From: Eric Nelson <eric.nelson@boundarydevices.com>
To: u-boot@lists.denx.de
Subject: [U-Boot] CONFIG_REVISION (was i.MX6: mx6qsabrelite: allow use with Freescale 2.6.38 kernels)
Date: Sun, 04 Mar 2012 12:45:17 -0700 [thread overview]
Message-ID: <4F53C64D.4040407@boundarydevices.com> (raw)
In-Reply-To: <4F534D67.3010709@denx.de>
On 03/04/2012 04:09 AM, Stefano Babic wrote:
> On 03/03/2012 14:30, Wolfgang Denk wrote:
>> Dear Dirk Behme,
>>
>> <snip>
>>
>> There are 3 commits in this series:
>>
>> [PATCH 1/3] i.MX6: mx6qsabrelite: add CONFIG_REVISION_TAG
>> [PATCH 2/3] i.MX6: mx6qsabrelite: add MACH_TYPE_MX6Q_SABRELITE
>> [PATCH 3/3] i.MX6: mx6qsabrelite: add ext2 support
>>
>> I dislike #1 because it uses the completely undocumented
>> CONFIG_REVISION_TAG, and I agree with Marek's and Stefano's comments.
>
> A lot of boards are currently set CONFIG_REVISION_TAG. Sure, it would be
> nice to document it. To be consistent we should drop this CONFIG_ from
> all boards, or add documentation for it.
>
> However, I am asking if this TAG is really needed. I have searched in
> 2.6.38 Kernel provided by Freescale if the TAG is really evaluated to
> set different revisions of the boards, but I have not found anything. Is
> it really needed ? If not, we should drop it.
>
The linkage is really indirect. The ATAG item is still supported in the
main-line kernel for ARM:
http://git.kernel.org/?p=linux/kernel/git/torvalds/linux.git;a=blob;f=arch/arm/kernel/setup.c;h=a255c39612ca3cfa10bddb7c7728216efeeb04d5;hb=HEAD#l704
The breakage I noticed was in the VPU driver, which refused to load
with a zero-value in system_rev. The net result was no video playback
in the Freescale Android ICS release.
next prev parent reply other threads:[~2012-03-04 19:45 UTC|newest]
Thread overview: 35+ messages / expand[flat|nested] mbox.gz Atom feed top
2012-03-02 22:55 [U-Boot] i.MX6: mx6qsabrelite: allow use with Freescale 2.6.38 kernels Eric Nelson
2012-03-02 22:55 ` [U-Boot] [PATCH 1/3] i.MX6: mx6qsabrelite: add CONFIG_REVISION_TAG Eric Nelson
2012-03-02 22:59 ` Marek Vasut
2012-03-04 20:35 ` Eric Nelson
2012-03-04 20:59 ` Marek Vasut
2012-03-04 21:04 ` Eric Nelson
2012-03-04 21:18 ` Marek Vasut
2012-03-04 22:06 ` Wolfgang Denk
2012-03-04 22:41 ` Eric Nelson
2012-03-03 10:26 ` Stefano Babic
2012-03-02 22:55 ` [U-Boot] [PATCH 2/3] i.MX6: mx6qsabrelite: add MACH_TYPE_MX6Q_SABRELITE Eric Nelson
2012-03-02 23:00 ` Marek Vasut
2012-03-03 10:28 ` Stefano Babic
2012-03-02 22:55 ` [U-Boot] [PATCH 3/3] i.MX6: mx6qsabrelite: add ext2 support Eric Nelson
2012-03-07 9:36 ` Stefano Babic
2012-03-02 23:01 ` [U-Boot] i.MX6: mx6qsabrelite: allow use with Freescale 2.6.38 kernels Marek Vasut
2012-03-02 23:25 ` Wolfgang Denk
2012-03-02 23:46 ` Eric Nelson
2012-03-02 23:50 ` Fabio Estevam
2012-03-03 9:33 ` Wolfgang Denk
2012-03-03 6:35 ` Dirk Behme
2012-03-03 9:38 ` Wolfgang Denk
2012-03-03 10:43 ` mailander
2012-03-03 11:32 ` Dirk Behme
2012-03-03 13:30 ` Wolfgang Denk
2012-03-04 1:19 ` Troy Kisky
2012-03-04 8:39 ` Wolfgang Denk
2012-03-07 9:37 ` Albert ARIBAUD
2012-03-04 11:09 ` Stefano Babic
2012-03-04 14:14 ` Igor Grinberg
2012-03-04 19:45 ` Eric Nelson [this message]
2012-03-07 8:43 ` [U-Boot] CONFIG_REVISION (was i.MX6: mx6qsabrelite: allow use with Freescale 2.6.38 kernels) Stefano Babic
2012-03-07 15:53 ` Eric Nelson
2012-03-07 16:32 ` Stefano Babic
2012-03-03 10:33 ` [U-Boot] i.MX6: mx6qsabrelite: allow use with Freescale 2.6.38 kernels Stefano Babic
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