Add kernel-doc documentation for the backlight enums
Signed-off-by: Sam Ravnborg sam@ravnborg.org Cc: Lee Jones lee.jones@linaro.org Cc: Daniel Thompson daniel.thompson@linaro.org Cc: Jingoo Han jingoohan1@gmail.com --- include/linux/backlight.h | 84 +++++++++++++++++++++++++++++++++++++++ 1 file changed, 84 insertions(+)
diff --git a/include/linux/backlight.h b/include/linux/backlight.h index b8e78549a48c..bedc0c9885b6 100644 --- a/include/linux/backlight.h +++ b/include/linux/backlight.h @@ -14,26 +14,110 @@ #include <linux/mutex.h> #include <linux/notifier.h>
+/** + * enum backlight_update_reason - what method was used to update backlight + * + * A driver indicates the method (reason) used for updating the backlight + * when calling backlight_force_update(). + */ enum backlight_update_reason { + /** + * @BACKLIGHT_UPDATE_HOTKEY: + * + * The backlight was updated using a hot-key. + */ BACKLIGHT_UPDATE_HOTKEY, + + /** + * @BACKLIGHT_UPDATE_SYSFS: + * + * The backlight was updated using sysfs. + */ BACKLIGHT_UPDATE_SYSFS, };
+/** + * enum backlight_type - the type of backlight control + * + * The type of interface used to control the backlight. + */ enum backlight_type { + /** + * @BACKLIGHT_RAW: + * + * The backlight is controlled using hardware registers directly. + */ BACKLIGHT_RAW = 1, + + /** + * @BACKLIGHT_PLATFORM: + * + * The backlight is controller using a platform-specific interface. + */ BACKLIGHT_PLATFORM, + + /** + * @BACKLIGHT_FIRMWARE: + * + * The backlight is controlled using a standard firmware interface. + */ BACKLIGHT_FIRMWARE, + + /** + * @BACKLIGHT_TYPE_MAX: Number of entries. + */ BACKLIGHT_TYPE_MAX, };
+/** + * enum backlight_notification - the type of notification + * + * The notifications that is used for notification sent to the receiver + * that registered notifications using backlight_register_notifier(). + */ enum backlight_notification { + /** + * @BACKLIGHT_REGISTERED: + * + * The backlight device is registered. + */ BACKLIGHT_REGISTERED, + + /** + * @BACKLIGHT_UNREGISTERED: + * + * The backlight revice is unregistered. + */ BACKLIGHT_UNREGISTERED, };
+/** enum backlight_scale - the type of scale used for brightness values + * + * The type of scale used for brightness values. + */ enum backlight_scale { + /** + * @BACKLIGHT_SCALE_UNKNOWN: + * + * The scale is unknown. + */ BACKLIGHT_SCALE_UNKNOWN = 0, + + /** + * @BACKLIGHT_SCALE_LINEAR: + * + * The scale is linear, so the brigness increase is the same + * when increasing with the same steps (more or less). + */ BACKLIGHT_SCALE_LINEAR, + + /** + * @BACKLIGHT_SCALE_NON_LINEAR: + * + * The scale is not linear. This is often used when the brightness + * values tries to adjust to the relative perception of the eye + * demanding a non-linear scale. + */ BACKLIGHT_SCALE_NON_LINEAR, };