Re: serial: 8250 fails to detect Exar XR16L2551 correctly

[Alex Williamson <alex.williamson@hp.com>]

On Mon, 2005-07-11 at 20:46 +0100, Russell King wrote:
> On Mon, Jul 11, 2005 at 01:00:08PM -0600, Alex Williamson wrote:
> > On Thu, 2005-07-07 at 14:20 +0100, David Vrabel wrote:
> > 
> > > I've redid the patch and added a check for this.  Alex, could you test
> > > this version, please.
> > 
> >    This detects the A2 ST16C255x as an XR16550, so apparently the sleep
> > check doesn't work.  I contacted Exar about these two seemingly
> > identical UARTs, and they say that the A2 ST16C255x should be compatible
> > with the XR16550 so perhaps we don't need to special case the A2 UART at
> > all.  Unfortunately, when I use the UART for a console, I get garbled
> > output from the time the UART is detected until we hit userspace.
> 
> There was a bug in this area - does it happen with latest and greatest
> kernels?

   Yes, I'm using a git pull from ~5hrs ago.  How recent was the bug
fix?  It worked fine before I applied David's patch, the A2 UART was
detected as a 16550A.  Thanks,

	Alex

-- 
Alex Williamson                             HP Linux & Open Source Lab