This adds infrastructure for DM based poweroff drivers including a generic poweroff command, that is exposed via existing CONFIG_CMD_POWEROFF and uses the first registered poweroff driver.
Signed-off-by: Sebastian Reichel sebastian.reichel@collabora.com --- drivers/power/Kconfig | 9 +++++++ drivers/power/Makefile | 2 ++ drivers/power/poweroff-uclass.c | 43 +++++++++++++++++++++++++++++++++ include/dm/uclass-id.h | 1 + include/power/poweroff.h | 32 ++++++++++++++++++++++++ 5 files changed, 87 insertions(+) create mode 100644 drivers/power/poweroff-uclass.c create mode 100644 include/power/poweroff.h
diff --git a/drivers/power/Kconfig b/drivers/power/Kconfig index 5910926faca4..5a76e23b5fb0 100644 --- a/drivers/power/Kconfig +++ b/drivers/power/Kconfig @@ -373,4 +373,13 @@ config POWER_MT6323 This adds poweroff driver for mt6323 this pmic is used on mt7623 / Bananapi R2
+config POWEROFF + bool "power-off support" + depends on DM + help + Most boards have support to power-off themself. U-Boot provides + a uclass API to implement this feature. Poweroff drivers can + provide access to board-specific implementations. Using device + tree for configuration is recommended. + endmenu diff --git a/drivers/power/Makefile b/drivers/power/Makefile index 2dcc7bb99d02..924e99114ccd 100644 --- a/drivers/power/Makefile +++ b/drivers/power/Makefile @@ -21,3 +21,5 @@ obj-$(CONFIG_POWER_FSL) += power_fsl.o obj-$(CONFIG_POWER_I2C) += power_i2c.o obj-$(CONFIG_POWER_SPI) += power_spi.o obj-$(CONFIG_POWER_MT6323) += mt6323.o + +obj-$(CONFIG_POWEROFF) += poweroff-uclass.o diff --git a/drivers/power/poweroff-uclass.c b/drivers/power/poweroff-uclass.c new file mode 100644 index 000000000000..c7ffaaca9bee --- /dev/null +++ b/drivers/power/poweroff-uclass.c @@ -0,0 +1,43 @@ +// SPDX-License-Identifier: GPL-2.0+ +/* + * Copyright (c) 2019 Collabora Ltd. + * Copyright (c) 2019 GE Inc. + * + * Written by Sebastian Reichel sebastian.reichel@collabora.com + */ + +#include <command.h> +#include <dm.h> +#include <errno.h> +#include <power/poweroff.h> + +#ifdef CONFIG_CMD_POWEROFF +int do_poweroff(struct cmd_tbl *cmdtp, int flag, int argc, char * const argv[]) +{ + struct udevice *dev; + int ret; + + ret = uclass_get_device(UCLASS_POWEROFF, 0, &dev); + if (ret) { + printf("Could not find poweroff device: %d\n", ret); + return ret; + } + + return dm_poweroff(dev); +} +#endif + +int dm_poweroff(struct udevice *dev) +{ + struct poweroff_ops *ops = poweroff_get_ops(dev); + + if (!ops->poweroff) + return -ENOSYS; + + return ops->poweroff(dev); +} + +UCLASS_DRIVER(poweroff) = { + .id = UCLASS_POWEROFF, + .name = "poweroff", +}; diff --git a/include/dm/uclass-id.h b/include/dm/uclass-id.h index 7837d459f18c..4adc415ffcfe 100644 --- a/include/dm/uclass-id.h +++ b/include/dm/uclass-id.h @@ -84,6 +84,7 @@ enum uclass_id { UCLASS_PINCONFIG, /* Pin configuration node device */ UCLASS_PINCTRL, /* Pinctrl (pin muxing/configuration) device */ UCLASS_PMIC, /* PMIC I/O device */ + UCLASS_POWEROFF, /* Poweroff, e.g. via gpio or a special register */ UCLASS_POWER_DOMAIN, /* (SoC) Power domains */ UCLASS_PWM, /* Pulse-width modulator */ UCLASS_PWRSEQ, /* Power sequence device */ diff --git a/include/power/poweroff.h b/include/power/poweroff.h new file mode 100644 index 000000000000..ffaff24649a6 --- /dev/null +++ b/include/power/poweroff.h @@ -0,0 +1,32 @@ +/* SPDX-License-Identifier: GPL-2.0+ */ +/* + * Copyright (c) 2019 Collabora Ltd. + * Copyright (c) 2019 GE Inc. + * + * Written by Sebastian Reichel sebastian.reichel@collabora.com + */ + +#ifndef __POWEROFF_H +#define __POWEROFF_H + +struct poweroff_ops { + /** + * poweroff() - poweroff the system + * + * @dev: Device used for powering off the system + * @return -ve on error (system is powered off otherwise) + */ + int (*poweroff)(struct udevice *dev); +}; + +#define poweroff_get_ops(dev) ((struct poweroff_ops *)(dev)->driver->ops) + +/** + * dm_poweroff() - Poweroff system via DM poweroff driver + * + * @dev: Device used for powering off the system + * @return -ve on error (system is powered off otherwise) + */ +int dm_poweroff(struct udevice *dev); + +#endif