xref: /freebsd/sys/contrib/device-tree/Bindings/gpio/fairchild,74hc595.yaml (revision b077aed33b7b6aefca7b17ddb250cf521f938613) 
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    $ref: /schemas/types.yaml#/definitions/uint32
30    description: Number of daisy-chained shift registers
31
32  enable-gpios:
33    description: GPIO connected to the OE (Output Enable) pin.
34    maxItems: 1
35
36  spi-max-frequency: true
37
38patternProperties:
39  "^(hog-[0-9]+|.+-hog(-[0-9]+)?)$":
40    type: object
41
42    properties:
43      gpio-hog: true
44      gpios: true
45      output-high: true
46      output-low: true
47      line-name: true
48
49    required:
50      - gpio-hog
51      - gpios
52
53    additionalProperties: false
54
55required:
56  - compatible
57  - reg
58  - gpio-controller
59  - '#gpio-cells'
60  - registers-number
61
62additionalProperties: false
63
64examples:
65  - |
66    spi {
67            #address-cells = <1>;
68            #size-cells = <0>;
69
70            gpio5: gpio5@0 {
71                    compatible = "fairchild,74hc595";
72                    reg = <0>;
73                    gpio-controller;
74                    #gpio-cells = <2>;
75                    registers-number = <4>;
76                    spi-max-frequency = <100000>;
77            };
78    };
79