Re: [PATCH v1 1/3] powerpc, 8xx: remove support for 8xx

Hello Christophe,

Am 14.06.2017 um 09:40 schrieb Christophe LEROY:

Le 13/06/2017 à 09:37, Heiko Schocher a écrit :

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Hello Christophe,

Am 13.06.2017 um 07:40 schrieb Christophe LEROY:

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Le 13/06/2017 à 07:26, Christophe LEROY a écrit :

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There was for long time no activity in the 8xx area.
We need to go further and convert to Kconfig, but it
turned out, nobody is interested anymore in 8xx,
so remove it (with a heavy heart, knowing that I remove
here the root of U-Boot).

Signed-off-by: Heiko Schocher <redacted>

Please don't do that.

Tom already applied the patch to mainline ...

Can be reverted ?

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As you can see in Linux kernel activity, there have been a lot activity related to the 8xx,
including but not limited to:
1/ HW Crypto for the 885 (Talitos SEC1)
2/ TX NAPI in the 8xx Ethernet driver
3/ Scatter/Gather support in the 8xx Ethernet driver
4/ Hugepages
5/ Perf events
6/ hw breakpoints
7/ Linear memory mapping via Large TLBs

Thats linux ... not u-boot!

Sure, but it shows there is still interest to that processor. The 885 is a good recent 8xx.
u-boot is not really something we focus on. We update it once a year, as far as it can start our
Linux box we are happy.

Hmm...

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The followings links give an overview of the activity:

https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux-stable.git/log/drivers/crypto/talitos.c
https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux-stable.git/log/drivers/net/ethernet/freescale/fs_enet/fs_enet-main.c


https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux-stable.git/log/arch/powerpc/kernel/head_8xx.S


https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux-stable.git/log/arch/powerpc/mm/8xx_mmu.c


We have thousands of boards with mpc885 running and requiring support for at least the next 10
years.

Ok, nice to hear!

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How can the 8xx survive without U-boot support ?

Tom asked (I think a lot of times) regarding converting mpc8xx to
Kconfig / DM and nobody did the necessary steps. We also asked
our customers if they can do the necessary changes, none was interested.

I did't know. Indeed I was not following uboot activity until someone who knows the level of
interest we have in 8xx alerted me yesterday.
It would have been nice if you had notified linuxppc-dev list.

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So, if you need mpc8xx support in U-Boot, simply add it again with
Kconfig and DM support included!

Ok, I'll try and come with a patch to convert 8xx in the coming weeks. In the mean time please
revert the deletion in order to avoid nightmare conflicts when the converting patch comes.

I vote for making a patch which adds new mpc8xx support, as we had a lot
of crap in the code, but thats Tom decision!

bye,
Heiko
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