Documentation/devicetree/bindings/i2c/renesas,i2c.txt

   1 I2C for R-Car platforms
   2
   3 Required properties:
   4 - compatible:
   5         "renesas,i2c-r8a7742" if the device is a part of a R8A7742 SoC.
   6         "renesas,i2c-r8a7743" if the device is a part of a R8A7743 SoC.
   7         "renesas,i2c-r8a7744" if the device is a part of a R8A7744 SoC.
   8         "renesas,i2c-r8a7745" if the device is a part of a R8A7745 SoC.
   9         "renesas,i2c-r8a77470" if the device is a part of a R8A77470 SoC.
  10         "renesas,i2c-r8a774a1" if the device is a part of a R8A774A1 SoC.
  11         "renesas,i2c-r8a774b1" if the device is a part of a R8A774B1 SoC.
  12         "renesas,i2c-r8a774c0" if the device is a part of a R8A774C0 SoC.
  13         "renesas,i2c-r8a774e1" if the device is a part of a R8A774E1 SoC.
  14         "renesas,i2c-r8a7778" if the device is a part of a R8A7778 SoC.
  15         "renesas,i2c-r8a7779" if the device is a part of a R8A7779 SoC.
  16         "renesas,i2c-r8a7790" if the device is a part of a R8A7790 SoC.
  17         "renesas,i2c-r8a7791" if the device is a part of a R8A7791 SoC.
  18         "renesas,i2c-r8a7792" if the device is a part of a R8A7792 SoC.
  19         "renesas,i2c-r8a7793" if the device is a part of a R8A7793 SoC.
  20         "renesas,i2c-r8a7794" if the device is a part of a R8A7794 SoC.
  21         "renesas,i2c-r8a7795" if the device is a part of a R8A7795 SoC.
  22         "renesas,i2c-r8a7796" if the device is a part of a R8A77960 SoC.
  23         "renesas,i2c-r8a77961" if the device is a part of a R8A77961 SoC.
  24         "renesas,i2c-r8a77965" if the device is a part of a R8A77965 SoC.
  25         "renesas,i2c-r8a77970" if the device is a part of a R8A77970 SoC.
  26         "renesas,i2c-r8a77980" if the device is a part of a R8A77980 SoC.
  27         "renesas,i2c-r8a77990" if the device is a part of a R8A77990 SoC.
  28         "renesas,i2c-r8a77995" if the device is a part of a R8A77995 SoC.
  29         "renesas,i2c-r8a779a0" if the device is a part of a R8A779A0 SoC.
  30         "renesas,rcar-gen1-i2c" for a generic R-Car Gen1 compatible device.
  31         "renesas,rcar-gen2-i2c" for a generic R-Car Gen2 or RZ/G1 compatible
  32                                 device.
  33         "renesas,rcar-gen3-i2c" for a generic R-Car Gen3 or RZ/G2 compatible
  34                                 device.
  35
  36         When compatible with the generic version, nodes must list the
  37         SoC-specific version corresponding to the platform first followed
  38         by the generic version.
  39
  40 - reg: physical base address of the controller and length of memory mapped
  41   region.
  42 - interrupts: interrupt specifier.
  43
  44 Optional properties:
  45 - clock-frequency: desired I2C bus clock frequency in Hz. The absence of this
  46   property indicates the default frequency 100 kHz.
  47 - clocks: clock specifier.
  48 - dmas: Must contain a list of two references to DMA specifiers, one for
  49   transmission, and one for reception.
  50 - dma-names: Must contain a list of two DMA names, "tx" and "rx".
  51
  52 - i2c-scl-falling-time-ns: see i2c.txt
  53 - i2c-scl-internal-delay-ns: see i2c.txt
  54 - i2c-scl-rising-time-ns: see i2c.txt
  55
  56 Examples :
  57
  58 i2c0: i2c@e6508000 {
  59         #address-cells = <1>;
  60         #size-cells = <0>;
  61         compatible = "renesas,i2c-r8a7791", "renesas,rcar-gen2-i2c";
  62         reg = <0 0xe6508000 0 0x40>;
  63         interrupts = <0 287 IRQ_TYPE_LEVEL_HIGH>;
  64         clocks = <&mstp9_clks R8A7791_CLK_I2C0>;
  65         clock-frequency = <400000>;
  66 };