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Introduce CONFIG_SUSPEND for suspend-to-Ram and standby

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Introduce CONFIG_SUSPEND representing the ability to enter system sleep
states, such as the ACPI S3 state, and allow the user to choose SUSPEND
and HIBERNATION independently of each other.

Make HOTPLUG_CPU be selected automatically if SUSPEND or HIBERNATION has
been chosen and the kernel is intended for SMP systems.

Also, introduce CONFIG_PM_SLEEP which is automatically selected if
CONFIG_SUSPEND or CONFIG_HIBERNATION is set and use it to select the
code needed for both suspend and hibernation.

The top-level power management headers and the ACPI code related to
suspend and hibernation are modified to use the new definitions (the
changes in drivers/acpi/sleep/main.c are, mostly, moving code to reduce
the number of ifdefs).

There are many other files in which CONFIG_PM can be replaced with
CONFIG_PM_SLEEP or even with CONFIG_SUSPEND, but they can be updated in
the future.

Signed-off-by: Rafael J. Wysocki <rjw@sisk.pl>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
Rafael J. Wysocki 2007-07-29 23:27:18 +02:00 • committed by Linus Torvalds
parent b0cb1a19d0
commit 296699de6b
17 changed files with 164 additions and 86 deletions
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15
include/linux/pm.h
View file

@ -165,6 +165,7 @@ struct pm_ops {
int (*finish)(suspend_state_t state);
};
#ifdef CONFIG_SUSPEND
extern struct pm_ops *pm_ops;
/**
@ -193,6 +194,12 @@ extern void arch_suspend_disable_irqs(void);
extern void arch_suspend_enable_irqs(void);
extern int pm_suspend(suspend_state_t state);
#else /* !CONFIG_SUSPEND */
#define suspend_valid_only_mem NULL
static inline void pm_set_ops(struct pm_ops *pm_ops) {}
static inline int pm_suspend(suspend_state_t state) { return -ENOSYS; }
#endif /* !CONFIG_SUSPEND */
/*
* Device power management
@ -266,7 +273,7 @@ typedef struct pm_message {
struct dev_pm_info {
pm_message_t power_state;
unsigned can_wakeup:1;
#ifdef CONFIG_PM
#ifdef CONFIG_PM_SLEEP
unsigned should_wakeup:1;
struct list_head entry;
#endif
@ -276,7 +283,7 @@ extern int device_power_down(pm_message_t state);
extern void device_power_up(void);
extern void device_resume(void);
#ifdef CONFIG_PM
#ifdef CONFIG_PM_SLEEP
extern int device_suspend(pm_message_t state);
extern int device_prepare_suspend(pm_message_t state);
@ -306,7 +313,7 @@ static inline int call_platform_enable_wakeup(struct device *dev, int is_on)
return 0;
}
#else /* !CONFIG_PM */
#else /* !CONFIG_PM_SLEEP */
static inline int device_suspend(pm_message_t state)
{
@ -323,7 +330,7 @@ static inline int call_platform_enable_wakeup(struct device *dev, int is_on)
return 0;
}
#endif
#endif /* !CONFIG_PM_SLEEP */
/* changes to device_may_wakeup take effect on the next pm state change.
* by default, devices should wakeup if they can.