ARM: dts: imx6q-utilite-pro: i2c1 is muxed

It turns out that the i2c1 adapter is connected to a multiplexer
controlled by a gpio line. The first (default) mux option connects
i2c1 to a bus connected to the already known peripherals. The other
one connects the adapter to the ddc pins of the DVI port.
Signed-off-by: NChristopher Spinrath <christopher.spinrath@rwth-aachen.de>
Signed-off-by: NShawn Guo <shawnguo@kernel.org>

arch/arm/boot/dts/imx6q-utilite-pro.dts

@@ -71,6 +71,40 @@
 			gpio-key,wakeup;
 		};
 	};
+
+	i2cmux {
+		compatible = "i2c-mux-gpio";
+		pinctrl-names = "default";
+		pinctrl-0 = <&pinctrl_i2c1mux>;
+		#address-cells = <1>;
+		#size-cells = <0>;
+
+		mux-gpios = <&gpio1 2 GPIO_ACTIVE_HIGH>;
+		i2c-parent = <&i2c1>;
+
+		i2c@0 {
+			reg = <0>;
+			#address-cells = <1>;
+			#size-cells = <0>;
+
+			eeprom@50 {
+				compatible = "at24,24c02";
+				reg = <0x50>;
+				pagesize = <16>;
+			};
+
+			em3027: rtc@56 {
+				compatible = "emmicro,em3027";
+				reg = <0x56>;
+			};
+		};
+
+		i2c_dvi_ddc: i2c@1 {
+			reg = <1>;
+			#address-cells = <1>;
+			#size-cells = <0>;
+		};
+	};
 };
 
 &hdmi {
@@ -82,17 +116,6 @@
 	pinctrl-names = "default";
 	pinctrl-0 = <&pinctrl_i2c1>;
 	status = "okay";
-
-	eeprom@50 {
-		compatible = "at24,24c02";
-		reg = <0x50>;
-		pagesize = <16>;
-	};
-
-	em3027: rtc@56 {
-		compatible = "emmicro,em3027";
-		reg = <0x56>;
-	};
 };
 
 &i2c2 {
@@ -115,6 +138,12 @@
 		>;
 	};
 
+	pinctrl_i2c1mux: i2c1muxgrp {
+		fsl,pins = <
+			MX6QDL_PAD_GPIO_2__GPIO1_IO02 0x1b0b0
+		>;
+	};
+
 	pinctrl_i2c2: i2c2grp {
 		fsl,pins = <
 			MX6QDL_PAD_KEY_COL3__I2C2_SCL 0x4001b8b1