Re: [PATCH v1 2/3] arm64: dts: rockchip: rk3588-rock-5b-5bp-5t: Fix USB host phy-supply on Rock 5b-5bp-5t SbC
From: Sebastian Reichel <hidden>
Date: 2026-01-03 14:05:28
Also in:
linux-devicetree, linux-rockchip, linux-usb, lkml
Hi, On Sat, Jan 03, 2026 at 02:01:18PM +0530, Anand Moon wrote:
The USB host USB2 and USB3 on the Rock 5B, 5BP, and 5T is powered by the USB_HOST_PWREN_H gpio pin which is used to enable vcc5v0_host host regulator which ensures proper power sequencing and management for onboard Double-USB-HOST. Update the u2phy2_host node to reference the correct phy-supply. Cc: Sebastian Reichel <redacted> Signed-off-by: Anand Moon <redacted> ---
u2phy2_host is connected to an onboard USB hub chip, which is powered by &vcc5v0_sys as the comment says. You can see this on page 9 of the v1.45 ROCK 5B schematics (page name USB2HUB). The usb hub chip uses VCC5V0_SYS + VCC_3V3_S0 and is connected to USB20_HOST0_DP, USB20_HOST0_DM. The related USB controller for that in the upstream DT is &usb_host0_ehci, which in turn is using &u2phy2_host. Thus at least for the ROCK 5B the existing DT is correct. Properly describing the downstream port VBUS regulator would require something like the following series: https://lore.kernel.org/all/20250911-v6-16-topic-usb-onboard-dev-v4-0-1af288125d74@pengutronix.de/ (local) Greetings, -- Sebastian
quoted hunk ↗ jump to hunk
arch/arm64/boot/dts/rockchip/rk3588-rock-5b-5bp-5t.dtsi | 3 +-- 1 file changed, 1 insertion(+), 2 deletions(-)diff --git a/arch/arm64/boot/dts/rockchip/rk3588-rock-5b-5bp-5t.dtsi b/arch/arm64/boot/dts/rockchip/rk3588-rock-5b-5bp-5t.dtsi index 0cd8ac7bf538..886d788572fc 100644 --- a/arch/arm64/boot/dts/rockchip/rk3588-rock-5b-5bp-5t.dtsi +++ b/arch/arm64/boot/dts/rockchip/rk3588-rock-5b-5bp-5t.dtsi@@ -981,8 +981,7 @@ &u2phy2 { }; &u2phy2_host { - /* connected to USB hub, which is powered by vcc5v0_sys */ - phy-supply = <&vcc5v0_sys>; + phy-supply = <&vcc5v0_host>; status = "okay"; };-- 2.50.1
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