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[2a00:1028:c000:ddf:7da7:6ec:e37a:72d]) by smtp.gmail.com with ESMTPSA id 5b1f17b1804b1-4a18e49792bsm460701895e9.4.2026.10.12.05.53.10 (version=TLS1_3 cipher=TLS_CHACHA20_POLY1305_SHA256 bits=256/256); Mon, 12 Oct 2026 05:53:11 -0700 (PDT) From: Josef Schlehofer To: Sean Wang , JB Tsai , Allan Wang Cc: Felix Fietkau , Lorenzo Bianconi , Ryder Lee , Shayne Chen , Quan Zhou , linux-wireless@vger.kernel.org, linux-mediatek@lists.infradead.org Subject: mt7925: status LED of USB adapters and linux-firmware Date: Mon, 12 Oct 2026 14:53:10 +0200 Message-ID: <20261012125310.13917-1-pepe.schlehofer@gmail.com> X-Mailer: git-send-email 2.54.0 Precedence: bulk X-Mailing-List: linux-wireless@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Hi, The status LED of MT7925 USB adapters stays off on Linux. I investigated this with a NETGEAR A9000 (0846:9072), see [1]. MediaTek's Windows driver for the A9000 (mtkwecxu.sys 5.3.0.3230) controls the LED using UNI command 0x2a, with GPIO 8 and a TLV (tag 1) specifying the LED state (on/off). Sending the same command from mt76 works with the firmware from the Windows driver package (MT7925_E1_ASIC_ROM_RAM_CE_2249_CCN10_USB, 20250424), but not with linux-firmware builds (CE_2249_CCN16, tested with 20231227 and 20260813). The latter return status 0 but do not change the LED state. All 16 MT7925 firmware releases currently in linux-firmware are CCN16 builds. Could you clarify: 1. Can GPIO-based LED control be enabled in the linux-firmware build for MT7925 USB adapters? 2. If not, what is the intended way to control these LEDs on Linux? 3. Is GPIO 8 common to all MT7925 USB adapters, or is it board-specific? I have a small mt76 patch that registers the LED for MT7925 USB devices and sends this command. I will submit it once firmware support and GPIO selection are clarified. [1] https://github.com/morrownr/USB-WiFi/issues/731 Thanks, Josef