at91: video: DT binding for HLCDC driver
DT binding documentation for atmel HLCDC driver.
Signed-off-by: Songjun Wu <songjun.wu@microchip.com>
diff --git a/doc/device-tree-bindings/video/atmel-hlcdc.txt b/doc/device-tree-bindings/video/atmel-hlcdc.txt
new file mode 100644
index 0000000..b378cbf
--- /dev/null
+++ b/doc/device-tree-bindings/video/atmel-hlcdc.txt
@@ -0,0 +1,42 @@
+Atmel HLCDC Framebuffer
+-----------------------------------------------------
+Required properties:
+- compatible :
+ "atmel,sama5d2-hlcdc", "atmel,at91sam9x5-hlcdc".
+- reg: physical base address of the controller and length of memory mapped
+ region.
+- clocks: phandles to input clocks.
+- atmel,vl-bpix: Bits per pixel.
+- atmel,output-mode: LCD Controller Output Mode,
+ The unit is bits per pixel, there are four values,
+ <12>, <16>, <18>, <24>, the default value is <24>.
+- atmel,guard-time: lcd guard time (Delay in frame periods).
+- display-timings: please refer the displaymode.txt.
+
+Example:
+hlcdc: hlcdc@f0000000 {
+ u-boot,dm-pre-reloc;
+ compatible = "atmel,sama5d2-hlcdc";
+ reg = <0xf0000000 0x2000>;
+ clocks = <&lcdc_clk>;
+ atmel,vl-bpix = <4>;
+ atmel,output-mode = <24>;
+ atmel,guard-time = <1>;
+ pinctrl-names = "default";
+ pinctrl-0 = <&pinctrl_lcd_base &pinctrl_lcd_pwm &pinctrl_lcd_rgb666>;
+ status = "okay";
+
+ display-timings {
+ 480x272 {
+ clock-frequency = <9000000>;
+ hactive = <480>;
+ vactive = <272>;
+ hsync-len = <41>;
+ hfront-porch = <2>;
+ hback-porch = <2>;
+ vfront-porch = <2>;
+ vback-porch = <2>;
+ vsync-len = <11>;
+ };
+ };
+};