1Device-Tree bindings for GPIO attached mice 2 3This simply uses standard GPIO handles to define a simple mouse connected 4to 5-7 GPIO lines. 5 6Required properties: 7 - compatible: must be "gpio-mouse" 8 - scan-interval-ms: The scanning interval in milliseconds 9 - up-gpios: GPIO line phandle to the line indicating "up" 10 - down-gpios: GPIO line phandle to the line indicating "down" 11 - left-gpios: GPIO line phandle to the line indicating "left" 12 - right-gpios: GPIO line phandle to the line indicating "right" 13 14Optional properties: 15 - button-left-gpios: GPIO line handle to the left mouse button 16 - button-middle-gpios: GPIO line handle to the middle mouse button 17 - button-right-gpios: GPIO line handle to the right mouse button 18Example: 19 20#include <dt-bindings/gpio/gpio.h> 21 22gpio-mouse { 23 compatible = "gpio-mouse"; 24 scan-interval-ms = <50>; 25 up-gpios = <&gpio0 0 GPIO_ACTIVE_LOW>; 26 down-gpios = <&gpio0 1 GPIO_ACTIVE_LOW>; 27 left-gpios = <&gpio0 2 GPIO_ACTIVE_LOW>; 28 right-gpios = <&gpio0 3 GPIO_ACTIVE_LOW>; 29 button-left-gpios = <&gpio0 4 GPIO_ACTIVE_LOW>; 30 button-middle-gpios = <&gpio0 5 GPIO_ACTIVE_LOW>; 31 button-right-gpios = <&gpio0 6 GPIO_ACTIVE_LOW>; 32}; 33