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Thu, 05 Nov 2026 09:44:42 -0800 (PST) Received: from Lord-Beerus.station ([93.66.71.207]) by smtp.gmail.com with ESMTPSA id 5b1f17b1804b1-4b56ba6bc36sm86889775e9.0.2026.11.05.09.44.41 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Thu, 05 Nov 2026 09:44:41 -0800 (PST) Date: Thu, 5 Nov 2026 18:44:39 +0100 From: Stefano Radaelli To: Frank Li Cc: Frank Li , linux-kernel@vger.kernel.org, devicetree@vger.kernel.org, imx@lists.linux.dev, linux-arm-kernel@lists.infradead.org, pierluigi.p@variscite.com, Nate.D@variscite.com, Stefano Radaelli , Rob Herring , Krzysztof Kozlowski , Conor Dooley , Sascha Hauer , Pengutronix Kernel Team , Fabio Estevam , Shawn Guo Subject: Re: [PATCH v1 1/1] arm64: dts: freescale: Move Variscite Ethernet LEDs to carrier boards Message-ID: References: <20261105101739.10614-1-stefano.r@variscite.com> 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-Type: text/plain; charset=utf-8 Content-Disposition: inline Content-Transfer-Encoding: 8bit In-Reply-To: On Thu, Nov 05, 2026 at 11:34:49AM -0600, Frank Li wrote: > On Thu, Nov 05, 2026 at 11:17:39AM +0100, Stefano Radaelli wrote: > > From: Stefano Radaelli > > > > The Ethernet LEDs are physically on the carrier boards, but the > > VAR-SOM-MX8MP, DART-MX91, VAR-SOM-MX93 and DART-MX95 module descriptions > > include their LED nodes. Other carriers therefore inherit LED definitions > > that may not match their wiring. > > what's impact? > Hi Frank, There are two main points: 1. The SOM dtsi is intended to be reused with different carriers. Defining the LEDs there forces every carrier to inherit the reference board’s LED configuration. Customers then have to override those definitions or explicitly delete the LED nodes if their carrier has no LEDs. Keeping the definitions in the carrier DTS avoids requiring customers to undo configuration for hardware that is not part of the SoM. 2. The Ethernet connectors, LEDs and their wiring are on the carrier. Their definitions therefore belong in the carrier DTS, while the SOM dtsi should describe the hardware on the module. This change makes that separation consistent across our boards. There is no functional change for the existing Symphony and Sonata boards: their final device trees retain the same LED configuration. Thank you Frank, Best Regards, Stefano