ACPI / PM: Move runtime remote wakeup setup routine to device_pm.c

The ACPI function for setting up devices to do runtime remote
wakeup is now located in drivers/acpi/sleep.c, but
drivers/acpi/device_pm.c is a more logical place for it, so move it
there.

No functional changes should result from this modification.

Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>

1 files changed, 39 insertions, 0 deletions

diff --git a/drivers/acpi/device_pm.c b/drivers/acpi/device_pm.c
index c017b801171c..81052981045e 100644
--- a/drivers/acpi/device_pm.c
+++ b/drivers/acpi/device_pm.c
@@ -26,6 +26,7 @@
 #include <linux/export.h>
 #include <linux/mutex.h>
 #include <linux/pm_qos.h>
+#include <linux/pm_runtime.h>
 
 #include <acpi/acpi.h>
 #include <acpi/acpi_bus.h>
@@ -196,3 +197,41 @@ int acpi_device_power_state(struct device *dev, struct acpi_device *adev,
 	return d_max;
 }
 EXPORT_SYMBOL_GPL(acpi_device_power_state);
+
+#ifdef CONFIG_PM_RUNTIME
+/**
+ * acpi_pm_device_run_wake - Enable/disable remote wakeup for given device.
+ * @phys_dev: Device to enable/disable the platform to wake up.
+ * @enable: Whether to enable or disable the wakeup functionality.
+ *
+ * Find the ACPI device object corresponding to @phys_dev and try to
+ * enable/disable the GPE associated with it, so that it can generate
+ * wakeup signals for the device in response to external (remote) events.
+ */
+int acpi_pm_device_run_wake(struct device *phys_dev, bool enable)
+{
+	struct acpi_device *dev;
+	acpi_handle handle;
+
+	if (!device_run_wake(phys_dev))
+		return -EINVAL;
+
+	handle = DEVICE_ACPI_HANDLE(phys_dev);
+	if (!handle || ACPI_FAILURE(acpi_bus_get_device(handle, &dev))) {
+		dev_dbg(phys_dev, "ACPI handle has no context in %s!\n",
+			__func__);
+		return -ENODEV;
+	}
+
+	if (enable) {
+		acpi_enable_wakeup_device_power(dev, ACPI_STATE_S0);
+		acpi_enable_gpe(dev->wakeup.gpe_device, dev->wakeup.gpe_number);
+	} else {
+		acpi_disable_gpe(dev->wakeup.gpe_device, dev->wakeup.gpe_number);
+		acpi_disable_wakeup_device_power(dev);
+	}
+
+	return 0;
+}
+EXPORT_SYMBOL(acpi_pm_device_run_wake);
+#endif /* CONFIG_PM_RUNTIME */