IMX6Q UART work with RS485 function

[lifusong]

Dear sir.

    we board have four uart work with RS485 (UART1 UART2 UART3 UART5)  kernel 3.14.52

we modify the file : driver/tty/serial/imx.c 

the uart look seem work ok when only one uart work

but more than one rs485 uart work together, will can't read data when uart A is r/w data during B is r/w data.

how to fix.

Had Fix issue.

   the point is tx chang to rx, must wait tx send data complete.

[igorpadykov]

Hi li

one can check suggestions provided on

[imx6] RS485 could be supported on Imx6 series ?  

Best regards
igor
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[lifusong · Accepted solution]

Hi sir.

  thanks for your replay.

  we had fix this issue.

   the point is tx chang to rx, must wait tx send data complete.