1、自带按键驱动程序源码简析

2、自带按键驱动程序的使用

设备节点信息：

gpio-keys {
    compatible = "gpio-keys";
    pinctrl-names = "default";
    pinctrl-0 = <&key_pins_a>;
    autorepeat;
    key0 {
    label = "GPIO Key L";
    linux,code = <KEY_L>;
    gpios = <&gpiog 3 GPIO_ACTIVE_LOW>;
    };
    key1 {
    label = "GPIO Key S";
    linux,code = <KEY_S>;
    gpios = <&gpioh 7 GPIO_ACTIVE_LOW>;
    };
    wkup {
    label = "GPIO Key Enter";
    linux,code = <KEY_ENTER>;
    gpios = <&gpioa 0 GPIO_ACTIVE_HIGH>;
    gpio-key,wakeup;
    };
};