From: Johan Hovold <johan@kernel.org>
To: Loic Poulain <loic.poulain@linaro.org>
Cc: Johan Hovold <johan@kernel.org>, USB <linux-usb@vger.kernel.org>,
Andy Shevchenko <andy.shevchenko@gmail.com>,
Ajay Gupta <ajaykuee@gmail.com>,
Daniel Thompson <daniel.thompson@linaro.org>
Subject: [v3] USB: serial: ftdi_sio: Add support for CBUS GPIO
Date: Mon, 20 Aug 2018 17:23:10 +0200 [thread overview]
Message-ID: <20180820152310.GE14967@localhost> (raw)
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@linaro.org> 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@agner.ch
> >
> > Signed-off-by: Loic Poulain <loic.poulain@linaro.org>
>
> 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
next reply other threads:[~2018-08-20 15:23 UTC|newest]
Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top
2018-08-20 15:23 Johan Hovold [this message]
-- strict thread matches above, loose matches on Subject: below --
2018-09-05 8:25 [v3] USB: serial: ftdi_sio: Add support for CBUS GPIO Johan Hovold
2018-09-05 6:44 Loic Poulain
2018-09-04 12:47 Johan Hovold
2018-08-20 15:19 Loic Poulain
2018-08-04 10:17 Loic Poulain
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