diff options
Diffstat (limited to 'drivers/acpi/device_pm.c')
| -rw-r--r-- | drivers/acpi/device_pm.c | 54 |
1 files changed, 54 insertions, 0 deletions
diff --git a/drivers/acpi/device_pm.c b/drivers/acpi/device_pm.c index b4f03f91b0b0..7ddd93463a2e 100644 --- a/drivers/acpi/device_pm.c +++ b/drivers/acpi/device_pm.c @@ -198,6 +198,31 @@ int acpi_device_power_state(struct device *dev, struct acpi_device *adev, } EXPORT_SYMBOL_GPL(acpi_device_power_state); +/** + * acpi_pm_device_sleep_state - Get preferred power state of ACPI device. + * @dev: Device whose preferred target power state to return. + * @d_min_p: Location to store the upper limit of the allowed states range. + * @d_max_in: Deepest low-power state to take into consideration. + * Return value: Preferred power state of the device on success, -ENODEV + * (if there's no 'struct acpi_device' for @dev) or -EINVAL on failure + * + * The caller must ensure that @dev is valid before using this function. + */ +int acpi_pm_device_sleep_state(struct device *dev, int *d_min_p, int d_max_in) +{ + acpi_handle handle = DEVICE_ACPI_HANDLE(dev); + struct acpi_device *adev; + + if (!handle || ACPI_FAILURE(acpi_bus_get_device(handle, &adev))) { + dev_dbg(dev, "ACPI handle without context in %s!\n", __func__); + return -ENODEV; + } + + return acpi_device_power_state(dev, adev, acpi_target_system_state(), + d_max_in, d_min_p); +} +EXPORT_SYMBOL(acpi_pm_device_sleep_state); + #ifdef CONFIG_PM_RUNTIME /** * __acpi_device_run_wake - Enable/disable runtime remote wakeup for device. @@ -274,4 +299,33 @@ int __acpi_device_sleep_wake(struct acpi_device *adev, u32 target_state, acpi_enable_wakeup_device_power(adev, target_state) : acpi_disable_wakeup_device_power(adev); } + +/** + * acpi_pm_device_sleep_wake - Enable or disable device to wake up the system. + * @dev: Device to enable/desible to wake up the system from sleep states. + * @enable: Whether to enable or disable @dev to wake up the system. + */ +int acpi_pm_device_sleep_wake(struct device *dev, bool enable) +{ + acpi_handle handle; + struct acpi_device *adev; + int error; + + if (!device_can_wakeup(dev)) + return -EINVAL; + + handle = DEVICE_ACPI_HANDLE(dev); + if (!handle || ACPI_FAILURE(acpi_bus_get_device(handle, &adev))) { + dev_dbg(dev, "ACPI handle without context in %s!\n", __func__); + return -ENODEV; + } + + error = __acpi_device_sleep_wake(adev, acpi_target_system_state(), + enable); + if (!error) + dev_info(dev, "System wakeup %s by ACPI\n", + enable ? "enabled" : "disabled"); + + return error; +} #endif /* CONFIG_PM_SLEEP */ |