[PATCH 3/3] serial: pl011: allow very high baudrates

Alan Cox alan at lxorguk.ukuu.org.uk
Fri Sep 21 16:55:55 EDT 2012

On Fri, 21 Sep 2012 21:34:40 +0100
Russell King - ARM Linux <linux at arm.linux.org.uk> wrote:

> On Fri, Sep 21, 2012 at 08:56:03PM +0100, Alan Cox wrote:
> > If you are calling TCSETS2 passing BOTHER and an actual specific speed
> > you should always be getting handed back the speed requested as it'll see
> > the BOTHER flag is present and assume the caller is smart.
> Is this something that should be handled by glibc?  If so, ARM for
> whatever reason still seems to use the standard TCGETS and TCSETS
> calls... at least stracing stty in ubuntu precise suggests that's
> the case.

The design was agreed with the glibc people years ago. The glibc folks
then repeatedly ignored it and refused to add it. So I gave up on them.

If you are doing low level tty speed stuff, use ioctl directly.

Now that glibc has had a management change and a clue implant maybe it
can be fixed. Feel free to go kicking deal whales down beaches if you


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