[PATCH v3 4/6] arm: add early_ioremap support

[Rob Herring]

On Fri, Jan 10, 2014 at 10:58 AM, Catalin Marinas
<catalin.marinas at arm.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 at redhat.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 at linaro.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).

Yes, probably can do that. Perhaps DEBUG_LL can go back to just really
early debug as Russell desires.

Rob