Messages in this thread Patch in this message | | | From | "Rafael J. Wysocki" <> | Subject | [PATCH 5/13] ACPI / PM: Introduce function for refcounting device power resources | Date | Thu, 25 Nov 2010 00:06:55 +0100 |
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From: Rafael J. Wysocki <rjw@sisk.pl>
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 <rjw@sisk.pl> --- drivers/acpi/internal.h | 1 + drivers/acpi/power.c | 8 ++++++++ 2 files changed, 9 insertions(+)
Index: linux-2.6/drivers/acpi/power.c =================================================================== --- linux-2.6.orig/drivers/acpi/power.c +++ linux-2.6/drivers/acpi/power.c @@ -485,6 +485,14 @@ int acpi_power_get_inferred_state(struct 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; Index: linux-2.6/drivers/acpi/internal.h =================================================================== --- linux-2.6.orig/drivers/acpi/internal.h +++ linux-2.6/drivers/acpi/internal.h @@ -42,6 +42,7 @@ int acpi_power_init(void); int acpi_device_sleep_wake(struct acpi_device *dev, int enable, int sleep_state, int dev_state); int acpi_power_get_inferred_state(struct acpi_device *device, int *state); +int acpi_power_on_resources(struct acpi_device *device, int state); int acpi_power_transition(struct acpi_device *device, int state); extern int acpi_power_nocheck;
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