这里以Amlogic A113为例
arch/arm64/boot/dts/amlogic/xxx.dts
gpio key dts 配置 :
gpio_keypad{
compatible = "amlogic, gpio_keypad";
status = "disable";
scan_period = <20>;
key_num = <2>;
key_name = "mute","Alexa_wakeup";
key_code = <115 116>;
key_pin = <&gpio GPIOZ_10 GPIO_ACTIVE_LOW>,
<&gpio_ao GPIOAO_4 GPIO_ACTIVE_LOW>;
interrupts = <0 70 1
0 71 2>;
interrupt-names = "irq_keyup", "irq_keydown";
};
// key_name:按键名称
// key_num:按键数量
// key_code:按键上报值
// key_pin:gpio配置
//配置
arch/arm64/configs/meson64_smarthome_defconfig->CONFIG_AMLOGIC_GPIO_KEY=y
//gpio key驱动文件路径
drivers/amlogic/input/keyboard/adc_keypad.c
//按键定义
include/dt-bindings/input/linux-event-codes.h
驱动正常加载之后,进入文件系统,查看信息
# cat /proc/bus/input/devices
I: Bus=0010 Vendor=0001 Product=0001 Version=0100
N: Name="gpio_keypad"
P: Phys=gpio_keypad/input0
S: Sysfs=/devices/platform/gpio_keypad/input/input0
U: Uniq=
H: Handlers=kbd event0
B: PROP=0
B: EV=100003
B: KEY=1f80000 0 0 0
测试按键是否按下抬起1
//按下按键,会上报键值
cat /dev/input/event0