regulator: fan53880: Add initial support
This patch adds support for ON Semiconductor FAN53880 regulator. The FAN53880 is an I2C porgrammable power management IC (PMIC) that contains a BUCK (step-down converter), four LDOs (low dropouts) and one BOOST (step-up converter). It is designed for mobile power applications. Signed-off-by: Christoph Fritz <chf.fritz@googlemail.com> Link: https://lore.kernel.org/r/20200702210846.31659-2-chf.fritz@googlemail.com Signed-off-by: Mark Brown <broonie@kernel.org>
This commit is contained in:
Christoph Fritz
Mark Brown
parent
8cc31dc941
commit
e6dea51e2d
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@ -336,6 +336,16 @@ config REGULATOR_FAN53555
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input voltage supply of 2.5V to 5.5V. The output voltage is
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programmed through an I2C interface.
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config REGULATOR_FAN53880
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tristate "Fairchild FAN53880 Regulator"
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depends on I2C
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select REGMAP_I2C
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help
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This driver supports Fairchild (ON Semiconductor) FAN53880
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regulator. The regulator is a programmable power management IC
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(PMIC), it is controlled by I2C and provides one BUCK, one BOOST
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and four LDO outputs.
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config REGULATOR_GPIO
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tristate "GPIO regulator support"
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depends on GPIOLIB || COMPILE_TEST
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@ -42,6 +42,7 @@ obj-$(CONFIG_REGULATOR_DA9211) += da9211-regulator.o
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obj-$(CONFIG_REGULATOR_DBX500_PRCMU) += dbx500-prcmu.o
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obj-$(CONFIG_REGULATOR_DB8500_PRCMU) += db8500-prcmu.o
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obj-$(CONFIG_REGULATOR_FAN53555) += fan53555.o
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obj-$(CONFIG_REGULATOR_FAN53880) += fan53880.o
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obj-$(CONFIG_REGULATOR_GPIO) += gpio-regulator.o
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obj-$(CONFIG_REGULATOR_HI6421) += hi6421-regulator.o
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obj-$(CONFIG_REGULATOR_HI6421V530) += hi6421v530-regulator.o
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@ -0,0 +1,179 @@
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// SPDX-License-Identifier: GPL-2.0+
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#include <linux/module.h>
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#include <linux/i2c.h>
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#include <linux/regmap.h>
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#include <linux/regulator/driver.h>
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enum fan53880_regulator_ids {
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FAN53880_LDO1,
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FAN53880_LDO2,
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FAN53880_LDO3,
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FAN53880_LDO4,
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FAN53880_BUCK,
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FAN53880_BOOST,
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};
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enum fan53880_registers {
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FAN53880_PRODUCT_ID = 0x00,
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FAN53880_SILICON_REV,
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FAN53880_BUCKVOUT,
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FAN53880_BOOSTVOUT,
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FAN53880_LDO1VOUT,
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FAN53880_LDO2VOUT,
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FAN53880_LDO3VOUT,
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FAN53880_LDO4VOUT,
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FAN53880_IOUT,
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FAN53880_ENABLE,
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FAN53880_ENABLE_BOOST,
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};
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#define FAN53880_ID 0x01
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static const struct regulator_ops fan53880_ops = {
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.list_voltage = regulator_list_voltage_linear_range,
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.map_voltage = regulator_map_voltage_linear_range,
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.set_voltage_sel = regulator_set_voltage_sel_regmap,
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.get_voltage_sel = regulator_get_voltage_sel_regmap,
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.enable = regulator_enable_regmap,
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.disable = regulator_disable_regmap,
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.is_enabled = regulator_is_enabled_regmap,
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};
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#define FAN53880_LDO(_num, _supply, _default) \
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[FAN53880_LDO ## _num] = { \
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.name = "LDO"#_num, \
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.of_match = of_match_ptr("LDO"#_num), \
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.regulators_node = of_match_ptr("regulators"), \
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.type = REGULATOR_VOLTAGE, \
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.linear_ranges = (struct linear_range[]) { \
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REGULATOR_LINEAR_RANGE(_default, 0x0, 0x0, 0), \
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REGULATOR_LINEAR_RANGE(800000, 0xf, 0x73, 25000), \
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}, \
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.n_linear_ranges = 2, \
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.vsel_reg = FAN53880_LDO ## _num ## VOUT, \
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.vsel_mask = 0x7f, \
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.enable_reg = FAN53880_ENABLE, \
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.enable_mask = BIT(_num - 1), \
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.enable_time = 150, \
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.supply_name = _supply, \
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.ops = &fan53880_ops, \
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}
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static const struct regulator_desc fan53880_regulators[] = {
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FAN53880_LDO(1, "VIN12", 2800000),
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FAN53880_LDO(2, "VIN12", 2800000),
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FAN53880_LDO(3, "VIN3", 1800000),
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FAN53880_LDO(4, "VIN4", 1800000),
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[FAN53880_BUCK] = {
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.name = "BUCK",
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.of_match = of_match_ptr("BUCK"),
