Re: [PATCH] USB: ftdi_sio: add GPIO support

[Philipp Hachtmann]

Hi,

> Would this patch interfere with adding support for using the CBUS pins
> as GPIOs while operating in normal UART mode?

Most interesting question!

> > Care was taken to prevent using GPIOs if the serial device is in use
> > and vice versa.

What about CBUS GPIO support?

> Ok, so we're not extending the serial driver with support for
> controlling some unused pins (e.g. CBUS) but rather implementing support
> for a mutually exclusive mode.
For bitbang mode (on the data lines) - yes. But for bitbang on CBUS - no.


I have sent a proposal a few weeks ago but Greg did not like special 
sysfs stuff :-P
He asked me to use the GPIO subsystem for the CBUS pins. I am out of 
time until july. But I still want and need CBUS support in parallel with 
serial/FIFO operation.


Regards

Philipp
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