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authorSimon Glass <sjg@chromium.org>2016-01-21 19:44:58 -0700
committerSimon Glass <sjg@chromium.org>2016-01-21 20:42:36 -0700
commitf563dc1d195aa7ca0ba1ce614031e9727fab1325 (patch)
treed54147c647b53c89cfba06daf204ba02f4101f0b
parent65fba5927c9f5e313a15b952c8e51b6e3a693534 (diff)
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dm: panel: Add a panel uclass
LCD panels can usefully be modelled as their own uclass. They can be probed (which powers them up ready for use). If they have a backlight, this can be enabled. Signed-off-by: Simon Glass <sjg@chromium.org>
-rw-r--r--drivers/video/Makefile1
-rw-r--r--drivers/video/panel-uclass.c25
-rw-r--r--include/dm/uclass-id.h1
-rw-r--r--include/panel.h31
4 files changed, 58 insertions, 0 deletions
diff --git a/drivers/video/Makefile b/drivers/video/Makefile
index 6d89532..d29280c 100644
--- a/drivers/video/Makefile
+++ b/drivers/video/Makefile
@@ -8,6 +8,7 @@
ifdef CONFIG_DM
obj-$(CONFIG_DISPLAY_PORT) += dp-uclass.o
obj-$(CONFIG_DM_VIDEO) += backlight-uclass.o
+obj-$(CONFIG_DM_VIDEO) += panel-uclass.o
obj-$(CONFIG_DM_VIDEO) += video-uclass.o vidconsole-uclass.o console_normal.o
obj-$(CONFIG_DM_VIDEO) += video_bmp.o
ifdef CONFIG_DM_VIDEO
diff --git a/drivers/video/panel-uclass.c b/drivers/video/panel-uclass.c
new file mode 100644
index 0000000..3f4c41b
--- /dev/null
+++ b/drivers/video/panel-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 <panel.h>
+
+int panel_enable_backlight(struct udevice *dev)
+{
+ struct panel_ops *ops = panel_get_ops(dev);
+
+ if (!ops->enable_backlight)
+ return -ENOSYS;
+
+ return ops->enable_backlight(dev);
+}
+
+UCLASS_DRIVER(panel) = {
+ .id = UCLASS_PANEL,
+ .name = "panel",
+};
diff --git a/include/dm/uclass-id.h b/include/dm/uclass-id.h
index 5421981..8308c23 100644
--- a/include/dm/uclass-id.h
+++ b/include/dm/uclass-id.h
@@ -45,6 +45,7 @@ enum uclass_id {
UCLASS_MMC, /* SD / MMC card or chip */
UCLASS_MOD_EXP, /* RSA Mod Exp device */
UCLASS_MTD, /* Memory Technology Device (MTD) device */
+ UCLASS_PANEL, /* Display panel, such as an LCD */
UCLASS_PANEL_BACKLIGHT, /* Backlight controller for panel */
UCLASS_PCH, /* x86 platform controller hub */
UCLASS_PCI, /* PCI bus */
diff --git a/include/panel.h b/include/panel.h
new file mode 100644
index 0000000..57fccf2
--- /dev/null
+++ b/include/panel.h
@@ -0,0 +1,31 @@
+/*
+ * Copyright (c) 2016 Google, Inc
+ * Written by Simon Glass <sjg@chromium.org>
+ *
+ * SPDX-License-Identifier: GPL-2.0+
+ */
+
+#ifndef _PANEL_H
+#define _PANEL_H
+
+struct panel_ops {
+ /**
+ * enable_backlight() - Enable the panel backlight
+ *
+ * @dev: Panel device containing the backlight to enable
+ * @return 0 if OK, -ve on error
+ */
+ int (*enable_backlight)(struct udevice *dev);
+};
+
+#define panel_get_ops(dev) ((struct panel_ops *)(dev)->driver->ops)
+
+/**
+ * panel_enable_backlight() - Enable the panel backlight
+ *
+ * @dev: Panel device containing the backlight to enable
+ * @return 0 if OK, -ve on error
+ */
+int panel_enable_backlight(struct udevice *dev);
+
+#endif