serial: imx: half-duplex RS485 operation with RTS active low

Mon Apr 16 11:02:56 PDT 2018

Hallo Stefan,

On Mon, Apr 16, 2018 at 06:12:41PM +0200, Stefan Agner wrote:
> On 16.04.2018 15:42, Uwe Kleine-König wrote:
> > Adding a respective check in the driver would be nice though.
> 
> Hm, yes agreed. Where would that check go? In probe? Then I guess it
> only would warn when using device tree properties...?

look at the code between the calls to uart_get_rs485_mode() and
imx_uart_rs485_config(). Something like that would be needed and
imx_uart_rs485_config must adapt the flags accordingly.

Best regards
Uwe

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Pengutronix e.K.                           | Uwe Kleine-König            |
Industrial Linux Solutions                 | http://www.pengutronix.de/  |