ARM: dts: imx6sx: Add LDB support

i.MX6SX has an LVDS controller that is connected to the eLCDIF.

Add support for it.
Signed-off-by: Fabio Estevam <festevam@denx.de>
Signed-off-by: Shawn Guo <shawnguo@kernel.org>

arch/arm/boot/dts/imx6sx.dtsi

@@ -841,10 +841,40 @@ iomuxc: pinctrl@20e0000 {
 				reg = <0x020e0000 0x4000>;
 			};
 
-			gpr: iomuxc-gpr@20e4000 {
+			gpr: syscon@20e4000 {
 				compatible = "fsl,imx6sx-iomuxc-gpr",
-					     "fsl,imx6q-iomuxc-gpr", "syscon";
+					     "fsl,imx6q-iomuxc-gpr", "syscon", "simple-mfd";
+				#address-cells = <1>;
+				#size-cells = <1>;
 				reg = <0x020e4000 0x4000>;
+
+				lvds_bridge: bridge@18 {
+					compatible = "fsl,imx6sx-ldb";
+					reg = <0x18 0x4>;
+					clocks = <&clks IMX6SX_CLK_LDB_DI0>;
+					clock-names = "ldb";
+					status = "disabled";
+
+					ports {
+						#address-cells = <1>;
+						#size-cells = <0>;
+
+						port@0 {
+							reg = <0>;
+
+							ldb_from_lcdif1: endpoint {
+								remote-endpoint = <&lcdif1_to_ldb>;
+							};
+						};
+
+						port@1 {
+							reg = <1>;
+
+							ldb_lvds_ch0: endpoint {
+							};
+						};
+					};
+				};
 			};
 
 			sdma: dma-controller@20ec000 {
@@ -1278,6 +1308,14 @@ lcdif1: lcdif@2220000 {
 					clock-names = "pix", "axi", "disp_axi";
 					power-domains = <&pd_disp>;
 					status = "disabled";
+
+					ports {
+						port {
+							lcdif1_to_ldb: endpoint {
+								remote-endpoint = <&ldb_from_lcdif1>;
+							};
+						};
+					};
 				};
 
 				lcdif2: lcdif@2224000 {