linux驱动之led(合众恒跃RK3506平台)

内核配置加上如下配置

CONFIG_NEW_LEDS=y
CONFIG_LEDS_CLASS=y
CONFIG_LEDS_GPIO=y
CONFIG_LEDS_TRIGGERS=y
CONFIG_LEDS_TRIGGER_TIMER=y
CONFIG_LEDS_TRIGGER_HEARTBEAT=y
CONFIG_LEDS_TRIGGER_CPU=y
CONFIG_LEDS_TRIGGER_DEFAULT_ON=y

设备树节点

leds: leds {       compatible = "gpio-leds";      work_led: work {          gpios = <&gpio1 RK_PA4 GPIO_ACTIVE_HIGH>;           linux,default-trigger = "heartbeat";           status = "okay";       };    
};