Re: [PATCHv4 2/3] tty/serial: at91: fix hardware handshake with GPIOs

From: Richard Genoud
Date: Fri Sep 30 2016 - 07:46:21 EST

2016-09-30 13:16 GMT+02:00 Alexandre Belloni
> On 30/09/2016 at 13:04:28 +0200, Richard Genoud wrote :
>> Anyway, the problematics setups are all the setups with USMODE_HWHS
>> enabled on platform without Fifos or PDC,
>> i.e. all platforms but sama5d2 (Cyrille, correct me if I'm wrong).
> This is a wrong assumption, at91rm9200 to at91sam9g45 all have a pdc.
> Please, don't break those platforms.
> The only affected platforms are sam9x5, sama5d3 and sama5d4.
Have you tested them ?

And why are you saying that rm9200 and g45 will be broken with this patch ?
If they have a pdc, they will fall in the case:
(atmel_use_pdc_rx(port) || atmel_use_fifo(port))
and thus use:

won't they ?