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Message-ID: <48F76A8B.6050306@kernel.org>
Date: Thu, 16 Oct 2008 09:23:39 -0700
From: Yinghai Lu <yinghai@...nel.org>
To: Paul Bolle <pebolle@...cali.nl>
CC: n0ano@...no.com, donald.d.dugger@...el.com,
linux-kernel@...r.kernel.org, Alan Cox <alan@...rguk.ukuu.org.uk>
Subject: Re: [PATCH] Enable console on PCI serial devices
Paul Bolle wrote:
> On Wed, 2008-10-15 at 14:48 -0600, n0ano@...no.com wrote:
>> On Wed, Oct 15, 2008 at 11:13:19AM +0200, Paul Bolle wrote:
>> As an aside, I would personally be in favor of removing the `earlycon'
>> kernel parameter entirely, it seems to be a strict subset of the
>> `console' parameter and anyone that wants `earlycon' probably wants
>> `console' anyway. Is there a strong argument for keeping that
>> parameter that I'm missing?
>
> The same thing puzzles me too. Note that earlyprintk=serial|ttyS?[...]
> also provides a similar feature.
>
>> earlycon= [KNL] Output early console device and options.
>> - uart[8250],io,<addr>[,options]
>> - uart[8250],mmio,<addr>[,options]
>> + uart[8250],io,<addr>[,options,[clkd]]
>> + uart[8250],mmio,<addr>[,options,[clkd]]
>
> clkd?
earlycon= and conole= share uart[8250]...
the difference console= will start from early console and switch normal console automatically if the ttyS come out with same io/mmio address etc.
YH
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