TPS65910/TPS65911 PMICs have embedded power control functions used by some device to initiane device power off. Implement it as sysreset driver.
Signed-off-by: Svyatoslav Ryhel clamor95@gmail.com --- drivers/power/pmic/pmic_tps65910_dm.c | 12 +++++- drivers/sysreset/Kconfig | 8 ++++ drivers/sysreset/Makefile | 1 + drivers/sysreset/sysreset_tps65910.c | 55 +++++++++++++++++++++++++++ include/power/tps65910_pmic.h | 7 ++++ 5 files changed, 82 insertions(+), 1 deletion(-) create mode 100644 drivers/sysreset/sysreset_tps65910.c
diff --git a/drivers/power/pmic/pmic_tps65910_dm.c b/drivers/power/pmic/pmic_tps65910_dm.c index ff63c502d0..395c69a428 100644 --- a/drivers/power/pmic/pmic_tps65910_dm.c +++ b/drivers/power/pmic/pmic_tps65910_dm.c @@ -7,6 +7,7 @@ #include <dm.h> #include <i2c.h> #include <log.h> +#include <dm/lists.h> #include <power/pmic.h> #include <power/regulator.h> #include <power/tps65910_pmic.h> @@ -56,9 +57,18 @@ static int pmic_tps65910_read(struct udevice *dev, uint reg, u8 *buffer, static int pmic_tps65910_bind(struct udevice *dev) { ofnode regulators_node; - int children; + int children, ret; int type = dev_get_driver_data(dev);
+ if (IS_ENABLED(CONFIG_SYSRESET_TPS65910)) { + ret = device_bind_driver(dev, TPS65910_RST_DRIVER, + "sysreset", NULL); + if (ret) { + log_err("cannot bind SYSRESET (ret = %d)\n", ret); + return ret; + } + } + regulators_node = dev_read_subnode(dev, "regulators"); if (!ofnode_valid(regulators_node)) { debug("%s regulators subnode not found\n", dev->name); diff --git a/drivers/sysreset/Kconfig b/drivers/sysreset/Kconfig index cdb4ae2bb1..659170d156 100644 --- a/drivers/sysreset/Kconfig +++ b/drivers/sysreset/Kconfig @@ -157,6 +157,14 @@ config SYSRESET_TI_SCI This enables the system reset driver support over TI System Control Interface available on some new TI's SoCs.
+config SYSRESET_TPS65910 + bool "Enable support for TPS65910/TPS65911 PMIC System Reset" + depends on DM_PMIC_TPS65910 + select SYSRESET_CMD_POWEROFF if CMD_POWEROFF + help + Enable system power management functions found in TPS65910/TPS65911 + PMICs. + config SYSRESET_TPS80031 bool "Enable support for TPS80031/TPS80032 PMIC System Reset" depends on DM_PMIC_TPS80031 diff --git a/drivers/sysreset/Makefile b/drivers/sysreset/Makefile index f62db899da..0d96a204a9 100644 --- a/drivers/sysreset/Makefile +++ b/drivers/sysreset/Makefile @@ -19,6 +19,7 @@ obj-$(CONFIG_SYSRESET_SOCFPGA) += sysreset_socfpga.o obj-$(CONFIG_SYSRESET_SOCFPGA_SOC64) += sysreset_socfpga_soc64.o obj-$(CONFIG_SYSRESET_TEGRA) += sysreset_tegra.o obj-$(CONFIG_SYSRESET_TI_SCI) += sysreset-ti-sci.o +obj-$(CONFIG_$(SPL_TPL_)SYSRESET_TPS65910) += sysreset_tps65910.o obj-$(CONFIG_$(SPL_TPL_)SYSRESET_TPS80031) += sysreset_tps80031.o obj-$(CONFIG_SYSRESET_SYSCON) += sysreset_syscon.o obj-$(CONFIG_SYSRESET_WATCHDOG) += sysreset_watchdog.o diff --git a/drivers/sysreset/sysreset_tps65910.c b/drivers/sysreset/sysreset_tps65910.c new file mode 100644 index 0000000000..1a362dea0d --- /dev/null +++ b/drivers/sysreset/sysreset_tps65910.c @@ -0,0 +1,55 @@ +// SPDX-License-Identifier: GPL-2.0+ +/* + * Copyright(C) 2023 Svyatoslav Ryhel clamor95@gmail.com + */ + +#include <common.h> +#include <dm.h> +#include <i2c.h> +#include <errno.h> +#include <sysreset.h> +#include <power/pmic.h> +#include <power/tps65910_pmic.h> + +static int tps65910_sysreset_request(struct udevice *dev, + enum sysreset_t type) +{ + int val; + + val = pmic_reg_read(dev->parent, TPS65910_REG_DEVICE_CTRL); + if (val < 0) + return val; + + /* define power-off to be sequential */ + val |= PWR_OFF_SEQ; + pmic_reg_write(dev->parent, TPS65910_REG_DEVICE_CTRL, val); + + val &= ~DEV_ON; + + switch (type) { + case SYSRESET_POWER: + /* TPS65910: DEV_OFF_RST > DEVICE_CTRL */ + pmic_reg_write(dev->parent, TPS65910_REG_DEVICE_CTRL, + val | DEV_OFF_RST); + break; + case SYSRESET_POWER_OFF: + /* TPS65910: DEV_OFF > DEVICE_CTRL */ + pmic_reg_write(dev->parent, TPS65910_REG_DEVICE_CTRL, + val | DEV_OFF); + break; + default: + return -EPROTONOSUPPORT; + } + + return -EINPROGRESS; +} + +static struct sysreset_ops tps65910_sysreset = { + .request = tps65910_sysreset_request, +}; + +U_BOOT_DRIVER(sysreset_tps65910) = { + .id = UCLASS_SYSRESET, + .name = TPS65910_RST_DRIVER, + .ops = &tps65910_sysreset, +}; diff --git a/include/power/tps65910_pmic.h b/include/power/tps65910_pmic.h index 10fe02b81a..f7b1b63b3c 100644 --- a/include/power/tps65910_pmic.h +++ b/include/power/tps65910_pmic.h @@ -20,6 +20,12 @@ #define TPS65910_SUPPLY_STATE_OFF 0x0 #define TPS65910_SUPPLY_STATE_ON 0x1
+/* TPS65910 DEVICE_CTRL bits */ +#define PWR_OFF_SEQ BIT(7) +#define DEV_OFF_RST BIT(3) +#define DEV_ON BIT(2) +#define DEV_OFF BIT(0) + /* i2c registers */ enum { TPS65910_REG_RTC_SEC = 0x00, @@ -128,6 +134,7 @@ struct tps65910_regulator_pdata { #define TPS65910_BUCK_DRIVER "tps65910_buck" #define TPS65910_BOOST_DRIVER "tps65910_boost" #define TPS65910_LDO_DRIVER "tps65910_ldo" +#define TPS65910_RST_DRIVER "tps65910_rst"
/* tps65911 i2c registers */ enum {