Hi Fabio, On Mon, Feb 20, 2017 at 10:42:56AM -0300, Fabio Estevam wrote: > Hi Clemens, > > On Mon, Feb 20, 2017 at 10:07 AM, Clemens Gruber > <clemens.gruber@xxxxxxxxxxxx> wrote: > the > > Then, setting SER_RS485_RTS_ON_SEND and clearing > > SER_RS485_RTS_AFTER_SEND would lead to: > > CTS_B being logic low during send > > CTS_B being logic high before and after send > > > > So, if you want CTS_B to be driven high during send, you'd have to clear > > SER_RS485_RTS_ON_SEND and set SER_RS485_RTS_AFTER_SEND. > > In this case we break userspace applications that follow the API as > described in Documentation/serial/serial-rs485.txt: > > /* Set logical level for RTS pin equal to 1 when sending: */ > rs485conf.flags |= SER_RS485_RTS_ON_SEND; I am sorry, I just noticed that I did not have the 1st patch of your series "[PATCH 1/2] serial: imx: Fix the RTS GPIO polarity" in my tree. So, looks good with **both** patches applied! ;) In my case, I'll set SER_RS485_RTS_AFTER_SEND and clear SER_RS485_RTS_ON_SEND to get logic low on the CTS_B pin during transmit. Thanks, Clemens -- 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
