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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: Mårten Lindahl <marten.lindahl@axis.com Link: https://lore.kernel.org/r/20230502-tps6287x-driver-v3-2-e25140a023f5@axis.com Signed-off-by: Mark Brown <broonie@kernel.org
1 parent 034008d commit 7b0518f

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‎drivers/regulator/Kconfig‎

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@@ -1397,6 +1397,17 @@ config REGULATOR_TPS6286X
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high-frequency synchronous step-down converters with an I2C
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interface.
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config REGULATOR_TPS6287X
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tristate "TI TPS6287x Power Regulator"
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depends on I2C && OF
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select REGMAP_I2C
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help
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This driver supports TPS6287x voltage regulator chips. These are
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pin-to-pin high-frequency synchronous step-down dc-dc converters
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with an I2C interface.
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If built as a module it will be called tps6287x-regulator.
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config REGULATOR_TPS65023
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tristate "TI TPS65023 Power regulators"
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depends on I2C

‎drivers/regulator/Makefile‎

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@@ -163,6 +163,7 @@ obj-$(CONFIG_REGULATOR_TI_ABB) += ti-abb-regulator.o
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obj-$(CONFIG_REGULATOR_TPS6105X) += tps6105x-regulator.o
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obj-$(CONFIG_REGULATOR_TPS62360) += tps62360-regulator.o
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obj-$(CONFIG_REGULATOR_TPS6286X) += tps6286x-regulator.o
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obj-$(CONFIG_REGULATOR_TPS6287X) += tps6287x-regulator.o
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obj-$(CONFIG_REGULATOR_TPS65023) += tps65023-regulator.o
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obj-$(CONFIG_REGULATOR_TPS6507X) += tps6507x-regulator.o
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obj-$(CONFIG_REGULATOR_TPS65086) += tps65086-regulator.o

