diff options
Diffstat (limited to 'drivers/acpi/device_pm.c')
| -rw-r--r-- | drivers/acpi/device_pm.c | 39 |
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 */ |
