From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id 174ECC5B572 for ; Mon, 17 Aug 2026 06:23:27 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20210309; h=Sender:List-Subscribe:List-Help :List-Post:List-Archive:List-Unsubscribe:List-Id:Content-Transfer-Encoding: Content-Type:In-Reply-To:From:References:Cc:To:Subject:MIME-Version:Date: Message-ID:Reply-To:Content-ID:Content-Description:Resent-Date:Resent-From: Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID:List-Owner; bh=jOw+j1q+Tq+Mexz//qGGI8SqaRBLcQGBThbcAl9p1Go=; b=z1o8Ojb1PIR1Vnmap4L1A8v36w tH4qNgTv5cApiw8QAH2mnzLmj5Y7zb7c9JMbA+OW6Wtrmlcya34JFXOoqq3Y4FYinYwCMKBtM7WDJ f7KyszmkprpERBTiSi6oqO8ITpwcXu4JLbGkLBeyFnGSJWEMnRr2lTK8YlM+/SdM9i5IDl7gQMZqe B48UEbficPIhAfruK44XCzWGFsBs9lvwLjbhK4MQJuVPwFfQHM2aRLZy4HrNeLq3s8S1tx2lL/YYH YuA70hurvcaCwIPcaE8EpV7rZEu3Hma558tHEkX/5/VOD9dq1fOubrxGL/v255p96E0u9ZFHzSa0i oFtqjjAw==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.99.1 #2 (Red Hat Linux)) id 1wvqki-00000005Tx0-2p8H; Mon, 17 Aug 2026 06:23:20 +0000 Received: from tor.source.kernel.org ([2600:3c04:e001:324:0:1991:8:25]) by bombadil.infradead.org with esmtps (Exim 4.99.1 #2 (Red Hat Linux)) id 1wvqkh-00000005Twq-1nE5; Mon, 17 Aug 2026 06:23:19 +0000 Received: from smtp.kernel.org (quasi.space.kernel.org [100.103.45.18]) by tor.source.kernel.org (Postfix) with ESMTP id 2A255600AE; Mon, 17 Aug 2026 06:23:18 +0000 (UTC) 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 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 X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org 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