diff options
Diffstat (limited to 'drivers/acpi/sleep.c')
| -rw-r--r-- | drivers/acpi/sleep.c | 53 |
1 files changed, 24 insertions, 29 deletions
diff --git a/drivers/acpi/sleep.c b/drivers/acpi/sleep.c index 6913465..4defa02 100644 --- a/drivers/acpi/sleep.c +++ b/drivers/acpi/sleep.c @@ -684,28 +684,21 @@ int acpi_suspend(u32 acpi_state) #ifdef CONFIG_PM /** - * acpi_pm_device_sleep_state - return preferred power state of ACPI device - * in the system sleep state given by %acpi_target_sleep_state - * @dev: device to examine; its driver model wakeup flags control - * whether it should be able to wake up the system - * @d_min_p: used to store the upper limit of allowed states range - * @d_max_in: specify the lowest allowed states - * Return value: preferred power state of the device on success, -ENODEV - * (ie. if there's no 'struct acpi_device' for @dev) or -EINVAL on failure + * 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 * - * Find the lowest power (highest number) ACPI device power state that - * device @dev can be in while the system is in the sleep state represented - * by %acpi_target_sleep_state. If @wake is nonzero, the device should be - * able to wake up the system from this sleep state. If @d_min_p is set, - * the highest power (lowest number) device power state of @dev allowed - * in this system sleep state is stored at the location pointed to by it. + * Find the lowest power (highest number) ACPI device power state that the + * device can be in while the system is in the sleep state represented + * by %acpi_target_sleep_state. If @d_min_p is set, the highest power (lowest + * number) device power state that @dev can be in for the given system sleep + * state is stored at the location pointed to by it. * - * The caller must ensure that @dev is valid before using this function. - * The caller is also responsible for figuring out if the device is - * supposed to be able to wake up the system and passing this information - * via @wake. + * 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); @@ -797,14 +790,15 @@ int acpi_pm_device_sleep_state(struct device *dev, int *d_min_p, int d_max_in) EXPORT_SYMBOL(acpi_pm_device_sleep_state); #endif /* CONFIG_PM */ -#ifdef CONFIG_PM_SLEEP +#ifdef CONFIG_PM_RUNTIME /** - * acpi_pm_device_run_wake - Enable/disable wake-up for given device. - * @phys_dev: Device to enable/disable the platform to wake-up the system for. - * @enable: Whether enable or disable the wake-up functionality. + * 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 @pci_dev and try to - * enable/disable the GPE associated with it. + * 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) { @@ -832,12 +826,13 @@ int acpi_pm_device_run_wake(struct device *phys_dev, bool enable) return 0; } EXPORT_SYMBOL(acpi_pm_device_run_wake); +#endif /* CONFIG_PM_RUNTIME */ +#ifdef CONFIG_PM_SLEEP /** - * acpi_pm_device_sleep_wake - enable or disable the system wake-up - * capability of given device - * @dev: device to handle - * @enable: 'true' - enable, 'false' - disable the wake-up capability + * 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) { |
