linux-kernel - Re: [PATCH] Enable console on PCI serial devices

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Date:	Thu, 16 Oct 2008 20:39:12 -0600
From:	n0ano@...no.com
To:	Bjorn Helgaas <bjorn.helgaas@...com>
Cc:	donald.d.dugger@...el.com, linux-kernel@...r.kernel.org
Subject: Re: [PATCH] Enable console on PCI serial devices

On Thu, Oct 16, 2008 at 05:16:47PM -0600, Bjorn Helgaas wrote:
>... 
> Did you play with "console=uart,io,0xe880,115200n8" at all?
> 
> That gives you early serial console output and automatically switches
> to the matching ttyS device when it is discovered.
> 
> "console=uart" doesn't have support for crystal frequency, but that
> could be added in drivers/serial/8250_early.c.
> 

Yep, that was pointed out and my latest patch does just that, use the
`uart' syntax to specify I/O address and enhance it to control crystal
frequency.

We're arguing now about what to do about the `earlycon' and `earlyprintk'
parameters, I contend we should remove those as the `console=uart' is
a superset of their capabilities but there are some dissenting opinions.

-- 
Don Dugger
"Censeo Toto nos in Kansa esse decisse." - D. Gale
n0ano@...no.com
Ph: 303/443-3786
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