@@ -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,
};
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(+)