Dear Sir or Madam,
Refer to "46.1 Introduction" in i.MX 6 Linux Reference Manual, Rev. L3.10.17_1.0.0-ga, 05/2014
If you want to use the DMA support for UART please also
enable the RTS/CTS for it. The DMA may be abnormal if you
do not enable the RTS/CTS.
I'd like to know the why FSL judged that RTS/CTS need.
(My customer will use SDMA with UART that do not enable the RTS/CTS.)
What problem did freescale face in the past?