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Subject[PATCH 7/9] ACPI / PM: Add more run-time wake-up fields (rev. 2)
Date
From: Rafael J. Wysocki <rjw@sisk.pl>

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>
---
drivers/acpi/button.c | 2 ++
drivers/acpi/scan.c | 37 +++++++++++++++++++++++++++----------
drivers/acpi/wakeup.c | 3 ++-
include/acpi/acpi_bus.h | 2 ++
4 files changed, 33 insertions(+), 11 deletions(-)
Index: linux-2.6/drivers/acpi/wakeup.c
===================================================================
--- linux-2.6.orig/drivers/acpi/wakeup.c
+++ linux-2.6/drivers/acpi/wakeup.c
@@ -106,7 +106,8 @@ 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_ref_wakeup_gpe(dev->wakeup.gpe_device,
dev->wakeup.gpe_number);
Index: linux-2.6/include/acpi/acpi_bus.h
===================================================================
--- linux-2.6.orig/include/acpi/acpi_bus.h
+++ linux-2.6/include/acpi/acpi_bus.h
@@ -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 */
Index: linux-2.6/drivers/acpi/button.c
===================================================================
--- linux-2.6.orig/drivers/acpi/button.c
+++ linux-2.6/drivers/acpi/button.c
@@ -426,6 +426,7 @@ static int acpi_button_add(struct acpi_d
device->wakeup.gpe_number);
acpi_ref_wakeup_gpe(device->wakeup.gpe_device,
device->wakeup.gpe_number);
+ device->wakeup.run_wake_count++;
device->wakeup.state.enabled = 1;
}

@@ -450,6 +451,7 @@ static int acpi_button_remove(struct acp
device->wakeup.gpe_number);
acpi_unref_wakeup_gpe(device->wakeup.gpe_device,
device->wakeup.gpe_number);
+ device->wakeup.run_wake_count--;
device->wakeup.state.enabled = 0;
}

Index: linux-2.6/drivers/acpi/scan.c
===================================================================
--- linux-2.6.orig/drivers/acpi/scan.c
+++ linux-2.6/drivers/acpi/scan.c
@@ -741,19 +741,39 @@ acpi_bus_extract_wakeup_device_power_pac
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_fl

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_fl
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;


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