Add support to bind the regulators/child nodes with the pmic.
Signed-off-by: Keerthy j-keerthy@ti.com ---
Changes in v2:
* Added pmic read/write functions.
drivers/power/pmic/Kconfig | 7 ++++ drivers/power/pmic/Makefile | 1 + drivers/power/pmic/lp873x.c | 90 +++++++++++++++++++++++++++++++++++++++++++++ include/power/lp873x.h | 19 ++++++++++ 4 files changed, 117 insertions(+) create mode 100644 drivers/power/pmic/lp873x.c create mode 100644 include/power/lp873x.h
diff --git a/drivers/power/pmic/Kconfig b/drivers/power/pmic/Kconfig index 92931c5..00fcacb 100644 --- a/drivers/power/pmic/Kconfig +++ b/drivers/power/pmic/Kconfig @@ -142,3 +142,10 @@ config PMIC_PALMAS ---help--- The PALMAS is a PMIC containing several LDOs, SMPS. This driver binds the pmic children. + +config PMIC_LP873X + bool "Enable driver for Texas Instruments LP873X PMIC" + depends on DM_PMIC + ---help--- + The LP873X is a PMIC containing couple of LDOs and couple of SMPS. + This driver binds the pmic children. diff --git a/drivers/power/pmic/Makefile b/drivers/power/pmic/Makefile index 828c0cf..334a24f 100644 --- a/drivers/power/pmic/Makefile +++ b/drivers/power/pmic/Makefile @@ -16,6 +16,7 @@ obj-$(CONFIG_PMIC_RK808) += rk808.o obj-$(CONFIG_PMIC_TPS65090) += tps65090.o obj-$(CONFIG_PMIC_S5M8767) += s5m8767.o obj-$(CONFIG_$(SPL_)PMIC_PALMAS) += palmas.o +obj-$(CONFIG_$(SPL_)PMIC_LP873X) += lp873x.o
obj-$(CONFIG_POWER_LTC3676) += pmic_ltc3676.o obj-$(CONFIG_POWER_MAX77696) += pmic_max77696.o diff --git a/drivers/power/pmic/lp873x.c b/drivers/power/pmic/lp873x.c new file mode 100644 index 0000000..b727b8b --- /dev/null +++ b/drivers/power/pmic/lp873x.c @@ -0,0 +1,90 @@ +/* + * (C) Copyright 2016 Texas Instruments Incorporated, <www.ti.com> + * Keerthy j-keerthy@ti.com + * + * SPDX-License-Identifier: GPL-2.0+ + */ + +#include <common.h> +#include <fdtdec.h> +#include <errno.h> +#include <dm.h> +#include <i2c.h> +#include <power/pmic.h> +#include <power/regulator.h> +#include <power/lp873x.h> +#include <dm/device.h> + +DECLARE_GLOBAL_DATA_PTR; + +static const struct pmic_child_info pmic_children_info[] = { + { .prefix = "ldo", .driver = LP873X_LDO_DRIVER }, + { .prefix = "buck", .driver = LP873X_BUCK_DRIVER }, + { }, +}; + +static int lp873x_write(struct udevice *dev, uint reg, const uint8_t *buff, + int len) +{ + if (dm_i2c_reg_write(dev, reg, *buff)) { + error("write error to device: %p register: %#x!", dev, reg); + return -EIO; + } + + return 0; +} + +static int lp873x_read(struct udevice *dev, uint reg, uint8_t *buff, int len) +{ + int ret; + + ret = dm_i2c_reg_read(dev, reg); + if (ret < 0) { + error("read error %d from device: %p register: %#x!", ret, dev, + reg); + return -EIO; + } + + return ret; +} + +static int lp873x_bind(struct udevice *dev) +{ + int regulators_node; + const void *blob = gd->fdt_blob; + int children; + int node = dev->of_offset; + + regulators_node = fdt_subnode_offset(blob, node, "regulators"); + + if (regulators_node <= 0) { + printf("%s: %s reg subnode not found!", __func__, dev->name); + return -ENXIO; + } + + children = pmic_bind_children(dev, regulators_node, pmic_children_info); + if (!children) + printf("%s: %s - no child found\n", __func__, dev->name); + + /* Always return success for this device */ + return 0; +} + +static struct dm_pmic_ops lp873x_ops = { + .read = lp873x_read, + .write = lp873x_write, +}; + +static const struct udevice_id lp873x_ids[] = { + { .compatible = "ti,lp8732", .data = LP8732 }, + { .compatible = "ti,lp8733" , .data = LP8733 }, + { } +}; + +U_BOOT_DRIVER(pmic_lp873x) = { + .name = "lp873x_pmic", + .id = UCLASS_PMIC, + .of_match = lp873x_ids, + .bind = lp873x_bind, + .ops = &lp873x_ops, +}; diff --git a/include/power/lp873x.h b/include/power/lp873x.h new file mode 100644 index 0000000..e0c0711 --- /dev/null +++ b/include/power/lp873x.h @@ -0,0 +1,19 @@ +#define LP8732 0x0 +#define LP8733 0x1 + +#define LP873X_LDO_NUM 2 +#define LP873X_BUCK_NUM 2 + +/* Drivers name */ +#define LP873X_LDO_DRIVER "lp873x_ldo" +#define LP873X_BUCK_DRIVER "lp873x_buck" + +#define LP873X_BUCK_VOLT_MASK 0xFF +#define LP873X_BUCK_VOLT_MAX_HEX 0xFF +#define LP873X_BUCK_VOLT_MAX 3360000 +#define LP873X_BUCK_MODE_MASK 0x1 + +#define LP873X_LDO_VOLT_MASK 0x1F +#define LP873X_LDO_VOLT_MAX_HEX 0x19 +#define LP873X_LDO_VOLT_MAX 3300000 +#define LP873X_LDO_MODE_MASK 0x1