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From: David Brown <davidb-sgV2jX0FEOL9JmXXK+q4OQ@public.gmane.org>
Subject: Re: [PATCH 1/2] arm/mx5: parse iomuxc pad configuratoin from device
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Date: Fri, 5 Aug 2011 00:07:29 -0700
Message-ID: <20110805070729.GA26563@huya.qualcomm.com>
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To: Matt Sealey <matt-sEEEE4iEDtaXzmuOJsdVMQ@public.gmane.org>
Cc: devicetree-discuss-uLR06cmDAlY/bJ5BZ2RsiQ@public.gmane.org, Sascha Hauer <s.hauer-bIcnvbaLZ9MEGnE8C9+IrQ@public.gmane.org>, linux-arm-kernel-IAPFreCvJWM7uuMidbF8XUB+6BGkLq7r@public.gmane.org, patches-QSEj5FYQhm4dnm+yROfE0A@public.gmane.org
List-Id: devicetree@vger.kernel.org

On Thu, Aug 04, 2011 at 06:07:15PM -0500, Matt Sealey wrote:
> Hi Grant, Shawn,
> =

> On Mon, Jul 25, 2011 at 3:46 PM, Grant Likely <grant.likely-s3s/WqlpOiPyB63q8FvJNQ@public.gmane.org>=
 wrote:
> > This could get really verbose in a really big hurry. =A0Fortunately the
> > dtb format is sophisticated enough to only store each unique property
> > name once, so the data shouldn't be huge, but it is still going to
> > make for huge source files. =A0Can you think of a more concise
> > representation?
> =

> Yes: no representation at all. The correct place for IOMUX setup being
> done is *inside the boot firmware as soon as physically possible* and
> not seconds into boot after U-Boot has made a console, done a boot
> timeout, loaded scripts, kernels and ramdisks from media and then
> uncompressed and entered a Linux kernel.

This is true in situations where we have control over the bootloader,
but that isn't always the case.

David

-- =

Sent by an employee of the Qualcomm Innovation Center, Inc.
The Qualcomm Innovation Center, Inc. is a member of the Code Aurora Forum.