Documentation/devicetree/bindings/gpio/fairchild,74hc595.yaml

   1 # SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
   2 %YAML 1.2
   3 ---
   4 $id: http://devicetree.org/schemas/gpio/fairchild,74hc595.yaml#
   5 $schema: http://devicetree.org/meta-schemas/core.yaml#
   6
   7 title: Generic 8-bit shift register
   8
   9 maintainers:
  10   - Maxime Ripard <mripard@kernel.org>
  11
  12 properties:
  13   compatible:
  14     enum:
  15       - fairchild,74hc595
  16       - nxp,74lvc594
  17
  18   reg:
  19     maxItems: 1
  20
  21   gpio-controller: true
  22
  23   '#gpio-cells':
  24     description:
  25       The second cell is only used to specify the GPIO polarity.
  26     const: 2
  27
  28   registers-number:
  29     $ref: /schemas/types.yaml#/definitions/uint32
  30     description: Number of daisy-chained shift registers
  31
  32   enable-gpios:
  33     description: GPIO connected to the OE (Output Enable) pin.
  34     maxItems: 1
  35
  36 patternProperties:
  37   "^(hog-[0-9]+|.+-hog(-[0-9]+)?)$":
  38     type: object
  39
  40     properties:
  41       gpio-hog: true
  42       gpios: true
  43       output-high: true
  44       output-low: true
  45       line-name: true
  46
  47     required:
  48       - gpio-hog
  49       - gpios
  50
  51     additionalProperties: false
  52
  53 required:
  54   - compatible
  55   - reg
  56   - gpio-controller
  57   - '#gpio-cells'
  58   - registers-number
  59
  60 allOf:
  61   - $ref: /schemas/spi/spi-peripheral-props.yaml#
  62
  63 unevaluatedProperties: false
  64
  65 examples:
  66   - |
  67     spi {
  68             #address-cells = <1>;
  69             #size-cells = <0>;
  70
  71             gpio5: gpio5@0 {
  72                     compatible = "fairchild,74hc595";
  73                     reg = <0>;
  74                     gpio-controller;
  75                     #gpio-cells = <2>;
  76                     registers-number = <4>;
  77                     spi-max-frequency = <100000>;
  78             };
  79     };