linux-kernel - [RFC PATCH 3/3] riscv: dts: starfive: jh7110-pine64-star64: force no USB overcurrent

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-ID: <20250422162250.436169-4-uwu@icenowy.me>
Date: Wed, 23 Apr 2025 00:22:50 +0800
From: Icenowy Zheng <uwu@...nowy.me>
To: Emil Renner Berthing <kernel@...il.dk>,
	Jianlong Huang <jianlong.huang@...rfivetech.com>,
	Hal Feng <hal.feng@...rfivetech.com>,
	Linus Walleij <linus.walleij@...aro.org>,
	Rob Herring <robh@...nel.org>,
	Krzysztof Kozlowski <krzk+dt@...nel.org>,
	Conor Dooley <conor+dt@...nel.org>
Cc: linux-gpio@...r.kernel.org,
	devicetree@...r.kernel.org,
	linux-kernel@...r.kernel.org,
	linux-riscv@...ts.infradead.org,
	Icenowy Zheng <uwu@...nowy.me>
Subject: [RFC PATCH 3/3] riscv: dts: starfive: jh7110-pine64-star64: force no USB overcurrent

The Star64 board has no GPIOs to indicate USB overcurrent, however the
USB controller would stop to work if the overcurrent_n signal it gets is
low (which means overcurrent situations happening because of the _n).

Use the pin controller to force the overcurrent_n signal to be high in
order to ensure stable behavior of the USB controller.

Signed-off-by: Icenowy Zheng <uwu@...nowy.me>
---
 arch/riscv/boot/dts/starfive/jh7110-pine64-star64.dts | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/arch/riscv/boot/dts/starfive/jh7110-pine64-star64.dts b/arch/riscv/boot/dts/starfive/jh7110-pine64-star64.dts
index 31e825be2065a..dab0e0054e648 100644
--- a/arch/riscv/boot/dts/starfive/jh7110-pine64-star64.dts
+++ b/arch/riscv/boot/dts/starfive/jh7110-pine64-star64.dts
@@ -81,6 +81,8 @@ &spi0 {
 };
 
 &sysgpio {
+	starfive,force-high-inputs = <GPI_SYS_USB_OVERCURRENT>;
+
 	usb0_pins: usb0-0 {
 		vbus-pins {
 			pinmux = <GPIOMUX(25,  GPOUT_SYS_USB_DRIVE_VBUS,
-- 
2.49.0