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.regulators_node = of_match_ptr("regulators"),
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.type = REGULATOR_VOLTAGE,
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.linear_ranges = (struct linear_range[]) {
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REGULATOR_LINEAR_RANGE(1100000, 0x0, 0x0, 0),
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REGULATOR_LINEAR_RANGE(600000, 0x1f, 0xf7, 12500),
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},
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.n_linear_ranges = 2,
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.vsel_reg = FAN53880_BUCKVOUT,
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.vsel_mask = 0x7f,
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.enable_reg = FAN53880_ENABLE,
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.enable_mask = 0x10,
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.enable_time = 480,
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.supply_name = "PVIN",
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.ops = &fan53880_ops,
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},
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[FAN53880_BOOST] = {
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.name = "BOOST",
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.of_match = of_match_ptr("BOOST"),
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.regulators_node = of_match_ptr("regulators"),
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.type = REGULATOR_VOLTAGE,
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.linear_ranges = (struct linear_range[]) {
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REGULATOR_LINEAR_RANGE(5000000, 0x0, 0x0, 0),
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REGULATOR_LINEAR_RANGE(3000000, 0x4, 0x70, 25000),
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},
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.n_linear_ranges = 2,
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.vsel_reg = FAN53880_BOOSTVOUT,
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.vsel_mask = 0x7f,
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.enable_reg = FAN53880_ENABLE_BOOST,
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.enable_mask = 0xff,
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.enable_time = 580,
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.supply_name = "PVIN",
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.ops = &fan53880_ops,
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},
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};
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static const struct regmap_config fan53880_regmap = {
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.reg_bits = 8,
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.val_bits = 8,
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.max_register = FAN53880_ENABLE_BOOST,
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};
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static int fan53880_i2c_probe(struct i2c_client *i2c,
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const struct i2c_device_id *id)
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{
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struct regulator_config config = { };
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struct regulator_dev *rdev;
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struct regmap *regmap;
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int i, ret;
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unsigned int data;
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regmap = devm_regmap_init_i2c(i2c, &fan53880_regmap);
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if (IS_ERR(regmap)) {
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ret = PTR_ERR(regmap);
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dev_err(&i2c->dev, "Failed to create regmap: %d\n", ret);
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return ret;
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}
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ret = regmap_read(regmap, FAN53880_PRODUCT_ID, &data);
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if (ret < 0) {
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dev_err(&i2c->dev, "Failed to read PRODUCT_ID: %d\n", ret);
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return ret;
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}
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if (data != FAN53880_ID) {
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dev_err(&i2c->dev, "Unsupported device id: 0x%x.\n", data);
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return -ENODEV;
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}
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config.dev = &i2c->dev;
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config.init_data = NULL;
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for (i = 0; i < ARRAY_SIZE(fan53880_regulators); i++) {
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rdev = devm_regulator_register(&i2c->dev,
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&fan53880_regulators[i],
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&config);
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if (IS_ERR(rdev)) {
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ret = PTR_ERR(rdev);
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dev_err(&i2c->dev, "Failed to register %s: %d\n",
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fan53880_regulators[i].name, ret);
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return ret;
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}
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}
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return 0;
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}
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static const struct of_device_id fan53880_dt_ids[] = {
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{ .compatible = "onnn,fan53880", },
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{}
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};
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MODULE_DEVICE_TABLE(of, fan53880_dt_ids);
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static const struct i2c_device_id fan53880_i2c_id[] = {
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{ "fan53880", },
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{}
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};
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MODULE_DEVICE_TABLE(i2c, fan53880_i2c_id);
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static struct i2c_driver fan53880_regulator_driver = {
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.driver = {
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.name = "fan53880",
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.of_match_table = of_match_ptr(fan53880_dt_ids),
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},
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.probe = fan53880_i2c_probe,
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.id_table = fan53880_i2c_id,
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};
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module_i2c_driver(fan53880_regulator_driver);
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MODULE_DESCRIPTION("FAN53880 PMIC voltage regulator driver");
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MODULE_AUTHOR("Christoph Fritz <chf.fritz@googlemail.com>");
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MODULE_LICENSE("GPL");
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