imx-uart 21e8000.serial: Rx FIFO overrun

[lujfsd]

Hi，

   I am using i.MX6ul  core processor，use uart2 in 230400Baud,sometimes get error imx-uart 21e8000.serial: Rx FIFO overrun.

   following dmesg, I found this error msg followed Bus freq set to 24000000  msg。So i guess when the data transmission  in UART ,this time the Bus freq reduced,then RX FIFO overrun.Could someone help me to fixed.

[igorpadykov]

Hi jiefeng

to avoid uart overruns one can try flow control.

To disable the bus frequency driver use the following command:
echo 0 > /sys/bus/platform/drivers/imx6_busfreq/busfreq.13/enable
Also please check advices on  

https://community.nxp.com/thread/429536

Best regards
igor
-----------------------------------------------------------------------------------------------------------------------
Note: If this post answers your question, please click the Correct Answer button. Thank you!
-----------------------------------------------------------------------------------------------------------------------