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Tue, 27 Oct 2026 18:51:07 -0700 (PDT) Received: from localhost.localdomain ([240e:36d:b08:2bc0::a60]) by smtp.gmail.com with ESMTPSA id d9443c01a7336-2eae6c33917sm16066835ad.48.2026.10.27.18.51.01 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Tue, 27 Oct 2026 18:51:06 -0700 (PDT) From: Jianfeng Liu To: quentin.schulz@cherry.de Cc: HystericalDragons@proton.me, amadeus@jmu.edu.cn, conor+dt@kernel.org, devicetree@vger.kernel.org, heiko@sntech.de, hrushirajg23@gmail.com, krzk+dt@kernel.org, krzk@kernel.org, linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org, linux-rockchip@lists.infradead.org, liujianfeng1994@gmail.com, macromorgan@hotmail.com, michael.opdenacker@rootcommit.com, naoki@radxa.com, robh@kernel.org Subject: Re: [PATCH 1/3] dt-bindings: arm: rockchip: Add ArmSoM Sige7s Date: Wed, 28 Oct 2026 09:50:58 +0800 Message-ID: <20261028015058.11163-1-liujianfeng1994@gmail.com> X-Mailer: git-send-email 2.47.3 In-Reply-To: <2a1c33c9-8971-4054-a463-60f3ceddd627@cherry.de> References: <2a1c33c9-8971-4054-a463-60f3ceddd627@cherry.de> X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Post: List-Help: List-Subscribe: List-Unsubscribe: List-Owner: Precedence: list MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Hi Quentin, On Tue, 27 Oct 2026 17:03:02 +0100, Quentin Schulz wrote: > From U-Boot's perspective, I would have preferred there be a simple >difference we can detect at runtime and based on that decide which >device tree to load between coolpi-4b and armsom-sige7s. Maybe we can ask ArmSom to write some OEM strings into the OTP of SoC. So we can use one defconfig for two boards. I will check this method with ArmSoM and current OTP support in u-boot. >I don't know Heiko's or Krzysztof's opinion here, but I think it would >better reflect the actual context to NOT use a dtsi and simply have >arch/arm64/boot/dts/rockchip/rk3588s-armsom-sige7s.dts include >arch/arm64/boot/dts/rockchip/rk3588s-coolpi-4b.dts and update the model >and compatible properties. Thanks for the suggestion. I checked the existing mainline DTS files and found similar examples, such as stm32mp157c-ev1.dts including stm32mp157c-ed1.dts directly, and the ARM Juno SCMI variants including their base board DTS files. I agree that directly including rk3588s-coolpi-4b.dts would better reflect the relationship between the two boards and avoid unnecessary changes to the existing CoolPi DTS. I'll use this approach in v2 unless Heiko prefers otherwise. Best regards, Jianfeng