372
	373	platform_set_drvdata(pdev, s2mpa01);
	374
	375	config.dev = &pdev->dev;
	376	config.regmap = iodev->regmap_pmic;
	377	config.driver_data = s2mpa01;
	378
	379	for (i = 0; i < S2MPA01_REGULATOR_MAX; i++) {
	380	struct regulator_dev *rdev;
	381	if (pdata)
	382	config.init_data = pdata->regulators[i].initdata;
	383	else
	384	config.init_data = rdata[i].init_data;
	385
	386	if (reg_np)
	387	config.of_node = rdata[i].of_node;
	388
	389	rdev = devm_regulator_register(&pdev->dev,
	390	&regulators[i], &config);
	391	if (IS_ERR(rdev)) {
	392	dev_err(&pdev->dev, "regulator init failed for %d\n",
	393	i);
	394	return PTR_ERR(rdev);
	395	}
	396	}
	397
	398	return 0;
	399	}
	400
	401	static const struct platform_device_id s2mpa01_pmic_id[] = {
	402	{ "s2mpa01-pmic", 0},
	403	{ },
	404	};
	405	MODULE_DEVICE_TABLE(platform, s2mpa01_pmic_id);
	406
	407	static struct platform_driver s2mpa01_pmic_driver = {
	408	.driver = {
	409	.name = "s2mpa01-pmic",
f1879271 SK	410	},
	411	.probe = s2mpa01_pmic_probe,
	412	.id_table = s2mpa01_pmic_id,
	413	};
	414
	415	module_platform_driver(s2mpa01_pmic_driver);
	416
	417	/* Module information */
	418	MODULE_AUTHOR("Sangbeom Kim <sbkim73@samsung.com>");
	419	MODULE_AUTHOR("Sachin Kamat <sachin.kamat@samsung.com>");
	420	MODULE_DESCRIPTION("SAMSUNG S2MPA01 Regulator Driver");
	421	MODULE_LICENSE("GPL");