renesas,rcar-i2c.yaml

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    1 # SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
    2 %YAML 1.2
    3 ---
    4 $id: http://devicetree.org/schemas/i2c/renesas,rcar-i2c.yaml#
    5 $schema: http://devicetree.org/meta-schemas/core.yaml#
    6 
    7 title: Renesas R-Car I2C Controller
    8 
    9 maintainers:
   10   - Wolfram Sang <wsa+renesas@sang-engineering.com>
   11 
   12 properties:
   13   compatible:
   14     oneOf:
   15       - items:
   16           - enum:
   17               - renesas,i2c-r8a7778      # R-Car M1A
   18               - renesas,i2c-r8a7779      # R-Car H1
   19           - const: renesas,rcar-gen1-i2c # R-Car Gen1
   20 
   21       - items:
   22           - enum:
   23               - renesas,i2c-r8a7742      # RZ/G1H
   24               - renesas,i2c-r8a7743      # RZ/G1M
   25               - renesas,i2c-r8a7744      # RZ/G1N
   26               - renesas,i2c-r8a7745      # RZ/G1E
   27               - renesas,i2c-r8a77470     # RZ/G1C
   28               - renesas,i2c-r8a7790      # R-Car H2
   29               - renesas,i2c-r8a7791      # R-Car M2-W
   30               - renesas,i2c-r8a7792      # R-Car V2H
   31               - renesas,i2c-r8a7793      # R-Car M2-N
   32               - renesas,i2c-r8a7794      # R-Car E2
   33           - const: renesas,rcar-gen2-i2c # R-Car Gen2 and RZ/G1
   34 
   35       - items:
   36           - enum:
   37               - renesas,i2c-r8a774a1     # RZ/G2M
   38               - renesas,i2c-r8a774b1     # RZ/G2N
   39               - renesas,i2c-r8a774c0     # RZ/G2E
   40               - renesas,i2c-r8a774e1     # RZ/G2H
   41               - renesas,i2c-r8a7795      # R-Car H3
   42               - renesas,i2c-r8a7796      # R-Car M3-W
   43               - renesas,i2c-r8a77961     # R-Car M3-W+
   44               - renesas,i2c-r8a77965     # R-Car M3-N
   45               - renesas,i2c-r8a77970     # R-Car V3M
   46               - renesas,i2c-r8a77980     # R-Car V3H
   47               - renesas,i2c-r8a77990     # R-Car E3
   48               - renesas,i2c-r8a77995     # R-Car D3
   49           - const: renesas,rcar-gen3-i2c # R-Car Gen3 and RZ/G2
   50 
   51       - items:
   52           - enum:
   53               - renesas,i2c-r8a779a0     # R-Car V3U
   54               - renesas,i2c-r8a779f0     # R-Car S4-8
   55           - const: renesas,rcar-gen4-i2c # R-Car Gen4
   56 
   57   reg:
   58     maxItems: 1
   59 
   60   interrupts:
   61     maxItems: 1
   62 
   63   clock-frequency:
   64     description:
   65       Desired I2C bus clock frequency in Hz. The absence of this property
   66       indicates the default frequency 100 kHz.
   67 
   68   clocks:
   69     maxItems: 1
   70 
   71   power-domains:
   72     maxItems: 1
   73 
   74   resets:
   75     maxItems: 1
   76 
   77   dmas:
   78     minItems: 2
   79     maxItems: 4
   80     description:
   81       Must contain a list of pairs of references to DMA specifiers, one for
   82       transmission, and one for reception.
   83 
   84   dma-names:
   85     minItems: 2
   86     maxItems: 4
   87     items:
   88       enum:
   89         - tx
   90         - rx
   91 
   92   i2c-scl-falling-time-ns:
   93     default: 35
   94     description:
   95       Number of nanoseconds the SCL signal takes to fall; t(f) in the I2C
   96       specification.
   97 
   98   i2c-scl-internal-delay-ns:
   99     default: 50
  100     description:
  101       Number of nanoseconds the IP core additionally needs to setup SCL.
  102 
  103   i2c-scl-rising-time-ns:
  104     default: 200
  105     description:
  106       Number of nanoseconds the SCL signal takes to rise; t(r) in the I2C
  107       specification.
  108 
  109 required:
  110   - compatible
  111   - reg
  112   - interrupts
  113   - clocks
  114   - power-domains
  115   - '#address-cells'
  116   - '#size-cells'
  117 
  118 allOf:
  119   - $ref: /schemas/i2c/i2c-controller.yaml#
  120 
  121   - if:
  122       properties:
  123         compatible:
  124           contains:
  125             enum:
  126               - renesas,rcar-gen1-i2c
  127               - renesas,rcar-gen2-i2c
  128     then:
  129       properties:
  130         dmas: false
  131         dma-names: false
  132 
  133   - if:
  134       properties:
  135         compatible:
  136           contains:
  137             enum:
  138               - renesas,rcar-gen2-i2c
  139               - renesas,rcar-gen3-i2c
  140               - renesas,rcar-gen4-i2c
  141     then:
  142       required:
  143         - resets
  144 
  145 unevaluatedProperties: false
  146 
  147 examples:
  148   - |
  149     #include <dt-bindings/clock/r8a7791-cpg-mssr.h>
  150     #include <dt-bindings/interrupt-controller/arm-gic.h>
  151     #include <dt-bindings/power/r8a7791-sysc.h>
  152 
  153     i2c0: i2c@e6508000 {
  154             #address-cells = <1>;
  155             #size-cells = <0>;
  156             compatible = "renesas,i2c-r8a7791", "renesas,rcar-gen2-i2c";
  157             reg = <0xe6508000 0x40>;
  158             interrupts = <GIC_SPI 287 IRQ_TYPE_LEVEL_HIGH>;
  159             clock-frequency = <400000>;
  160             clocks = <&cpg CPG_MOD 931>;
  161             power-domains = <&sysc R8A7791_PD_ALWAYS_ON>;
  162             resets = <&cpg 931>;
  163             i2c-scl-internal-delay-ns = <6>;
  164     };

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FreeBSD/Linux Kernel Cross Reference sys/contrib/device-tree/Bindings/i2c/renesas,rcar-i2c.yaml

FreeBSD/Linux Kernel Cross Reference
sys/contrib/device-tree/Bindings/i2c/renesas,rcar-i2c.yaml