ARM: dts: r8a7744: Add I2C and IIC support

Add the I2C[0-5] and IIC[0,1,3] devices nodes to the R8A7744 device tree.
Signed-off-by: Biju Das <biju.das@bp.renesas.com>
Reviewed-by: Geert Uytterhoeven <geert+renesas@glider.be>
Signed-off-by: Simon Horman <horms+renesas@verge.net.au>

arch/arm/boot/dts/r8a7744.dtsi

@@ -310,19 +310,142 @@ icram2:	sram@e6300000 {
 			reg = <0 0xe6300000 0 0x40000>;
 		};
 
+		/* The memory map in the User's Manual maps the cores to
+		 * bus numbers
+		 */
+		i2c0: i2c@e6508000 {
+			#address-cells = <1>;
+			#size-cells = <0>;
+			compatible = "renesas,i2c-r8a7744",
+				     "renesas,rcar-gen2-i2c";
+			reg = <0 0xe6508000 0 0x40>;
+			interrupts = <GIC_SPI 287 IRQ_TYPE_LEVEL_HIGH>;
+			clocks = <&cpg CPG_MOD 931>;
+			power-domains = <&sysc R8A7744_PD_ALWAYS_ON>;
+			resets = <&cpg 931>;
+			i2c-scl-internal-delay-ns = <6>;
+			status = "disabled";
+		};
+
+		i2c1: i2c@e6518000 {
+			#address-cells = <1>;
+			#size-cells = <0>;
+			compatible = "renesas,i2c-r8a7744",
+				     "renesas,rcar-gen2-i2c";
+			reg = <0 0xe6518000 0 0x40>;
+			interrupts = <GIC_SPI 288 IRQ_TYPE_LEVEL_HIGH>;
+			clocks = <&cpg CPG_MOD 930>;
+			power-domains = <&sysc R8A7744_PD_ALWAYS_ON>;
+			resets = <&cpg 930>;
+			i2c-scl-internal-delay-ns = <6>;
+			status = "disabled";
+		};
+
 		i2c2: i2c@e6530000 {
 			#address-cells = <1>;
 			#size-cells = <0>;
+			compatible = "renesas,i2c-r8a7744",
+				     "renesas,rcar-gen2-i2c";
 			reg = <0 0xe6530000 0 0x40>;
-			/* placeholder */
+			interrupts = <GIC_SPI 286 IRQ_TYPE_LEVEL_HIGH>;
+			clocks = <&cpg CPG_MOD 929>;
+			power-domains = <&sysc R8A7744_PD_ALWAYS_ON>;
+			resets = <&cpg 929>;
+			i2c-scl-internal-delay-ns = <6>;
+			status = "disabled";
+		};
+
+		i2c3: i2c@e6540000 {
+			#address-cells = <1>;
+			#size-cells = <0>;
+			compatible = "renesas,i2c-r8a7744",
+				     "renesas,rcar-gen2-i2c";
+			reg = <0 0xe6540000 0 0x40>;
+			interrupts = <GIC_SPI 290 IRQ_TYPE_LEVEL_HIGH>;
+			clocks = <&cpg CPG_MOD 928>;
+			power-domains = <&sysc R8A7744_PD_ALWAYS_ON>;
+			resets = <&cpg 928>;
+			i2c-scl-internal-delay-ns = <6>;
+			status = "disabled";
+		};
+
+		i2c4: i2c@e6520000 {
+			#address-cells = <1>;
+			#size-cells = <0>;
+			compatible = "renesas,i2c-r8a7744",
+				     "renesas,rcar-gen2-i2c";
+			reg = <0 0xe6520000 0 0x40>;
+			interrupts = <GIC_SPI 19 IRQ_TYPE_LEVEL_HIGH>;
+			clocks = <&cpg CPG_MOD 927>;
+			power-domains = <&sysc R8A7744_PD_ALWAYS_ON>;
+			resets = <&cpg 927>;
+			i2c-scl-internal-delay-ns = <6>;
+			status = "disabled";
 		};
 
 		i2c5: i2c@e6528000 {
 			/* doesn't need pinmux */
 			#address-cells = <1>;
 			#size-cells = <0>;
+			compatible = "renesas,i2c-r8a7744",
+				     "renesas,rcar-gen2-i2c";
 			reg = <0 0xe6528000 0 0x40>;
-			/* placeholder */
+			interrupts = <GIC_SPI 20 IRQ_TYPE_LEVEL_HIGH>;
+			clocks = <&cpg CPG_MOD 925>;
+			power-domains = <&sysc R8A7744_PD_ALWAYS_ON>;
+			resets = <&cpg 925>;
+			i2c-scl-internal-delay-ns = <110>;
+			status = "disabled";
+		};
+
+		iic0: i2c@e6500000 {
+			#address-cells = <1>;
+			#size-cells = <0>;
+			compatible = "renesas,iic-r8a7744",
+				     "renesas,rcar-gen2-iic",
+				     "renesas,rmobile-iic";
+			reg = <0 0xe6500000 0 0x425>;
+			interrupts = <GIC_SPI 174 IRQ_TYPE_LEVEL_HIGH>;
+			clocks = <&cpg CPG_MOD 318>;
+			dmas = <&dmac0 0x61>, <&dmac0 0x62>,
+			       <&dmac1 0x61>, <&dmac1 0x62>;
+			dma-names = "tx", "rx", "tx", "rx";
+			power-domains = <&sysc R8A7744_PD_ALWAYS_ON>;
+			resets = <&cpg 318>;
+			status = "disabled";
+		};
+
+		iic1: i2c@e6510000 {
+			#address-cells = <1>;
+			#size-cells = <0>;
+			compatible = "renesas,iic-r8a7744",
+				     "renesas,rcar-gen2-iic",
+				     "renesas,rmobile-iic";
+			reg = <0 0xe6510000 0 0x425>;
+			interrupts = <GIC_SPI 175 IRQ_TYPE_LEVEL_HIGH>;
+			clocks = <&cpg CPG_MOD 323>;
+			dmas = <&dmac0 0x65>, <&dmac0 0x66>,
+			       <&dmac1 0x65>, <&dmac1 0x66>;
+			dma-names = "tx", "rx", "tx", "rx";
+			power-domains = <&sysc R8A7744_PD_ALWAYS_ON>;
+			resets = <&cpg 323>;
+			status = "disabled";
+		};
+
+		iic3: i2c@e60b0000 {
+			/* doesn't need pinmux */
+			#address-cells = <1>;
+			#size-cells = <0>;
+			compatible = "renesas,iic-r8a7744";
+			reg = <0 0xe60b0000 0 0x425>;
+			interrupts = <GIC_SPI 173 IRQ_TYPE_LEVEL_HIGH>;
+			clocks = <&cpg CPG_MOD 926>;
+			dmas = <&dmac0 0x77>, <&dmac0 0x78>,
+			       <&dmac1 0x77>, <&dmac1 0x78>;
+			dma-names = "tx", "rx", "tx", "rx";
+			power-domains = <&sysc R8A7744_PD_ALWAYS_ON>;
+			resets = <&cpg 926>;
+			status = "disabled";
 		};
 
 		hsusb: usb@e6590000 {