linux-kernel - Re: [PATCH] efikamx: reintroduce Genesi Efika MX Smarttop via device tree

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Date:	Wed, 8 Aug 2012 14:19:40 -0300
From:	Fabio Estevam <festevam@...il.com>
To:	Matt Sealey <matt@...esi-usa.com>
Cc:	Shawn Guo <shawn.guo@...aro.org>,
	Steev Klimaszewski <steev@...esi-usa.com>,
	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
	Linux ARM Kernel Mailing List 
	<linux-arm-kernel@...ts.infradead.org>
Subject: Re: [PATCH] efikamx: reintroduce Genesi Efika MX Smarttop via device tree

Matt,

On Wed, Aug 8, 2012 at 1:55 PM, Matt Sealey <matt@...esi-usa.com> wrote:

...
> or any setup at all for this. What's stopping this right now is you
> need a new U-Boot which we
> didn't release or mainline because we are still testing it (old U-Boot
> shipped on the boards
> cannot boot device tree anyway). While the number of users of this is

Actually you can boot a device tree kernel even on old bootloaders
that do not support dt.

You need to select:
CONFIG_ARM_APPENDED_DTB=y
CONFIG_ARM_ATAG_DTB_COMPAT=y

Then,

make -j4 zImage
make imx51-babbage.dtb
cat arch/arm/boot/zImage arch/arm/boot/ imx51-babbage.dtb  >
arch/arm/boot/zImage_dtb
mkimage -A arm -O linux -T kernel -C none -a 0x90008000 -e 0x90008000
-n Linux -d arch/arm/boot/zImage_dtb arch/arm/boot/uImage

and boot this generated uImage the same way as you used to do in the
non-dt case.

Regards,

Fabio Estevam
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