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// SPDX-License-Identifier: GPL-2.0-or-later
/*
* Copyright (c) 2022 Analog Devices, Inc.
* ADI Regulator driver for the MAX77540 and MAX77541
*/
#include <linux/mfd/max77541.h>
#include <linux/mod_devicetable.h>
#include <linux/platform_device.h>
#include <linux/regmap.h>
#include <linux/regulator/driver.h>
static const struct regulator_ops max77541_buck_ops = {
.enable = regulator_enable_regmap,
.disable = regulator_disable_regmap,
.is_enabled = regulator_is_enabled_regmap,
.list_voltage = regulator_list_voltage_pickable_linear_range,
.get_voltage_sel = regulator_get_voltage_sel_pickable_regmap,
.set_voltage_sel = regulator_set_voltage_sel_pickable_regmap,
};
static const struct linear_range max77540_buck_ranges[] = {
/* Ranges when VOLT_SEL bits are 0x00 */
REGULATOR_LINEAR_RANGE(500000, 0x00, 0x8B, 5000),
REGULATOR_LINEAR_RANGE(1200000, 0x8C, 0xFF, 0),
/* Ranges when VOLT_SEL bits are 0x40 */
REGULATOR_LINEAR_RANGE(1200000, 0x00, 0x8B, 10000),
REGULATOR_LINEAR_RANGE(2400000, 0x8C, 0xFF, 0),
/* Ranges when VOLT_SEL bits are 0x80 */
REGULATOR_LINEAR_RANGE(2000000, 0x00, 0x9F, 20000),
REGULATOR_LINEAR_RANGE(5200000, 0xA0, 0xFF, 0),
};
static const struct linear_range max77541_buck_ranges[] = {
/* Ranges when VOLT_SEL bits are 0x00 */
REGULATOR_LINEAR_RANGE(300000, 0x00, 0xB3, 5000),
REGULATOR_LINEAR_RANGE(1200000, 0xB4, 0xFF, 0),
/* Ranges when VOLT_SEL bits are 0x40 */
REGULATOR_LINEAR_RANGE(1200000, 0x00, 0x8B, 10000),
REGULATOR_LINEAR_RANGE(2400000, 0x8C, 0xFF, 0),
/* Ranges when VOLT_SEL bits are 0x80 */
REGULATOR_LINEAR_RANGE(2000000, 0x00, 0x9F, 20000),
REGULATOR_LINEAR_RANGE(5200000, 0xA0, 0xFF, 0),
};
static const unsigned int max77541_buck_volt_range_sel[] = {
0x0, 0x0, 0x1, 0x1, 0x2, 0x2,
};
enum max77541_regulators {
MAX77541_BUCK1 = 1,
MAX77541_BUCK2,
};
#define MAX77540_BUCK(_id, _ops) \
{ .id = MAX77541_BUCK ## _id, \
.name = "buck"#_id, \
.of_match = "buck"#_id, \
.regulators_node = "regulators", \
.enable_reg = MAX77541_REG_EN_CTRL, \
.enable_mask = MAX77541_BIT_M ## _id ## _EN, \
.ops = &(_ops), \
.type = REGULATOR_VOLTAGE, \
.linear_ranges = max77540_buck_ranges, \
.n_linear_ranges = ARRAY_SIZE(max77540_buck_ranges), \
.vsel_reg = MAX77541_REG_M ## _id ## _VOUT, \
.vsel_mask = MAX77541_BITS_MX_VOUT, \
.vsel_range_reg = MAX77541_REG_M ## _id ## _CFG1, \
.vsel_range_mask = MAX77541_BITS_MX_CFG1_RNG, \
.linear_range_selectors_bitfield = max77541_buck_volt_range_sel, \
.owner = THIS_MODULE, \
}
#define MAX77541_BUCK(_id, _ops) \
{ .id = MAX77541_BUCK ## _id, \
.name = "buck"#_id, \
.of_match = "buck"#_id, \
.regulators_node = "regulators", \
.enable_reg = MAX77541_REG_EN_CTRL, \
.enable_mask = MAX77541_BIT_M ## _id ## _EN, \
.ops = &(_ops), \
.type = REGULATOR_VOLTAGE, \
.linear_ranges = max77541_buck_ranges, \
.n_linear_ranges = ARRAY_SIZE(max77541_buck_ranges), \
.vsel_reg = MAX77541_REG_M ## _id ## _VOUT, \
.vsel_mask = MAX77541_BITS_MX_VOUT, \
.vsel_range_reg = MAX77541_REG_M ## _id ## _CFG1, \
.vsel_range_mask = MAX77541_BITS_MX_CFG1_RNG, \
.linear_range_selectors_bitfield = max77541_buck_volt_range_sel, \
.owner = THIS_MODULE, \
}
static const struct regulator_desc max77540_regulators_desc[] = {
MAX77540_BUCK(1, max77541_buck_ops),
MAX77540_BUCK(2, max77541_buck_ops),
};
static const struct regulator_desc max77541_regulators_desc[] = {
MAX77541_BUCK(1, max77541_buck_ops),
MAX77541_BUCK(2, max77541_buck_ops),
};
static int max77541_regulator_probe(struct platform_device *pdev)
{
struct regulator_config config = {};
const struct regulator_desc *desc;
struct device *dev = &pdev->dev;
struct regulator_dev *rdev;
struct max77541 *max77541 = dev_get_drvdata(dev->parent);
unsigned int i;
config.dev = dev->parent;
switch (max77541->id) {
case MAX77540:
desc = max77540_regulators_desc;
break;
case MAX77541:
desc = max77541_regulators_desc;
break;
default:
return -EINVAL;
}
for (i = 0; i < MAX77541_MAX_REGULATORS; i++) {
rdev = devm_regulator_register(dev, &desc[i], &config);
if (IS_ERR(rdev))
return dev_err_probe(dev, PTR_ERR(rdev),
"Failed to register regulator\n");
}
return 0;
}
static const struct platform_device_id max77541_regulator_platform_id[] = {
{ "max77540-regulator" },
{ "max77541-regulator" },
{ }
};
MODULE_DEVICE_TABLE(platform, max77541_regulator_platform_id);
static struct platform_driver max77541_regulator_driver = {
.driver = {
.name = "max77541-regulator",
},
.probe = max77541_regulator_probe,
.id_table = max77541_regulator_platform_id,
};
module_platform_driver(max77541_regulator_driver);
MODULE_AUTHOR("Okan Sahin <Okan.Sahin@analog.com>");
MODULE_DESCRIPTION("MAX77540/MAX77541 regulator driver");
MODULE_LICENSE("GPL");
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