From 30d3df41b32b1ea63d3ebc52ef5644cbe41520f4 Mon Sep 17 00:00:00 2001 From: "Rafael J. Wysocki" Date: Thu, 25 Nov 2010 00:06:55 +0100 Subject: ACPI / PM: Introduce function for refcounting device power resources Introduce function acpi_power_on_resources() that reference counts and possibly turns on ACPI power resources for a given device and a given power state of it. This function will be used for reference counting device power resources during initialization. Signed-off-by: Rafael J. Wysocki Signed-off-by: Len Brown --- drivers/acpi/power.c | 8 ++++++++ 1 file changed, 8 insertions(+) (limited to 'drivers/acpi/power.c') diff --git a/drivers/acpi/power.c b/drivers/acpi/power.c index 95fedbdf4fb..0cb4eab50d7 100644 --- a/drivers/acpi/power.c +++ b/drivers/acpi/power.c @@ -485,6 +485,14 @@ int acpi_power_get_inferred_state(struct acpi_device *device, int *state) return 0; } +int acpi_power_on_resources(struct acpi_device *device, int state) +{ + if (!device || state < ACPI_STATE_D0 || state > ACPI_STATE_D3) + return -EINVAL; + + return acpi_power_on_list(&device->power.states[state].resources); +} + int acpi_power_transition(struct acpi_device *device, int state) { int result; -- cgit v1.2.3