[linux-block.git] / drivers / regulator / rc5t583-regulator.c

// SPDX-License-Identifier: GPL-2.0-only
/*
 * Regulator driver for RICOH RC5T583 power management chip.
 *
 * Copyright (c) 2011-2012, NVIDIA CORPORATION.  All rights reserved.
 * Author: Laxman dewangan <ldewangan@nvidia.com>
 *
 * based on code
 *      Copyright (C) 2011 RICOH COMPANY,LTD
 */

#include <linux/module.h>
#include <linux/init.h>
#include <linux/slab.h>
#include <linux/err.h>
#include <linux/platform_device.h>
#include <linux/regulator/driver.h>
#include <linux/regulator/machine.h>
#include <linux/mfd/rc5t583.h>

struct rc5t583_regulator_info {
	int			deepsleep_id;

	/* Regulator register address.*/
	uint8_t			reg_disc_reg;
	uint8_t			disc_bit;
	uint8_t			deepsleep_reg;

	/* Regulator specific turn-on delay  and voltage settling time*/
	int			enable_uv_per_us;

	/* Used by regulator core */
	struct regulator_desc	desc;
};

static int rc5t583_regulator_enable_time(struct regulator_dev *rdev)
{
	struct rc5t583_regulator_info *reg_info = rdev_get_drvdata(rdev);
	int vsel = regulator_get_voltage_sel_regmap(rdev);
	int curr_uV = regulator_list_voltage_linear(rdev, vsel);

	return DIV_ROUND_UP(curr_uV, reg_info->enable_uv_per_us);
}

static const struct regulator_ops rc5t583_ops = {
	.is_enabled		= regulator_is_enabled_regmap,
	.enable			= regulator_enable_regmap,
	.disable		= regulator_disable_regmap,
	.enable_time		= rc5t583_regulator_enable_time,
	.get_voltage_sel	= regulator_get_voltage_sel_regmap,
	.set_voltage_sel	= regulator_set_voltage_sel_regmap,
	.list_voltage		= regulator_list_voltage_linear,
	.map_voltage		= regulator_map_voltage_linear,
	.set_voltage_time_sel	= regulator_set_voltage_time_sel,
};

#define RC5T583_REG(_id, _en_reg, _en_bit, _disc_reg, _disc_bit, \
		_vout_mask, _min_mv, _max_mv, _step_uV, _enable_mv) \
{								\
	.reg_disc_reg	= RC5T583_REG_##_disc_reg,		\
	.disc_bit	= _disc_bit,				\
	.deepsleep_reg	= RC5T583_REG_##_id##DAC_DS,		\
	.enable_uv_per_us = _enable_mv * 1000,			\
	.deepsleep_id	= RC5T583_DS_##_id,			\
	.desc = {						\
		.name = "rc5t583-regulator-"#_id,		\
		.id = RC5T583_REGULATOR_##_id,			\
		.n_voltages = (_max_mv - _min_mv) * 1000 / _step_uV + 1, \
		.ops = &rc5t583_ops,				\
		.type = REGULATOR_VOLTAGE,			\
		.owner = THIS_MODULE,				\
		.vsel_reg = RC5T583_REG_##_id##DAC,		\
		.vsel_mask = _vout_mask,			\
		.enable_reg = RC5T583_REG_##_en_reg,		\
		.enable_mask = BIT(_en_bit),			\
		.min_uV	= _min_mv * 1000,			\
		.uV_step = _step_uV,				\
		.ramp_delay = 40 * 1000,			\
	},							\
}

static struct rc5t583_regulator_info rc5t583_reg_info[RC5T583_REGULATOR_MAX] = {
	RC5T583_REG(DC0, DC0CTL, 0, DC0CTL, 1, 0x7F, 700, 1500, 12500, 4),
	RC5T583_REG(DC1, DC1CTL, 0, DC1CTL, 1, 0x7F, 700, 1500, 12500, 14),
	RC5T583_REG(DC2, DC2CTL, 0, DC2CTL, 1, 0x7F, 900, 2400, 12500, 14),
	RC5T583_REG(DC3, DC3CTL, 0, DC3CTL, 1, 0x7F, 900, 2400, 12500, 14),
	RC5T583_REG(LDO0, LDOEN2, 0, LDODIS2, 0, 0x7F, 900, 3400, 25000, 160),
	RC5T583_REG(LDO1, LDOEN2, 1, LDODIS2, 1, 0x7F, 900, 3400, 25000, 160),
	RC5T583_REG(LDO2, LDOEN2, 2, LDODIS2, 2, 0x7F, 900, 3400, 25000, 160),
	RC5T583_REG(LDO3, LDOEN2, 3, LDODIS2, 3, 0x7F, 900, 3400, 25000, 160),
	RC5T583_REG(LDO4, LDOEN2, 4, LDODIS2, 4, 0x3F, 750, 1500, 12500, 133),
	RC5T583_REG(LDO5, LDOEN2, 5, LDODIS2, 5, 0x7F, 900, 3400, 25000, 267),
	RC5T583_REG(LDO6, LDOEN2, 6, LDODIS2, 6, 0x7F, 900, 3400, 25000, 133),
	RC5T583_REG(LDO7, LDOEN2, 7, LDODIS2, 7, 0x7F, 900, 3400, 25000, 233),
	RC5T583_REG(LDO8, LDOEN1, 0, LDODIS1, 0, 0x7F, 900, 3400, 25000, 233),
	RC5T583_REG(LDO9, LDOEN1, 1, LDODIS1, 1, 0x7F, 900, 3400, 25000, 133),
};

