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UART DMA issues

Question asked by David Hassett on Apr 18, 2018
Latest reply on May 8, 2018 by gusarambula

Using Linux 4.9 I have the following symptom with all Uarts on imx6q

Sending  data to serial port and reading back through a loopback will not

return characters unless this entry is made in the dts file

 

&uart3 {    status = "okay";    dma-names = "", "tx"; };
Why is  dma-names = "", "tx" necessary to make the serial port work? 

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