dm: backlight: Add a backlight uclass
LCD panels normally have a backlight which can be controlled to illuminate
the LCD contents. Add a uclass to support this. Initially it only has a
method to enable the backlight.
Signed-off-by: Simon Glass <sjg@chromium.org>
diff --git a/drivers/video/Makefile b/drivers/video/Makefile
index ee04629..fa90721 100644
--- a/drivers/video/Makefile
+++ b/drivers/video/Makefile
@@ -7,6 +7,7 @@
ifdef CONFIG_DM
obj-$(CONFIG_DISPLAY_PORT) += dp-uclass.o
+obj-$(CONFIG_DM_VIDEO) += backlight-uclass.o
obj-$(CONFIG_DM_VIDEO) += video-uclass.o vidconsole-uclass.o console_normal.o
obj-$(CONFIG_DM_VIDEO) += video_bmp.o
obj-$(CONFIG_VIDEO_ROTATION) += console_rotate.o
diff --git a/drivers/video/backlight-uclass.c b/drivers/video/backlight-uclass.c
new file mode 100644
index 0000000..0238289
--- /dev/null
+++ b/drivers/video/backlight-uclass.c
@@ -0,0 +1,25 @@
+/*
+ * Copyright (c) 2016 Google, Inc
+ * Written by Simon Glass <sjg@chromium.org>
+ *
+ * SPDX-License-Identifier: GPL-2.0+
+ */
+
+#include <common.h>
+#include <dm.h>
+#include <backlight.h>
+
+int backlight_enable(struct udevice *dev)
+{
+ const struct backlight_ops *ops = backlight_get_ops(dev);
+
+ if (!ops->enable)
+ return -ENOSYS;
+
+ return ops->enable(dev);
+}
+
+UCLASS_DRIVER(backlight) = {
+ .id = UCLASS_PANEL_BACKLIGHT,
+ .name = "backlight",
+};