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Venkata Narendra Kumar Gutta b0e5152a74 dt-bindings: Add devicetree bindings to devicetree project
Add devicetree bindings snapshot to the devicetree project.
This snapshot is taken as of the
'commit 5fba1b18cfc72e264e5f3ce49020ed322aa6ac9f ("Merge 5.6-rc3
into android-mainline")' of the kernel project.

Change-Id: Ia087ab2b7d4a2616ea446a69683a8b5b821d0448
2020-05-07 20:43:53 -07:00

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Device-Tree bindings for GPIO attached mice
This simply uses standard GPIO handles to define a simple mouse connected
to 5-7 GPIO lines.
Required properties:
- compatible: must be "gpio-mouse"
- scan-interval-ms: The scanning interval in milliseconds
- up-gpios: GPIO line phandle to the line indicating "up"
- down-gpios: GPIO line phandle to the line indicating "down"
- left-gpios: GPIO line phandle to the line indicating "left"
- right-gpios: GPIO line phandle to the line indicating "right"
Optional properties:
- button-left-gpios: GPIO line handle to the left mouse button
- button-middle-gpios: GPIO line handle to the middle mouse button
- button-right-gpios: GPIO line handle to the right mouse button
Example:
#include <dt-bindings/gpio/gpio.h>
gpio-mouse {
compatible = "gpio-mouse";
scan-interval-ms = <50>;
up-gpios = <&gpio0 0 GPIO_ACTIVE_LOW>;
down-gpios = <&gpio0 1 GPIO_ACTIVE_LOW>;
left-gpios = <&gpio0 2 GPIO_ACTIVE_LOW>;
right-gpios = <&gpio0 3 GPIO_ACTIVE_LOW>;
button-left-gpios = <&gpio0 4 GPIO_ACTIVE_LOW>;
button-middle-gpios = <&gpio0 5 GPIO_ACTIVE_LOW>;
button-right-gpios = <&gpio0 6 GPIO_ACTIVE_LOW>;
};