renesas,iic.txt

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    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-r8a7742" (RZ/G1H)
    8                         - "renesas,iic-r8a7743" (RZ/G1M)
    9                         - "renesas,iic-r8a7744" (RZ/G1N)
   10                         - "renesas,iic-r8a7745" (RZ/G1E)
   11                         - "renesas,iic-r8a774a1" (RZ/G2M)
   12                         - "renesas,iic-r8a774b1" (RZ/G2N)
   13                         - "renesas,iic-r8a774c0" (RZ/G2E)
   14                         - "renesas,iic-r8a774e1" (RZ/G2H)
   15                         - "renesas,iic-r8a7790" (R-Car H2)
   16                         - "renesas,iic-r8a7791" (R-Car M2-W)
   17                         - "renesas,iic-r8a7792" (R-Car V2H)
   18                         - "renesas,iic-r8a7793" (R-Car M2-N)
   19                         - "renesas,iic-r8a7794" (R-Car E2)
   20                         - "renesas,iic-r8a7795" (R-Car H3)
   21                         - "renesas,iic-r8a7796" (R-Car M3-W)
   22                         - "renesas,iic-r8a77961" (R-Car M3-W+)
   23                         - "renesas,iic-r8a77965" (R-Car M3-N)
   24                         - "renesas,iic-r8a77990" (R-Car E3)
   25                         - "renesas,iic-sh73a0" (SH-Mobile AG5)
   26                         - "renesas,rcar-gen2-iic" (generic R-Car Gen2 or RZ/G1
   27                                                         compatible device)
   28                         - "renesas,rcar-gen3-iic" (generic R-Car Gen3 or RZ/G2
   29                                                         compatible device)
   30                         - "renesas,rmobile-iic" (generic device)
   31 
   32                         When compatible with a generic R-Car version, nodes
   33                         must list the SoC-specific version corresponding to
   34                         the platform first followed by the generic R-Car
   35                         version.
   36 
   37                         When compatible with "renesas,rmobile-iic" it should
   38                         be the last compatibility string listed.
   39 
   40                         The r8a77990 (R-Car E3) and r8a774c0 (RZ/G2E)
   41                         controllers are not considered compatible with
   42                         "renesas,rcar-gen3-iic" or "renesas,rmobile-iic"
   43                         due to the absence of automatic transmission registers.
   44 
   45 - reg             : address start and address range size of device
   46 - interrupts      : interrupt of device
   47 - clocks          : clock for device
   48 - #address-cells  : should be <1>
   49 - #size-cells     : should be <0>
   50 
   51 Optional properties:
   52 - clock-frequency : frequency of bus clock in Hz. Default 100kHz if unset.
   53 - dmas            : Must contain a list of two references to DMA
   54                     specifiers, one for transmission, and one for
   55                     reception.
   56 - dma-names       : Must contain a list of two DMA names, "tx" and "rx".
   57 
   58 
   59 Pinctrl properties might be needed, too. See there.
   60 
   61 Example:
   62 
   63         iic0: i2c@e6500000 {
   64                 compatible = "renesas,iic-r8a7790", "renesas,rcar-gen2-iic",
   65                              "renesas,rmobile-iic";
   66                 reg = <0 0xe6500000 0 0x425>;
   67                 interrupts = <0 174 IRQ_TYPE_LEVEL_HIGH>;
   68                 clocks = <&mstp3_clks R8A7790_CLK_IIC0>;
   69                 clock-frequency = <400000>;
   70                 #address-cells = <1>;
   71                 #size-cells = <0>;
   72         };

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sys/contrib/device-tree/Bindings/i2c/renesas,iic.txt