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regulator: Add Richtek RT4803 boost regulator

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RT4803 is a boost converter that integrates an internal bypass FET. It
will automatically transform the operation mode between bypass and boost
based on the voltage difference of the input and output voltage.

Signed-off-by: ChiYuan Huang <cy_huang@richtek.com>
Link: https://lore.kernel.org/r/1680050606-461-2-git-send-email-cy_huang@richtek.com
Signed-off-by: Mark Brown <broonie@kernel.org>
This commit is contained in:
ChiYuan Huang 2023-03-29 08:43:26 +08:00 committed by Mark Brown
parent e126cdaad1
commit 6928a3c082
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GPG Key ID: 24D68B725D5487D0
3 changed files with 227 additions and 0 deletions
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10
drivers/regulator/Kconfig
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@ -1082,6 +1082,16 @@ config REGULATOR_RT4801
This adds support for voltage regulators in Richtek RT4801 Display Bias IC.
The device supports two regulators (DSVP/DSVN).
config REGULATOR_RT4803
tristate "Richtek RT4803 boost regualtor"
depends on I2C
select REGMAP_I2C
help
This adds support for RT4803 boost converter that integrates the
bypass switch. If the input voltage is low than the required voltage,
RT4803 will enter boost mode. Otherwise, enable internal bypass
switch to enter bypass mode.
config REGULATOR_RT4831
tristate "Richtek RT4831 DSV Regulators"
depends on MFD_RT4831

1
drivers/regulator/Makefile
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@ -130,6 +130,7 @@ obj-$(CONFIG_REGULATOR_RK808) += rk808-regulator.o
obj-$(CONFIG_REGULATOR_RN5T618) += rn5t618-regulator.o
obj-$(CONFIG_REGULATOR_ROHM) += rohm-regulator.o
obj-$(CONFIG_REGULATOR_RT4801) += rt4801-regulator.o
obj-$(CONFIG_REGULATOR_RT4803) += rt4803.o
obj-$(CONFIG_REGULATOR_RT4831) += rt4831-regulator.o
obj-$(CONFIG_REGULATOR_RT5033) += rt5033-regulator.o
obj-$(CONFIG_REGULATOR_RT5120) += rt5120-regulator.o

