[PATCH v2 0/6] ARM/arm64 : shmobile/renesas: Add L2 cache-controller nodes

[Geert Uytterhoeven]

Hi Simon,

On Mon, Feb 15, 2016 at 2:58 AM, Simon Horman <horms at verge.net.au> wrote:
> On Mon, Dec 07, 2015 at 07:24:13PM +0100, Geert Uytterhoeven wrote:
>> This patch series adds the missing L2 cache-controller nodes to the
>> DTSes for various Renesas ARM-based SoCs, and links the CPU nodes to
>> them.
>>
>> For R-Mobile APE6 (r8a73a4), the L2 cache-controllers are also linked to
>> the respective (already existing) SYSC Power Domains. Fortunately these
>> Power Domains were never powered down, as they are parents of the Power
>> Domains containing CPU cores. This may change in the future.
>>
>> For R-Car Gen2 and Gen3 (r8a779x), this serves as a preparatory step for
>> adding SYSC Power Domain support later.
>>
>> Question for the ARM/DT people: What are the DT bindings for
>> Cortex-A15/A7/A57/A53 L2 cache controllers?
>> Everybody just seems to use "cache" for the compatible values...
>>
>> Patches 2-5 were extracted from series "[PATCH/RFC 00/15]
>> ARM: shmobile: R-Car: Add SYSC PM Domain DT Support",
>> (http://lists.infradead.org/pipermail/linux-arm-kernel/2015-June/348742.html)
>> and received some fixes. You can find more detailed changelogs in the
>> individual patches).
>>
>> This has been tested on r8a73a4/ape6evm, r8a7791/koelsch, and
>> r8a7795/salvator-x.
>
> Sorry for loosing track of this until now.
>
> It seems to me that the Gen-2 changes could be applied, is that correct?

And APE6 :-)

> It also seems to me that there was inconclusive discussion regarding
> the r8a7795 change, is that also correct.

There was discussion (for all SoCs) about the presence of the arm,data-latency
and arm,tag-latency properties. Given the mess^H^H^H^H presence or
absence of virtualization they may or may not be valid...

I think the way forward (keeping the dependency for SYSC PM Domains in mind) is
to apply the series, after removing the controversial latency properties.

Should I resend, or can/will you handle that?

Thanks!

Gr{oetje,eeting}s,

                        Geert

--
Geert Uytterhoeven -- There's lots of Linux beyond ia32 -- geert at linux-m68k.org

In personal conversations with technical people, I call myself a hacker. But
when I'm talking to journalists I just say "programmer" or something like that.
                                -- Linus Torvalds