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// SPDX-License-Identifier: GPL-2.0+
//
// s2dos05.c - Regulator driver for the Samsung s2dos05
//
// Copyright (C) 2025 Dzmitry Sankouski <dsankouski@gmail.com>
#include <linux/bug.h>
#include <linux/delay.h>
#include <linux/err.h>
#include <linux/slab.h>
#include <linux/module.h>
#include <linux/regmap.h>
#include <linux/interrupt.h>
#include <linux/platform_device.h>
#include <linux/regulator/driver.h>
#include <linux/regulator/machine.h>
#include <linux/regulator/of_regulator.h>
#include <linux/mfd/samsung/core.h>
#include <linux/regulator/s2dos05.h>
#include <linux/i2c.h>
struct s2dos05_data {
struct regmap *regmap;
struct device *dev;
};
#define _BUCK(macro) S2DOS05_BUCK##macro
#define _buck_ops(num) s2dos05_ops##num
#define _LDO(macro) S2DOS05_LDO##macro
#define _REG(ctrl) S2DOS05_REG##ctrl
#define _ldo_ops(num) s2dos05_ops##num
#define _MASK(macro) S2DOS05_ENABLE_MASK##macro
#define _TIME(macro) S2DOS05_ENABLE_TIME##macro
#define BUCK_DESC(_name, _id, _ops, m, s, v, e, em, t, a) { \
.name = _name, \
.id = _id, \
.ops = _ops, \
.of_match = of_match_ptr(_name), \
.of_match_full_name = true, \
.regulators_node = of_match_ptr("regulators"), \
.type = REGULATOR_VOLTAGE, \
.owner = THIS_MODULE, \
.min_uV = m, \
.uV_step = s, \
.n_voltages = S2DOS05_BUCK_N_VOLTAGES, \
.vsel_reg = v, \
.vsel_mask = S2DOS05_BUCK_VSEL_MASK, \
.enable_reg = e, \
.enable_mask = em, \
.enable_time = t, \
.active_discharge_off = 0, \
.active_discharge_on = S2DOS05_BUCK_FD_MASK, \
.active_discharge_reg = a, \
.active_discharge_mask = S2DOS05_BUCK_FD_MASK \
}
#define LDO_DESC(_name, _id, _ops, m, s, v, e, em, t, a) { \
.name = _name, \
.id = _id, \
.ops = _ops, \
.of_match = of_match_ptr(_name), \
.of_match_full_name = true, \
.regulators_node = of_match_ptr("regulators"), \
.type = REGULATOR_VOLTAGE, \
.owner = THIS_MODULE, \
.min_uV = m, \
.uV_step = s, \
.n_voltages = S2DOS05_LDO_N_VOLTAGES, \
.vsel_reg = v, \
.vsel_mask = S2DOS05_LDO_VSEL_MASK, \
.enable_reg = e, \
.enable_mask = em, \
.enable_time = t, \
.active_discharge_off = 0, \
.active_discharge_on = S2DOS05_LDO_FD_MASK, \
.active_discharge_reg = a, \
.active_discharge_mask = S2DOS05_LDO_FD_MASK \
}
static const struct regulator_ops s2dos05_ops = {
.list_voltage = regulator_list_voltage_linear,
.map_voltage = regulator_map_voltage_linear,
.is_enabled = regulator_is_enabled_regmap,
.enable = regulator_enable_regmap,
.disable = regulator_disable_regmap,
.get_voltage_sel = regulator_get_voltage_sel_regmap,
.set_voltage_sel = regulator_set_voltage_sel_regmap,
.set_voltage_time_sel = regulator_set_voltage_time_sel,
.set_active_discharge = regulator_set_active_discharge_regmap,
};
static const struct regulator_desc regulators[S2DOS05_REGULATOR_MAX] = {
// name, id, ops, min_uv, uV_step, vsel_reg, enable_reg
LDO_DESC("ldo1", _LDO(1), &_ldo_ops(), _LDO(_MIN1),
_LDO(_STEP1), _REG(_LDO1_CFG),
_REG(_EN), _MASK(_L1), _TIME(_LDO), _REG(_LDO1_CFG)),
LDO_DESC("ldo2", _LDO(2), &_ldo_ops(), _LDO(_MIN1),
_LDO(_STEP1), _REG(_LDO2_CFG),
_REG(_EN), _MASK(_L2), _TIME(_LDO), _REG(_LDO2_CFG)),
LDO_DESC("ldo3", _LDO(3), &_ldo_ops(), _LDO(_MIN2),
_LDO(_STEP1), _REG(_LDO3_CFG),
_REG(_EN), _MASK(_L3), _TIME(_LDO), _REG(_LDO3_CFG)),
LDO_DESC("ldo4", _LDO(4), &_ldo_ops(), _LDO(_MIN2),
_LDO(_STEP1), _REG(_LDO4_CFG),
_REG(_EN), _MASK(_L4), _TIME(_LDO), _REG(_LDO4_CFG)),
BUCK_DESC("buck", _BUCK(1), &_buck_ops(), _BUCK(_MIN1),
_BUCK(_STEP1), _REG(_BUCK_VOUT),
_REG(_EN), _MASK(_B1), _TIME(_BUCK), _REG(_BUCK_CFG)),
};
static int s2dos05_pmic_probe(struct platform_device *pdev)
{
struct device *dev = &pdev->dev;
struct sec_pmic_dev *iodev = dev_get_drvdata(pdev->dev.parent);
struct s2dos05_data *s2dos05;
struct regulator_config config = { };
unsigned int rdev_num = ARRAY_SIZE(regulators);
s2dos05 = devm_kzalloc(dev, sizeof(*s2dos05), GFP_KERNEL);
if (!s2dos05)
return -ENOMEM;
platform_set_drvdata(pdev, s2dos05);
s2dos05->regmap = iodev->regmap_pmic;
s2dos05->dev = dev;
if (!dev->of_node)
dev->of_node = dev->parent->of_node;
config.dev = dev;
config.driver_data = s2dos05;
for (int i = 0; i < rdev_num; i++) {
struct regulator_dev *regulator;
regulator = devm_regulator_register(&pdev->dev,
®ulators[i], &config);
if (IS_ERR(regulator)) {
return dev_err_probe(&pdev->dev, PTR_ERR(regulator),
"regulator init failed for %d\n", i);
}
}
return 0;
}
static const struct platform_device_id s2dos05_pmic_id[] = {
{ "s2dos05-regulator" },
{ },
};
MODULE_DEVICE_TABLE(platform, s2dos05_pmic_id);
static struct platform_driver s2dos05_platform_driver = {
.driver = {
.name = "s2dos05",
},
.probe = s2dos05_pmic_probe,
.id_table = s2dos05_pmic_id,
};
module_platform_driver(s2dos05_platform_driver);
MODULE_AUTHOR("Dzmitry Sankouski <dsankouski@gmail.com>");
MODULE_DESCRIPTION("Samsung S2DOS05 Regulator Driver");
MODULE_LICENSE("GPL");
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