From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-alma10-1.taild15c8.ts.net [100.103.45.18]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 5BC9E30568B; Mon, 17 Aug 2026 06:23:18 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=100.103.45.18 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1786947799; cv=none; b=ICX//oinKzUaO5j2eO0UbA4n+ZBhUEqI9RQJYXACKPVLLQyUaFn5ZJ0sz9/FmOGfjMOCHmU49qYI59xAWIVhjmj06UMezN86Q4476I6cyWPUHl9Tnypu8Nc1mDtVZf2jQMmxwfYH342k2QIDHxwM6Zq6+ejXOutMBpGkoZdIJYg= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1786947799; c=relaxed/simple; bh=sIyThNWYWnlWHpUxaSlXTe6JeQIRE+fhcjoMqfYf4xg=; h=Message-ID:Date:MIME-Version:Subject:To:Cc:References:From: In-Reply-To:Content-Type; b=avA7/o9qC3myvA9zx/VM0f5Gcezeg7HR6N7aRAsaqdcOBF7K4OZMxDZBkZnjfJVzqapxOuqP5ni2a39x7pk5ouL5ModooS7iLksuB3aBMs5ITKowdC4hvl/BYhUDTUm42ZH19LjmhiY+cUGWAFSqv/NBXTwsesmfjoIa9Qqk/Ho= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=YNwPL6Qm; arc=none smtp.client-ip=100.103.45.18 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b="YNwPL6Qm" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 999F31F000E9; Mon, 17 Aug 2026 06:23:15 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=kernel.org; s=k20260515; t=1786947797; bh=jOw+j1q+Tq+Mexz//qGGI8SqaRBLcQGBThbcAl9p1Go=; h=Date:Subject:To:Cc:References:From:In-Reply-To; b=YNwPL6QmU5C3HJm060nzfgtL+xf0UOxLnRJdelGugZbuMDrb5lip493qGL9lQgExP tl2Ti6fXt1XPb8c2fg2Z12VDvqf+cGwYZuKa0JcBTHt9LGDSV2LPM5EgXacy+7/Opr NjeuGrnxORsx2Ibg0lLhpjAJnfoK+6sVs3zMvxxwYcD3lbFkPYJOwsM9k0kt4iP71N U9r6/fCJ4ZMPQfRHmFe9MFHN0Q4QZ35hgVGsHdVP8GhPrlrcam0o3yqMQ1hAZvVYuF vt26w5nKTwR0coqYQj2p/aDjPnqWOnPGnJ6C9qhniNQBQxj2UYkiHFa/TduuYW5Jf6 nvydrMdKvWwww== Message-ID: Date: Mon, 17 Aug 2026 08:23:13 +0200 Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: [PATCH v13 1/3] dt-bindings: perf: Add Broadcom Raspberry Pi AXI PMU definition To: Ian Rogers , florian.fainelli@broadcom.com, linux-perf-users@vger.kernel.org, linux-rpi-kernel@lists.infradead.org Cc: linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org, pbrobinson@gmail.com References: <20260815082048.4043217-1-irogers@google.com> <20260815172712.50119-1-irogers@google.com> <20260815172712.50119-2-irogers@google.com> From: Krzysztof Kozlowski Content-Language: en-US Autocrypt: addr=krzk@kernel.org; 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charset=UTF-8 Content-Transfer-Encoding: 7bit On 15/08/2026 19:27, Ian Rogers wrote: > Add Device Tree bindings for the Broadcom AXI PMU hardware blocks present > in the Raspberry Pi SoC line (BCM2835, BCM2711, BCM2712). > > Depending on the SoC and security configuration, these PMUs support either > direct MMIO access or routing via the Raspberry Pi firmware Mailbox IPC. > The bindings support defining 1 or 2 backing MMIO regions natively map > the system and VPU control surfaces. > > Assisted-by: Antigravity:gemini-3.6-flash > Signed-off-by: Ian Rogers > --- > .../bindings/perf/brcm,bcm2835-axiperf.yaml | 77 +++++++++++++++++++ > 1 file changed, 77 insertions(+) > create mode 100644 Documentation/devicetree/bindings/perf/brcm,bcm2835-axiperf.yaml > > diff --git a/Documentation/devicetree/bindings/perf/brcm,bcm2835-axiperf.yaml b/Documentation/devicetree/bindings/perf/brcm,bcm2835-axiperf.yaml > new file mode 100644 > index 000000000000..8a4857aa448c > --- /dev/null > +++ b/Documentation/devicetree/bindings/perf/brcm,bcm2835-axiperf.yaml > @@ -0,0 +1,77 @@ > +# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause) > +%YAML 1.2 > +--- > +$id: http://devicetree.org/schemas/perf/brcm,bcm2835-axiperf.yaml# > +$schema: http://devicetree.org/meta-schemas/core.yaml# > + > +title: Broadcom BCM2835/2711/2712 AXI Performance Monitor > + > +maintainers: > + - Ian Rogers > + > +description: | > + The Broadcom BCM2835 series (including BCM2711 and BCM2712) features hardware > + performance monitors on the AXI bus for evaluating memory bandwidth and > + system traffic. Depending on the SoC architecture, multiple monitors exist. > + The primary > + monitor evaluates the System fabric, while the secondary monitor evaluates the > + VideoCore VPU hardware. > + > + Older silicon generally restricts direct MMIO access to the VPU endpoints, > + requiring them to be accessed over the Raspberry Pi firmware mailbox > + interface. If the VPU endpoints are memory-mapped, they are supplied as > + secondary resources. > + > +properties: > + compatible: > + enum: > + - brcm,bcm2835-axiperf > + - brcm,bcm2711-axiperf > + - brcm,bcm2712-axiperf > + > + reg: > + minItems: 1 > + maxItems: 2 > + description: | > + Memory-mapped I/O resource regions for the AXI PMU endpoints. > + Typically ordered as System monitor, followed by VPU monitor if directly > + mapped. > + > + firmware: > + $ref: /schemas/types.yaml#/definitions/phandle This was already rejected. https://lore.kernel.org/all/?q=broadcom+firmware > + description: | > + Phandle to the Raspberry Pi firmware node. Required on older silicon > + (BCM2835-BCM2711) where VideoCore VPU endpoints are exclusively accessed > + via firmware mailbox IPC. Best regards, Krzysztof