[PATCH v3 7/7] arm64: dts: r8a7795: Add CA53 L2 cache-controller node

[Geert Uytterhoeven]

Hi Dirk,

On Tue, Feb 16, 2016 at 7:44 AM, Dirk Behme <dirk.behme at de.bosch.com> wrote:
> On 15.02.2016 21:38, Geert Uytterhoeven wrote:
>> Add a device node for the Cortex-A53 L2 cache-controller.
>>
>> The L2 cache for the Cortex-A53 CPU cores is 512 KiB large (organized as
>> 32 KiB x 16 ways).
>>
>> Signed-off-by: Geert Uytterhoeven <geert+renesas at glider.be>
>> ---
>> v3:
>>    - Remaining part of "[PATCH v2 6/6] arm64: renesas: r8a7795: Add L2
>>      cache-controller nodes".
>> ---
>>   arch/arm64/boot/dts/renesas/r8a7795.dtsi | 6 ++++++
>>   1 file changed, 6 insertions(+)
>>
>> diff --git a/arch/arm64/boot/dts/renesas/r8a7795.dtsi
>> b/arch/arm64/boot/dts/renesas/r8a7795.dtsi
>> index c07f4e83b988ba42..c572527afec3403a 100644
>> --- a/arch/arm64/boot/dts/renesas/r8a7795.dtsi
>> +++ b/arch/arm64/boot/dts/renesas/r8a7795.dtsi
>> @@ -72,6 +72,12 @@
>>                 cache-level = <2>;
>>         };
>>
>> +       L2_CA53: cache-controller at 1 {
>> +               compatible = "cache";
>> +               cache-unified;
>> +               cache-level = <2>;
>> +       };
>> +
>
> As we don't have any CA53 in the device tree yet, and it was rejected to add
> it, I'd think that we don't want these unused entries at the moment.

This is a preparatory step for adding the SYSC PM Domains.

> I'd propose to add the CA53 entries, first. And then add their L2 cache
> entries.
>
> Based on the outcome of the discussion for the CA57 we have to see if we
> want to add the unused cache-unified and cache-level, then, too.

These are specified by ePAPR, as I said before.
Remember, DT describes the hardware, not what Linux (or any other OS) is
using.

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