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-rw-r--r--Documentation/devicetree/bindings/input/gpio-keys.txt12
1 files changed, 12 insertions, 0 deletions
diff --git a/Documentation/devicetree/bindings/input/gpio-keys.txt b/Documentation/devicetree/bindings/input/gpio-keys.txt
index 5c2c02140a62..44b705767aca 100644
--- a/Documentation/devicetree/bindings/input/gpio-keys.txt
+++ b/Documentation/devicetree/bindings/input/gpio-keys.txt
@@ -11,15 +11,22 @@ Each button (key) is represented as a sub-node of "gpio-keys":
Subnode properties:
- gpios: OF device-tree gpio specification.
+ - interrupts: the interrupt line for that input.
- label: Descriptive name of the key.
- linux,code: Keycode to emit.
+Note that either "interrupts" or "gpios" properties can be omitted, but not
+both at the same time. Specifying both properties is allowed.
+
Optional subnode-properties:
- linux,input-type: Specify event type this button/key generates.
If not specified defaults to <1> == EV_KEY.
- debounce-interval: Debouncing interval time in milliseconds.
If not specified defaults to 5.
- gpio-key,wakeup: Boolean, button can wake-up the system.
+ - linux,can-disable: Boolean, indicates that button is connected
+ to dedicated (not shared) interrupt which can be disabled to
+ suppress events from the button.
Example nodes:
@@ -33,4 +40,9 @@ Example nodes:
linux,code = <103>;
gpios = <&gpio1 0 1>;
};
+ button@22 {
+ label = "GPIO Key DOWN";
+ linux,code = <108>;
+ interrupts = <1 IRQ_TYPE_LEVEL_HIGH 7>;
+ };
...