Unverified Commit 7b0518fb authored by Mårten Lindahl's avatar Mårten Lindahl Committed by Mark Brown
Browse files

regulator: Add support for TI TPS6287x regulators 



Add support for Texas Instruments TPS6287x, single-channel
synchronous step-down converters with four output voltage ranges.

Signed-off-by: default avatarMårten Lindahl <marten.lindahl@axis.com>
Link: https://lore.kernel.org/r/20230502-tps6287x-driver-v3-2-e25140a023f5@axis.com


Signed-off-by: default avatarMark Brown <broonie@kernel.org>
parent 034008dd

drivers/regulator/Kconfig

+11 −0
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@@ -1397,6 +1397,17 @@ config REGULATOR_TPS6286X 
	  high-frequency synchronous step-down converters with an I2C

	  interface.



config REGULATOR_TPS6287X

	tristate "TI TPS6287x Power Regulator"

	depends on I2C && OF

	select REGMAP_I2C

	help

	  This driver supports TPS6287x voltage regulator chips. These are

	  pin-to-pin high-frequency synchronous step-down dc-dc converters

	  with an I2C interface.



	  If built as a module it will be called tps6287x-regulator.



config REGULATOR_TPS65023

	tristate "TI TPS65023 Power regulators"

	depends on I2C

drivers/regulator/Makefile

+1 −0
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@@ -163,6 +163,7 @@ obj-$(CONFIG_REGULATOR_TI_ABB) += ti-abb-regulator.o 
obj-$(CONFIG_REGULATOR_TPS6105X) += tps6105x-regulator.o

obj-$(CONFIG_REGULATOR_TPS62360) += tps62360-regulator.o

obj-$(CONFIG_REGULATOR_TPS6286X) += tps6286x-regulator.o

obj-$(CONFIG_REGULATOR_TPS6287X) += tps6287x-regulator.o

obj-$(CONFIG_REGULATOR_TPS65023) += tps65023-regulator.o

obj-$(CONFIG_REGULATOR_TPS6507X) += tps6507x-regulator.o

obj-$(CONFIG_REGULATOR_TPS65086) += tps65086-regulator.o

drivers/regulator/tps6287x-regulator.c

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// SPDX-License-Identifier: GPL-2.0-only

/*

 * Copyright (C) 2023 Axis Communications AB

 *

 * Driver for Texas Instruments TPS6287x PMIC.

 * Datasheet: https://www.ti.com/lit/ds/symlink/tps62873.pdf

 */



#include <linux/err.h>

#include <linux/i2c.h>

#include <linux/module.h>

#include <linux/of_device.h>

#include <linux/regmap.h>

#include <linux/regulator/of_regulator.h>

#include <linux/regulator/machine.h>

#include <linux/regulator/driver.h>

#include <linux/bitfield.h>

#include <linux/linear_range.h>



#define TPS6287X_VSET		0x00

#define TPS6287X_CTRL1		0x01

#define TPS6287X_CTRL1_VRAMP	GENMASK(1, 0)

#define TPS6287X_CTRL1_FPWMEN	BIT(4)

#define TPS6287X_CTRL1_SWEN	BIT(5)

#define TPS6287X_CTRL2		0x02

#define TPS6287X_CTRL2_VRANGE	GENMASK(3, 2)

#define TPS6287X_CTRL3		0x03

#define TPS6287X_STATUS		0x04



static const struct regmap_config tps6287x_regmap_config = {

	.reg_bits = 8,

	.val_bits = 8,

	.max_register = TPS6287X_STATUS,

};



static const struct linear_range tps6287x_voltage_ranges[] = {

	LINEAR_RANGE(400000, 0, 0xFF, 1250),

	LINEAR_RANGE(400000, 0, 0xFF, 2500),

	LINEAR_RANGE(400000, 0, 0xFF, 5000),

	LINEAR_RANGE(800000, 0, 0xFF, 10000),

};



static const unsigned int tps6287x_voltage_range_sel[] = {

	0x0, 0x4, 0x8, 0xC

};



static const unsigned int tps6287x_ramp_table[] = {

	10000, 5000, 1250, 500

};



static int tps6287x_set_mode(struct regulator_dev *rdev, unsigned int mode)

{

	unsigned int val;



	switch (mode) {

	case REGULATOR_MODE_NORMAL:

		val = 0;

		break;

	case REGULATOR_MODE_FAST:

		val = TPS6287X_CTRL1_FPWMEN;

		break;

	default:

		return -EINVAL;

	}



	return regmap_update_bits(rdev->regmap, TPS6287X_CTRL1,

				  TPS6287X_CTRL1_FPWMEN, val);

