Re: [PATCH, RFC] [1/3] Generic in-kernel AC status
From: Matthew Garrett <mjg59@srcf.ucam.org>
Date: 2006-02-08 13:04:27
Also in:
linux-acpi, lkml
Subsystem:
hibernation (aka software suspend, aka swsusp), power management core, suspend to ram, the rest · Maintainers:
"Rafael J. Wysocki", Linus Torvalds
Whoops - missing <linux/module.h>. Here's the fixed version. Signed-Off-By: Matthew Garrett <mjg59@srcf.ucam.org>
diff --git a/include/linux/pm.h b/include/linux/pm.h
index 5be87ba..59ece0f 100644
--- a/include/linux/pm.h
+++ b/include/linux/pm.h@@ -129,6 +129,8 @@ struct pm_ops { extern void pm_set_ops(struct pm_ops *); extern struct pm_ops *pm_ops; +extern void pm_set_ac_status(int (*ac_status_function)(void)); +extern int pm_get_ac_status(void); extern int pm_suspend(suspend_state_t state);
diff --git a/kernel/power/main.c b/kernel/power/main.c
index 46110d5..453cd0e 100644
--- a/kernel/power/main.c
+++ b/kernel/power/main.c@@ -15,7 +15,7 @@ #include <linux/errno.h> #include <linux/init.h> #include <linux/pm.h> - +#include <linux/module.h> #include "power.h"
@@ -25,6 +25,7 @@ DECLARE_MUTEX(pm_sem); struct pm_ops *pm_ops = NULL; +int (*get_ac_status)(void); suspend_disk_method_t pm_disk_mode = PM_DISK_SHUTDOWN; /**
@@ -39,6 +40,39 @@ void pm_set_ops(struct pm_ops * ops) up(&pm_sem); } +/** + * pm_set_ac_status - Set the ac status callback + * @ops: Pointer to function + */ + +void pm_set_ac_status(int (*ac_status_function)(void)) +{ + down(&pm_sem); + get_ac_status = ac_status_function; + up(&pm_sem); +} + +EXPORT_SYMBOL(pm_set_ac_status); + +/** + * pm_get_ac_status - return true if the system is on AC + */ + +int pm_get_ac_status(void) +{ + int status; + + down (&pm_sem); + if (get_ac_status) + status = get_ac_status(); + else + status = 0; + up (&pm_sem); + + return status; +} + +EXPORT_SYMBOL(pm_get_ac_status); /** * suspend_prepare - Do prep work before entering low-power state.
--
Matthew Garrett | mjg59@srcf.ucam.org