133 строки
3.6 KiB
C
133 строки
3.6 KiB
C
// SPDX-License-Identifier: GPL-2.0
|
|
// Copyright (C) STMicroelectronics 2019
|
|
// Author(s): Fabrice Gasnier <fabrice.gasnier@st.com>.
|
|
|
|
#include <linux/mfd/syscon.h>
|
|
#include <linux/module.h>
|
|
#include <linux/of_device.h>
|
|
#include <linux/platform_device.h>
|
|
#include <linux/regmap.h>
|
|
#include <linux/regulator/driver.h>
|
|
#include <linux/regulator/of_regulator.h>
|
|
|
|
/* STM32H7 SYSCFG register */
|
|
#define STM32H7_SYSCFG_PMCR 0x04
|
|
#define STM32H7_SYSCFG_BOOSTE_MASK BIT(8)
|
|
|
|
/* STM32MP1 SYSCFG has set and clear registers */
|
|
#define STM32MP1_SYSCFG_PMCSETR 0x04
|
|
#define STM32MP1_SYSCFG_PMCCLRR 0x44
|
|
#define STM32MP1_SYSCFG_EN_BOOSTER_MASK BIT(8)
|
|
|
|
static const struct regulator_ops stm32h7_booster_ops = {
|
|
.list_voltage = regulator_list_voltage_linear,
|
|
.enable = regulator_enable_regmap,
|
|
.disable = regulator_disable_regmap,
|
|
.is_enabled = regulator_is_enabled_regmap,
|
|
};
|
|
|
|
static const struct regulator_desc stm32h7_booster_desc = {
|
|
.name = "booster",
|
|
.supply_name = "vdda",
|
|
.n_voltages = 1,
|
|
.type = REGULATOR_VOLTAGE,
|
|
.min_uV = 3300000,
|
|
.fixed_uV = 3300000,
|
|
.ramp_delay = 66000, /* up to 50us to stabilize */
|
|
.ops = &stm32h7_booster_ops,
|
|
.enable_reg = STM32H7_SYSCFG_PMCR,
|
|
.enable_mask = STM32H7_SYSCFG_BOOSTE_MASK,
|
|
.owner = THIS_MODULE,
|
|
};
|
|
|
|
static int stm32mp1_booster_enable(struct regulator_dev *rdev)
|
|
{
|
|
return regmap_write(rdev->regmap, STM32MP1_SYSCFG_PMCSETR,
|
|
STM32MP1_SYSCFG_EN_BOOSTER_MASK);
|
|
}
|
|
|
|
static int stm32mp1_booster_disable(struct regulator_dev *rdev)
|
|
{
|
|
return regmap_write(rdev->regmap, STM32MP1_SYSCFG_PMCCLRR,
|
|
STM32MP1_SYSCFG_EN_BOOSTER_MASK);
|
|
}
|
|
|
|
static const struct regulator_ops stm32mp1_booster_ops = {
|
|
.list_voltage = regulator_list_voltage_linear,
|
|
.enable = stm32mp1_booster_enable,
|
|
.disable = stm32mp1_booster_disable,
|
|
.is_enabled = regulator_is_enabled_regmap,
|
|
};
|
|
|
|
static const struct regulator_desc stm32mp1_booster_desc = {
|
|
.name = "booster",
|
|
.supply_name = "vdda",
|
|
.n_voltages = 1,
|
|
.type = REGULATOR_VOLTAGE,
|
|
.min_uV = 3300000,
|
|
.fixed_uV = 3300000,
|
|
.ramp_delay = 66000,
|
|
.ops = &stm32mp1_booster_ops,
|
|
.enable_reg = STM32MP1_SYSCFG_PMCSETR,
|
|
.enable_mask = STM32MP1_SYSCFG_EN_BOOSTER_MASK,
|
|
.owner = THIS_MODULE,
|
|
};
|
|
|
|
static int stm32_booster_probe(struct platform_device *pdev)
|
|
{
|
|
struct device *dev = &pdev->dev;
|
|
struct device_node *np = pdev->dev.of_node;
|
|
struct regulator_config config = { };
|
|
const struct regulator_desc *desc;
|
|
struct regulator_dev *rdev;
|
|
struct regmap *regmap;
|
|
int ret;
|
|
|
|
regmap = syscon_regmap_lookup_by_phandle(np, "st,syscfg");
|
|
if (IS_ERR(regmap))
|
|
return PTR_ERR(regmap);
|
|
|
|
desc = (const struct regulator_desc *)
|
|
of_match_device(dev->driver->of_match_table, dev)->data;
|
|
|
|
config.regmap = regmap;
|
|
config.dev = dev;
|
|
config.of_node = np;
|
|
config.init_data = of_get_regulator_init_data(dev, np, desc);
|
|
|
|
rdev = devm_regulator_register(dev, desc, &config);
|
|
if (IS_ERR(rdev)) {
|
|
ret = PTR_ERR(rdev);
|
|
dev_err(dev, "register failed with error %d\n", ret);
|
|
return ret;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static const struct of_device_id stm32_booster_of_match[] = {
|
|
{
|
|
.compatible = "st,stm32h7-booster",
|
|
.data = (void *)&stm32h7_booster_desc
|
|
}, {
|
|
.compatible = "st,stm32mp1-booster",
|
|
.data = (void *)&stm32mp1_booster_desc
|
|
}, {
|
|
},
|
|
};
|
|
MODULE_DEVICE_TABLE(of, stm32_booster_of_match);
|
|
|
|
static struct platform_driver stm32_booster_driver = {
|
|
.probe = stm32_booster_probe,
|
|
.driver = {
|
|
.name = "stm32-booster",
|
|
.of_match_table = of_match_ptr(stm32_booster_of_match),
|
|
},
|
|
};
|
|
module_platform_driver(stm32_booster_driver);
|
|
|
|
MODULE_LICENSE("GPL v2");
|
|
MODULE_AUTHOR("Fabrice Gasnier <fabrice.gasnier@st.com>");
|
|
MODULE_DESCRIPTION("STMicroelectronics STM32 booster regulator driver");
|
|
MODULE_ALIAS("platform:stm32-booster");
|