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authorRafael J. Wysocki <rafael.j.wysocki@intel.com>2012-11-02 01:40:28 +0100
committerRafael J. Wysocki <rafael.j.wysocki@intel.com>2012-11-15 00:15:17 +0100
commitcd7bd02d319eb34fa33d1705cf63f64928643708 (patch)
tree2c50ce575464d56e15eff4fd72388066dbeb208c /drivers/acpi/device_pm.c
parent86b3832c64b6d01092216d84dc6a6b300875d0bb (diff)
downloadop-kernel-dev-cd7bd02d319eb34fa33d1705cf63f64928643708.zip
op-kernel-dev-cd7bd02d319eb34fa33d1705cf63f64928643708.tar.gz
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>
Diffstat (limited to 'drivers/acpi/device_pm.c')
-rw-r--r--drivers/acpi/device_pm.c39
1 files changed, 39 insertions, 0 deletions
diff --git a/drivers/acpi/device_pm.c b/drivers/acpi/device_pm.c
index c017b80..8105298 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 */
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