[mirror_ubuntu-artful-kernel.git] / drivers / regulator / max77693.c

/*
 * max77693.c - Regulator driver for the Maxim 77693
 *
 * Copyright (C) 2013 Samsung Electronics
 * 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 max77686.c
 */

#include <linux/err.h>
#include <linux/slab.h>
#include <linux/platform_device.h>
#include <linux/module.h>
#include <linux/export.h>
#include <linux/regulator/driver.h>
#include <linux/regulator/machine.h>
#include <linux/mfd/max77693.h>
#include <linux/mfd/max77693-common.h>
#include <linux/mfd/max77693-private.h>
#include <linux/regulator/of_regulator.h>
#include <linux/regmap.h>

/* Charger regulator differences between MAX77693 and MAX77843 */
struct chg_reg_data {
	unsigned int linear_reg;
	unsigned int linear_mask;
	unsigned int uA_step;
	unsigned int min_sel;
};

/*
 * CHARGER regulator - Min : 20mA, Max : 2580mA, step : 20mA
 * 0x00, 0x01, 0x2, 0x03	= 60 mA
 * 0x04 ~ 0x7E			= (60 + (X - 3) * 20) mA
 */
static int max77693_chg_get_current_limit(struct regulator_dev *rdev)
{
	const struct chg_reg_data *reg_data = rdev_get_drvdata(rdev);
	unsigned int chg_min_uA = rdev->constraints->min_uA;
	unsigned int chg_max_uA = rdev->constraints->max_uA;
	unsigned int reg, sel;
	unsigned int val;
	int ret;

	ret = regmap_read(rdev->regmap, reg_data->linear_reg, &reg);
	if (ret < 0)
		return ret;

	sel = reg & reg_data->linear_mask;

	/* the first four codes for charger current are all 60mA */
	if (sel <= reg_data->min_sel)
		sel = 0;
	else
		sel -= reg_data->min_sel;

	val = chg_min_uA + reg_data->uA_step * sel;
	if (val > chg_max_uA)
		return -EINVAL;

	return val;
}

static int max77693_chg_set_current_limit(struct regulator_dev *rdev,
						int min_uA, int max_uA)
{
	const struct chg_reg_data *reg_data = rdev_get_drvdata(rdev);
	unsigned int chg_min_uA = rdev->constraints->min_uA;
	int sel = 0;

	while (chg_min_uA + reg_data->uA_step * sel < min_uA)
		sel++;

	if (chg_min_uA + reg_data->uA_step * sel > max_uA)
		return -EINVAL;

	/* the first four codes for charger current are all 60mA */
	sel += reg_data->min_sel;

	return regmap_write(rdev->regmap, reg_data->linear_reg, sel);
}
/* end of CHARGER regulator ops */

static const unsigned int max77693_safeout_table[] = {
	4850000,
	4900000,
	4950000,
	3300000,
};

static struct regulator_ops max77693_safeout_ops = {
	.list_voltage		= regulator_list_voltage_table,
	.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,
};

static struct regulator_ops max77693_charger_ops = {
	.is_enabled		= regulator_is_enabled_regmap,
	.enable			= regulator_enable_regmap,
	.disable		= regulator_disable_regmap,
	.get_current_limit	= max77693_chg_get_current_limit,
	.set_current_limit	= max77693_chg_set_current_limit,
};

#define regulator_desc_esafeout(_num)	{			\
	.name		= "ESAFEOUT"#_num,			\
	.id		= MAX77693_ESAFEOUT##_num,		\
	.of_match	= of_match_ptr("ESAFEOUT"#_num),	\
	.regulators_node	= of_match_ptr("regulators"),	\
	.n_voltages	= 4,					\
	.ops		= &max77693_safeout_ops,		\
	.type		= REGULATOR_VOLTAGE,			\
	.owner		= THIS_MODULE,				\
	.volt_table	= max77693_safeout_table,		\
	.vsel_reg	= MAX77693_CHG_REG_SAFEOUT_CTRL,	\
	.vsel_mask	= SAFEOUT_CTRL_SAFEOUT##_num##_MASK,	\
	.enable_reg	= MAX77693_CHG_REG_SAFEOUT_CTRL,	\
	.enable_mask	= SAFEOUT_CTRL_ENSAFEOUT##_num##_MASK ,	\
}

