ARM: dts: rockchip: add i2c dt nodes for rv1108

There are four i2c controllers on rv1108, add
device tree node for them.
Signed-off-by: Andy Yan <andy.yan@rock-chips.com>
Signed-off-by: Heiko Stuebner <heiko@sntech.de>

arch/arm/boot/dts/rv1108.dtsi

@@ -52,6 +52,10 @@ / {
 	interrupt-parent = <&gic>;
 
 	aliases {
+		i2c0 = &i2c0;
+		i2c1 = &i2c1;
+		i2c2 = &i2c2;
+		i2c3 = &i2c3;
 		serial0 = &uart0;
 		serial1 = &uart1;
 		serial2 = &uart2;
@@ -154,11 +158,67 @@ uart0: serial@10230000 {
 		status = "disabled";
 	};
 
+	i2c1: i2c@10240000 {
+		compatible = "rockchip,rv1108-i2c";
+		reg = <0x10240000 0x1000>;
+		interrupts = <GIC_SPI 31 IRQ_TYPE_LEVEL_HIGH>;
+		#address-cells = <1>;
+		#size-cells = <0>;
+		clocks = <&cru SCLK_I2C1>, <&cru PCLK_I2C1>;
+		clock-names = "i2c", "pclk";
+		pinctrl-names = "default";
+		pinctrl-0 = <&i2c1_xfer>;
+		rockchip,grf = <&grf>;
+		status = "disabled";
+	};
+
+	i2c2: i2c@10250000 {
+		compatible = "rockchip,rv1108-i2c";
+		reg = <0x10250000 0x1000>;
+		interrupts = <GIC_SPI 32 IRQ_TYPE_LEVEL_HIGH>;
+		#address-cells = <1>;
+		#size-cells = <0>;
+		clocks = <&cru SCLK_I2C2>, <&cru PCLK_I2C2>;
+		clock-names = "i2c", "pclk";
+		pinctrl-names = "default";
+		pinctrl-0 = <&i2c2m1_xfer>;
+		rockchip,grf = <&grf>;
+		status = "disabled";
+	};
+
+	i2c3: i2c@10260000 {
+		compatible = "rockchip,rv1108-i2c";
+		reg = <0x10260000 0x1000>;
+		interrupts = <GIC_SPI 33 IRQ_TYPE_LEVEL_HIGH>;
+		#address-cells = <1>;
+		#size-cells = <0>;
+		clocks = <&cru SCLK_I2C3>, <&cru PCLK_I2C3>;
+		clock-names = "i2c", "pclk";
+		pinctrl-names = "default";
+		pinctrl-0 = <&i2c3_xfer>;
+		rockchip,grf = <&grf>;
+		status = "disabled";
+	};
+
 	grf: syscon@10300000 {
 		compatible = "rockchip,rv1108-grf", "syscon";
 		reg = <0x10300000 0x1000>;
 	};
 
+	i2c0: i2c@20000000 {
+		compatible = "rockchip,rv1108-i2c";
+		reg = <0x20000000 0x1000>;
+		interrupts = <GIC_SPI 30 IRQ_TYPE_LEVEL_HIGH>;
+		#address-cells = <1>;
+		#size-cells = <0>;
+		clocks = <&cru SCLK_I2C0_PMU>, <&cru PCLK_I2C0_PMU>;
+		clock-names = "i2c", "pclk";
+		pinctrl-names = "default";
+		pinctrl-0 = <&i2c0_xfer>;
+		rockchip,grf = <&grf>;
+		status = "disabled";
+	};
+
 	pmugrf: syscon@20060000 {
 		compatible = "rockchip,rv1108-pmugrf", "syscon";
 		reg = <0x20060000 0x1000>;
@@ -303,6 +363,11 @@ pcfg_pull_none_drv_12ma: pcfg-pull-none-drv-12ma {
 			drive-strength = <12>;
 		};
 
+		pcfg_pull_none_smt: pcfg-pull-none-smt {
+			bias-disable;
+			input-schmitt-enable;
+		};
+
 		pcfg_pull_up_drv_8ma: pcfg-pull-up-drv-8ma {
 			bias-pull-up;
 			drive-strength = <8>;
@@ -330,6 +395,13 @@ pcfg_input_high: pcfg-input-high {
 			input-enable;
 		};
 
+		i2c0 {
+			i2c0_xfer: i2c0-xfer {
+				rockchip,pins = <0 RK_PB1 RK_FUNC_1 &pcfg_pull_none_smt>,
+						<0 RK_PB2 RK_FUNC_1 &pcfg_pull_none_smt>;
+			};
+		};
+
 		i2c1 {
 			i2c1_xfer: i2c1-xfer {
 				rockchip,pins = <2 RK_PD3 RK_FUNC_1 &pcfg_pull_up>,