Bjørn Mork wrote:
Balint Viragh <bviragh@xxxxxxxxxxx> writes:
The following patch introduces a new module parameter (gpio),
to initialize the GPIO control register of pl2303hx in pl2303_startup,
and a new ioctl to control it from user applications.
You should probably read the thread regarding GPIO support for cp210x
and use Alan Cox' proposed tty helper for controlling this:
https://lkml.org/lkml/2012/5/16/288
Bjørn
Thank you for suggesting that thread.
It seems to be a nice, generic way to control GPIO pins of various
USB-serial chips.
Once they agree in the exact interface of the tty helper, the pl2303 can
be modified to use that.
As far as I can see the exact function call to the underlying usb driver
is missing from the proposal.
Regards,
Balint
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