Add device(power/sleep button and lid) wake function from sleeping state.

This is required for some Thinkpad (and maybe VAIO) machines to wake
the system up from sleep.

Currently partially implemented, more complete implementation will come later.

1 files changed, 22 insertions, 0 deletions

diff --git a/sys/dev/acpica/acpi_button.c b/sys/dev/acpica/acpi_button.c
index 1506895..a4bebc2 100644
--- a/sys/dev/acpica/acpi_button.c
+++ b/sys/dev/acpica/acpi_button.c
@@ -53,6 +53,8 @@ struct acpi_button_softc {
 
 static int	acpi_button_probe(device_t dev);
 static int	acpi_button_attach(device_t dev);
+static int	acpi_button_suspend(device_t dev);
+static int	acpi_button_resume(device_t dev);
 static void 	acpi_button_notify_handler(ACPI_HANDLE h,UINT32 notify, void *context);
 static void	acpi_button_notify_pressed_for_sleep(void *arg);
 static void	acpi_button_notify_pressed_for_wakeup(void *arg);
@@ -61,6 +63,8 @@ static device_method_t acpi_button_methods[] = {
     /* Device interface */
     DEVMETHOD(device_probe,	acpi_button_probe),
     DEVMETHOD(device_attach,	acpi_button_attach),
+    DEVMETHOD(device_suspend,	acpi_button_suspend),
+    DEVMETHOD(device_resume,	acpi_button_resume),
 
     {0, 0}
 };
@@ -114,9 +118,27 @@ acpi_button_attach(device_t dev)
 	device_printf(sc->button_dev, "couldn't install Notify handler - %s\n", AcpiFormatException(status));
 	return_VALUE(ENXIO);
     }
+    acpi_device_enable_wake_capability(sc->button_handle, 1);
     return_VALUE(0);
 }
 
+static int
+acpi_button_suspend(device_t dev)
+{
+    struct acpi_button_softc	*sc;
+
+    sc = device_get_softc(dev);
+    acpi_device_enable_wake_event(sc->button_handle);
+    return (0);
+}
+
+static int
+acpi_button_resume(device_t dev)
+{
+
+    return (0);
+}
+
 static void
 acpi_button_notify_pressed_for_sleep(void *arg)
 {