static const struct regulator_desc regulators[] = {
	regulator_desc_esafeout(1),
	regulator_desc_esafeout(2),
	{
		.name = "CHARGER",
		.id = MAX77693_CHARGER,
		.of_match = of_match_ptr("CHARGER"),
		.regulators_node = of_match_ptr("regulators"),
		.ops = &max77693_charger_ops,
		.type = REGULATOR_CURRENT,
		.owner = THIS_MODULE,
		.enable_reg = MAX77693_CHG_REG_CHG_CNFG_00,
		.enable_mask = CHG_CNFG_00_CHG_MASK |
				CHG_CNFG_00_BUCK_MASK,
		.enable_val = CHG_CNFG_00_CHG_MASK | CHG_CNFG_00_BUCK_MASK,
	},
};

static const struct chg_reg_data max77693_chg_reg_data = {
	.linear_reg	= MAX77693_CHG_REG_CHG_CNFG_09,
	.linear_mask	= CHG_CNFG_09_CHGIN_ILIM_MASK,
	.uA_step	= 20000,
	.min_sel	= 3,
};

static int max77693_pmic_probe(struct platform_device *pdev)
{
	struct max77693_dev *iodev = dev_get_drvdata(pdev->dev.parent);
	int i;
	struct regulator_config config = { };

	config.dev = iodev->dev;
	config.regmap = iodev->regmap;
	config.driver_data = (void *)&max77693_chg_reg_data;

	for (i = 0; i < ARRAY_SIZE(regulators); i++) {
		struct regulator_dev *rdev;

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

	return 0;
}

static const struct platform_device_id max77693_pmic_id[] = {
	{ "max77693-pmic", TYPE_MAX77693 },
	{},
};

MODULE_DEVICE_TABLE(platform, max77693_pmic_id);

static struct platform_driver max77693_pmic_driver = {
	.driver = {
		   .name = "max77693-pmic",
		   },
	.probe = max77693_pmic_probe,
	.id_table = max77693_pmic_id,
};

module_platform_driver(max77693_pmic_driver);

