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Sat, 03 Jan 2026 00:32:41 -0800 (PST) Received: from rockpi-5b ([45.112.0.8]) by smtp.gmail.com with ESMTPSA id d9443c01a7336-2a2f3c666d5sm391700365ad.21.2026.01.03.00.32.36 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Sat, 03 Jan 2026 00:32:40 -0800 (PST) From: Anand Moon To: Rob Herring , Krzysztof Kozlowski , Conor Dooley , Heiko Stuebner , Heikki Krogerus , Greg Kroah-Hartman , Sebastian Reichel , FUKAUMI Naoki , Nicolas Frattaroli , Diederik de Haas , Yongbo Zhang , devicetree@vger.kernel.org (open list:OPEN FIRMWARE AND FLATTENED DEVICE TREE BINDINGS), linux-arm-kernel@lists.infradead.org (moderated list:ARM/Rockchip SoC support), linux-rockchip@lists.infradead.org (open list:ARM/Rockchip SoC support), linux-kernel@vger.kernel.org (open list), linux-usb@vger.kernel.org (open list:USB TYPEC CLASS) Cc: Anand Moon Subject: [PATCH v1 0/3] Typc fusb302 powerloss issue on Radxa Rock 5b Date: Sat, 3 Jan 2026 14:01:16 +0530 Message-ID: <20260103083232.9510-1-linux.amoon@gmail.com> X-Mailer: git-send-email 2.50.1 MIME-Version: 1.0 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20260103_003242_504026_159F0313 X-CRM114-Status: GOOD ( 12.44 ) X-BeenThere: linux-rockchip@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: Upstream kernel work for Rockchip platforms List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: "Linux-rockchip" Errors-To: linux-rockchip-bounces+linux-rockchip=archiver.kernel.org@lists.infradead.org Hi All On the Radxa Rock 5B, the system occasionally experiences intermittent hard resets during the boot process. Initially, I suspected a power supply issue, but further investigation points to the Type-C fusb302 module as the cause. Specifically, probing or reloading the fusb302 module triggers a hard reset, which can result in immediate power loss and a reboot. [root@rockpi-5b ~]# rmmod fusb302 [root@rockpi-5b ~]# lsmod | grep fusb302 [root@rockpi-5b ~]# modprobe fusb302 [root@rockpi-5b ~]# [ 3389.031608][ T7143] typec_fusb302 4-0022: Initiating hard-reset, which might result in machine power-loss. [ 3390.030444][ T7143] typec_fusb302 4-0022: Initiating hard-reset, which might result in machine power-loss. I attempted to trace the issue using ftrace but was unable to pinpoint the root cause. The problem appears to originate either from the I2C controller or the PMIC reset. I have identified a potential workaround involving the I2C SCL debounce settings for the RK3588 and submitted a patch here: [1] https://lore.kernel.org/all/20260103052506.6743-1-linux.amoon@gmail.com/ Please note that the submitted changes address a minor aspect but do not fully resolve the underlying issue. Thanks -Anand Anand Moon (3): arm64: dts: rockchip: rk3588-rock-5b-5bp-5t: Correct Type-C pin bias settings arm64: dts: rockchip: rk3588-rock-5b-5bp-5t: Fix USB host phy-supply on Rock 5b-5bp-5t SbC usb: typec: fusb302: Switch to threaded interrupt handler arch/arm64/boot/dts/rockchip/rk3588-rock-5b-5bp-5t.dtsi | 7 +++---- drivers/usb/typec/tcpm/fusb302.c | 7 ++++--- 2 files changed, 7 insertions(+), 7 deletions(-) base-commit: 805f9a061372164d43ddef771d7cd63e3ba6d845 -- 2.50.1 _______________________________________________ Linux-rockchip mailing list Linux-rockchip@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-rockchip