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ACPI: Add acpi_pm_device_sleep_state helper routine

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Based on the David Brownell's patch at
http://marc.info/?l=linux-acpi&m=117873972806360&w=2
updated by: Rafael J. Wysocki <[email protected]>

Add a helper routine returning the lowest power (highest number) ACPI device
power state that given device can be in while the system is in the sleep state
indicated by acpi_target_sleep_state .

Signed-off-by: Rafael J. Wysocki <[email protected]>
Acked-by: Pavel Machek <[email protected]>
Signed-off-by: Len Brown <[email protected]>
This commit is contained in:
Shaohua Li 2007-07-17 22:40:25 +02:00 • committed by Len Brown
commit fd4aff1a28
2 changed files with 77 additions and 0 deletions
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include/acpi/acpi_bus.h
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@ -364,6 +364,8 @@ 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))
int acpi_pm_device_sleep_state(struct device *, int, int *);
#endif /* CONFIG_ACPI */
#endif /*__ACPI_BUS_H__*/