On Wed, Apr 18, 2018 at 08:20:57PM +0200, Wolfram Sang wrote: > Early revisions of certain SoCs cannot do multiple DMA RX streams in > parallel. To avoid data corruption, only allow one DMA RX channel and > fall back to PIO, if needed. > > Signed-off-by: Wolfram Sang <wsa+renesas@xxxxxxxxxxxxxxxxxxxx> > Reviewed-by: Yoshihiro Shimoda <yoshihiro.shimoda.uh@xxxxxxxxxxx> > Tested-by: Nguyen Viet Dung <dung.nguyen.aj@xxxxxxxxxxx> Reviewed-by: Simon Horman <horms+renesas@xxxxxxxxxxxx>