Re: [PATCH 6.1.y-cip 00/85] soc: renesas: Add RZ/G3E support

Tommaso Merciai
2025-03-13T11:53:30Z

Hi Pavel,

Thanks for your comments.

On Thu, Mar 13, 2025 at 11:51:29AM +0100, Pavel Machek wrote:
> Hi!
>
> > This series add support for RZ/G3E SoC to linux-6.1.y-cip kernel.
> > All patches are cherry-picked from mainline kernel.
>
> 85 patches, 3000+ lines of code. So we deserve so back story here:

You are completely right.
Let me share with you some details:

>
> What is RZ/G3E? Is it new generation of something? Is it used
> somewhere?

The RZ/G3E device is a general-purpose microprocessor with a quad-core CA-55,
single core CM-33, Ethos-U55 NPU, Mali-G52 3-D Graphics and other peripherals.

Here the first introduction to the kernel: [1]

>
> Why is it important? Why is it important for -cip?
>
> Does this add complete support? Or just enough to boot?

At the moment mainline supports only boot. So same backported here.
Going foward will add complete support.

>
> Is it in 6.12? If not, what will we do with 6.12-cip?

We have a plan to port to 6.12, once cip releases 6.12 kernel.

>
> Do you have it in lab running tests somewhere? When was it released?
> What was first mainline kernel to work there?

We have one on the lavalab, but is not up as mainline doesn't have ethernet support.
Eventually RZ/G3E board will be added in lava lab for testing once ethernet support added to mainline.

Does it answers all your questions?

>
> I'm curious, and, dunno, 50 lines of explanation what this is would
> not be out of place for 3000 lines of patches.
>
> Best regards,
> Pavel
>
> --
> DENX Software Engineering GmbH, Managing Director: Erika Unter
> HRB 165235 Munich, Office: Kirchenstr.5, D-82194 Groebenzell, Germany

[1] https://patchwork.kernel.org/project/linux-clk/cover/20241122124558.149827-1-biju.das.jz@bp.renesas.com/

Thanks & Regards,
Tommaso