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+Device tree configuration for Renesas IIC (sh_mobile) driver
+
+Required properties:
+- compatible :
+ - "renesas,iic-r8a73a4" (R-Mobile APE6)
+ - "renesas,iic-r8a7740" (R-Mobile A1)
+ - "renesas,iic-r8a7742" (RZ/G1H)
+ - "renesas,iic-r8a7743" (RZ/G1M)
+ - "renesas,iic-r8a7744" (RZ/G1N)
+ - "renesas,iic-r8a7745" (RZ/G1E)
+ - "renesas,iic-r8a774a1" (RZ/G2M)
+ - "renesas,iic-r8a774b1" (RZ/G2N)
+ - "renesas,iic-r8a774c0" (RZ/G2E)
+ - "renesas,iic-r8a774e1" (RZ/G2H)
+ - "renesas,iic-r8a7790" (R-Car H2)
+ - "renesas,iic-r8a7791" (R-Car M2-W)
+ - "renesas,iic-r8a7792" (R-Car V2H)
+ - "renesas,iic-r8a7793" (R-Car M2-N)
+ - "renesas,iic-r8a7794" (R-Car E2)
+ - "renesas,iic-r8a7795" (R-Car H3)
+ - "renesas,iic-r8a7796" (R-Car M3-W)
+ - "renesas,iic-r8a77961" (R-Car M3-W+)
+ - "renesas,iic-r8a77965" (R-Car M3-N)
+ - "renesas,iic-r8a77990" (R-Car E3)
+ - "renesas,iic-sh73a0" (SH-Mobile AG5)
+ - "renesas,rcar-gen2-iic" (generic R-Car Gen2 or RZ/G1
+ compatible device)
+ - "renesas,rcar-gen3-iic" (generic R-Car Gen3 or RZ/G2
+ compatible device)
+ - "renesas,rmobile-iic" (generic device)
+
+ When compatible with a generic R-Car version, nodes
+ must list the SoC-specific version corresponding to
+ the platform first followed by the generic R-Car
+ version.
+
+ When compatible with "renesas,rmobile-iic" it should
+ be the last compatibility string listed.
+
+ The r8a77990 (R-Car E3) and r8a774c0 (RZ/G2E)
+ controllers are not considered compatible with
+ "renesas,rcar-gen3-iic" or "renesas,rmobile-iic"
+ due to the absence of automatic transmission registers.
+
+- reg : address start and address range size of device
+- interrupts : interrupt of device
+- clocks : clock for device
+- #address-cells : should be <1>
+- #size-cells : should be <0>
+
+Optional properties:
+- clock-frequency : frequency of bus clock in Hz. Default 100kHz if unset.
+- dmas : Must contain a list of two references to DMA
+ specifiers, one for transmission, and one for
+ reception.
+- dma-names : Must contain a list of two DMA names, "tx" and "rx".
+
+
+Pinctrl properties might be needed, too. See there.
+
+Example:
+
+ iic0: i2c@e6500000 {
+ compatible = "renesas,iic-r8a7790", "renesas,rcar-gen2-iic",
+ "renesas,rmobile-iic";
+ reg = <0 0xe6500000 0 0x425>;
+ interrupts = <0 174 IRQ_TYPE_LEVEL_HIGH>;
+ clocks = <&mstp3_clks R8A7790_CLK_IIC0>;
+ clock-frequency = <400000>;
+ #address-cells = <1>;
+ #size-cells = <0>;
+ };