From: Tero Kristo t-kristo@ti.com
TPS6236x is a family of step down DC-DC converters optimized for battery powered portable applications for a small solution size. Add a regulator driver for supporting these devices.
Signed-off-by: Tero Kristo t-kristo@ti.com Signed-off-by: Keerthy j-keerthy@ti.com --- drivers/power/regulator/Kconfig | 10 ++ drivers/power/regulator/Makefile | 1 + drivers/power/regulator/tps62360_regulator.c | 123 +++++++++++++++++++ 3 files changed, 134 insertions(+) create mode 100644 drivers/power/regulator/tps62360_regulator.c
diff --git a/drivers/power/regulator/Kconfig b/drivers/power/regulator/Kconfig index 9aa00fad42..56d68ee40e 100644 --- a/drivers/power/regulator/Kconfig +++ b/drivers/power/regulator/Kconfig @@ -273,6 +273,16 @@ config DM_REGULATOR_TPS65910 regulator types of the TPS65910 (BUCK, BOOST and LDO). It implements the get/set api for value and enable.
+config DM_REGULATOR_TPS62360 + bool "Enable driver for TPS6236x Power Regulator" + depends on DM_REGULATOR + help + The TPS6236X DC/DC step down converter provides a single output + power line peaking at 3A current. This driver supports all four + variants of the chip (TPS62360, TPS62361, TPS62362, TPS62363). It + implements the get/set api for value only, as the power line is + always on. + config DM_REGULATOR_STPMIC1 bool "Enable driver for STPMIC1 regulators" depends on DM_REGULATOR && PMIC_STPMIC1 diff --git a/drivers/power/regulator/Makefile b/drivers/power/regulator/Makefile index 6a3d4bbee4..9198841b4f 100644 --- a/drivers/power/regulator/Makefile +++ b/drivers/power/regulator/Makefile @@ -26,4 +26,5 @@ obj-$(CONFIG_$(SPL_)DM_REGULATOR_LP873X) += lp873x_regulator.o obj-$(CONFIG_$(SPL_)DM_REGULATOR_LP87565) += lp87565_regulator.o obj-$(CONFIG_$(SPL_)DM_REGULATOR_STM32_VREFBUF) += stm32-vrefbuf.o obj-$(CONFIG_DM_REGULATOR_TPS65910) += tps65910_regulator.o +obj-$(CONFIG_DM_REGULATOR_TPS62360) += tps62360_regulator.o obj-$(CONFIG_$(SPL_)DM_REGULATOR_STPMIC1) += stpmic1.o diff --git a/drivers/power/regulator/tps62360_regulator.c b/drivers/power/regulator/tps62360_regulator.c new file mode 100644 index 0000000000..3b123f503c --- /dev/null +++ b/drivers/power/regulator/tps62360_regulator.c @@ -0,0 +1,123 @@ +// SPDX-License-Identifier: GPL-2.0+ +/* + * Copyright (C) 2019 Texas Instruments Incorporated - http://www.ti.com/ + * Tero Kristo t-kristo@ti.com + */ + +#include <common.h> +#include <dm.h> +#include <i2c.h> +#include <power/regulator.h> + +#define TPS62360_REG_SET0 0 + +#define TPS62360_I2C_CHIP 0x60 + +#define TPS62360_VSEL_STEPSIZE 10000 /* In uV */ + +struct tps62360_regulator_config { + u32 vmin; + u32 vmax; +}; + +struct tps62360_regulator_pdata { + u8 vsel_offset; + struct udevice *i2c; + struct tps62360_regulator_config *config; +}; + +/* + * TPS62362/TPS62363 are just re-using these values for now, their preset + * voltage values are just different compared to TPS62360/TPS62361. + */ +static struct tps62360_regulator_config tps62360_data = { + .vmin = 770000, + .vmax = 1400000, +}; + +static struct tps62360_regulator_config tps62361_data = { + .vmin = 500000, + .vmax = 1770000, +}; + +static int tps62360_regulator_set_value(struct udevice *dev, int uV) +{ + struct tps62360_regulator_pdata *pdata = dev_get_platdata(dev); + u8 regval; + + if (uV < pdata->config->vmin || uV > pdata->config->vmax) + return -EINVAL; + + uV -= pdata->config->vmin; + + uV = DIV_ROUND_UP(uV, TPS62360_VSEL_STEPSIZE); + + if (uV > U8_MAX) + return -EINVAL; + + regval = (u8)uV; + + return dm_i2c_write(pdata->i2c, TPS62360_REG_SET0 + pdata->vsel_offset, + ®val, 1); +} + +static int tps62360_regulator_get_value(struct udevice *dev) +{ + u8 regval; + int ret; + struct tps62360_regulator_pdata *pdata = dev_get_platdata(dev); + + ret = dm_i2c_read(pdata->i2c, TPS62360_REG_SET0 + pdata->vsel_offset, + ®val, 1); + if (ret) { + dev_err(dev, "i2c read failed: %d\n", ret); + return ret; + } + + return (u32)regval * TPS62360_VSEL_STEPSIZE + pdata->config->vmin; +} + +static int tps62360_regulator_ofdata_to_platdata(struct udevice *dev) +{ + struct tps62360_regulator_pdata *pdata = dev_get_platdata(dev); + u8 vsel0; + u8 vsel1; + int ret; + + pdata->config = (void *)dev_get_driver_data(dev); + + vsel0 = dev_read_bool(dev, "ti,vsel0-state-high"); + vsel1 = dev_read_bool(dev, "ti,vsel1-state-high"); + + pdata->vsel_offset = vsel0 + vsel1 * 2; + + ret = i2c_get_chip(dev->parent, TPS62360_I2C_CHIP, 1, &pdata->i2c); + if (ret) { + dev_err(dev, "i2c dev get failed.\n"); + return ret; + } + + return 0; +} + +static const struct dm_regulator_ops tps62360_regulator_ops = { + .get_value = tps62360_regulator_get_value, + .set_value = tps62360_regulator_set_value, +}; + +static const struct udevice_id tps62360_regulator_ids[] = { + { .compatible = "ti,tps62360", .data = (ulong)&tps62360_data }, + { .compatible = "ti,tps62361", .data = (ulong)&tps62361_data }, + { .compatible = "ti,tps62362", .data = (ulong)&tps62360_data }, + { .compatible = "ti,tps62363", .data = (ulong)&tps62361_data }, + { }, +}; + +U_BOOT_DRIVER(tps62360_regulator) = { + .name = "tps62360_regulator", + .id = UCLASS_REGULATOR, + .ops = &tps62360_regulator_ops, + .of_match = tps62360_regulator_ids, + .platdata_auto_alloc_size = sizeof(struct tps62360_regulator_pdata), + .ofdata_to_platdata = tps62360_regulator_ofdata_to_platdata, +};