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-rw-r--r--include/linux/suspend.h16
1 files changed, 16 insertions, 0 deletions
diff --git a/include/linux/suspend.h b/include/linux/suspend.h
index 083ffea7ba1..6bbcef22e10 100644
--- a/include/linux/suspend.h
+++ b/include/linux/suspend.h
@@ -92,6 +92,13 @@ typedef int __bitwise suspend_state_t;
* @enter() and @wake(), even if any of them fails. It is executed after
* a failing @prepare.
*
+ * @suspend_again: Returns whether the system should suspend again (true) or
+ * not (false). If the platform wants to poll sensors or execute some
+ * code during suspended without invoking userspace and most of devices,
+ * suspend_again callback is the place assuming that periodic-wakeup or
+ * alarm-wakeup is already setup. This allows to execute some codes while
+ * being kept suspended in the view of userland and devices.
+ *
* @end: Called by the PM core right after resuming devices, to indicate to
* the platform that the system has returned to the working state or
* the transition to the sleep state has been aborted.
@@ -113,6 +120,7 @@ struct platform_suspend_ops {
int (*enter)(suspend_state_t state);
void (*wake)(void);
void (*finish)(void);
+ bool (*suspend_again)(void);
void (*end)(void);
void (*recover)(void);
};
@@ -260,6 +268,14 @@ static inline int hibernate(void) { return -ENOSYS; }
static inline bool system_entering_hibernation(void) { return false; }
#endif /* CONFIG_HIBERNATION */
+/* Hibernation and suspend events */
+#define PM_HIBERNATION_PREPARE 0x0001 /* Going to hibernate */
+#define PM_POST_HIBERNATION 0x0002 /* Hibernation finished */
+#define PM_SUSPEND_PREPARE 0x0003 /* Going to suspend the system */
+#define PM_POST_SUSPEND 0x0004 /* Suspend finished */
+#define PM_RESTORE_PREPARE 0x0005 /* Going to restore a saved image */
+#define PM_POST_RESTORE 0x0006 /* Restore failed */
+
#ifdef CONFIG_PM_SLEEP
void save_processor_state(void);
void restore_processor_state(void);