[RK3399][Android7.1]编写一个安卓的GPIO驱动

1、在 kernel/drivers 目录下新建 ioctrl 文件夹 # cd kernel/drivers # mkdir ioctrl 在/driver/ioctrl 目录下，新建 ioctrl.c ，ioctrl.h , Kconfig, Makefile 等 4 个文件。 2、在 Kconfig 下添加代码： config IOCTRL tristate "io Control" default y help when system setup,change the io state 在 Makefile 下添加代码： obj-$(CONFIG_IOCTRL) += ioctrl.o 在 ioctrl.c 中添加代码： /* * Driver for pwm demo on Firefly board ioctrl. * * Copyright (C) 2022, Zhongshan T-chip Intelligent Technology Co.,ltd. * Copyright 2006 Sam Chan * * This program is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License version 2 as * published by the Free Software Foundation.