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    Subject[PATCH v5 2/5] regulator: max77541: Add ADI MAX77541/MAX77540 Regulator Support
    Date
    Regulator driver for both MAX77541 and MAX77540.
    The MAX77541 is a high-efficiency step-down converter
    with two 3A switching phases for single-cell Li+ battery
    and 5VDC systems.

    The MAX77540 is a high-efficiency step-down converter
    with two 3A switching phases.

    Signed-off-by: Okan Sahin <okan.sahin@analog.com>
    ---
    drivers/regulator/Kconfig | 9 ++
    drivers/regulator/Makefile | 1 +
    drivers/regulator/max77541-regulator.c | 154 +++++++++++++++++++++++++
    3 files changed, 164 insertions(+)
    create mode 100644 drivers/regulator/max77541-regulator.c

    diff --git a/drivers/regulator/Kconfig b/drivers/regulator/Kconfig
    index 070e4403c6c2..1e416c195af9 100644
    --- a/drivers/regulator/Kconfig
    +++ b/drivers/regulator/Kconfig
    @@ -556,6 +556,15 @@ config REGULATOR_MAX597X
    The MAX5970/5978 is a smart switch with no output regulation, but
    fault protection and voltage and current monitoring capabilities.

    +config REGULATOR_MAX77541
    + tristate "Analog Devices MAX77541/77540 Regulator"
    + depends on MFD_MAX77541
    + help
    + This driver controls a Analog Devices MAX77541/77540 regulators
    + via I2C bus. Both MAX77540 and MAX77541 are dual-phase
    + high-efficiency buck converter. Say Y here to
    + enable the regulator driver.
    +
    config REGULATOR_MAX77620
    tristate "Maxim 77620/MAX20024 voltage regulator"
    depends on MFD_MAX77620 || COMPILE_TEST
    diff --git a/drivers/regulator/Makefile b/drivers/regulator/Makefile
    index 5962307e1130..c19efc7cfbef 100644
    --- a/drivers/regulator/Makefile
    +++ b/drivers/regulator/Makefile
    @@ -68,6 +68,7 @@ obj-$(CONFIG_REGULATOR_LTC3676) += ltc3676.o
    obj-$(CONFIG_REGULATOR_MAX14577) += max14577-regulator.o
    obj-$(CONFIG_REGULATOR_MAX1586) += max1586.o
    obj-$(CONFIG_REGULATOR_MAX597X) += max597x-regulator.o
    +obj-$(CONFIG_REGULATOR_MAX77541) += max77541-regulator.o
    obj-$(CONFIG_REGULATOR_MAX77620) += max77620-regulator.o
    obj-$(CONFIG_REGULATOR_MAX77650) += max77650-regulator.o
    obj-$(CONFIG_REGULATOR_MAX8649) += max8649.o
    diff --git a/drivers/regulator/max77541-regulator.c b/drivers/regulator/max77541-regulator.c
    new file mode 100644
    index 000000000000..75063e8de09d
    --- /dev/null
    +++ b/drivers/regulator/max77541-regulator.c
    @@ -0,0 +1,154 @@
    +// SPDX-License-Identifier: GPL-2.0-or-later
    +/*
    + * Copyright (c) 2022 Analog Devices, Inc.
    + * ADI Regulator driver for the MAX77540 and MAX77541
    + */
    +
    +#include <linux/i2c.h>
    +#include <linux/mfd/max77541.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[] = {
    + 0x00, 0x00, 0x40, 0x40, 0x80, 0x80,
    +};
    +
    +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 = 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 = 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;
    + int i;
    +
    + max77541 = dev_get_drvdata(dev->parent);
    + config.dev = dev->parent;
    +
    + switch (max77541->chip->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" },
    + { /* sentinel */ }
    +};
    +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");
    --
    2.30.2
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      Last update: 2023-03-27 00:29    [W:9.698 / U:0.004 seconds]
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