[PATCH v3 1/3] dt-bindings: Add doc for the ingenic-drm driver

[Paul Cercueil <paul@crapouillou.net>]

Add documentation for the devicetree bindings of the DRM driver for the
JZ47xx family of SoCs from Ingenic.

Signed-off-by: Paul Cercueil <paul@crapouillou.net>
Tested-by: Artur Rojek <contact@artur-rojek.eu>
---

Notes:
    v2: Remove ingenic,panel property.
    
    v3: - Rename compatible strings from ingenic,jz47XX-drm to ingenic,jz47XX-lcd
        - The ingenic,lcd-mode property is now read from the panel node instead
    	  of from the driver node

 .../devicetree/bindings/display/ingenic,drm.txt    | 53 ++++++++++++++++++++++
 1 file changed, 53 insertions(+)
 create mode 100644 Documentation/devicetree/bindings/display/ingenic,drm.txt

diff --git a/Documentation/devicetree/bindings/display/ingenic,drm.txt b/Documentation/devicetree/bindings/display/ingenic,drm.txt
new file mode 100644
index 000000000000..9de47db8a515
--- /dev/null
+++ b/Documentation/devicetree/bindings/display/ingenic,drm.txt
@@ -0,0 +1,53 @@
+Ingenic JZ47xx DRM driver
+
+Required properties:
+- compatible: one of:
+  * ingenic,jz4740-lcd
+  * ingenic,jz4725b-lcd
+- reg: LCD registers location and length
+- clocks: LCD pixclock and device clock specifiers.
+	   The device clock is only required on the JZ4740.
+- clock-names: "lcd_pclk" and "lcd"
+- interrupts: Specifies the interrupt line the LCD controller is connected to.
+
+Optional properties in the panel mode:
+- ingenic,lcd-mode: LCD mode to use with the display panel.
+		    See <dt-bindings/display/ingenic,drm.h> for all the
+		    possible values.
+
+Example:
+
+#include <dt-bindings/display/ingenic,drm.h>
+
+panel {
+	compatible = "sharp,ls020b1dd01d", "simple-panel";
+
+	backlight = <&backlight>;
+	power-supply = <&vcc>;
+
+	ingenic,lcd-mode = <JZ_LCD_SPECIAL_TFT_2>;
+
+	port {
+		panel_input: endpoint {
+			remote-endpoint = <&panel_output>;
+		};
+	};
+};
+
+
+lcd: lcd-controller@13050000 {
+	compatible = "ingenic,jz4725b-lcd";
+	reg = <0x13050000 0x1000>;
+
+	interrupt-parent = <&intc>;
+	interrupts = <31>;
+
+	clocks = <&cgu JZ4725B_CLK_LCD>;
+	clock-names = "lcd";
+
+	port {
+		panel_output: endpoint {
+			remote-endpoint = <&panel_input>;
+		};
+	};
+};
-- 
2.11.0