On Fri, 2015-11-20 at 07:13AM -0500, Peter Hurley wrote: > > > On 11/19/2015 03:02 PM, Soren Brinkmann wrote: > > start_tx must start transmitting characters. Regardless of the state of > > the circular buffer, always enable the transmitter hardware. > > Why? > > Does cdns_uart_stop_tx() actually stop the transmitter so that > data remains in the transmitter? Fixing up the patch, I looked at this one. It might actually do that. Without having changed anything. The doc says: "The driver should stop transmitting characters as soon as possible.". And the implementation is really not draining any FIFO, but just disabling the transmitter. I take your question as that this might not be this way? Should stop_tx drain the FIFO first? Thanks, Sören -- To unsubscribe from this list: send the line "unsubscribe linux-serial" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
