Re: [PATCH v3] USB: serial: ftdi_sio: Add support for CBUS GPIO

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On Mon, Aug 20, 2018 at 05:19:40PM +0200, Loic Poulain wrote:
> Hi Johan,
> 
> On 4 August 2018 at 12:17, Loic Poulain <loic.poulain@xxxxxxxxxx> wrote:
> > Some FTDI devices like FTX or FT232R support CBUS Bit Bang mode on CBUS
> > pins, allowing host to control them via simple USB control transfers.
> > To make use of a CBUS pin in Bit Bang mode, the pin must be configured
> > to I/O mode in the FTDI EEPROM. This mode perfectly coexists with regular
> > USB to Serial function.
> >
> > In this implementation, a GPIO controller is registered on FTDI probe
> > if at least one CBUS pin is configured for I/O mode. For now, only
> > FTX devices are supported.
> >
> > This patch is based on previous Stefan Agner implementation tentative
> > on LKML [1].
> >
> > [1] Message-Id: 1434838377-8042-1-git-send-email-stefan@xxxxxxxx
> >
> > Signed-off-by: Loic Poulain <loic.poulain@xxxxxxxxxx>
> 
> Any comments on this v3?

I'm just back from vacation and haven't had time to look at this one yet
at all. Sorry.

Johan



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