From f2fbe0a4251b101f283b31b8d65ff5e130064788 Mon Sep 17 00:00:00 2001 From: Okan Sahin Date: Tue, 27 Dec 2022 01:38:37 +0300 Subject: [PATCH] drivers: regulator: Add MAX77541 Regulator Support 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 --- MAINTAINERS | 1 + drivers/regulator/Kconfig | 9 ++ drivers/regulator/Makefile | 1 + drivers/regulator/max77541-regulator.c | 161 +++++++++++++++++++++++++ 4 files changed, 172 insertions(+) create mode 100644 drivers/regulator/max77541-regulator.c diff --git a/MAINTAINERS b/MAINTAINERS index f93411c8122af8..3546cd9464e60b 100644 --- a/MAINTAINERS +++ b/MAINTAINERS @@ -12503,6 +12503,7 @@ L: linux-kernel@vger.kernel.org S: Maintained F: Documentation/devicetree/bindings/mfd/adi,max77541.yaml F: drivers/mfd/max77541.c +F: drivers/regulator/max77541-regulator.c F: include/linux/mfd/max77541.h MAXIM MAX77650 PMIC MFD DRIVER diff --git a/drivers/regulator/Kconfig b/drivers/regulator/Kconfig index 070e4403c6c24a..1e416c195af950 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 5962307e1130df..c19efc7cfbefb0 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 00000000000000..c1c5dba50ca2bb --- /dev/null +++ b/drivers/regulator/max77541-regulator.c @@ -0,0 +1,161 @@ +// SPDX-License-Identifier: GPL-2.0-or-later +/* + * Copyright (c) 2022 Analog Devices, Inc. + * ADI Regulator driver for the MAX77540 and MAX77541 + */ + +#include +#include +#include +#include +#include +#include + +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, +}; + +#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 max77541_dev *max77541 = dev_get_drvdata(pdev->dev.parent); + struct regulator_config config = {}; + const struct regulator_desc *desc; + struct device *dev = &pdev->dev; + struct regulator_dev *rdev; + int i; + + config.dev = pdev->dev.parent; + + if (max77541->id == MAX77540) + desc = max77540_regulators_desc; + else if (max77541->id == MAX77541) + desc = max77541_regulators_desc; + else + 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"); + break; + } + + return 0; +} + +static const struct platform_device_id max77541_regulator_platform_id[] = { + { "max77540-regulator", MAX77540 }, + { "max77541-regulator", MAX77541 }, + { /* sentinel */ } +}; +MODULE_DEVICE_TABLE(platform, max77541_regulator_platform_id); + +static const struct of_device_id max77541_regulator_of_id[] = { + { + .compatible = "adi,max77540-regulator", + .data = (void *)MAX77540, + }, + { + .compatible = "adi,max77541-regulator", + .data = (void *)MAX77541, + }, + { /* sentinel */ } +}; +MODULE_DEVICE_TABLE(of, max77541_regulator_of_id); + +static struct platform_driver max77541_regulator_driver = { + .driver = { + .name = "max77541-regulator", + .of_match_table = max77541_regulator_of_id, + }, + .probe = max77541_regulator_probe, + .id_table = max77541_regulator_platform_id, +}; +module_platform_driver(max77541_regulator_driver); + +MODULE_AUTHOR("Okan Sahin "); +MODULE_DESCRIPTION("MAX77540/MAX77541 regulator driver"); +MODULE_LICENSE("GPL");