Device tree configuration for Renesas RIIC driver Required properties: - compatible : "renesas,riic-". "renesas,riic-rz" as fallback - reg : address start and address range size of device - interrupts : 8 interrupts (TEI, RI, TI, SPI, STI, NAKI, ALI, TMOI) - clock-frequency : frequency of bus clock in Hz - #address-cells : should be <1> - #size-cells : should be <0> Pinctrl properties might be needed, too. See there. Example: i2c0: i2c@fcfee000 { compatible = "renesas,riic-r7s72100", "renesas,riic-rz"; reg = <0xfcfee000 0x44>; interrupts = <0 157 IRQ_TYPE_LEVEL_HIGH>, <0 158 IRQ_TYPE_EDGE_RISING>, <0 159 IRQ_TYPE_EDGE_RISING>, <0 160 IRQ_TYPE_LEVEL_HIGH>, <0 161 IRQ_TYPE_LEVEL_HIGH>, <0 162 IRQ_TYPE_LEVEL_HIGH>, <0 163 IRQ_TYPE_LEVEL_HIGH>, <0 164 IRQ_TYPE_LEVEL_HIGH>; clock-frequency = <100000>; #address-cells = <1>; #size-cells = <0>; };