硬件
king3288
两个led：RED、BLUE
使用LED1进行解析：32*4 + 8*3 + 3=155 0:低电平有效
设备树
rpdzkj_config.dtsi
led_gpio{
compatible = "led_gpio";//匹配
status = "okay";//使能
led_gpio =<&gpio4 GPIO_D3 0>;//管脚 有效电平
};驱动
kernel/drivers/rongpin/led-gpio.c
参考我的另一篇博文定时器：https://blog.csdn.net/qq_34738528/article/details/105239915
/*
* GPIO driver for RICOH583 power management chip.
*
* Copyright (c) 2012, NVIDIA CORPORATION. All rights reserved.
* Author: Laxman dewangan <[email protected]>
*
* Based on c