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>
diff --git a/include/sysreset.h b/include/sysreset.h
index 343e46f..61295e3 100644
--- a/include/sysreset.h
+++ b/include/sysreset.h
@@ -11,6 +11,7 @@
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 @@
* @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_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_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