1 # SPDX-License-Identifier: GPL-2.0 1 # SPDX-License-Identifier: GPL-2.0
2 %YAML 1.2 2 %YAML 1.2
3 --- 3 ---
4 $id: http://devicetree.org/schemas/spi/spi-gpi 4 $id: http://devicetree.org/schemas/spi/spi-gpio.yaml#
5 $schema: http://devicetree.org/meta-schemas/co 5 $schema: http://devicetree.org/meta-schemas/core.yaml#
6 6
7 title: SPI-GPIO 7 title: SPI-GPIO
8 8
9 maintainers: 9 maintainers:
10 - Rob Herring <robh@kernel.org> 10 - Rob Herring <robh@kernel.org>
11 11
12 description: 12 description:
13 This represents a group of 3-n GPIO lines us 13 This represents a group of 3-n GPIO lines used for bit-banged SPI on
14 dedicated GPIO lines. 14 dedicated GPIO lines.
15 15
16 allOf: 16 allOf:
17 - $ref: /schemas/spi/spi-controller.yaml# 17 - $ref: /schemas/spi/spi-controller.yaml#
18 18
19 properties: 19 properties:
20 compatible: 20 compatible:
21 const: spi-gpio 21 const: spi-gpio
22 22
23 sck-gpios: 23 sck-gpios:
24 description: GPIO spec for the SCK line to 24 description: GPIO spec for the SCK line to use
25 maxItems: 1 25 maxItems: 1
26 26
27 miso-gpios: 27 miso-gpios:
28 description: GPIO spec for the MISO line t 28 description: GPIO spec for the MISO line to use
29 maxItems: 1 29 maxItems: 1
30 30
31 mosi-gpios: 31 mosi-gpios:
32 description: GPIO spec for the MOSI line t 32 description: GPIO spec for the MOSI line to use
33 maxItems: 1 33 maxItems: 1
34 34
35 cs-gpios: 35 cs-gpios:
36 description: GPIOs to use for chipselect l 36 description: GPIOs to use for chipselect lines.
37 Not needed if num-chipselects = <0>. 37 Not needed if num-chipselects = <0>.
38 minItems: 1 38 minItems: 1
39 maxItems: 1024 39 maxItems: 1024
40 40
41 num-chipselects: 41 num-chipselects:
42 description: Number of chipselect lines. S 42 description: Number of chipselect lines. Should be <0> if a single device
43 with no chip select is connected. 43 with no chip select is connected.
44 $ref: /schemas/types.yaml#/definitions/uin 44 $ref: /schemas/types.yaml#/definitions/uint32
45 45
46 # Deprecated properties 46 # Deprecated properties
47 gpio-sck: false 47 gpio-sck: false
48 gpio-miso: false 48 gpio-miso: false
49 gpio-mosi: false 49 gpio-mosi: false
50 50
51 required: 51 required:
52 - compatible 52 - compatible
53 - num-chipselects 53 - num-chipselects
54 - sck-gpios 54 - sck-gpios
55 55
56 unevaluatedProperties: false 56 unevaluatedProperties: false
57 57
58 examples: 58 examples:
59 - | 59 - |
60 spi { 60 spi {
61 compatible = "spi-gpio"; 61 compatible = "spi-gpio";
62 #address-cells = <0x1>; 62 #address-cells = <0x1>;
63 #size-cells = <0x0>; 63 #size-cells = <0x0>;
64 64
65 sck-gpios = <&gpio 95 0>; 65 sck-gpios = <&gpio 95 0>;
66 miso-gpios = <&gpio 98 0>; 66 miso-gpios = <&gpio 98 0>;
67 mosi-gpios = <&gpio 97 0>; 67 mosi-gpios = <&gpio 97 0>;
68 cs-gpios = <&gpio 125 0>; 68 cs-gpios = <&gpio 125 0>;
69 num-chipselects = <1>; 69 num-chipselects = <1>;
70 70
71 /* clients */ 71 /* clients */
72 }; 72 };
73 73
74 ... 74 ...
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