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authorSimon Glass <sjg@chromium.org>2018-10-01 12:22:46 -0600
committerSimon Glass <sjg@chromium.org>2018-10-09 04:40:27 -0600
commit751fed426f87204517df14de76762461cd2a4203 (patch)
tree97843e594f8276674c09d73665fe376bba040ae3 /include/sysreset.h
parenteb517315a67320e770cf4a100a922e8ae18fa54e (diff)
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 <sjg@chromium.org>
Diffstat (limited to 'include/sysreset.h')
-rw-r--r--include/sysreset.h30
1 files changed, 30 insertions, 0 deletions
diff --git a/include/sysreset.h b/include/sysreset.h
index 343e46f1aa..61295e3fcb 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)
@@ -60,6 +69,14 @@ 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
*
* This works through the available sysreset devices until it finds one that can
@@ -74,6 +91,19 @@ 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
*
* This calls sysreset_walk(). If it returns, indicating that reset is not