On Thu, Feb 16, 2017 at 5:44 PM, Russell King - ARM Linux
<linux@xxxxxxxxxxxxxxx> wrote:
> On Thu, Feb 16, 2017 at 11:17:39AM -0500, Chris Brandt wrote:
>> The PL310 in the Renesas RZ/A1 SoC (R7S72100) does not have the sideband
>> signals connected between the CPU and L2C. According the PL310 TRM,
>> sideband signals are optional.
>>
>> If a PL310 is added to a system, but the sideband signals are not
>> connected, some Cortex A9 optimizations cannot be used. In particular,
>> enabling Full Line Zeros in the CA9 without sidebands connected will
>> crash the system since the CA9 will expect the L2C to perform operations,
>> yet the L2C never gets the commands.
>>
>> This series adds the option to not enable anything in the PL310 that
>> uses sidebands, and then adds L2C support to the RZ/A1 DT.
>>
>> v4:
>> * changed l2x0_bresp_dis to l2x0_bresp_disable
>> * changed l2x0_flz_dis to l2x0_flz_disable
>
> Looks good, thanks.
>
> I'll want to merge patch 1, but I suspect the other two patches need
> to go through arm-soc, which will cause a problem due to being merged
> independently... Arnd?
I just checked what we have queued up in next/dt for this platform,
and I'm fairly sure that there are no conflicts, so you can pick up all three
and add
Acked-by: Arnd Bergmann <arnd@xxxxxxxx>
Arnd
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