MODULE_DESCRIPTION("MAXIM MAX77693 regulator driver");
MODULE_AUTHOR("Jonghwa Lee <jonghwa3.lee@samsung.com>");
MODULE_LICENSE("GPL");
Commit	Line	Data
80b022e2 JL	1	/*
	2	* max77693.c - Regulator driver for the Maxim 77693
	3	*
	4	* Copyright (C) 2013 Samsung Electronics
	5	* Jonghwa Lee <jonghwa3.lee@samsung.com>
	6	*
	7	* This program is free software; you can redistribute it and/or modify
	8	* it under the terms of the GNU General Public License as published by
	9	* the Free Software Foundation; either version 2 of the License, or
	10	* (at your option) any later version.
	11	*
	12	* This program is distributed in the hope that it will be useful,
	13	* but WITHOUT ANY WARRANTY; without even the implied warranty of
	14	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
	15	* GNU General Public License for more details.
	16	*
	17	* You should have received a copy of the GNU General Public License
	18	* along with this program; if not, write to the Free Software
	19	* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
	20	*
	21	* This driver is based on max77686.c
	22	*/
	23
	24	#include <linux/err.h>
	25	#include <linux/slab.h>
	26	#include <linux/platform_device.h>
	27	#include <linux/module.h>
	28	#include <linux/export.h>
	29	#include <linux/regulator/driver.h>
	30	#include <linux/regulator/machine.h>
	31	#include <linux/mfd/max77693.h>
61b305cd	32	#include <linux/mfd/max77693-common.h>
80b022e2 JL	33	#include <linux/mfd/max77693-private.h>
80b022e2 JL	34	#include <linux/regulator/of_regulator.h>
d0540f91	35	#include <linux/regmap.h>
80b022e2	36
5b5e771f KK	37	/* Charger regulator differences between MAX77693 and MAX77843 */
	38	struct chg_reg_data {
	39	unsigned int linear_reg;
	40	unsigned int linear_mask;
	41	unsigned int uA_step;
	42	unsigned int min_sel;
	43	};
80b022e2	44
80b022e2 JL	45	/*
	46	* CHARGER regulator - Min : 20mA, Max : 2580mA, step : 20mA
	47	* 0x00, 0x01, 0x2, 0x03 = 60 mA
	48	* 0x04 ~ 0x7E = (60 + (X - 3) * 20) mA
	49	*/
	50	static int max77693_chg_get_current_limit(struct regulator_dev *rdev)
	51	{
5b5e771f	52	const struct chg_reg_data *reg_data = rdev_get_drvdata(rdev);
80b022e2 JL	53	unsigned int chg_min_uA = rdev->constraints->min_uA;
80b022e2 JL	54	unsigned int chg_max_uA = rdev->constraints->max_uA;
d0540f91	55	unsigned int reg, sel;
80b022e2 JL	56	unsigned int val;
	57	int ret;
	58
5b5e771f	59	ret = regmap_read(rdev->regmap, reg_data->linear_reg, &reg);
80b022e2 JL	60	if (ret < 0)
	61	return ret;
	62
5b5e771f	63	sel = reg & reg_data->linear_mask;
80b022e2 JL	64
80b022e2 JL	65	/* the first four codes for charger current are all 60mA */
5b5e771f	66	if (sel <= reg_data->min_sel)
80b022e2 JL	67	sel = 0;
80b022e2 JL	68	else
5b5e771f	69	sel -= reg_data->min_sel;
80b022e2	70
5b5e771f	71	val = chg_min_uA + reg_data->uA_step * sel;
80b022e2 JL	72	if (val > chg_max_uA)
	73	return -EINVAL;
	74
	75	return val;
	76	}
	77
	78	static int max77693_chg_set_current_limit(struct regulator_dev *rdev,
	79	int min_uA, int max_uA)
	80	{
5b5e771f	81	const struct chg_reg_data *reg_data = rdev_get_drvdata(rdev);
80b022e2 JL	82	unsigned int chg_min_uA = rdev->constraints->min_uA;
	83	int sel = 0;
	84
5b5e771f	85	while (chg_min_uA + reg_data->uA_step * sel < min_uA)
80b022e2 JL	86	sel++;
80b022e2 JL	87
5b5e771f	88	if (chg_min_uA + reg_data->uA_step * sel > max_uA)
80b022e2 JL	89	return -EINVAL;
	90
	91	/* the first four codes for charger current are all 60mA */
5b5e771f	92	sel += reg_data->min_sel;
80b022e2	93
5b5e771f	94	return regmap_write(rdev->regmap, reg_data->linear_reg, sel);
80b022e2 JL	95	}
	96	/* end of CHARGER regulator ops */
	97
	98	static const unsigned int max77693_safeout_table[] = {
	99	4850000,
	100	4900000,
	101	4950000,
	102	3300000,
	103	};
