arm64: renesas: r8a7795: add I2C support

Signed-off-by: Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>
[geert: aAdd clock-output-names properties]
Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>
Signed-off-by: Simon Horman <horms+renesas@verge.net.au>
Acked-by: Geert Uytterhoeven <geert+renesas@glider.be>

arch/arm64/boot/dts/renesas/r8a7795.dtsi

@@ -16,6 +16,16 @@ / {
 	#address-cells = <2>;
 	#size-cells = <2>;
 
+	aliases {
+		i2c0 = &i2c0;
+		i2c1 = &i2c1;
+		i2c2 = &i2c2;
+		i2c3 = &i2c3;
+		i2c4 = &i2c4;
+		i2c5 = &i2c5;
+		i2c6 = &i2c6;
+	};
+
 	cpus {
 		#address-cells = <1>;
 		#size-cells = <0>;
@@ -323,5 +333,82 @@ scif5: serial@e6f30000 {
 			power-domains = <&cpg>;
 			status = "disabled";
 		};
+
+		i2c0: i2c@e6500000 {
+			#address-cells = <1>;
+			#size-cells = <0>;
+			compatible = "renesas,i2c-r8a7795";
+			reg = <0 0xe6500000 0 0x40>;
+			interrupts = <GIC_SPI 287 IRQ_TYPE_LEVEL_HIGH>;
+			clocks = <&cpg CPG_MOD 931>;
+			power-domains = <&cpg>;
+			status = "disabled";
+		};
+
+		i2c1: i2c@e6508000 {
+			#address-cells = <1>;
+			#size-cells = <0>;
+			compatible = "renesas,i2c-r8a7795";
+			reg = <0 0xe6508000 0 0x40>;
+			interrupts = <GIC_SPI 288 IRQ_TYPE_LEVEL_HIGH>;
+			clocks = <&cpg CPG_MOD 930>;
+			power-domains = <&cpg>;
+			status = "disabled";
+		};
+
+		i2c2: i2c@e6510000 {
+			#address-cells = <1>;
+			#size-cells = <0>;
+			compatible = "renesas,i2c-r8a7795";
+			reg = <0 0xe6510000 0 0x40>;
+			interrupts = <GIC_SPI 286 IRQ_TYPE_LEVEL_HIGH>;
+			clocks = <&cpg CPG_MOD 929>;
+			power-domains = <&cpg>;
+			status = "disabled";
+		};
+
+		i2c3: i2c@e66d0000 {
+			#address-cells = <1>;
+			#size-cells = <0>;
+			compatible = "renesas,i2c-r8a7795";
+			reg = <0 0xe66d0000 0 0x40>;
+			interrupts = <GIC_SPI 290 IRQ_TYPE_LEVEL_HIGH>;
+			clocks = <&cpg CPG_MOD 928>;
+			power-domains = <&cpg>;
+			status = "disabled";
+		};
+
+		i2c4: i2c@e66d8000 {
+			#address-cells = <1>;
+			#size-cells = <0>;
+			compatible = "renesas,i2c-r8a7795";
+			reg = <0 0xe66d8000 0 0x40>;
+			interrupts = <GIC_SPI 19 IRQ_TYPE_LEVEL_HIGH>;
+			clocks = <&cpg CPG_MOD 927>;
+			power-domains = <&cpg>;
+			status = "disabled";
+		};
+
+		i2c5: i2c@e66e0000 {
+			#address-cells = <1>;
+			#size-cells = <0>;
+			compatible = "renesas,i2c-r8a7795";
+			reg = <0 0xe66e0000 0 0x40>;
+			interrupts = <GIC_SPI 20 IRQ_TYPE_LEVEL_HIGH>;
+			clocks = <&cpg CPG_MOD 919>;
+			power-domains = <&cpg>;
+			status = "disabled";
+		};
+
+		i2c6: i2c@e66e8000 {
+			#address-cells = <1>;
+			#size-cells = <0>;
+			compatible = "renesas,i2c-r8a7795";
+			reg = <0 0xe66e8000 0 0x40>;
+			interrupts = <GIC_SPI 21 IRQ_TYPE_LEVEL_HIGH>;
+			clocks = <&cpg CPG_MOD 918>;
+			power-domains = <&cpg>;
+			status = "disabled";
+		};
 	};
 };