linux-kernel - Re: [PATCH v3 4/6] arm: add early

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Message-ID: <CAL_JsqK-UppOnncr19dPEX8d8m0dvnONo_bzaXYX78rc2LfjwQ@mail.gmail.com>
Date:	Fri, 10 Jan 2014 14:04:57 -0600
From:	Rob Herring <robherring2@...il.com>
To:	Catalin Marinas <catalin.marinas@....com>
Cc:	"msalter@...hat.com" <msalter@...hat.com>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	Russell King <linux@....linux.org.uk>,
	Arnd Bergmann <arnd@...db.de>,
	Will Deacon <Will.Deacon@....com>,
	"linux-arm-kernel@...ts.infradead.org" 
	<linux-arm-kernel@...ts.infradead.org>
Subject: Re: [PATCH v3 4/6] arm: add early_ioremap support

On Fri, Jan 10, 2014 at 10:58 AM, Catalin Marinas
<catalin.marinas@....com> wrote:
> On Fri, Jan 10, 2014 at 04:11:03PM +0000, Rob Herring wrote:
>> On Thu, Jan 9, 2014 at 9:50 PM, Mark Salter <msalter@...hat.com> wrote:
>> > This patch uses the generic early_ioremap code to implement
>> > early_ioremap for ARM. The ARM-specific bits come mostly from
>> > an earlier patch from Leif Lindholm <leif.lindholm@...aro.org>
>> > here:
>> >
>> >   https://lkml.org/lkml/2013/10/3/279
>>
>> I think this will be useful to implement an arm64 style earlycon for
>> arm as the current DEBUG_LL doesn't really work with multi-platform
>> kernels. I started on this and quickly realized I needed the fixmap
>> support.
>
> It would be even better if you can make it more generic
> (drivers/tty/serial/) and keep DEBUG_LL as a specialised case for
> arch/arm (when !multi-platform).

Y
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