}



static unsigned int tps6287x_get_mode(struct regulator_dev *rdev)

{

	unsigned int val;

	int ret;



	ret = regmap_read(rdev->regmap, TPS6287X_CTRL1, &val);

	if (ret < 0)

		return 0;



	return (val & TPS6287X_CTRL1_FPWMEN) ? REGULATOR_MODE_FAST :

	    REGULATOR_MODE_NORMAL;

}



static unsigned int tps6287x_of_map_mode(unsigned int mode)

{

	switch (mode) {

	case REGULATOR_MODE_NORMAL:

	case REGULATOR_MODE_FAST:

		return mode;

	default:

		return REGULATOR_MODE_INVALID;

	}

}



static const struct regulator_ops tps6287x_regulator_ops = {

	.enable = regulator_enable_regmap,

	.disable = regulator_disable_regmap,

	.set_mode = tps6287x_set_mode,

	.get_mode = tps6287x_get_mode,

	.is_enabled = regulator_is_enabled_regmap,

	.get_voltage_sel = regulator_get_voltage_sel_pickable_regmap,

	.set_voltage_sel = regulator_set_voltage_sel_pickable_regmap,

	.list_voltage = regulator_list_voltage_pickable_linear_range,

	.set_ramp_delay = regulator_set_ramp_delay_regmap,

};



static struct regulator_desc tps6287x_reg = {

	.name = "tps6287x",

	.owner = THIS_MODULE,

	.ops = &tps6287x_regulator_ops,

	.of_map_mode = tps6287x_of_map_mode,

	.type = REGULATOR_VOLTAGE,

	.enable_reg = TPS6287X_CTRL1,

	.enable_mask = TPS6287X_CTRL1_SWEN,

	.vsel_reg = TPS6287X_VSET,

	.vsel_mask = 0xFF,

	.vsel_range_reg = TPS6287X_CTRL2,

	.vsel_range_mask = TPS6287X_CTRL2_VRANGE,

	.ramp_reg = TPS6287X_CTRL1,

	.ramp_mask = TPS6287X_CTRL1_VRAMP,

	.ramp_delay_table = tps6287x_ramp_table,

	.n_ramp_values = ARRAY_SIZE(tps6287x_ramp_table),

	.linear_ranges = tps6287x_voltage_ranges,

	.n_linear_ranges = ARRAY_SIZE(tps6287x_voltage_ranges),

	.linear_range_selectors = tps6287x_voltage_range_sel,

};



static int tps6287x_i2c_probe(struct i2c_client *i2c)

{

	struct device *dev = &i2c->dev;

	struct regulator_config config = {};

	struct regulator_dev *rdev;



	config.regmap = devm_regmap_init_i2c(i2c, &tps6287x_regmap_config);

	if (IS_ERR(config.regmap)) {

		dev_err(dev, "Failed to init i2c\n");

		return PTR_ERR(config.regmap);

	}



	config.dev = dev;

	config.of_node = dev->of_node;

	config.init_data = of_get_regulator_init_data(dev, dev->of_node,

						      &tps6287x_reg);



	rdev = devm_regulator_register(dev, &tps6287x_reg, &config);

	if (IS_ERR(rdev)) {

		dev_err(dev, "Failed to register regulator\n");

		return PTR_ERR(rdev);

	}



	dev_dbg(dev, "Probed regulator\n");



	return 0;

}



static const struct of_device_id tps6287x_dt_ids[] = {

	{ .compatible = "ti,tps62870", },

	{ .compatible = "ti,tps62871", },

	{ .compatible = "ti,tps62872", },

	{ .compatible = "ti,tps62873", },

	{ }

};



MODULE_DEVICE_TABLE(of, tps6287x_dt_ids);



static const struct i2c_device_id tps6287x_i2c_id[] = {

	{ "tps62870", 0 },

	{ "tps62871", 0 },

	{ "tps62872", 0 },

	{ "tps62873", 0 },

	{},

};



MODULE_DEVICE_TABLE(i2c, tps6287x_i2c_id);



static struct i2c_driver tps6287x_regulator_driver = {

	.driver = {

		.name = "tps6287x",

		.of_match_table = tps6287x_dt_ids,

	},

	.probe_new = tps6287x_i2c_probe,

	.id_table = tps6287x_i2c_id,

};



module_i2c_driver(tps6287x_regulator_driver);



MODULE_AUTHOR("Mårten Lindahl <marten.lindahl@axis.com>");

MODULE_DESCRIPTION("Regulator driver for TI TPS6287X PMIC");

MODULE_LICENSE("GPL");