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

     # SPDX-License-Identifier: (GPL-2.0 OR BSD-2-Clause)
     %YAML 1.2
     ---
     $id: http://devicetree.org/schemas/iio/adc/renesas,rcar-gyroadc.yaml#
     $schema: http://devicetree.org/meta-schemas/core.yaml#
     
     title: Renesas R-Car GyroADC
     
     maintainers:
      - Marek Vasut <marek.vasut+renesas@gmail.com>
    
    description: |
      The GyroADC block is a reduced SPI block with up to 8 chipselect lines,
      which supports the SPI protocol of a selected few SPI ADCs. The SPI ADCs
      are sampled by the GyroADC block in a round-robin fashion and the result
      presented in the GyroADC registers.
      The ADC bindings should match with that of the devices connected to a
      full featured SPI bus.
    
    properties:
      compatible:
        items:
          - enum:
              - renesas,r8a7791-gyroadc
              - renesas,r8a7792-gyroadc
          - const: renesas,rcar-gyroadc
    
      reg:
        maxItems: 1
    
      clocks:
        maxItems: 1
    
      clock-names:
        const: fck
    
      power-domains: true
    
      resets: true
    
      "#address-cells":
        const: 1
    
      "#size-cells":
        const: 0
    
    additionalProperties: false
    
    required:
      - compatible
      - reg
      - clocks
      - clock-names
      - "#address-cells"
      - "#size-cells"
    
    patternProperties:
      "@[0-7]$":
        type: object
        properties:
          compatible:
            description: |
              fujitsu,mb88101a
              - Fujitsu MB88101A compatible mode,
                12bit sampling, up to 4 channels can be sampled in round-robin
                fashion. One Fujitsu chip supplies four GyroADC channels with
                data as it contains four ADCs on the chip and thus for 4-channel
                operation, single MB88101A is required. The Cx chipselect lines
                of the MB88101A connect directly to two CHS lines of the GyroADC,
                no demuxer is required. The data out line of each MB88101A
                connects to a shared input pin of the GyroADC.
              ti,adcs7476 or ti,adc121 or adi,ad7476
              - TI ADCS7476 / TI ADC121 / ADI AD7476 compatible mode, 15bit
                sampling, up to 8 channels can be sampled in round-robin
                fashion. One TI/ADI chip supplies single ADC channel with data,
                thus for 8-channel operation, 8 chips are required.
                A 3:8 chipselect demuxer is  required to connect the nCS line
                of the TI/ADI chips to the GyroADC, while MISO line of each
                TI/ADI ADC connects to a shared input pin of the GyroADC.
              maxim,max1162 or maxim,max11100
              - Maxim MAX1162 / Maxim MAX11100 compatible mode,  16bit sampling,
                up to 8 channels can be sampled in round-robin fashion. One
                Maxim chip supplies single ADC channel with data, thus for
                8-channel operation, 8 chips are required.
                A 3:8 chipselect demuxer is required to connect the nCS line
                of the MAX chips to the GyroADC, while MISO line of each Maxim
                ADC connects to a shared input pin of the GyroADC.
            enum:
              - adi,7476
              - fujitsu,mb88101a
              - maxim,max1162
              - maxim,max11100
              - ti,adcs7476
              - ti,adc121
    
          reg:
            minimum: 0
            maximum: 7
    
         vref-supply: true
   
       additionalProperties: false
   
       required:
         - compatible
         - reg
         - vref-supply
   
   examples:
     - |
       #include <dt-bindings/clock/r8a7791-clock.h>
       #include <dt-bindings/power/r8a7791-sysc.h>
       soc {
           #address-cells = <2>;
           #size-cells = <2>;
   
           adc@e6e54000 {
               compatible = "renesas,r8a7791-gyroadc", "renesas,rcar-gyroadc";
               reg = <0 0xe6e54000 0 64>;
               clocks = <&mstp9_clks R8A7791_CLK_GYROADC>;
               clock-names = "fck";
               power-domains = <&sysc R8A7791_PD_ALWAYS_ON>;
   
               pinctrl-0 = <&adc_pins>;
               pinctrl-names = "default";
   
               #address-cells = <1>;
               #size-cells = <0>;
   
               adc@0 {
                   reg = <0>;
                   compatible = "maxim,max1162";
                   vref-supply = <&vref_max1162>;
               };
   
               adc@1 {
                   reg = <1>;
                   compatible = "maxim,max1162";
                   vref-supply = <&vref_max1162>;
               };
           };
       };
   ...

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