linux-kernel - Re: [GIT PULL] retire legacy WR sbc8548 and sbc8641 platforms

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Message-ID: <87pmu09rg1.fsf@mpe.ellerman.id.au>
Date:   Fri, 27 Aug 2021 01:05:50 +1000
From:   Michael Ellerman <mpe@...erman.id.au>
To:     Paul Gortmaker <paul.gortmaker@...driver.com>
Cc:     Benjamin Herrenschmidt <benh@...nel.crashing.org>,
        Paul Mackerras <paulus@...ba.org>,
        Scott Wood <oss@...error.net>, linuxppc-dev@...ts.ozlabs.org,
        linux-kernel@...r.kernel.org
Subject: Re: [GIT PULL] retire legacy WR sbc8548 and sbc8641 platforms

Paul Gortmaker <paul.gortmaker@...driver.com> writes:
> This is unchanged from the original wr_sbc-delete branch sent in January,
> other than to add the Acks from Scott in July, and update the baseline.
>
> Built with ppc64 defconfig and mpc85xx_cds_defconfig and mpc86xx_defconfig
> just to make sure I didn't fat finger anything in the baseline update.

Thanks for following up on this.

I ended up cherry-picking the patches into my branch. I like to keep my
next based on rc2, and merging this would have pulled in everything up
to rc7 into my branch.

I don't think you were planning to merge this branch anywhere else, so
it shouldn't make any difference, but let me know if it's a problem.

It should appear here soon:

  https://git.kernel.org/pub/scm/linux/kernel/git/powerpc/linux.git/log/?h=next


cheers
 

> Original v1 text follows below, from:
>
> https://lore.kernel.org/lkml/20210111082823.99562-1-paul.gortmaker@windriver.com
>
> It would be nice to get this in and off our collective to-do list.
>
> Thanks,
> Paul.
>
>   ---
>
> In v2.6.27 (2008, 917f0af9e5a9) the sbc8260 support was implicitly
> retired by not being carried forward through the ppc --> powerpc
> device tree transition.
>
> Then, in v3.6 (2012, b048b4e17cbb) we retired the support for the
> sbc8560 boards.
>
> Next, in v4.18 (2017, 3bc6cf5a86e5) we retired the support for the
> 2006 vintage sbc834x boards.
>
> The sbc8548 and sbc8641d boards were maybe 1-2 years newer than the
> sbc834x boards, but it is also 3+ years later, so it makes sense to
> now retire them as well - which is what is done here.
>
> These two remaining WR boards were based on the Freescale MPC8548-CDS
> and the MPC8641D-HPCN reference board implementations.  Having had the
> chance to use these and many other Fsl ref boards, I know this:  The
> Freescale reference boards were typically produced in limited quantity
> and primarily available to BSP developers and hardware designers, and
> not likely to have found a 2nd life with hobbyists and/or collectors.
>
> It was good to have that BSP code subjected to mainline review and
> hence also widely available back in the day. But given the above, we
> should probably also be giving serious consideration to retiring
> additional similar age/type reference board platforms as well.
>
> I've always felt it is important for us to be proactive in retiring
> old code, since it has a genuine non-zero carrying cost, as described
> in the 930d52c012b8 merge log.  But for the here and now, we just
> clean up the remaining BSP code that I had added for SBC platforms.
>
> --- 
>
> The following changes since commit e22ce8eb631bdc47a4a4ea7ecf4e4ba499db4f93:
>
>   Linux 5.14-rc7 (2021-08-22 14:24:56 -0700)
>
> are available in the Git repository at:
>
>   git://git.kernel.org/pub/scm/linux/kernel/git/paulg/linux.git wr_sbc-delete-v2
>
> for you to fetch changes up to d44e2dc12ea2112e74cdd25090eeda2727ed09cc:
>
>   MAINTAINERS: update for Paul Gortmaker (2021-08-24 08:19:01 -0400)
>
> ----------------------------------------------------------------
> Paul Gortmaker (3):
>       powerpc: retire sbc8548 board support
>       powerpc: retire sbc8641d board support
>       MAINTAINERS: update for Paul Gortmaker
>
>  MAINTAINERS                                 |   1 -
>  arch/powerpc/boot/Makefile                  |   1 -
>  arch/powerpc/boot/dts/fsl/sbc8641d.dts      | 176 -----------------
>  arch/powerpc/boot/dts/sbc8548-altflash.dts  | 111 -----------
>  arch/powerpc/boot/dts/sbc8548-post.dtsi     | 289 ----------------------------
>  arch/powerpc/boot/dts/sbc8548-pre.dtsi      |  48 -----
>  arch/powerpc/boot/dts/sbc8548.dts           | 106 ----------
>  arch/powerpc/boot/wrapper                   |   2 +-
>  arch/powerpc/configs/85xx/sbc8548_defconfig |  50 -----
>  arch/powerpc/configs/mpc85xx_base.config    |   1 -
>  arch/powerpc/configs/mpc86xx_base.config    |   1 -
>  arch/powerpc/configs/ppc6xx_defconfig       |   1 -
>  arch/powerpc/platforms/85xx/Kconfig         |   6 -
>  arch/powerpc/platforms/85xx/Makefile        |   1 -
>  arch/powerpc/platforms/85xx/sbc8548.c       | 134 -------------
>  arch/powerpc/platforms/86xx/Kconfig         |   8 +-
>  arch/powerpc/platforms/86xx/Makefile        |   1 -
>  arch/powerpc/platforms/86xx/sbc8641d.c      |  87 ---------
>  18 files changed, 2 insertions(+), 1022 deletions(-)
>  delete mode 100644 arch/powerpc/boot/dts/fsl/sbc8641d.dts
>  delete mode 100644 arch/powerpc/boot/dts/sbc8548-altflash.dts
>  delete mode 100644 arch/powerpc/boot/dts/sbc8548-post.dtsi
>  delete mode 100644 arch/powerpc/boot/dts/sbc8548-pre.dtsi
>  delete mode 100644 arch/powerpc/boot/dts/sbc8548.dts
>  delete mode 100644 arch/powerpc/configs/85xx/sbc8548_defconfig
>  delete mode 100644 arch/powerpc/platforms/85xx/sbc8548.c
>  delete mode 100644 arch/powerpc/platforms/86xx/sbc8641d.c