Documentation/devicetree/bindings/iio/potentiometer/renesas,x9250.yaml

   1 # SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
   2 %YAML 1.2
   3 ---
   4 $id: http://devicetree.org/schemas/iio/potentiometer/renesas,x9250.yaml#
   5 $schema: http://devicetree.org/meta-schemas/core.yaml#
   6
   7 title: Renesas X9250 quad potentiometers
   8
   9 maintainers:
  10   - Herve Codina <herve.codina@bootlin.com>
  11
  12 description:
  13   The Renesas X9250 integrates four digitally controlled potentiometers.
  14   On each potentiometer, the X9250T has a 100 kOhms total resistance and the
  15   X9250U has a 50 kOhms total resistance.
  16
  17 allOf:
  18   - $ref: /schemas/spi/spi-peripheral-props.yaml
  19
  20 properties:
  21   compatible:
  22     enum:
  23       - renesas,x9250t
  24       - renesas,x9250u
  25
  26   reg:
  27     maxItems: 1
  28
  29   vcc-supply:
  30     description:
  31       Regulator for the VCC power supply.
  32
  33   avp-supply:
  34     description:
  35       Regulator for the analog V+ power supply.
  36
  37   avn-supply:
  38     description:
  39       Regulator for the analog V- power supply.
  40
  41   '#io-channel-cells':
  42     const: 1
  43
  44   spi-max-frequency:
  45     maximum: 2000000
  46
  47   wp-gpios:
  48     maxItems: 1
  49     description:
  50       GPIO connected to the write-protect pin.
  51
  52 required:
  53   - compatible
  54   - reg
  55   - vcc-supply
  56   - avp-supply
  57   - avn-supply
  58   - '#io-channel-cells'
  59
  60 unevaluatedProperties: false
  61
  62 examples:
  63   - |
  64     #include <dt-bindings/gpio/gpio.h>
  65     spi {
  66         #address-cells = <1>;
  67         #size-cells = <0>;
  68         potentiometer@0 {
  69             compatible = "renesas,x9250t";
  70             reg = <0>;
  71             vcc-supply = <&vcc_regulator>;
  72             avp-supply = <&avp_regulator>;
  73             avn-supply = <&avp_regulator>;
  74             wp-gpios = <&gpio 1 GPIO_ACTIVE_LOW>;
  75             spi-max-frequency = <2000000>;
  76             #io-channel-cells = <1>;
  77         };
  78     };