二、配置内核
1、内核配置,勾选相应的驱动
make menuconfig
Device Drivers --->
Character devices --->
Serial drivers --->
--- Serial device bus
Serial device TTY port controller
<*> Serial device bus --->
<*> Cadence (Xilinx Zynq) UART support
Cadence UART console support
2、配置设备树