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Date: Wed, 04 Apr 2007 12:58:03 -0700 (PDT)
From: David Miller <davem@...emloft.net>
To: rmk+lkml@....linux.org.uk
Cc: dwmw2@...radead.org, paulus@...ba.org, alan@...rguk.ukuu.org.uk,
flar@...andria.com, linuxppc-dev@...abs.org,
linux-kernel@...r.kernel.org
Subject: Re: [PATCH] Stop pmac_zilog from abusing 8250's device numbers.
From: Russell King <rmk+lkml@....linux.org.uk>
Date: Wed, 4 Apr 2007 10:00:16 +0100
> On Wed, Apr 04, 2007 at 01:43:30AM -0700, David Miller wrote:
> > Well the "bad hack" we use on sparc gives usable serial ports,
> > properly ordered and using /dev/ttyS0, with a proper matching
> > console selection.
>
> Well yes, but it seems to have code in the architecture's early
> command line parsing to parse the "console=" argument to set this
> magical "serial_console" variable.
>
> Is this an approach you recommend for all architectures?
The platform should use whatever is appropriate, and matches
firmware/bios/whatever conventions, to determine this stuff.
On Sparc you get an openfirmware environment variable called
"output-device" that can point to a framebuffer or serial
console device.
The user can override this on the kernel command line, of course, and
what they ask for will get translated properly.
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