power management: implement pm_ops.valid for everybody

[linux-beck.git] / include / linux / pm.h

diff --git a/include/linux/pm.h b/include/linux/pm.h
index c2a55f94c29afecc040ec744cbd060a13fdb487d..6035209cf31ebca6f1ff3da3a142808604f0979c 100644 (file)
--- a/include/linux/pm.h
+++ b/include/linux/pm.h
@@ -128,6 +128,9 @@ typedef int __bitwise suspend_disk_method_t;
  *     always valid and never passed to this call.
  *     If not assigned, all suspend states are advertised as valid
  *     in /sys/power/state (but can still be rejected by prepare or enter.)
+ *     Since new states can be added for other platforms, you should
+ *     assign this callback. There is a %pm_valid_only_mem function
+ *     available if you only implemented mem sleep.
  *
  * @prepare: Prepare the platform for the given suspend state. Can return a
  *     negative error code if necessary.
@@ -165,6 +168,7 @@ extern void pm_set_ops(struct pm_ops *pm_ops);
 extern struct pm_ops *pm_ops;
 extern int pm_suspend(suspend_state_t state);
 
+extern int pm_valid_only_mem(suspend_state_t state);
 
 /**
  * arch_suspend_disable_irqs - disable IRQs for suspend