Documentation/devicetree/bindings/i2c/i2c-sh_mobile.txt

   1 Device tree configuration for Renesas IIC (sh_mobile) driver
   2
   3 Required properties:
   4 - compatible      :
   5                         - "renesas,iic-r8a73a4" (R-Mobile APE6)
   6                         - "renesas,iic-r8a7740" (R-Mobile A1)
   7                         - "renesas,iic-r8a7743" (RZ/G1M)
   8                         - "renesas,iic-r8a7744" (RZ/G1N)
   9                         - "renesas,iic-r8a7745" (RZ/G1E)
  10                         - "renesas,iic-r8a774a1" (RZ/G2M)
  11                         - "renesas,iic-r8a7790" (R-Car H2)
  12                         - "renesas,iic-r8a7791" (R-Car M2-W)
  13                         - "renesas,iic-r8a7792" (R-Car V2H)
  14                         - "renesas,iic-r8a7793" (R-Car M2-N)
  15                         - "renesas,iic-r8a7794" (R-Car E2)
  16                         - "renesas,iic-r8a7795" (R-Car H3)
  17                         - "renesas,iic-r8a7796" (R-Car M3-W)
  18                         - "renesas,iic-r8a77965" (R-Car M3-N)
  19                         - "renesas,iic-r8a77990" (R-Car E3)
  20                         - "renesas,iic-sh73a0" (SH-Mobile AG5)
  21                         - "renesas,rcar-gen2-iic" (generic R-Car Gen2 or RZ/G1
  22                                                         compatible device)
  23                         - "renesas,rcar-gen3-iic" (generic R-Car Gen3 or RZ/G2
  24                                                         compatible device)
  25                         - "renesas,rmobile-iic" (generic device)
  26
  27                         When compatible with a generic R-Car version, nodes
  28                         must list the SoC-specific version corresponding to
  29                         the platform first followed by the generic R-Car
  30                         version.
  31
  32                         When compatible with "renesas,rmobile-iic" it should
  33                         be the last compatibility string listed.
  34
  35                         The r8a77990 (R-Car E3) controller is not
  36                         considered compatible with "renesas,rcar-gen3-iic"
  37                         or "renesas,rmobile-iic" due to the absence of
  38                         automatic transmission registers.
  39
  40 - reg             : address start and address range size of device
  41 - interrupts      : interrupt of device
  42 - clocks          : clock for device
  43 - #address-cells  : should be <1>
  44 - #size-cells     : should be <0>
  45
  46 Optional properties:
  47 - clock-frequency : frequency of bus clock in Hz. Default 100kHz if unset.
  48 - dmas            : Must contain a list of two references to DMA
  49                     specifiers, one for transmission, and one for
  50                     reception.
  51 - dma-names       : Must contain a list of two DMA names, "tx" and "rx".
  52
  53
  54 Pinctrl properties might be needed, too. See there.
  55
  56 Example:
  57
  58         iic0: i2c@e6500000 {
  59                 compatible = "renesas,iic-r8a7790", "renesas,rcar-gen2-iic",
  60                              "renesas,rmobile-iic";
  61                 reg = <0 0xe6500000 0 0x425>;
  62                 interrupts = <0 174 IRQ_TYPE_LEVEL_HIGH>;
  63                 clocks = <&mstp3_clks R8A7790_CLK_IIC0>;
  64                 clock-frequency = <400000>;
  65                 #address-cells = <1>;
  66                 #size-cells = <0>;
  67         };