diff options
| author | Svyatoslav Ryhel <clamor95@gmail.com> | 2024-10-06 16:51:21 +0300 |
|---|---|---|
| committer | Svyatoslav Ryhel <clamor95@gmail.com> | 2025-05-08 08:30:53 +0300 |
| commit | 5f3588a94d219818c1b3a2dac4d063f77f48a5ef (patch) | |
| tree | 7d3ce8934615f4aec5092377d75c62acda0b6196 /drivers | |
| parent | 5204a362b8c80049e5242d92994637b3bac94d14 (diff) | |
sysreset: implement MAX9807 sysreset functions
MAX8907 PMIC has embedded poweroff function used by some device to initiane
device power off. Implement it as optional sysreset driver guarded by
kconfig option and system-power-controller device tree property.
Tested-by: Ion Agorria <ion@agorria.com>
Signed-off-by: Svyatoslav Ryhel <clamor95@gmail.com>
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/power/pmic/max8907.c | 14 | ||||
| -rw-r--r-- | drivers/sysreset/Kconfig | 7 | ||||
| -rw-r--r-- | drivers/sysreset/Makefile | 1 | ||||
| -rw-r--r-- | drivers/sysreset/sysreset_max8907.c | 37 |
4 files changed, 58 insertions, 1 deletions
diff --git a/drivers/power/pmic/max8907.c b/drivers/power/pmic/max8907.c index 5d35957bf40..a7ef70177de 100644 --- a/drivers/power/pmic/max8907.c +++ b/drivers/power/pmic/max8907.c @@ -45,7 +45,19 @@ static int max8907_read(struct udevice *dev, uint reg, uint8_t *buff, int len) static int max8907_bind(struct udevice *dev) { ofnode regulators_node; - int children; + int children, ret; + + if (IS_ENABLED(CONFIG_SYSRESET_MAX8907) && + dev_read_bool(dev, "maxim,system-power-controller")) { + ret = device_bind_driver_to_node(dev, MAX8907_RST_DRIVER, + "sysreset", dev_ofnode(dev), + NULL); + if (ret) { + log_debug("%s: cannot bind SYSRESET (ret = %d)\n", + __func__, ret); + return ret; + } + } regulators_node = dev_read_subnode(dev, "regulators"); if (!ofnode_valid(regulators_node)) { diff --git a/drivers/sysreset/Kconfig b/drivers/sysreset/Kconfig index 4972905482a..aa83073c96a 100644 --- a/drivers/sysreset/Kconfig +++ b/drivers/sysreset/Kconfig @@ -131,6 +131,13 @@ config SYSRESET_MAX77663 help Enable system power management functions found in MAX77663 PMIC. +config SYSRESET_MAX8907 + bool "Enable support for MAX8907 PMIC System Reset" + depends on DM_PMIC_MAX8907 + select SYSRESET_CMD_POWEROFF if CMD_POWEROFF + help + Enable system power management functions found in MAX8907 PMIC. + config SYSRESET_MICROBLAZE bool "Enable support for Microblaze soft reset" depends on MICROBLAZE diff --git a/drivers/sysreset/Makefile b/drivers/sysreset/Makefile index ded91a4d325..f5c78b25896 100644 --- a/drivers/sysreset/Makefile +++ b/drivers/sysreset/Makefile @@ -11,6 +11,7 @@ obj-$(CONFIG_SYSRESET_CV1800B) += sysreset_cv1800b.o obj-$(CONFIG_$(PHASE_)POWEROFF_GPIO) += poweroff_gpio.o obj-$(CONFIG_$(PHASE_)SYSRESET_GPIO) += sysreset_gpio.o obj-$(CONFIG_$(PHASE_)SYSRESET_MAX77663) += sysreset_max77663.o +obj-$(CONFIG_$(PHASE_)SYSRESET_MAX8907) += sysreset_max8907.o obj-$(CONFIG_SYSRESET_MPC83XX) += sysreset_mpc83xx.o obj-$(CONFIG_SYSRESET_MICROBLAZE) += sysreset_microblaze.o obj-$(CONFIG_SYSRESET_OCTEON) += sysreset_octeon.o diff --git a/drivers/sysreset/sysreset_max8907.c b/drivers/sysreset/sysreset_max8907.c new file mode 100644 index 00000000000..6f62af9bffe --- /dev/null +++ b/drivers/sysreset/sysreset_max8907.c @@ -0,0 +1,37 @@ +// SPDX-License-Identifier: GPL-2.0+ +/* + * Copyright(C) 2024 Svyatoslav Ryhel <clamor95@gmail.com> + */ + +#include <dm.h> +#include <i2c.h> +#include <errno.h> +#include <sysreset.h> +#include <power/pmic.h> +#include <power/max8907.h> + +static int max8907_sysreset_request(struct udevice *dev, enum sysreset_t type) +{ + switch (type) { + case SYSRESET_POWER: + case SYSRESET_POWER_OFF: + /* MAX8907: PWR_OFF > RESET_CNFG */ + pmic_clrsetbits(dev->parent, MAX8907_REG_RESET_CNFG, + MASK_POWER_OFF, MASK_POWER_OFF); + break; + default: + return -EPROTONOSUPPORT; + } + + return -EINPROGRESS; +} + +static struct sysreset_ops max8907_sysreset = { + .request = max8907_sysreset_request, +}; + +U_BOOT_DRIVER(sysreset_max8907) = { + .id = UCLASS_SYSRESET, + .name = MAX8907_RST_DRIVER, + .ops = &max8907_sysreset, +}; |