From 751fed426f87204517df14de76762461cd2a4203 Mon Sep 17 00:00:00 2001 From: Simon Glass Date: Mon, 1 Oct 2018 12:22:46 -0600 Subject: sysreset: Add a way to find the last reset We have a method to return the last reset as a string for humans, but not a method that allows it to be used programmatically. Add a new method that returns the last reset as an enum. Signed-off-by: Simon Glass --- include/sysreset.h | 30 ++++++++++++++++++++++++++++++ 1 file changed, 30 insertions(+) (limited to 'include') diff --git a/include/sysreset.h b/include/sysreset.h index 343e46f1aa5..61295e3fcbb 100644 --- a/include/sysreset.h +++ b/include/sysreset.h @@ -11,6 +11,7 @@ enum sysreset_t { SYSRESET_WARM, /* Reset CPU, keep GPIOs active */ SYSRESET_COLD, /* Reset CPU and GPIOs */ SYSRESET_POWER, /* Reset PMIC (remove and restore power) */ + SYSRESET_POWER_OFF, /* Turn off power */ SYSRESET_COUNT, }; @@ -37,6 +38,14 @@ struct sysreset_ops { * @return 0 if OK, -ve on error */ int (*get_status)(struct udevice *dev, char *buf, int size); + + /** + * get_last() - get information on the last reset + * + * @dev: Device to check + * @return last reset state (enum sysreset_t) or -ve error + */ + int (*get_last)(struct udevice *dev); }; #define sysreset_get_ops(dev) ((struct sysreset_ops *)(dev)->driver->ops) @@ -59,6 +68,14 @@ int sysreset_request(struct udevice *dev, enum sysreset_t type); */ int sysreset_get_status(struct udevice *dev, char *buf, int size); +/** + * sysreset_get_last() - get information on the last reset + * + * @dev: Device to check + * @return last reset state (enum sysreset_t) or -ve error + */ +int sysreset_get_last(struct udevice *dev); + /** * sysreset_walk() - cause a system reset * @@ -73,6 +90,19 @@ int sysreset_get_status(struct udevice *dev, char *buf, int size); */ int sysreset_walk(enum sysreset_t type); +/** + * sysreset_get_last_walk() - get information on the last reset + * + * This works through the available sysreset devices until it finds one that can + * perform a reset. If the provided sysreset type is not available, the next one + * will be tried. + * + * If no device prives the information, this function returns -ENOENT + * + * @return last reset state (enum sysreset_t) or -ve error + */ +int sysreset_get_last_walk(void); + /** * sysreset_walk_halt() - try to reset, otherwise halt * -- cgit v1.2.3