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