It's useful to have the reset status of the SoC printed out during reset (e.g. to learn whether the reset was caused by software or a watchdog).
As a first step to implement this, add a get_status method to the sysreset class, which enables the caller to get printable information about the reset status (akin to get_desc in the CPU uclass).
Reviewed-by: Simon Glass sjg@chromium.org Signed-off-by: Mario Six mario.six@gdsys.cc
---
v2 -> v3: No changes
v1 -> v2: New in v2
--- drivers/sysreset/sysreset-uclass.c | 10 ++++++++++ include/sysreset.h | 17 +++++++++++++++++ 2 files changed, 27 insertions(+)
diff --git a/drivers/sysreset/sysreset-uclass.c b/drivers/sysreset/sysreset-uclass.c index 7e06c3c90a7..de0c0aadbd9 100644 --- a/drivers/sysreset/sysreset-uclass.c +++ b/drivers/sysreset/sysreset-uclass.c @@ -24,6 +24,16 @@ int sysreset_request(struct udevice *dev, enum sysreset_t type) return ops->request(dev, type); }
+int sysreset_get_status(struct udevice *dev, char *buf, int size) +{ + struct sysreset_ops *ops = sysreset_get_ops(dev); + + if (!ops->get_status) + return -ENOSYS; + + return ops->get_status(dev, buf, size); +} + int sysreset_walk(enum sysreset_t type) { struct udevice *dev; diff --git a/include/sysreset.h b/include/sysreset.h index 81318bdbf5d..a5c0b74a473 100644 --- a/include/sysreset.h +++ b/include/sysreset.h @@ -28,6 +28,14 @@ struct sysreset_ops { * (in which case this method will not actually return) */ int (*request)(struct udevice *dev, enum sysreset_t type); + /** + * get_status() - get printable reset status information + * + * @buf: Buffer to receive the textual reset information + * @size: Size of the passed buffer + * @return 0 if OK, -ve on error + */ + int (*get_status)(struct udevice *dev, char *buf, int size); };
#define sysreset_get_ops(dev) ((struct sysreset_ops *)(dev)->driver->ops) @@ -41,6 +49,15 @@ struct sysreset_ops { int sysreset_request(struct udevice *dev, enum sysreset_t type);
/** + * get_status() - get printable reset status information + * + * @buf: Buffer to receive the textual reset information + * @size: Size of the passed buffer + * @return 0 if OK, -ve on error + */ +int sysreset_get_status(struct udevice *dev, char *buf, int size); + +/** * sysreset_walk() - cause a system reset * * This works through the available sysreset devices until it finds one that can -- 2.11.0