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 required:
40 - gpio-hog
41
42 required:
43 - compatible
44 - reg
45 - gpio-controller
46 - '#gpio-cells'
47 - registers-number
48
49 allOf:
50 - $ref: /schemas/spi/spi-peripheral-props.yaml#
51
52 unevaluatedProperties: false
53
54 examples:
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 };
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