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

From: Florian Fainelli

Date: Thu Aug 13 2026 - 12:35:03 EST


On 8/13/26 06:48, Ian Rogers wrote:
On Thu, Aug 13, 2026 at 2:08 AM Peter Robinson <pbrobinson@xxxxxxxxx> wrote:

On Wed, 12 Aug 2026 at 09:28, Will Deacon <will@xxxxxxxxxx> 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