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Tue, 18 Nov 2025 23:11:49 -0800 (PST) Received: from wenstp920.tpe.corp.google.com ([2a00:79e0:201d:8:d42c:6a2b:5251:a121]) by smtp.gmail.com with ESMTPSA id d9443c01a7336-2985c2bf1ddsm197554725ad.92.2025.11.18.23.11.47 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Tue, 18 Nov 2025 23:11:48 -0800 (PST) From: Chen-Yu Tsai To: Rob Herring , Krzysztof Kozlowski , Conor Dooley Cc: Chen-Yu Tsai , devicetree@vger.kernel.org, chrome-platform@lists.linux.dev, Julius Werner , linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org Subject: [PATCH] dt-bindings: firmware: coreboot: Document optional device specific properties Date: Wed, 19 Nov 2025 15:11:25 +0800 Message-ID: <20251119071126.1719405-1-wenst@chromium.org> X-Mailer: git-send-email 2.52.0.rc1.455.g30608eb744-goog 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" Coreboot, or the ChromeOS second stage bootloader, depthcharge, will insert device specific properties into the coreboot firmware node when there are valid values. Document these properties in the binding. Signed-off-by: Chen-Yu Tsai --- Documentation/devicetree/bindings/firmware/coreboot.txt | 9 +++++++++ 1 file changed, 9 insertions(+) diff --git a/Documentation/devicetree/bindings/firmware/coreboot.txt b/Docu= mentation/devicetree/bindings/firmware/coreboot.txt index 4c955703cea8..0d04ea482aa9 100644 --- a/Documentation/devicetree/bindings/firmware/coreboot.txt +++ b/Documentation/devicetree/bindings/firmware/coreboot.txt @@ -21,6 +21,15 @@ Required properties: 0xc0389481 that resides in the topmost 8 bytes of the area. See coreboot's src/include/imd.h for details. =20 +Optional properties: +- board-id: Contains the board revision number. +- ram-code: Contains the board's DRAM configuration type. +- sku-id: Contains the device variant SKU ID. +- fw-config: Contains the device variant FW config value. + +The optional properties are only populated if the values parsed by coreboot +are valid. + Example: firmware { ranges; --=20 2.52.0.rc1.455.g30608eb744-goog