static int rc5t583_regulator_probe(struct platform_device *pdev)
{
	struct rc5t583 *rc5t583 = dev_get_drvdata(pdev->dev.parent);
	struct rc5t583_platform_data *pdata = dev_get_platdata(rc5t583->dev);
	struct regulator_config config = { };
	struct regulator_dev *rdev;
	struct rc5t583_regulator_info *ri;
	int ret;
	int id;

	if (!pdata) {
		dev_err(&pdev->dev, "No platform data, exiting...\n");
		return -ENODEV;
	}

	for (id = 0; id < RC5T583_REGULATOR_MAX; ++id) {
		ri = &rc5t583_reg_info[id];

		if (ri->deepsleep_id == RC5T583_DS_NONE)
			goto skip_ext_pwr_config;

		ret = rc5t583_ext_power_req_config(rc5t583->dev,
				ri->deepsleep_id,
				pdata->regulator_ext_pwr_control[id],
				pdata->regulator_deepsleep_slot[id]);
		/*
		 * Configuring external control is not a major issue,
		 * just give warning.
		 */
		if (ret < 0)
			dev_warn(&pdev->dev,
				"Failed to configure ext control %d\n", id);

skip_ext_pwr_config:
		config.dev = &pdev->dev;
		config.init_data = pdata->reg_init_data[id];
		config.driver_data = ri;
		config.regmap = rc5t583->regmap;

		rdev = devm_regulator_register(&pdev->dev, &ri->desc, &config);
		if (IS_ERR(rdev)) {
			dev_err(&pdev->dev, "Failed to register regulator %s\n",
						ri->desc.name);
			return PTR_ERR(rdev);
		}
	}
	return 0;
}

static struct platform_driver rc5t583_regulator_driver = {
	.driver	= {
		.name	= "rc5t583-regulator",
		.probe_type = PROBE_PREFER_ASYNCHRONOUS,
	},
	.probe		= rc5t583_regulator_probe,
};

static int __init rc5t583_regulator_init(void)
{
	return platform_driver_register(&rc5t583_regulator_driver);
}
subsys_initcall(rc5t583_regulator_init);

static void __exit rc5t583_regulator_exit(void)
{
	platform_driver_unregister(&rc5t583_regulator_driver);
}
module_exit(rc5t583_regulator_exit);

