1 # SPDX-License-Identifier: (GPL-2.0-only OR BS 1 # SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
2 %YAML 1.2 2 %YAML 1.2
3 --- 3 ---
4 $id: http://devicetree.org/schemas/serio/ps2-g 4 $id: http://devicetree.org/schemas/serio/ps2-gpio.yaml#
5 $schema: http://devicetree.org/meta-schemas/co 5 $schema: http://devicetree.org/meta-schemas/core.yaml#
6 6
7 title: GPIO based PS/2 7 title: GPIO based PS/2
8 8
9 maintainers: 9 maintainers:
10 - Danilo Krummrich <danilokrummrich@dk-develo 10 - Danilo Krummrich <danilokrummrich@dk-develop.de>
11 11
12 properties: 12 properties:
13 compatible: 13 compatible:
14 const: ps2-gpio 14 const: ps2-gpio
15 15
16 data-gpios: 16 data-gpios:
17 description: 17 description:
18 the gpio used for the data signal - this 18 the gpio used for the data signal - this should be flagged as
19 active high using open drain with (GPIO_ 19 active high using open drain with (GPIO_ACTIVE_HIGH | GPIO_OPEN_DRAIN)
20 from <dt-bindings/gpio/gpio.h> since the 20 from <dt-bindings/gpio/gpio.h> since the signal is open drain by
21 definition 21 definition
22 maxItems: 1 22 maxItems: 1
23 23
24 clk-gpios: 24 clk-gpios:
25 description: 25 description:
26 the gpio used for the clock signal - thi 26 the gpio used for the clock signal - this should be flagged as
27 active high using open drain with (GPIO_ 27 active high using open drain with (GPIO_ACTIVE_HIGH | GPIO_OPEN_DRAIN)
28 from <dt-bindings/gpio/gpio.h> since the 28 from <dt-bindings/gpio/gpio.h> since the signal is open drain by
29 definition 29 definition
30 maxItems: 1 30 maxItems: 1
31 31
32 interrupts: 32 interrupts:
33 description: 33 description:
34 The given interrupt should trigger on th 34 The given interrupt should trigger on the falling edge of the clock line.
35 maxItems: 1 35 maxItems: 1
36 36
37 write-enable: 37 write-enable:
38 type: boolean 38 type: boolean
39 description: 39 description:
40 Indicates whether write function is prov 40 Indicates whether write function is provided to serio device. Possibly
41 providing the write function will not wo 41 providing the write function will not work, because of the tough timing
42 requirements. 42 requirements.
43 43
44 required: 44 required:
45 - compatible 45 - compatible
46 - data-gpios 46 - data-gpios
47 - clk-gpios 47 - clk-gpios
48 - interrupts 48 - interrupts
49 49
50 additionalProperties: false 50 additionalProperties: false
51 51
52 examples: 52 examples:
53 - | 53 - |
54 #include <dt-bindings/gpio/gpio.h> 54 #include <dt-bindings/gpio/gpio.h>
55 #include <dt-bindings/interrupt-controller 55 #include <dt-bindings/interrupt-controller/irq.h>
56 56
57 ps2 { 57 ps2 {
58 compatible = "ps2-gpio"; 58 compatible = "ps2-gpio";
59 interrupt-parent = <&gpio>; 59 interrupt-parent = <&gpio>;
60 interrupts = <23 IRQ_TYPE_EDGE_FALLING 60 interrupts = <23 IRQ_TYPE_EDGE_FALLING>;
61 data-gpios = <&gpio 24 (GPIO_ACTIVE_HI 61 data-gpios = <&gpio 24 (GPIO_ACTIVE_HIGH | GPIO_OPEN_DRAIN)>;
62 clk-gpios = <&gpio 23 (GPIO_ACTIVE_HIG 62 clk-gpios = <&gpio 23 (GPIO_ACTIVE_HIGH | GPIO_OPEN_DRAIN)>;
63 write-enable; 63 write-enable;
64 }; 64 };
Linux® is a registered trademark of Linus Torvalds in the United States and other countries.
TOMOYO® is a registered trademark of NTT DATA CORPORATION.