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ACPI / PM: Add more run-time wake-up fields

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Use the run_wake flag to mark all devices for which run-time wake-up
events may be generated by the platform.  Introduce a new wake-up
flag, always_enabled, for marking devices that should be permanently
enabled to generate run-time events.  Also, introduce a reference
counter for run-wake devices and a function that will initialize all
of the run-time wake-up fields for given device.

Signed-off-by: Rafael J. Wysocki <rjw@sisk.pl>
Acked-by: Len Brown <len.brown@intel.com>
Signed-off-by: Jesse Barnes <jbarnes@virtuousgeek.org>
This commit is contained in:
Rafael J. Wysocki 2010-02-17 23:41:49 +01:00 committed by Jesse Barnes
parent 9630bdd9b1
commit f517709d65
4 changed files with 33 additions and 11 deletions
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2
drivers/acpi/button.c
View File

@ -425,6 +425,7 @@ static int acpi_button_add(struct acpi_device *device)
acpi_enable_gpe(device->wakeup.gpe_device,
device->wakeup.gpe_number,
ACPI_GPE_TYPE_WAKE_RUN);
device->wakeup.run_wake_count++;
device->wakeup.state.enabled = 1;
}
@ -448,6 +449,7 @@ static int acpi_button_remove(struct acpi_device *device, int type)
acpi_disable_gpe(device->wakeup.gpe_device,
device->wakeup.gpe_number,
ACPI_GPE_TYPE_WAKE_RUN);
device->wakeup.run_wake_count--;
device->wakeup.state.enabled = 0;
}

37
drivers/acpi/scan.c
View File

@ -741,19 +741,39 @@ acpi_bus_extract_wakeup_device_power_package(struct acpi_device *device,
return AE_OK;
}
static int acpi_bus_get_wakeup_device_flags(struct acpi_device *device)
static void acpi_bus_set_run_wake_flags(struct acpi_device *device)
{
acpi_status status = 0;
struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL };
union acpi_object *package = NULL;
int psw_error;
struct acpi_device_id button_device_ids[] = {
{"PNP0C0D", 0},
{"PNP0C0C", 0},
{"PNP0C0E", 0},
{"", 0},
};
acpi_status status;
acpi_event_status event_status;
device->wakeup.run_wake_count = 0;
/* Power button, Lid switch always enable wakeup */
if (!acpi_match_device_ids(device, button_device_ids)) {
device->wakeup.flags.run_wake = 1;
device->wakeup.flags.always_enabled = 1;
return;
}
status = acpi_get_gpe_status(NULL, device->wakeup.gpe_number,
ACPI_NOT_ISR, &event_status);
if (status == AE_OK)
device->wakeup.flags.run_wake =
!!(event_status & ACPI_EVENT_FLAG_HANDLE);
}
static int acpi_bus_get_wakeup_device_flags(struct acpi_device *device)
{
acpi_status status = 0;
struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL };
union acpi_object *package = NULL;
int psw_error;
/* _PRW */
status = acpi_evaluate_object(device->handle, "_PRW", NULL, &buffer);
@ -773,6 +793,7 @@ static int acpi_bus_get_wakeup_device_flags(struct acpi_device *device)
device->wakeup.flags.valid = 1;
device->wakeup.prepare_count = 0;
acpi_bus_set_run_wake_flags(device);
/* Call _PSW/_DSW object to disable its ability to wake the sleeping
* system for the ACPI device with the _PRW object.
* The _PSW object is depreciated in ACPI 3.0 and is replaced by _DSW.
@ -784,10 +805,6 @@ static int acpi_bus_get_wakeup_device_flags(struct acpi_device *device)
ACPI_DEBUG_PRINT((ACPI_DB_INFO,
"error in _DSW or _PSW evaluation\n"));
/* Power button, Lid switch always enable wakeup */
if (!acpi_match_device_ids(device, button_device_ids))
device->wakeup.flags.run_wake = 1;
end:
if (ACPI_FAILURE(status))
device->flags.wake_capable = 0;

3
drivers/acpi/wakeup.c
View File

@ -110,7 +110,8 @@ int __init acpi_wakeup_device_init(void)
struct acpi_device,
wakeup_list);
/* In case user doesn't load button driver */
if (!dev->wakeup.flags.run_wake || dev->wakeup.state.enabled)
if (!dev->wakeup.flags.always_enabled ||
dev->wakeup.state.enabled)
continue;
acpi_enable_gpe(dev->wakeup.gpe_device, dev->wakeup.gpe_number,
ACPI_GPE_TYPE_WAKE);

2
include/acpi/acpi_bus.h
View File

@ -242,6 +242,7 @@ struct acpi_device_perf {
struct acpi_device_wakeup_flags {
u8 valid:1; /* Can successfully enable wakeup? */
u8 run_wake:1; /* Run-Wake GPE devices */
u8 always_enabled:1; /* Run-wake devices that are always enabled */
};
struct acpi_device_wakeup_state {
@ -256,6 +257,7 @@ struct acpi_device_wakeup {
struct acpi_device_wakeup_state state;
struct acpi_device_wakeup_flags flags;
int prepare_count;
int run_wake_count;
};
/* Device */