216
drivers/regulator/rt4803.c Normal file
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@ -0,0 +1,216 @@
// SPDX-License-Identifier: GPL-2.0-only
/*
* Copyright (C) 2023 Richtek Technology Corp.
*
* Author: ChiYuan Huang <cy_huang@richtek.com>
*/
#include <linux/i2c.h>
#include <linux/kernel.h>
#include <linux/mod_devicetable.h>
#include <linux/module.h>
#include <linux/property.h>
#include <linux/regmap.h>
#include <linux/regulator/driver.h>
#include <linux/regulator/of_regulator.h>
#define RT4803_AUTO_MODE 1
#define RT4803_FPWM_MODE 2
#define RT4803_REG_CONFIG 0x01
#define RT4803_REG_VSELL 0x02
#define RT4803_REG_VSELH 0x03
#define RT4803_REG_ILIM 0x04
#define RT4803_REG_STAT 0x05
#define RT4803_MODE_MASK GENMASK(1, 0)
#define RT4803_VSEL_MASK GENMASK(4, 0)
#define RT4803_ILIM_MASK GENMASK(3, 0)
#define RT4803_TSD_MASK BIT(7)
#define RT4803_HOTDIE_MASK BIT(6)
#define RT4803_FAULT_MASK BIT(1)
#define RT4803_PGOOD_MASK BIT(0)
#define RT4803_VOUT_MINUV 2850000
#define RT4803_VOUT_STEPUV 50000
#define RT4803_VOUT_NUM 32
static int rt4803_set_mode(struct regulator_dev *rdev, unsigned int mode)
{
struct regmap *regmap = rdev_get_regmap(rdev);
unsigned int modeval;
switch (mode) {
case REGULATOR_MODE_NORMAL:
modeval = RT4803_AUTO_MODE;
break;
case REGULATOR_MODE_FAST:
modeval = RT4803_FPWM_MODE;
break;
default:
return -EINVAL;
}
modeval <<= ffs(RT4803_MODE_MASK) - 1;
return regmap_update_bits(regmap, RT4803_REG_CONFIG, RT4803_MODE_MASK, modeval);
}
static unsigned int rt4803_get_mode(struct regulator_dev *rdev)
{
struct regmap *regmap = rdev_get_regmap(rdev);
unsigned int modeval;
int ret;
ret = regmap_read(regmap, RT4803_REG_CONFIG, &modeval);
if (ret)
return REGULATOR_MODE_INVALID;
modeval >>= ffs(RT4803_MODE_MASK) - 1;
switch (modeval) {
case RT4803_AUTO_MODE:
return REGULATOR_MODE_NORMAL;
case RT4803_FPWM_MODE:
return REGULATOR_MODE_FAST;
default:
return REGULATOR_MODE_INVALID;
}
}
static int rt4803_get_error_flags(struct regulator_dev *rdev, unsigned int *flags)
{
struct regmap *regmap = rdev_get_regmap(rdev);
unsigned int state, events = 0;
int ret;
ret = regmap_read(regmap, RT4803_REG_STAT, &state);
if (ret)
return ret;
if (state & RT4803_PGOOD_MASK)
goto out_error_flag;
if (state & RT4803_FAULT_MASK)
events |= REGULATOR_ERROR_FAIL;
if (state & RT4803_HOTDIE_MASK)
events |= REGULATOR_ERROR_OVER_TEMP_WARN;
if (state & RT4803_TSD_MASK)
events |= REGULATOR_ERROR_OVER_TEMP;
out_error_flag:
*flags = events;
return 0;
}
static int rt4803_set_suspend_voltage(struct regulator_dev *rdev, int uV)
{
struct regmap *regmap = rdev_get_regmap(rdev);
unsigned int reg, vsel;
if (rdev->desc->vsel_reg == RT4803_REG_VSELL)
reg = RT4803_REG_VSELH;
else
reg = RT4803_REG_VSELL;
vsel = (uV - rdev->desc->min_uV) / rdev->desc->uV_step;
vsel <<= ffs(RT4803_VSEL_MASK) - 1;
return regmap_update_bits(regmap, reg, RT4803_VSEL_MASK, vsel);
}
static const struct regulator_ops rt4803_regulator_ops = {
.list_voltage = regulator_list_voltage_linear,
.set_voltage_sel = regulator_set_voltage_sel_regmap,
.get_voltage_sel = regulator_get_voltage_sel_regmap,
.set_mode = rt4803_set_mode,
.get_mode = rt4803_get_mode,
.get_error_flags = rt4803_get_error_flags,
.set_suspend_voltage = rt4803_set_suspend_voltage,
};
static unsigned int rt4803_of_map_mode(unsigned int mode)
{
switch (mode) {
case RT4803_AUTO_MODE:
return REGULATOR_MODE_NORMAL;
case RT4803_FPWM_MODE:
return REGULATOR_MODE_FAST;
default:
return REGULATOR_MODE_INVALID;
}
}
static const struct regmap_config rt4803_regmap_config = {
.reg_bits = 8,
.val_bits = 8,
.max_register = RT4803_REG_STAT,
};
static int rt4803_probe(struct i2c_client *i2c)
{
struct device *dev = &i2c->dev;
struct regmap *regmap;
struct regulator_desc *desc;
struct regulator_config cfg = {};
struct regulator_dev *rdev;
bool vsel_act_high;
int ret;
desc = devm_kzalloc(dev, sizeof(*desc), GFP_KERNEL);
if (!desc)
return -ENOMEM;
regmap = devm_regmap_init_i2c(i2c, &rt4803_regmap_config);
if (IS_ERR(regmap))
return dev_err_probe(dev, PTR_ERR(regmap), "Failed to init regmap\n");
/* Always configure the input current limit to max 5A at initial */
ret = regmap_update_bits(regmap, RT4803_REG_ILIM, RT4803_ILIM_MASK, 0xff);
if (ret)
return dev_err_probe(dev, ret, "Failed to config ILIM to max\n");
vsel_act_high = device_property_read_bool(dev, "richtek,vsel-active-high");
desc->name = "rt4803-regulator";
desc->type = REGULATOR_VOLTAGE;
desc->owner = THIS_MODULE;
desc->ops = &rt4803_regulator_ops;
desc->min_uV = RT4803_VOUT_MINUV;
desc->uV_step = RT4803_VOUT_STEPUV;
desc->n_voltages = RT4803_VOUT_NUM;
desc->vsel_mask = RT4803_VSEL_MASK;
desc->of_map_mode = rt4803_of_map_mode;
if (vsel_act_high)
desc->vsel_reg = RT4803_REG_VSELH;
else
desc->vsel_reg = RT4803_REG_VSELL;
cfg.dev = dev;
cfg.of_node = dev_of_node(dev);
cfg.init_data = of_get_regulator_init_data(dev, dev_of_node(dev), desc);
rdev = devm_regulator_register(dev, desc, &cfg);
return PTR_ERR_OR_ZERO(rdev);
}
static const struct of_device_id rt4803_device_match_table[] = {
{ .compatible = "richtek,rt4803" },
{}
};
MODULE_DEVICE_TABLE(of, rt4803_device_match_table);
static struct i2c_driver rt4803_driver = {
.driver = {
.name = "rt4803",
.of_match_table = rt4803_device_match_table,
},
.probe = rt4803_probe,
};
module_i2c_driver(rt4803_driver);
MODULE_DESCRIPTION("Richtek RT4803 voltage regulator driver");
MODULE_AUTHOR("ChiYuan Huang <cy_huang@richtek.com>");
MODULE_LICENSE("GPL");