	104
	105	static struct regulator_ops max77693_safeout_ops = {
	106	.list_voltage = regulator_list_voltage_table,
	107	.is_enabled = regulator_is_enabled_regmap,
	108	.enable = regulator_enable_regmap,
	109	.disable = regulator_disable_regmap,
	110	.get_voltage_sel = regulator_get_voltage_sel_regmap,
	111	.set_voltage_sel = regulator_set_voltage_sel_regmap,
	112	};
	113
	114	static struct regulator_ops max77693_charger_ops = {
39d23308	115	.is_enabled = regulator_is_enabled_regmap,
80b022e2 JL	116	.enable = regulator_enable_regmap,
	117	.disable = regulator_disable_regmap,
	118	.get_current_limit = max77693_chg_get_current_limit,
	119	.set_current_limit = max77693_chg_set_current_limit,
	120	};
	121
	122	#define regulator_desc_esafeout(_num) { \
	123	.name = "ESAFEOUT"#_num, \
	124	.id = MAX77693_ESAFEOUT##_num, \
222d0f04 KK	125	.of_match = of_match_ptr("ESAFEOUT"#_num), \
222d0f04 KK	126	.regulators_node = of_match_ptr("regulators"), \
80b022e2 JL	127	.n_voltages = 4, \
	128	.ops = &max77693_safeout_ops, \
	129	.type = REGULATOR_VOLTAGE, \
52f48bf3	130	.owner = THIS_MODULE, \
80b022e2 JL	131	.volt_table = max77693_safeout_table, \
	132	.vsel_reg = MAX77693_CHG_REG_SAFEOUT_CTRL, \
	133	.vsel_mask = SAFEOUT_CTRL_SAFEOUT##_num##_MASK, \
	134	.enable_reg = MAX77693_CHG_REG_SAFEOUT_CTRL, \
	135	.enable_mask = SAFEOUT_CTRL_ENSAFEOUT##_num##_MASK , \
	136	}
	137
2515b24c	138	static const struct regulator_desc regulators[] = {
80b022e2 JL	139	regulator_desc_esafeout(1),
	140	regulator_desc_esafeout(2),
	141	{
	142	.name = "CHARGER",
	143	.id = MAX77693_CHARGER,
222d0f04 KK	144	.of_match = of_match_ptr("CHARGER"),
222d0f04 KK	145	.regulators_node = of_match_ptr("regulators"),
80b022e2 JL	146	.ops = &max77693_charger_ops,
	147	.type = REGULATOR_CURRENT,
	148	.owner = THIS_MODULE,
	149	.enable_reg = MAX77693_CHG_REG_CHG_CNFG_00,
	150	.enable_mask = CHG_CNFG_00_CHG_MASK \|
	151	CHG_CNFG_00_BUCK_MASK,
39d23308	152	.enable_val = CHG_CNFG_00_CHG_MASK \| CHG_CNFG_00_BUCK_MASK,
80b022e2 JL	153	},
	154	};
	155
5b5e771f KK	156	static const struct chg_reg_data max77693_chg_reg_data = {
	157	.linear_reg = MAX77693_CHG_REG_CHG_CNFG_09,
	158	.linear_mask = CHG_CNFG_09_CHGIN_ILIM_MASK,
	159	.uA_step = 20000,
	160	.min_sel = 3,
	161	};
	162
80b022e2 JL	163	static int max77693_pmic_probe(struct platform_device *pdev)
	164	{
	165	struct max77693_dev *iodev = dev_get_drvdata(pdev->dev.parent);
222d0f04	166	int i;
ca0c37a0	167	struct regulator_config config = { };
80b022e2	168
222d0f04	169	config.dev = iodev->dev;
80b022e2	170	config.regmap = iodev->regmap;
5b5e771f	171	config.driver_data = (void *)&max77693_chg_reg_data;
80b022e2	172
222d0f04	173	for (i = 0; i < ARRAY_SIZE(regulators); i++) {
640c24a7	174	struct regulator_dev *rdev;
80b022e2	175
640c24a7	176	rdev = devm_regulator_register(&pdev->dev,
222d0f04	177	&regulators[i], &config);
640c24a7 KK	178	if (IS_ERR(rdev)) {
640c24a7 KK	179	dev_err(&pdev->dev,
222d0f04	180	"Failed to initialize regulator-%d\n", i);
640c24a7	181	return PTR_ERR(rdev);
80b022e2 JL	182	}
	183	}
	184
80b022e2 JL	185	return 0;
	186	}
	187
	188	static const struct platform_device_id max77693_pmic_id[] = {
5b5e771f	189	{ "max77693-pmic", TYPE_MAX77693 },
80b022e2 JL	190	{},
	191	};
	192
	193	MODULE_DEVICE_TABLE(platform, max77693_pmic_id);
	194
	195	static struct platform_driver max77693_pmic_driver = {
	196	.driver = {
	197	.name = "max77693-pmic",
80b022e2 JL	198	},
80b022e2 JL	199	.probe = max77693_pmic_probe,
80b022e2 JL	200	.id_table = max77693_pmic_id,
	201	};
	202
	203	module_platform_driver(max77693_pmic_driver);
	204
	205	MODULE_DESCRIPTION("MAXIM MAX77693 regulator driver");
	206	MODULE_AUTHOR("Jonghwa Lee <jonghwa3.lee@samsung.com>");
	207	MODULE_LICENSE("GPL");