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author | Vincent Whitchurch <vincent.whitchurch@axis.com> | 2020-11-03 11:00:21 +0100 |
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committer | Mark Brown <broonie@kernel.org> | 2020-11-03 13:19:46 +0000 |
commit | e6ff10f24c587c1af705b898761e5df615fb0e1a (patch) | |
tree | a4d4c882e6a32fea7a00fcb0277c5f1ff653628f /drivers/regulator | |
parent | d73e873bcfff86b0de7dae2610131b50a2970f88 (diff) | |
download | linux-e6ff10f24c587c1af705b898761e5df615fb0e1a.tar.gz linux-e6ff10f24c587c1af705b898761e5df615fb0e1a.tar.bz2 linux-e6ff10f24c587c1af705b898761e5df615fb0e1a.zip |
regulator: Add support for DA9121 regulator
Add support for the Dialog Semiconductor DA9121, a single-channel
dual-phase buck converter controlled via I2C.
Signed-off-by: Vincent Whitchurch <vincent.whitchurch@axis.com>
Link: https://lore.kernel.org/r/20201103100021.19603-3-vincent.whitchurch@axis.com
Signed-off-by: Mark Brown <broonie@kernel.org>
Diffstat (limited to 'drivers/regulator')
-rw-r--r-- | drivers/regulator/Kconfig | 12 | ||||
-rw-r--r-- | drivers/regulator/Makefile | 1 | ||||
-rw-r--r-- | drivers/regulator/da9121-regulator.c | 108 |
3 files changed, 121 insertions, 0 deletions
diff --git a/drivers/regulator/Kconfig b/drivers/regulator/Kconfig index 020a00d6696b..005a6036dd38 100644 --- a/drivers/regulator/Kconfig +++ b/drivers/regulator/Kconfig @@ -303,6 +303,18 @@ config REGULATOR_DA9063 This driver can also be built as a module. If so, the module will be called da9063-regulator. +config REGULATOR_DA9121 + tristate "Dialog Semiconductor DA9121 regulator" + depends on I2C && OF + select REGMAP_I2C + help + Say y here to support for the Dialog Semiconductor DA9121. The + DA9210 is a dual-phase buck converter controlled through an I2C + interface. + + This driver can also be built as a module. If so, the module + will be called da9121-regulator. + config REGULATOR_DA9210 tristate "Dialog Semiconductor DA9210 regulator" depends on I2C diff --git a/drivers/regulator/Makefile b/drivers/regulator/Makefile index 6ebae516258e..6096862a1d60 100644 --- a/drivers/regulator/Makefile +++ b/drivers/regulator/Makefile @@ -38,6 +38,7 @@ obj-$(CONFIG_REGULATOR_DA9052) += da9052-regulator.o obj-$(CONFIG_REGULATOR_DA9055) += da9055-regulator.o obj-$(CONFIG_REGULATOR_DA9062) += da9062-regulator.o obj-$(CONFIG_REGULATOR_DA9063) += da9063-regulator.o +obj-$(CONFIG_REGULATOR_DA9121) += da9121-regulator.o obj-$(CONFIG_REGULATOR_DA9210) += da9210-regulator.o obj-$(CONFIG_REGULATOR_DA9211) += da9211-regulator.o obj-$(CONFIG_REGULATOR_DBX500_PRCMU) += dbx500-prcmu.o diff --git a/drivers/regulator/da9121-regulator.c b/drivers/regulator/da9121-regulator.c new file mode 100644 index 000000000000..66bdfd1979c0 --- /dev/null +++ b/drivers/regulator/da9121-regulator.c @@ -0,0 +1,108 @@ +// SPDX-License-Identifier: GPL-2.0-only +/* Copyright (C) 2020 