MODULE_AUTHOR("Laxman Dewangan <ldewangan@nvidia.com>");
MODULE_DESCRIPTION("RC5T583 regulator driver");
MODULE_ALIAS("platform:rc5t583-regulator");
MODULE_LICENSE("GPL v2");
Commit	Line	Data
9952f691	1	// SPDX-License-Identifier: GPL-2.0-only
6ffc3270 LD	2	/*
	3	* Regulator driver for RICOH RC5T583 power management chip.
	4	*
	5	* Copyright (c) 2011-2012, NVIDIA CORPORATION. All rights reserved.
	6	* Author: Laxman dewangan <ldewangan@nvidia.com>
	7	*
	8	* based on code
	9	* Copyright (C) 2011 RICOH COMPANY,LTD
6ffc3270 LD	10	*/
	11
	12	#include <linux/module.h>
6ffc3270 LD	13	#include <linux/init.h>
	14	#include <linux/slab.h>
	15	#include <linux/err.h>
	16	#include <linux/platform_device.h>
	17	#include <linux/regulator/driver.h>
	18	#include <linux/regulator/machine.h>
6ffc3270 LD	19	#include <linux/mfd/rc5t583.h>
	20
	21	struct rc5t583_regulator_info {
	22	int deepsleep_id;
	23
	24	/* Regulator register address.*/
6ffc3270 LD	25	uint8_t reg_disc_reg;
6ffc3270 LD	26	uint8_t disc_bit;
6ffc3270 LD	27	uint8_t deepsleep_reg;
6ffc3270 LD	28
6ffc3270 LD	29	/* Regulator specific turn-on delay and voltage settling time*/
6ffc3270 LD	30	int enable_uv_per_us;
6ffc3270 LD	31
	32	/* Used by regulator core */
	33	struct regulator_desc desc;
	34	};
	35
6ffc3270 LD	36	static int rc5t583_regulator_enable_time(struct regulator_dev *rdev)
6ffc3270 LD	37	{
c07608f7	38	struct rc5t583_regulator_info *reg_info = rdev_get_drvdata(rdev);
15b397d7	39	int vsel = regulator_get_voltage_sel_regmap(rdev);
3209be17	40	int curr_uV = regulator_list_voltage_linear(rdev, vsel);
15b397d7	41
c07608f7	42	return DIV_ROUND_UP(curr_uV, reg_info->enable_uv_per_us);
6ffc3270 LD	43	}
6ffc3270 LD	44
fb74036b	45	static const struct regulator_ops rc5t583_ops = {
5bb6936c AL	46	.is_enabled = regulator_is_enabled_regmap,
	47	.enable = regulator_enable_regmap,
	48	.disable = regulator_disable_regmap,
6ffc3270	49	.enable_time = rc5t583_regulator_enable_time,
15b397d7	50	.get_voltage_sel = regulator_get_voltage_sel_regmap,
70e5f645	51	.set_voltage_sel = regulator_set_voltage_sel_regmap,
3209be17	52	.list_voltage = regulator_list_voltage_linear,
70e5f645	53	.map_voltage = regulator_map_voltage_linear,
2f6ae6ef	54	.set_voltage_time_sel = regulator_set_voltage_time_sel,
6ffc3270 LD	55	};
6ffc3270 LD	56
95e301ba AL	57	#define RC5T583_REG(_id, _en_reg, _en_bit, _disc_reg, _disc_bit, \
95e301ba AL	58	_vout_mask, _min_mv, _max_mv, _step_uV, _enable_mv) \
6ffc3270	59	{ \
6ffc3270 LD	60	.reg_disc_reg = RC5T583_REG_##_disc_reg, \
6ffc3270 LD	61	.disc_bit = _disc_bit, \
95e301ba	62	.deepsleep_reg = RC5T583_REG_##_id##DAC_DS, \
6ffc3270	63	.enable_uv_per_us = _enable_mv * 1000, \
6ffc3270 LD	64	.deepsleep_id = RC5T583_DS_##_id, \
	65	.desc = { \
	66	.name = "rc5t583-regulator-"#_id, \
	67	.id = RC5T583_REGULATOR_##_id, \
e3a7384c	68	.n_voltages = (_max_mv - _min_mv) * 1000 / _step_uV + 1, \
6ffc3270 LD	69	.ops = &rc5t583_ops, \
	70	.type = REGULATOR_VOLTAGE, \
	71	.owner = THIS_MODULE, \
15b397d7 AL	72	.vsel_reg = RC5T583_REG_##_id##DAC, \
15b397d7 AL	73	.vsel_mask = _vout_mask, \
5bb6936c AL	74	.enable_reg = RC5T583_REG_##_en_reg, \
5bb6936c AL	75	.enable_mask = BIT(_en_bit), \
3209be17 AL	76	.min_uV = _min_mv * 1000, \
3209be17 AL	77	.uV_step = _step_uV, \
2f6ae6ef	78	.ramp_delay = 40 * 1000, \
6ffc3270 LD	79	}, \
	80	}
	81
	82	static struct rc5t583_regulator_info rc5t583_reg_info[RC5T583_REGULATOR_MAX] = {
95e301ba AL	83	RC5T583_REG(DC0, DC0CTL, 0, DC0CTL, 1, 0x7F, 700, 1500, 12500, 4),
