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path: root/drivers/pnp/pnpacpi/core.c
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Diffstat (limited to 'drivers/pnp/pnpacpi/core.c')
-rw-r--r--drivers/pnp/pnpacpi/core.c23
1 files changed, 23 insertions, 0 deletions
diff --git a/drivers/pnp/pnpacpi/core.c b/drivers/pnp/pnpacpi/core.c
index f7ff628b7d9..dc4e32e031e 100644
--- a/drivers/pnp/pnpacpi/core.c
+++ b/drivers/pnp/pnpacpi/core.c
@@ -122,17 +122,37 @@ static int pnpacpi_disable_resources(struct pnp_dev *dev)
}
#ifdef CONFIG_ACPI_SLEEP
+static bool pnpacpi_can_wakeup(struct pnp_dev *dev)
+{
+ struct acpi_device *acpi_dev = dev->data;
+ acpi_handle handle = acpi_dev->handle;
+
+ return acpi_bus_can_wakeup(handle);
+}
+
static int pnpacpi_suspend(struct pnp_dev *dev, pm_message_t state)
{
struct acpi_device *acpi_dev = dev->data;
acpi_handle handle = acpi_dev->handle;
int power_state;
+ if (device_can_wakeup(&dev->dev)) {
+ int rc = acpi_pm_device_sleep_wake(&dev->dev,
+ device_may_wakeup(&dev->dev));
+
+ if (rc)
+ return rc;
+ }
power_state = acpi_pm_device_sleep_state(&dev->dev, NULL);
if (power_state < 0)
power_state = (state.event == PM_EVENT_ON) ?
ACPI_STATE_D0 : ACPI_STATE_D3;
+ /* acpi_bus_set_power() often fails (keyboard port can't be
+ * powered-down?), and in any case, our return value is ignored
+ * by pnp_bus_suspend(). Hence we don't revert the wakeup
+ * setting if the set_power fails.
+ */
return acpi_bus_set_power(handle, power_state);
}
@@ -141,6 +161,8 @@ static int pnpacpi_resume(struct pnp_dev *dev)
struct acpi_device *acpi_dev = dev->data;
acpi_handle handle = acpi_dev->handle;
+ if (device_may_wakeup(&dev->dev))
+ acpi_pm_device_sleep_wake(&dev->dev, false);
return acpi_bus_set_power(handle, ACPI_STATE_D0);
}
#endif
@@ -151,6 +173,7 @@ struct pnp_protocol pnpacpi_protocol = {
.set = pnpacpi_set_resources,
.disable = pnpacpi_disable_resources,
#ifdef CONFIG_ACPI_SLEEP
+ .can_wakeup = pnpacpi_can_wakeup,
.suspend = pnpacpi_suspend,
.resume = pnpacpi_resume,
#endif