Axis Communications AB */ + +#include <linux/of_device.h> +#include <linux/regulator/of_regulator.h> +#include <linux/regulator/machine.h> +#include <linux/regulator/driver.h> +#include <linux/module.h> +#include <linux/regmap.h> +#include <linux/err.h> +#include <linux/i2c.h> + +#define DA9121_BUCK_BUCK1_0 0x20 +#define DA9121_BUCK_BUCK1_0_CH1_EN BIT(0) + +#define DA9121_BUCK_BUCK1_5 0x25 +#define DA9121_BUCK_BUCK1_5_CH1_A_VOUT GENMASK(7, 0) + +#define DA9121_MIN_MV 300 +#define DA9121_MAX_MV 1900 +#define DA9121_STEP_MV 10 +#define DA9121_MIN_SEL (DA9121_MIN_MV / DA9121_STEP_MV) +#define DA9121_N_VOLTAGES (((DA9121_MAX_MV - DA9121_MIN_MV) / DA9121_STEP_MV) \ + + 1 + DA9121_MIN_SEL) + +static const struct regmap_config da9121_regmap_config = { + .reg_bits = 8, + .val_bits = 8, +}; + +static const struct regulator_ops da9121_buck_ops = { + .enable = regulator_enable_regmap, + .disable = regulator_disable_regmap, + .is_enabled = regulator_is_enabled_regmap, + .set_voltage_sel = regulator_set_voltage_sel_regmap, + .get_voltage_sel = regulator_get_voltage_sel_regmap, + .list_voltage = regulator_list_voltage_linear, +}; + +static const struct regulator_desc da9121_reg = { + .name = "da9121", + .of_match = "buck1", + .owner = THIS_MODULE, + .ops = &da9121_buck_ops, + .type = REGULATOR_VOLTAGE, + .n_voltages = DA9121_N_VOLTAGES, + .min_uV = DA9121_MIN_MV * 1000, + .uV_step = DA9121_STEP_MV * 1000, + .linear_min_sel = DA9121_MIN_SEL, + .vsel_reg = DA9121_BUCK_BUCK1_5, + .vsel_mask = DA9121_BUCK_BUCK1_5_CH1_A_VOUT, + .enable_reg = DA9121_BUCK_BUCK1_0, + .enable_mask = DA9121_BUCK_BUCK1_0_CH1_EN, + /* Default value of BUCK_BUCK1_0.CH1_SRC_DVC_UP */ + .ramp_delay = 20000, + /* tBUCK_EN */ + .enable_time = 20, +}; + +static const struct of_device_id da9121_dt_ids[] = { + { .compatible = "dlg,da9121", }, + { } +}; +MODULE_DEVICE_TABLE(of, da9121_dt_ids); + +static int da9121_i2c_probe(struct i2c_client *i2c, + const struct i2c_device_id *id) +{ + struct device *dev = &i2c->dev; + struct regulator_config config = {}; + struct regulator_dev *rdev; + struct regmap *regmap; + + regmap = devm_regmap_init_i2c(i2c, &da9121_regmap_config); + if (IS_ERR(regmap)) + return PTR_ERR(regmap); + + config.dev = &i2c->dev; + config.of_node = dev->of_node; + config.regmap = regmap; + + rdev = devm_regulator_register(&i2c->dev, &da9121_reg, &config); + if (IS_ERR(rdev)) { + dev_err(&i2c->dev, "Failed to register da9121 regulator\n"); + return PTR_ERR(rdev); + } + + return 0; +} + +static const struct i2c_device_id da9121_i2c_id[] = { + { "da9121", 0 }, + {}, +}; +MODULE_DEVICE_TABLE(i2c, da9121_i2c_id); + +static struct i2c_driver da9121_regulator_driver = { + .driver = { + .name = "da9121", + .of_match_table = of_match_ptr(da9121_dt_ids), + }, + .probe = da9121_i2c_probe, + .id_table = da9121_i2c_id, +}; + +module_i2c_driver(da9121_regulator_driver); + +MODULE_LICENSE("GPL v2"); |