From: Jerry Van Baren <gerald.vanbaren@smiths-aerospace•com>
To: Alex Zeffertt <ajz@cambridgebroadband•com>
Cc: linuxppc-embedded@ozlabs•org
Subject: Re: [U-Boot-Users] Where do you find *.dtb files?
Date: Thu, 03 May 2007 10:05:30 -0400 [thread overview]
Message-ID: <4639EC2A.8080502@smiths-aerospace.com> (raw)
In-Reply-To: <4639E9BF.40902@cambridgebroadband.com>
Alex Zeffertt wrote:
> Jerry Van Baren wrote:
>> Alex Zeffertt wrote:
>>> Hi all,
>>>
>>> I'm trying to boot linux-2.6.21-rc5 on my mpc832xemds board which is
>>> running
>>> u-boot 1.2.0.
>>>
>>> According to u-boot I need a device tree blob:
>>>
>>> => help bootm
>>> bootm [addr [arg ...]]
>>> - boot application image stored in memory
>>> passing arguments 'arg ...'; when booting a Linux kernel,
>>> 'arg' can be the address of an initrd image
>>> When booting a Linux kernel which requires a flat
>>> device-tree
>>> a third argument is required which is the address of the
>>> of the
>>> device-tree blob. To boot that kernel without an initrd
>>> image,
>>> use a '-' for the second argument. If you do not pass a
>>> third
>>> a bd_info struct will be passed instead
>>>
>>>
>>> Can anybody tell me where I can find one for this board?
>>>
>>> TIA,
>>>
>>> Alex
>>
>> Kernel tree under arch/powerpc/boot/dts?
>> <http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git;a=tree;f=arch/powerpc/boot/dts;h=2591d25045401b8beea474a1b4e117527e478521;hb=HEAD>
>>
>>
>> Best regards,
>> gvb
>
> Thanks Jerry. I've found
>
> powerpc/arch/powerpc/boot/dts/mpc832x_mds.dts
>
> ... but when I try to compile it I get an error:
>
> $ /opt/freescale/ltib/usr/bin/dtc -I dts -O dtb
> powerpc/arch/powerpc/boot/dts/mpc832x_mds.dts
> DTC: dts->dtb on file "powerpc/arch/powerpc/boot/dts/mpc832x_mds.dts"
> syntax error at line 14
> FATAL ERROR: Couldn't read input tree
>
> Perhaps my dtc is out of date - it came with the BSP from freescale
> which uses
> the 2.6.11 kernel.
>
> Do you know where I can find an up to date dtc? Is there any
> documentation regarding its use?
>
> Regards,
> Alex
Hi Alex,
Yes, you need to update your dtc. The latest dtc can be gotten from:
http://jdl.com/git_repos/
My makefile looks like this (WARNING: it is whitespace damaged, you must
replace the eight spaces in the rules with tabs):
8<--------------------------------------------------------------------
#
# Make device tree blobs
#
src = $(wildcard *.dts)
out = $(src:.dts=.dtb)
asm = $(src:.dts=.dtb)
QUIET = #-q
RESERVE = -R 4
SIZE = -S 0x3000
all: $(out)
%.dtb : %.dts
dtc $(QUIET) $(RESERVE) $(SIZE) -b 0 -O dtb -f -o $@ $^
%.asm : %.dts
dtc $(QUIET) $(RESERVE) $(SIZE) -b 0 -O asm -f -o $@ $^
8<--------------------------------------------------------------------
Best regards,
gvb
next prev parent reply other threads:[~2007-05-03 14:35 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <4639B9ED.7030902@cambridgebroadband.com>
[not found] ` <4639E6A9.2040708@smiths-aerospace.com>
2007-05-03 13:55 ` [U-Boot-Users] Where do you find *.dtb files? Alex Zeffertt
2007-05-03 14:05 ` Jerry Van Baren [this message]
2007-05-03 16:24 ` Jon Loeliger
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