X-Git-Url: https://git.librecmc.org/?a=blobdiff_plain;f=include%2Fbacklight.h;h=ac59eb293b45de51686fa8c033709077bdf0465b;hb=7787330200526023f49b4d60869a1c91e908132a;hp=90e1d981e1a4d3eaec2e64d0647bd8118c4d3a0b;hpb=12f229ea8f6c8e20f8fd07906eafc853c4c354a9;p=oweals%2Fu-boot.git

diff --git a/include/backlight.h b/include/backlight.h
index 90e1d981e1..ac59eb293b 100644
--- a/include/backlight.h
+++ b/include/backlight.h
@@ -1,13 +1,19 @@
+/* SPDX-License-Identifier: GPL-2.0+ */
 /*
  * Copyright (c) 2016 Google, Inc
  * Written by Simon Glass <sjg@chromium.org>
- *
- * SPDX-License-Identifier:	GPL-2.0+
  */
 
 #ifndef _BACKLIGHT_H
 #define _BACKLIGHT_H
 
+enum {
+	BACKLIGHT_MAX		= 100,
+	BACKLIGHT_MIN		= 0,
+	BACKLIGHT_OFF		= -1,
+	BACKLIGHT_DEFAULT	= -2,
+};
+
 struct backlight_ops {
 	/**
 	 * enable() - Enable a backlight
@@ -16,6 +22,15 @@ struct backlight_ops {
 	 * @return 0 if OK, -ve on error
 	 */
 	int (*enable)(struct udevice *dev);
+
+	/**
+	 * set_brightness - Set brightness
+	 *
+	 * @dev:	Backlight device to update
+	 * @percent:	Brightness value (0 to 100, or BACKLIGHT_... value)
+	 * @return 0 if OK, -ve on error
+	 */
+	int (*set_brightness)(struct udevice *dev, int percent);
 };
 
 #define backlight_get_ops(dev)	((struct backlight_ops *)(dev)->driver->ops)
@@ -28,4 +43,13 @@ struct backlight_ops {
  */
 int backlight_enable(struct udevice *dev);
 
+/**
+ * backlight_set_brightness - Set brightness
+ *
+ * @dev:	Backlight device to update
+ * @percent:	Brightness value (0 to 100, or BACKLIGHT_... value)
+ * @return 0 if OK, -ve on error
+ */
+int backlight_set_brightness(struct udevice *dev, int percent);
+
 #endif