	84	RC5T583_REG(DC1, DC1CTL, 0, DC1CTL, 1, 0x7F, 700, 1500, 12500, 14),
	85	RC5T583_REG(DC2, DC2CTL, 0, DC2CTL, 1, 0x7F, 900, 2400, 12500, 14),
	86	RC5T583_REG(DC3, DC3CTL, 0, DC3CTL, 1, 0x7F, 900, 2400, 12500, 14),
	87	RC5T583_REG(LDO0, LDOEN2, 0, LDODIS2, 0, 0x7F, 900, 3400, 25000, 160),
	88	RC5T583_REG(LDO1, LDOEN2, 1, LDODIS2, 1, 0x7F, 900, 3400, 25000, 160),
	89	RC5T583_REG(LDO2, LDOEN2, 2, LDODIS2, 2, 0x7F, 900, 3400, 25000, 160),
	90	RC5T583_REG(LDO3, LDOEN2, 3, LDODIS2, 3, 0x7F, 900, 3400, 25000, 160),
	91	RC5T583_REG(LDO4, LDOEN2, 4, LDODIS2, 4, 0x3F, 750, 1500, 12500, 133),
	92	RC5T583_REG(LDO5, LDOEN2, 5, LDODIS2, 5, 0x7F, 900, 3400, 25000, 267),
	93	RC5T583_REG(LDO6, LDOEN2, 6, LDODIS2, 6, 0x7F, 900, 3400, 25000, 133),
	94	RC5T583_REG(LDO7, LDOEN2, 7, LDODIS2, 7, 0x7F, 900, 3400, 25000, 233),
	95	RC5T583_REG(LDO8, LDOEN1, 0, LDODIS1, 0, 0x7F, 900, 3400, 25000, 233),
	96	RC5T583_REG(LDO9, LDOEN1, 1, LDODIS1, 1, 0x7F, 900, 3400, 25000, 133),
6ffc3270 LD	97	};
6ffc3270 LD	98
a5023574	99	static int rc5t583_regulator_probe(struct platform_device *pdev)
6ffc3270 LD	100	{
	101	struct rc5t583 *rc5t583 = dev_get_drvdata(pdev->dev.parent);
	102	struct rc5t583_platform_data *pdata = dev_get_platdata(rc5t583->dev);
c172708d	103	struct regulator_config config = { };
6ffc3270 LD	104	struct regulator_dev *rdev;
	105	struct rc5t583_regulator_info *ri;
	106	int ret;
	107	int id;
	108
	109	if (!pdata) {
	110	dev_err(&pdev->dev, "No platform data, exiting...\n");
	111	return -ENODEV;
	112	}
	113
6ffc3270	114	for (id = 0; id < RC5T583_REGULATOR_MAX; ++id) {
6ffc3270	115	ri = &rc5t583_reg_info[id];
6ffc3270 LD	116
	117	if (ri->deepsleep_id == RC5T583_DS_NONE)
	118	goto skip_ext_pwr_config;
	119
	120	ret = rc5t583_ext_power_req_config(rc5t583->dev,
	121	ri->deepsleep_id,
	122	pdata->regulator_ext_pwr_control[id],
	123	pdata->regulator_deepsleep_slot[id]);
	124	/*
	125	* Configuring external control is not a major issue,
	126	* just give warning.
	127	*/
	128	if (ret < 0)
	129	dev_warn(&pdev->dev,
	130	"Failed to configure ext control %d\n", id);
	131
	132	skip_ext_pwr_config:
c172708d	133	config.dev = &pdev->dev;
3f24bf70	134	config.init_data = pdata->reg_init_data[id];
c07608f7	135	config.driver_data = ri;
5bb6936c	136	config.regmap = rc5t583->regmap;
c172708d	137
13775309	138	rdev = devm_regulator_register(&pdev->dev, &ri->desc, &config);
a69df8a1	139	if (IS_ERR(rdev)) {
6ffc3270 LD	140	dev_err(&pdev->dev, "Failed to register regulator %s\n",
6ffc3270 LD	141	ri->desc.name);
13775309	142	return PTR_ERR(rdev);
6ffc3270	143	}
6ffc3270	144	}
6ffc3270	145	return 0;
6ffc3270 LD	146	}
	147
	148	static struct platform_driver rc5t583_regulator_driver = {
	149	.driver = {
	150	.name = "rc5t583-regulator",
259b93b2	151	.probe_type = PROBE_PREFER_ASYNCHRONOUS,
6ffc3270 LD	152	},
6ffc3270 LD	153	.probe = rc5t583_regulator_probe,
6ffc3270 LD	154	};
	155
	156	static int __init rc5t583_regulator_init(void)
	157	{
	158	return platform_driver_register(&rc5t583_regulator_driver);
	159	}
	160	subsys_initcall(rc5t583_regulator_init);
	161
	162	static void __exit rc5t583_regulator_exit(void)
	163	{
	164	platform_driver_unregister(&rc5t583_regulator_driver);
	165	}
	166	module_exit(rc5t583_regulator_exit);
	167
	168	MODULE_AUTHOR("Laxman Dewangan <ldewangan@nvidia.com>");
	169	MODULE_DESCRIPTION("RC5T583 regulator driver");
	170	MODULE_ALIAS("platform:rc5t583-regulator");
4eb06453	171	MODULE_LICENSE("GPL v2");