linux-kernel - [PATCH v1 0/3] Typc fusb302 powerloss issue on Radxa Rock 5b

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Message-ID: <20260103083232.9510-1-linux.amoon@gmail.com>
Date: Sat,  3 Jan 2026 14:01:16 +0530
From: Anand Moon <linux.amoon@...il.com>
To: Rob Herring <robh@...nel.org>,
	Krzysztof Kozlowski <krzk+dt@...nel.org>,
	Conor Dooley <conor+dt@...nel.org>,
	Heiko Stuebner <heiko@...ech.de>,
	Heikki Krogerus <heikki.krogerus@...ux.intel.com>,
	Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
	Sebastian Reichel <sebastian.reichel@...labora.com>,
	FUKAUMI Naoki <naoki@...xa.com>,
	Nicolas Frattaroli <nicolas.frattaroli@...labora.com>,
	Diederik de Haas <didi.debian@...ow.org>,
	Yongbo Zhang <giraffesnn123@...il.com>,
	devicetree@...r.kernel.org (open list:OPEN FIRMWARE AND FLATTENED DEVICE TREE BINDINGS),
	linux-arm-kernel@...ts.infradead.org (moderated list:ARM/Rockchip SoC support),
	linux-rockchip@...ts.infradead.org (open list:ARM/Rockchip SoC support),
	linux-kernel@...r.kernel.org (open list),
	linux-usb@...r.kernel.org (open list:USB TYPEC CLASS)
Cc: Anand Moon <linux.amoon@...il.com>
Subject: [PATCH v1 0/3] Typc fusb302 powerloss issue on Radxa Rock 5b

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@...kpi-5b ~]# rmmod fusb302
[root@...kpi-5b ~]# lsmod | grep  fusb302
[root@...kpi-5b ~]# modprobe fusb302
[root@...kpi-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