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Input: gpio_mouse - add DT bindings

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This adds DT bindings for simple mice attached to GPIO lines. As the
properties are very general and pertains to all mice I can think of, we use
very generic names for the 4-7 GPIO lines, "up", "down" etc.

Acked-by: Hans-Christian Noren Egtvedt <egtvedt@samfundet.no>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Acked-by: Rob Herring <robh@kernel.org>
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
This commit is contained in:
Linus Walleij 2017-10-19 16:21:05 -07:00 committed by Dmitry Torokhov
parent 34cf5a1cad
commit 055f624e1e
1 changed files with 32 additions and 0 deletions
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Documentation/devicetree/bindings/input/gpio-mouse.txt Normal file
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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>;
};