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sysreset: Add get_status method

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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>
This commit is contained in:
Mario Six
2018-08-06 10:23:32 +02:00
committed by Simon Glass
parent 08f5b0b23a
commit 245f5cda69
2 changed files with 27 additions and 0 deletions
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10
drivers/sysreset/sysreset-uclass.c
View File

@@ -24,6 +24,16 @@ int sysreset_request(struct udevice *dev, enum sysreset_t type)
return ops->request(dev, 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) int sysreset_walk(enum sysreset_t type)
{ {
struct udevice *dev; struct udevice *dev;

17
include/sysreset.h
View File

@@ -28,6 +28,14 @@ struct sysreset_ops {
* (in which case this method will not actually return) * (in which case this method will not actually return)
*/ */
int (*request)(struct udevice *dev, enum sysreset_t type); 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) #define sysreset_get_ops(dev) ((struct sysreset_ops *)(dev)->driver->ops)
@@ -40,6 +48,15 @@ struct sysreset_ops {
*/ */
int sysreset_request(struct udevice *dev, enum sysreset_t type); 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 * sysreset_walk() - cause a system reset
* *