From 6a195d2d8a9c321817e1f034afcdc8c8642664bc Mon Sep 17 00:00:00 2001 From: Stephen Warren Date: Mon, 27 May 2013 18:31:17 +0000 Subject: lcd: add functions to set up simplefb device tree simple-framebuffer is a new device tree binding that describes a pre- configured frame-buffer memory region and its format. The Linux kernel contains a driver that supports this binding. Implement functions to create a DT node (or fill in an existing node) with parameters that describe the framebuffer format that U-Boot is using. This will be immediately used by the Raspberry Pi board in U-Boot, and likely will be used by the Samsung ARM ChromeBook support soon too. It could well be used by many other boards (e.g. Tegra boards with built-in LCD panels, which aren't yet supported by the Linux kernel). Signed-off-by: Stephen Warren Acked-by: Simon Glass --- .../video/simple-framebuffer.txt | 25 ++++++++++++++++++++++ 1 file changed, 25 insertions(+) create mode 100644 doc/device-tree-bindings/video/simple-framebuffer.txt (limited to 'doc/device-tree-bindings') diff --git a/doc/device-tree-bindings/video/simple-framebuffer.txt b/doc/device-tree-bindings/video/simple-framebuffer.txt new file mode 100644 index 0000000000..3ea4605831 --- /dev/null +++ b/doc/device-tree-bindings/video/simple-framebuffer.txt @@ -0,0 +1,25 @@ +Simple Framebuffer + +A simple frame-buffer describes a raw memory region that may be rendered to, +with the assumption that the display hardware has already been set up to scan +out from that buffer. + +Required properties: +- compatible: "simple-framebuffer" +- reg: Should contain the location and size of the framebuffer memory. +- width: The width of the framebuffer in pixels. +- height: The height of the framebuffer in pixels. +- stride: The number of bytes in each line of the framebuffer. +- format: The format of the framebuffer surface. Valid values are: + - r5g6b5 (16-bit pixels, d[15:11]=r, d[10:5]=g, d[4:0]=b). + +Example: + + framebuffer { + compatible = "simple-framebuffer"; + reg = <0x1d385000 (1600 * 1200 * 2)>; + width = <1600>; + height = <1200>; + stride = <(1600 * 2)>; + format = "r5g6b5"; + }; -- cgit v1.2.1