1I2C for R-Car platforms 2 3Required properties: 4- compatible: 5 "renesas,i2c-r8a7743" if the device is a part of a R8A7743 SoC. 6 "renesas,i2c-r8a7744" if the device is a part of a R8A7744 SoC. 7 "renesas,i2c-r8a7745" if the device is a part of a R8A7745 SoC. 8 "renesas,i2c-r8a77470" if the device is a part of a R8A77470 SoC. 9 "renesas,i2c-r8a774a1" if the device is a part of a R8A774A1 SoC. 10 "renesas,i2c-r8a774c0" if the device is a part of a R8A774C0 SoC. 11 "renesas,i2c-r8a7778" if the device is a part of a R8A7778 SoC. 12 "renesas,i2c-r8a7779" if the device is a part of a R8A7779 SoC. 13 "renesas,i2c-r8a7790" if the device is a part of a R8A7790 SoC. 14 "renesas,i2c-r8a7791" if the device is a part of a R8A7791 SoC. 15 "renesas,i2c-r8a7792" if the device is a part of a R8A7792 SoC. 16 "renesas,i2c-r8a7793" if the device is a part of a R8A7793 SoC. 17 "renesas,i2c-r8a7794" if the device is a part of a R8A7794 SoC. 18 "renesas,i2c-r8a7795" if the device is a part of a R8A7795 SoC. 19 "renesas,i2c-r8a7796" if the device is a part of a R8A7796 SoC. 20 "renesas,i2c-r8a77965" if the device is a part of a R8A77965 SoC. 21 "renesas,i2c-r8a77970" if the device is a part of a R8A77970 SoC. 22 "renesas,i2c-r8a77980" if the device is a part of a R8A77980 SoC. 23 "renesas,i2c-r8a77990" if the device is a part of a R8A77990 SoC. 24 "renesas,i2c-r8a77995" if the device is a part of a R8A77995 SoC. 25 "renesas,rcar-gen1-i2c" for a generic R-Car Gen1 compatible device. 26 "renesas,rcar-gen2-i2c" for a generic R-Car Gen2 or RZ/G1 compatible 27 device. 28 "renesas,rcar-gen3-i2c" for a generic R-Car Gen3 or RZ/G2 compatible 29 device. 30 "renesas,i2c-rcar" (deprecated) 31 32 When compatible with the generic version, nodes must list the 33 SoC-specific version corresponding to the platform first followed 34 by the generic version. 35 36- reg: physical base address of the controller and length of memory mapped 37 region. 38- interrupts: interrupt specifier. 39 40Optional properties: 41- clock-frequency: desired I2C bus clock frequency in Hz. The absence of this 42 property indicates the default frequency 100 kHz. 43- clocks: clock specifier. 44- dmas: Must contain a list of two references to DMA specifiers, one for 45 transmission, and one for reception. 46- dma-names: Must contain a list of two DMA names, "tx" and "rx". 47 48- i2c-scl-falling-time-ns: see i2c.txt 49- i2c-scl-internal-delay-ns: see i2c.txt 50- i2c-scl-rising-time-ns: see i2c.txt 51 52Examples : 53 54i2c0: i2c@e6508000 { 55 #address-cells = <1>; 56 #size-cells = <0>; 57 compatible = "renesas,i2c-r8a7791", "renesas,rcar-gen2-i2c"; 58 reg = <0 0xe6508000 0 0x40>; 59 interrupts = <0 287 IRQ_TYPE_LEVEL_HIGH>; 60 clocks = <&mstp9_clks R8A7791_CLK_I2C0>; 61 clock-frequency = <400000>; 62}; 63