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[79.44.170.80]) by smtp.gmail.com with ESMTPSA id 4fb4d7f45d1cf-615a8f2c265sm18398979a12.26.2025.08.11.07.10.50 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Mon, 11 Aug 2025 07:10:50 -0700 (PDT) From: Andrea della Porta To: Andrea della Porta , Michael Turquette , Stephen Boyd , Rob Herring , Krzysztof Kozlowski , Conor Dooley , Florian Fainelli , Broadcom internal kernel review list , Lorenzo Pieralisi , Krzysztof Wilczynski , Bjorn Helgaas , Linus Walleij , Catalin Marinas , Will Deacon , Bartosz Golaszewski , Derek Kiernan , Dragan Cvetic , Arnd Bergmann , Greg Kroah-Hartman , Saravana Kannan , linux-clk@vger.kernel.org, devicetree@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org, linux-pci@vger.kernel.org, linux-gpio@vger.kernel.org, Masahiro Yamada , Stefan Wahren , Herve Codina , Luca Ceresoli , Thomas Petazzoni , Andrew Lunn , Phil Elwell , Dave Stevenson , kernel-list@raspberrypi.com, Matthias Brugger , iivanov@suse.de, svarbanov@suse.de Subject: [PATCH 2/2] arm64: dts: broadcom: amend the comment about the role of BCM2712 board DTS Date: Mon, 11 Aug 2025 16:12:35 +0200 Message-ID: <47f6368a77d6bd846c02942d20c07dd48e0ae7df.1754914766.git.andrea.porta@suse.com> X-Mailer: git-send-email 2.44.0 In-Reply-To: References: Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset="utf-8" Current board DTS for Raspberry Pi5 states that bcm2712-rpi-5-b.dts should not be modified and all declarations should go in the overlay board DTS instead (bcm2712-rpi-5-b-ovl-rp1.dts). There's a caveat though: there's currently no infrastructure to reliably reference nodes that have not been declared yet, as is the case when loading those nodes from a runtime overlay. For more details about these limitations see [1] and follow-ups. Change the comment to make it clear which DTS file will host specific nodes, especially the RP1 related nodes which should be customized outside the overlay DTS. Link [1] - https://lore.kernel.org/all/CAMEGJJ3=3DW8_R0xBvm8r+Q7iExZx8xPBHEWWGAT= 9ngpGWDSKCaQ@mail.gmail.com/ Signed-off-by: Andrea della Porta --- arch/arm64/boot/dts/broadcom/bcm2712-rpi-5-b.dts | 10 ++++++++-- 1 file changed, 8 insertions(+), 2 deletions(-) diff --git a/arch/arm64/boot/dts/broadcom/bcm2712-rpi-5-b.dts b/arch/arm64/= boot/dts/broadcom/bcm2712-rpi-5-b.dts index adad85e68f1b..865f092608a6 100644 --- a/arch/arm64/boot/dts/broadcom/bcm2712-rpi-5-b.dts +++ b/arch/arm64/boot/dts/broadcom/bcm2712-rpi-5-b.dts @@ -4,8 +4,14 @@ * the RP1 driver to load the RP1 dtb overlay at runtime, while * bcm2712-rpi-5-b.dts (this file) is the fully defined one (i.e. it * already contains RP1 node, so no overlay is loaded nor needed). - * This file is not intended to be modified, nodes should be added - * to the included bcm2712-rpi-5-b-ovl-rp1.dts. + * This file is intended to host the override nodes for the RP1 peripheral= s, + * e.g. to declare the phy of the ethernet interface or the custom pin set= up + * for several RP1 peripherals. + * This in turn is due to the fact that there's no current generic + * infrastructure to reference nodes (i.e. the nodes in rp1-common.dtsi) t= hat + * are not yet defined in the DT since they are loaded at runtime via over= lay. + * All other nodes that do not have anything to do with RP1 should be added + * to the included bcm2712-rpi-5-b-ovl-rp1.dts instead. */ =20 /dts-v1/; --=20 2.35.3