[PATCH v4 0/2] perf: Add Raspberry Pi AXI PMU driver

Florian Fainelli florian.fainelli at broadcom.com
Thu Aug 13 09:34:29 PDT 2026


On 8/13/26 06:48, Ian Rogers wrote:
> On Thu, Aug 13, 2026 at 2:08 AM Peter Robinson <pbrobinson at gmail.com> wrote:
>>
>> On Wed, 12 Aug 2026 at 09:28, Will Deacon <will at kernel.org> wrote:
>>>
>>> On Tue, Aug 11, 2026 at 10:24:15PM -0700, Ian Rogers wrote:
>>>> This patch series adds an uncore Performance Monitoring Unit (PMU) driver
>>>> for Broadcom AXI system and VideoCore VPU performance monitors found on
>>>> Raspberry Pi SoCs (BCM2835 through BCM2712 / Raspberry Pi 1 through 5).
>>>
>>> Why are you sending four versions of this patch series, at -rc7, each in
>>> reply to the previous one? Nobody is going to review that.
>>
>> I'm also wondering why this is called rpi_axi_pmu where it very much
>> looks like Broadcom IP, and is possibly used in other Broadcom SoCs,
>> Florian can you confirm what this driver should be called?
> 
> I'm somewhat agnostic regarding the naming, and having a more general
> driver strikes me as a good thing. Fwiw, I based the name on a
> somewhat similarly named non-perf-compliant driver:
> https://github.com/raspberrypi/linux/blob/rpi-6.18.y/drivers/perf/raspberrypi_axi_monitor.c

Given this uses the Raspberry Pi firmware interface, having 
rpi/rasbperrypi in the name is sensible IMHO, but the IP is technically 
from Broadcom AFAICT, so using a bcm2835 prefix wouldn't be far off.

Ian, I am really having a hard time following all of your frequent 
submissions, would you mind waiting for feedback before spinning new 
versions?

Thanks!
-- 
Florian



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