[mirror_ubuntu-jammy-kernel.git] / drivers / regulator / da9121-regulator.c

// SPDX-License-Identifier: GPL-2.0-only
/* Copyright (C) 2020 Axis Communications AB */

#include <linux/of_device.h>
#include <linux/regulator/of_regulator.h>
#include <linux/regulator/machine.h>
#include <linux/regulator/driver.h>
#include <linux/module.h>
#include <linux/regmap.h>
#include <linux/err.h>
#include <linux/i2c.h>
#include "da9121-regulator.h"

#define DA9121_MIN_MV		300
#define DA9121_MAX_MV		1900
#define DA9121_STEP_MV		10
#define DA9121_MIN_SEL		(DA9121_MIN_MV / DA9121_STEP_MV)
#define DA9121_N_VOLTAGES	(((DA9121_MAX_MV - DA9121_MIN_MV) / DA9121_STEP_MV) \
				 + 1 + DA9121_MIN_SEL)

static const struct regmap_config da9121_regmap_config = {
	.reg_bits = 8,
	.val_bits = 8,
};

static const struct regulator_ops da9121_buck_ops = {
	.enable = regulator_enable_regmap,
	.disable = regulator_disable_regmap,
	.is_enabled = regulator_is_enabled_regmap,
	.set_voltage_sel = regulator_set_voltage_sel_regmap,
	.get_voltage_sel = regulator_get_voltage_sel_regmap,
	.list_voltage = regulator_list_voltage_linear,
};

static const struct regulator_desc da9121_reg = {
	.name = "da9121",
	.of_match = "buck1",
	.owner = THIS_MODULE,
	.ops = &da9121_buck_ops,
	.type = REGULATOR_VOLTAGE,
	.n_voltages = DA9121_N_VOLTAGES,
	.min_uV = DA9121_MIN_MV * 1000,
	.uV_step = DA9121_STEP_MV * 1000,
	.linear_min_sel = DA9121_MIN_SEL,
	.vsel_reg = DA9121_REG_BUCK_BUCK1_5,
	.vsel_mask = DA9121_MASK_BUCK_BUCKx_5_CHx_A_VOUT,
	.enable_reg = DA9121_REG_BUCK_BUCK1_0,
	.enable_mask = DA9121_MASK_BUCK_BUCKx_0_CHx_EN,
	/* Default value of BUCK_BUCK1_0.CH1_SRC_DVC_UP */
	.ramp_delay = 20000,
	/* tBUCK_EN */
	.enable_time = 20,
};

static const struct of_device_id da9121_dt_ids[] = {
	{ .compatible = "dlg,da9121", },
	{ }
};
MODULE_DEVICE_TABLE(of, da9121_dt_ids);

static int da9121_i2c_probe(struct i2c_client *i2c,
			    const struct i2c_device_id *id)
{
	struct device *dev = &i2c->dev;
	struct regulator_config config = {};
	struct regulator_dev *rdev;
	struct regmap *regmap;

	regmap = devm_regmap_init_i2c(i2c, &da9121_regmap_config);
	if (IS_ERR(regmap))
		return PTR_ERR(regmap);

	config.dev = &i2c->dev;
	config.of_node = dev->of_node;
	config.regmap = regmap;

	rdev = devm_regulator_register(&i2c->dev, &da9121_reg, &config);
	if (IS_ERR(rdev)) {
		dev_err(&i2c->dev, "Failed to register da9121 regulator\n");
		return PTR_ERR(rdev);
	}

	return 0;
}

static const struct i2c_device_id da9121_i2c_id[] = {
	{ "da9121", 0 },
	{},
};
MODULE_DEVICE_TABLE(i2c, da9121_i2c_id);

static struct i2c_driver da9121_regulator_driver = {
	.driver = {
		.name = "da9121",
		.of_match_table = of_match_ptr(da9121_dt_ids),
	},
	.probe = da9121_i2c_probe,
	.id_table = da9121_i2c_id,
};

module_i2c_driver(da9121_regulator_driver);

