Documentation/devicetree/bindings/i2c/renesas,iic.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-r8a774b1" (RZ/G2N)
  12                         - "renesas,iic-r8a774c0" (RZ/G2E)
  13                         - "renesas,iic-r8a7790" (R-Car H2)
  14                         - "renesas,iic-r8a7791" (R-Car M2-W)
  15                         - "renesas,iic-r8a7792" (R-Car V2H)
  16                         - "renesas,iic-r8a7793" (R-Car M2-N)
  17                         - "renesas,iic-r8a7794" (R-Car E2)
  18                         - "renesas,iic-r8a7795" (R-Car H3)
  19                         - "renesas,iic-r8a7796" (R-Car M3-W)
  20                         - "renesas,iic-r8a77965" (R-Car M3-N)
  21                         - "renesas,iic-r8a77990" (R-Car E3)
  22                         - "renesas,iic-sh73a0" (SH-Mobile AG5)
  23                         - "renesas,rcar-gen2-iic" (generic R-Car Gen2 or RZ/G1
  24                                                         compatible device)
  25                         - "renesas,rcar-gen3-iic" (generic R-Car Gen3 or RZ/G2
  26                                                         compatible device)
  27                         - "renesas,rmobile-iic" (generic device)
  28
  29                         When compatible with a generic R-Car version, nodes
  30                         must list the SoC-specific version corresponding to
  31                         the platform first followed by the generic R-Car
  32                         version.
  33
  34                         When compatible with "renesas,rmobile-iic" it should
  35                         be the last compatibility string listed.
  36
  37                         The r8a77990 (R-Car E3) and r8a774c0 (RZ/G2E)
  38                         controllers are not considered compatible with
  39                         "renesas,rcar-gen3-iic" or "renesas,rmobile-iic"
  40                         due to the absence of automatic transmission registers.
  41
  42 - reg             : address start and address range size of device
  43 - interrupts      : interrupt of device
  44 - clocks          : clock for device
  45 - #address-cells  : should be <1>
  46 - #size-cells     : should be <0>
  47
  48 Optional properties:
  49 - clock-frequency : frequency of bus clock in Hz. Default 100kHz if unset.
  50 - dmas            : Must contain a list of two references to DMA
  51                     specifiers, one for transmission, and one for
  52                     reception.
  53 - dma-names       : Must contain a list of two DMA names, "tx" and "rx".
  54
  55
  56 Pinctrl properties might be needed, too. See there.
  57
  58 Example:
  59
  60         iic0: i2c@e6500000 {
  61                 compatible = "renesas,iic-r8a7790", "renesas,rcar-gen2-iic",
  62                              "renesas,rmobile-iic";
  63                 reg = <0 0xe6500000 0 0x425>;
  64                 interrupts = <0 174 IRQ_TYPE_LEVEL_HIGH>;
  65                 clocks = <&mstp3_clks R8A7790_CLK_IIC0>;
  66                 clock-frequency = <400000>;
  67                 #address-cells = <1>;
  68                 #size-cells = <0>;
  69         };