xref: /linux/Documentation/devicetree/bindings/gpio/fairchild,74hc595.yaml (revision 566ab427f827b0256d3e8ce0235d088e6a9c28bd) 
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
7title: Generic 8-bit shift register
8
9maintainers:
10  - Maxime Ripard <mripard@kernel.org>
11
12properties:
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    $ref: /schemas/types.yaml#/definitions/uint32
30    description: Number of daisy-chained shift registers
31
32  enable-gpios:
33    description: GPIO connected to the OE (Output Enable) pin.
34    maxItems: 1
35
36patternProperties:
37  "^(hog-[0-9]+|.+-hog(-[0-9]+)?)$":
38    type: object
39    required:
40      - gpio-hog
41
42required:
43  - compatible
44  - reg
45  - gpio-controller
46  - '#gpio-cells'
47  - registers-number
48
49allOf:
50  - $ref: /schemas/spi/spi-peripheral-props.yaml#
51
52unevaluatedProperties: false
53
54examples:
55  - |
56    spi {
57            #address-cells = <1>;
58            #size-cells = <0>;
59
60            gpio5: gpio5@0 {
61                    compatible = "fairchild,74hc595";
62                    reg = <0>;
63                    gpio-controller;
64                    #gpio-cells = <2>;
65                    registers-number = <4>;
66                    spi-max-frequency = <100000>;
67            };
68    };
69