MODULE_LICENSE("GPL v2");
Commit	Line	Data
e6ff10f2 VW	1	// SPDX-License-Identifier: GPL-2.0-only
	2	/* Copyright (C) 2020 Axis Communications AB */
	3
	4	#include <linux/of_device.h>
	5	#include <linux/regulator/of_regulator.h>
	6	#include <linux/regulator/machine.h>
	7	#include <linux/regulator/driver.h>
	8	#include <linux/module.h>
	9	#include <linux/regmap.h>
	10	#include <linux/err.h>
	11	#include <linux/i2c.h>
86f162c9	12	#include "da9121-regulator.h"
e6ff10f2 VW	13
	14	#define DA9121_MIN_MV 300
	15	#define DA9121_MAX_MV 1900
	16	#define DA9121_STEP_MV 10
	17	#define DA9121_MIN_SEL (DA9121_MIN_MV / DA9121_STEP_MV)
	18	#define DA9121_N_VOLTAGES (((DA9121_MAX_MV - DA9121_MIN_MV) / DA9121_STEP_MV) \
	19	+ 1 + DA9121_MIN_SEL)
	20
	21	static const struct regmap_config da9121_regmap_config = {
	22	.reg_bits = 8,
	23	.val_bits = 8,
	24	};
	25
	26	static const struct regulator_ops da9121_buck_ops = {
	27	.enable = regulator_enable_regmap,
	28	.disable = regulator_disable_regmap,
	29	.is_enabled = regulator_is_enabled_regmap,
	30	.set_voltage_sel = regulator_set_voltage_sel_regmap,
	31	.get_voltage_sel = regulator_get_voltage_sel_regmap,
	32	.list_voltage = regulator_list_voltage_linear,
	33	};
	34
	35	static const struct regulator_desc da9121_reg = {
	36	.name = "da9121",
	37	.of_match = "buck1",
	38	.owner = THIS_MODULE,
	39	.ops = &da9121_buck_ops,
	40	.type = REGULATOR_VOLTAGE,
	41	.n_voltages = DA9121_N_VOLTAGES,
	42	.min_uV = DA9121_MIN_MV * 1000,
	43	.uV_step = DA9121_STEP_MV * 1000,
	44	.linear_min_sel = DA9121_MIN_SEL,
86f162c9 AW	45	.vsel_reg = DA9121_REG_BUCK_BUCK1_5,
	46	.vsel_mask = DA9121_MASK_BUCK_BUCKx_5_CHx_A_VOUT,
	47	.enable_reg = DA9121_REG_BUCK_BUCK1_0,
	48	.enable_mask = DA9121_MASK_BUCK_BUCKx_0_CHx_EN,
e6ff10f2 VW	49	/* Default value of BUCK_BUCK1_0.CH1_SRC_DVC_UP */
	50	.ramp_delay = 20000,
	51	/* tBUCK_EN */
	52	.enable_time = 20,
	53	};
	54
	55	static const struct of_device_id da9121_dt_ids[] = {
	56	{ .compatible = "dlg,da9121", },
	57	{ }
	58	};
	59	MODULE_DEVICE_TABLE(of, da9121_dt_ids);
	60
	61	static int da9121_i2c_probe(struct i2c_client *i2c,
	62	const struct i2c_device_id *id)
	63	{
	64	struct device *dev = &i2c->dev;
	65	struct regulator_config config = {};
	66	struct regulator_dev *rdev;
	67	struct regmap *regmap;
	68
	69	regmap = devm_regmap_init_i2c(i2c, &da9121_regmap_config);
	70	if (IS_ERR(regmap))
	71	return PTR_ERR(regmap);
	72
	73	config.dev = &i2c->dev;
	74	config.of_node = dev->of_node;
	75	config.regmap = regmap;
	76
	77	rdev = devm_regulator_register(&i2c->dev, &da9121_reg, &config);
	78	if (IS_ERR(rdev)) {
	79	dev_err(&i2c->dev, "Failed to register da9121 regulator\n");
	80	return PTR_ERR(rdev);
	81	}
	82
	83	return 0;
	84	}
	85
	86	static const struct i2c_device_id da9121_i2c_id[] = {
	87	{ "da9121", 0 },
	88	{},
	89	};
	90	MODULE_DEVICE_TABLE(i2c, da9121_i2c_id);
	91
	92	static struct i2c_driver da9121_regulator_driver = {
	93	.driver = {
	94	.name = "da9121",
	95	.of_match_table = of_match_ptr(da9121_dt_ids),
	96	},
	97	.probe = da9121_i2c_probe,
	98	.id_table = da9121_i2c_id,
	99	};
	100
	101	module_i2c_driver(da9121_regulator_driver);
	102
	103	MODULE_LICENSE("GPL v2");