‎drivers/regulator/tps6287x-regulator.c‎

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// SPDX-License-Identifier: GPL-2.0-only
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/*
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* Copyright (C) 2023 Axis Communications AB
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*
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* Driver for Texas Instruments TPS6287x PMIC.
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* Datasheet: https://www.ti.com/lit/ds/symlink/tps62873.pdf
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*/
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#include <linux/err.h>
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#include <linux/i2c.h>
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#include <linux/module.h>
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#include <linux/of_device.h>
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#include <linux/regmap.h>
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#include <linux/regulator/of_regulator.h>
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#include <linux/regulator/machine.h>
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#include <linux/regulator/driver.h>
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#include <linux/bitfield.h>
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#include <linux/linear_range.h>
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#define TPS6287X_VSET 0x00
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#define TPS6287X_CTRL1 0x01
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#define TPS6287X_CTRL1_VRAMP GENMASK(1, 0)
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#define TPS6287X_CTRL1_FPWMEN BIT(4)
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#define TPS6287X_CTRL1_SWEN BIT(5)
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#define TPS6287X_CTRL2 0x02
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#define TPS6287X_CTRL2_VRANGE GENMASK(3, 2)
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#define TPS6287X_CTRL3 0x03
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#define TPS6287X_STATUS 0x04
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static const struct regmap_config tps6287x_regmap_config = {
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.reg_bits = 8,
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.val_bits = 8,
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.max_register = TPS6287X_STATUS,
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};
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static const struct linear_range tps6287x_voltage_ranges[] = {
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LINEAR_RANGE(400000, 0, 0xFF, 1250),
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LINEAR_RANGE(400000, 0, 0xFF, 2500),
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LINEAR_RANGE(400000, 0, 0xFF, 5000),
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LINEAR_RANGE(800000, 0, 0xFF, 10000),
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};
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static const unsigned int tps6287x_voltage_range_sel[] = {
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0x0, 0x4, 0x8, 0xC
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};
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static const unsigned int tps6287x_ramp_table[] = {
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10000, 5000, 1250, 500
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};
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static int tps6287x_set_mode(struct regulator_dev *rdev, unsigned int mode)
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{
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unsigned int val;
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switch (mode) {
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case REGULATOR_MODE_NORMAL:
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val = 0;
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break;
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case REGULATOR_MODE_FAST:
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val = TPS6287X_CTRL1_FPWMEN;
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break;
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default:
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return -EINVAL;
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}
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return regmap_update_bits(rdev->regmap, TPS6287X_CTRL1,
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TPS6287X_CTRL1_FPWMEN, val);
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}
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static unsigned int tps6287x_get_mode(struct regulator_dev *rdev)
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{
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unsigned int val;
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int ret;
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ret = regmap_read(rdev->regmap, TPS6287X_CTRL1, &val);
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if (ret < 0)
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return 0;
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return (val & TPS6287X_CTRL1_FPWMEN) ? REGULATOR_MODE_FAST :
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REGULATOR_MODE_NORMAL;
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}
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static unsigned int tps6287x_of_map_mode(unsigned int mode)
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{
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switch (mode) {
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case REGULATOR_MODE_NORMAL:
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case REGULATOR_MODE_FAST:
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return mode;
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default:
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return REGULATOR_MODE_INVALID;
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}
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}
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static const struct regulator_ops tps6287x_regulator_ops = {
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.enable = regulator_enable_regmap,
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.disable = regulator_disable_regmap,
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.set_mode = tps6287x_set_mode,
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.get_mode = tps6287x_get_mode,
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.is_enabled = regulator_is_enabled_regmap,
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.get_voltage_sel = regulator_get_voltage_sel_pickable_regmap,
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.set_voltage_sel = regulator_set_voltage_sel_pickable_regmap,
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.list_voltage = regulator_list_voltage_pickable_linear_range,
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.set_ramp_delay = regulator_set_ramp_delay_regmap,
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};
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static struct regulator_desc tps6287x_reg = {
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.name = "tps6287x",
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.owner = THIS_MODULE,
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.ops = &tps6287x_regulator_ops,
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.of_map_mode = tps6287x_of_map_mode,
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.type = REGULATOR_VOLTAGE,
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.enable_reg = TPS6287X_CTRL1,
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.enable_mask = TPS6287X_CTRL1_SWEN,
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.vsel_reg = TPS6287X_VSET,
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.vsel_mask = 0xFF,
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.vsel_range_reg = TPS6287X_CTRL2,
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.vsel_range_mask = TPS6287X_CTRL2_VRANGE,
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.ramp_reg = TPS6287X_CTRL1,
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.ramp_mask = TPS6287X_CTRL1_VRAMP,
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.ramp_delay_table = tps6287x_ramp_table,
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.n_ramp_values = ARRAY_SIZE(tps6287x_ramp_table),
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.linear_ranges = tps6287x_voltage_ranges,
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.n_linear_ranges = ARRAY_SIZE(tps6287x_voltage_ranges),
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.linear_range_selectors = tps6287x_voltage_range_sel,
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};
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static int tps6287x_i2c_probe(struct i2c_client *i2c)
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{
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struct device *dev = &i2c->dev;
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struct regulator_config config = {};
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struct regulator_dev *rdev;
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config.regmap = devm_regmap_init_i2c(i2c, &tps6287x_regmap_config);
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if (IS_ERR(config.regmap)) {
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dev_err(dev, "Failed to init i2c\n");
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return PTR_ERR(config.regmap);
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}
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config.dev = dev;
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config.of_node = dev->of_node;
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config.init_data = of_get_regulator_init_data(dev, dev->of_node,
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&tps6287x_reg);
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rdev = devm_regulator_register(dev, &tps6287x_reg, &config);
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if (IS_ERR(rdev)) {
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dev_err(dev, "Failed to register regulator\n");
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return PTR_ERR(rdev);
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}
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dev_dbg(dev, "Probed regulator\n");
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return 0;
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}
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static const struct of_device_id tps6287x_dt_ids[] = {
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{ .compatible = "ti,tps62870", },
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{ .compatible = "ti,tps62871", },
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{ .compatible = "ti,tps62872", },
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{ .compatible = "ti,tps62873", },
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{ }
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};
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MODULE_DEVICE_TABLE(of, tps6287x_dt_ids);
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static const struct i2c_device_id tps6287x_i2c_id[] = {
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{ "tps62870", 0 },
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{ "tps62871", 0 },
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{ "tps62872", 0 },
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{ "tps62873", 0 },
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{},
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};
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MODULE_DEVICE_TABLE(i2c, tps6287x_i2c_id);
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static struct i2c_driver tps6287x_regulator_driver = {
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.driver = {
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.name = "tps6287x",
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.of_match_table = tps6287x_dt_ids,
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},
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.probe_new = tps6287x_i2c_probe,
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.id_table = tps6287x_i2c_id,
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};
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module_i2c_driver(tps6287x_regulator_driver);
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MODULE_AUTHOR("Mårten Lindahl <marten.lindahl@axis.com>");
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MODULE_DESCRIPTION("Regulator driver for TI TPS6287X PMIC");
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MODULE_LICENSE("GPL");

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