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authorRafael J. Wysocki <rjw@sisk.pl>2007-07-29 23:27:18 +0200
committerLinus Torvalds <torvalds@woody.linux-foundation.org>2007-07-29 16:45:38 -0700
commit296699de6bdc717189a331ab6bbe90e05c94db06 (patch)
tree53c847ecc8cce11952502921844052e44ca60d5e /include/acpi
parentb0cb1a19d05b8ea8611a9ef48a17fe417f1832e6 (diff)
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Introduce CONFIG_SUSPEND for suspend-to-Ram and standby
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>
Diffstat (limited to 'include/acpi')
-rw-r--r--include/acpi/acpi_bus.h9
-rw-r--r--include/acpi/acpi_drivers.h4
2 files changed, 13 insertions, 0 deletions
diff --git a/include/acpi/acpi_bus.h b/include/acpi/acpi_bus.h
index 533ef40..3d0fea2 100644
--- a/include/acpi/acpi_bus.h
+++ b/include/acpi/acpi_bus.h
@@ -366,7 +366,16 @@ acpi_handle acpi_get_child(acpi_handle, acpi_integer);
acpi_handle acpi_get_pci_rootbridge_handle(unsigned int, unsigned int);
#define DEVICE_ACPI_HANDLE(dev) ((acpi_handle)((dev)->archdata.acpi_handle))
+#ifdef CONFIG_PM_SLEEP
int acpi_pm_device_sleep_state(struct device *, int, int *);
+#else /* !CONFIG_PM_SLEEP */
+static inline int acpi_pm_device_sleep_state(struct device *d, int w, int *p)
+{
+ if (p)
+ *p = ACPI_STATE_D0;
+ return ACPI_STATE_D3;
+}
+#endif /* !CONFIG_PM_SLEEP */
#endif /* CONFIG_ACPI */
diff --git a/include/acpi/acpi_drivers.h b/include/acpi/acpi_drivers.h
index f85f77a..777d37a 100644
--- a/include/acpi/acpi_drivers.h
+++ b/include/acpi/acpi_drivers.h
@@ -147,6 +147,10 @@ static inline void unregister_hotplug_dock_device(acpi_handle handle)
/*--------------------------------------------------------------------------
Suspend/Resume
-------------------------------------------------------------------------- */
+#ifdef CONFIG_PM_SLEEP
extern int acpi_sleep_init(void);
+#else
+static inline int acpi_sleep_init(void) { return 0; }
+#endif
#endif /*__ACPI_DRIVERS_H__*/