Re: [PATCH v1] 8250: add support for DTR/DSR hardware flow control

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On Wed, 20 Aug 2008 17:43:36 -0400
Aristeu Rozanski <aris@xxxxxxxxx> wrote:

> > > About a RS485 ioctl: could you consider the attached files which are already
> > > in the Linux kernel (in include/asm-cris).
> > > They define a TIOCSERSETRS485 (ioctl.h), and the data structure (rs485.h)
> > > with allows to specify timings. Sounds just like what we want ?
> > 
> > I had a deeper look at this for RS485 and the answer is "sort of". I've
> > reworked the structure to keep it the same size irrespective of 32/64bit
> > systems, and to make stuff flags that can be, plus add some extra u32
> > words in case we need to (.. when we need to ;)) add stuff later.
> > 
> > Comments, thoughts - will this do what people in the RS485 world need ?
> as for DTR/DSR patch, will be used the same approach?

I'm still trying to get a sensible answer on how other Unixes handle it
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