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fd05d089 DJ |
1 | Device-Tree bindings for input/gpio_keys.c keyboard driver |
2 | ||
3 | Required properties: | |
4 | - compatible = "gpio-keys"; | |
5 | ||
6 | Optional properties: | |
7 | - autorepeat: Boolean, Enable auto repeat feature of Linux input | |
8 | subsystem. | |
c4dc5f8c | 9 | - label: String, name of the input device. |
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10 | |
11 | Each button (key) is represented as a sub-node of "gpio-keys": | |
12 | Subnode properties: | |
13 | ||
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14 | - gpios: OF device-tree gpio specification. |
15 | - interrupts: the interrupt line for that input. | |
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16 | - label: Descriptive name of the key. |
17 | - linux,code: Keycode to emit. | |
18 | ||
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19 | Note that either "interrupts" or "gpios" properties can be omitted, but not |
20 | both at the same time. Specifying both properties is allowed. | |
f2d347ff | 21 | |
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22 | Optional subnode-properties: |
23 | - linux,input-type: Specify event type this button/key generates. | |
24 | If not specified defaults to <1> == EV_KEY. | |
25 | - debounce-interval: Debouncing interval time in milliseconds. | |
26 | If not specified defaults to 5. | |
99b4ffbd | 27 | - wakeup-source: Boolean, button can wake-up the system. |
71a0151c | 28 | (Legacy property supported: "gpio-key,wakeup") |
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29 | - linux,can-disable: Boolean, indicates that button is connected |
30 | to dedicated (not shared) interrupt which can be disabled to | |
31 | suppress events from the button. | |
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32 | |
33 | Example nodes: | |
34 | ||
7d8d8625 | 35 | gpio-keys { |
fd05d089 | 36 | compatible = "gpio-keys"; |
fd05d089 | 37 | autorepeat; |
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38 | |
39 | up { | |
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40 | label = "GPIO Key UP"; |
41 | linux,code = <103>; | |
42 | gpios = <&gpio1 0 1>; | |
43 | }; | |
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44 | |
45 | down { | |
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46 | label = "GPIO Key DOWN"; |
47 | linux,code = <108>; | |
48 | interrupts = <1 IRQ_TYPE_LEVEL_HIGH 7>; | |
49 | }; | |
fd05d089 | 50 | ... |