需要关闭imx6调试串口，用作普通的串口使用。

参考链接

http://blog.csdn.net/neiloid/article/details/7585876

http://www.cnblogs.com/helloworldtoyou/p/5437867.html

更改kernel中配置， make menuconfig

Symbol: SERIAL_IMX_CONSOLE [=y]

Type  : boolean

Prompt: Console on IMX serial port

    Defined at drivers/tty/serial/Kconfig:826

    Depends on: HAS_IOMEM [=y] && SERIAL_IMX [=y]

    Location:

      -> Device Drivers

        -> Character devices

          -> Serial drivers

            -> IMX serial port support (SERIAL_IMX [=y])

Tony Liu

2016-12-23, Shenzhen