From mboxrd@z Thu Jan  1 00:00:00 1970
From: Tony Lindgren <tony@atomide.com>
Subject: Re: [PATCH 2/6] ARM: OMAP2+: Remove board-omap4panda.c
Date: Wed, 12 Jun 2013 09:31:24 -0700
Message-ID: <20130612163124.GD8164@atomide.com>
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To: Ming Lei <tom.leiming@gmail.com>
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* Ming Lei <tom.leiming@gmail.com> [130603 08:34]:
> Hi,
> 
> On Sat, May 18, 2013 at 3:17 AM, Tony Lindgren <tony@atomide.com> wrote:
> > We can now boot with device tree. If you don't want to update u-boot,
> > you can boot with appended DTB with the following instructions:
> >
> > 1. Make sure you have the appended DTB support in .config
> >
> >    CONFIG_ARM_APPENDED_DTB=y
> >    CONFIG_ARM_ATAG_DTB_COMPAT=y
> >    CONFIG_ARM_ATAG_DTB_COMPAT_CMDLINE_EXTEND=y
> >
> > 2. Build the zImage
> >
> >    $ ARCH=arm CROSS_COMPILE=... make zImage
> >
> > 3. Build the device tree blobs
> >
> >    $ ARCH=arm CROSS_COMPILE=... make dtbs
> >
> > 4. Append the correct panda dtb to zImage
> >
> >    Depending on your hardware it's omap4-panda.dtb, omap4-panda-a4.dtb
> >    or omap4-panda-es.dtb.
> >
> >    $ cat arch/arm/boot/zImage arch/arm/boot/dts/omap4-panda-es.dtb > /tmp/appended
> >
> > 5. Use mkimage to produce the appended device tree uImage
> >
> >    $ mkimage -A arm -O linux -T kernel -C none -a 0x80008000 -e 0x80008000 \
> >      -n "Linux" -d /tmp/appended /tmp/uImage
> 
> I followed the above steps and tried devicetree on Pandaboard against
> 3.10.0-rc3-next-20130528, and the board will hang during boot, but works
> well with legacy mode.
> 
>          Hardware: Pandaboard A1
>          dtb: omap4-panda.dtb
> 
> See 'dmesg' on below link:
> 
>          http://kernel.ubuntu.com/~ming/up/panda-dts.dmesg
> 

Hmm looks like it boots to init. Maybe add initcall_debug to the cmdline in
case there's some late_initcall that causes the issue. It's probably some
trivial issue causing it.

Regards,

Tony