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 <sebastian.reichel@collabora.com>
Signed-off-by: Anand Moon <linux.amoon@gmail.com>
---
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";
};
--
2.50.1Hi,
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 <sebastian.reichel@collabora.com>
> Signed-off-by: Anand Moon <linux.amoon@gmail.com>
> ---
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/
Greetings,
-- Sebastian
> 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
>
Hi Sebastian, Thanks for your review comments. On Sat, 3 Jan 2026 at 19:35, Sebastian Reichel <sebastian.reichel@collabora.com> wrote: > > 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 <sebastian.reichel@collabora.com> > > Signed-off-by: Anand Moon <linux.amoon@gmail.com> > > --- > > 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/ > Actually, the Radxa Rock 5 B doesn't have an onboard USB hub chip. The USB_HOST_PWREN_H GPIO pin acts as the enable signal for both 5V_USB1 and 5V_USB2 regulators. Data signals from the USB 2.0 Host 1 interface (USB20_HOST1_DM/DP) are routed through the CON20B chip to the Type-C controller's TYPEC1_OTG_DM/DP pins. Additionally, the schematic indicates that the Type-C controller's power delivery is managed by the USB2 host (5V_USB2) rail. From the schematic, I could see that the Type-C controller is controlled by USB1 host (5V_USB1) and USB2 host (5V_USB2) for power delivery. [1] https://dl.radxa.com/rock5/5b/docs/hw/radxa_rock_5b_v1450_schematic.pdf (page 27) > Greetings, > > -- Sebastian > Thanks -Anand
Hi, On Thu, Jan 08, 2026 at 12:25:12PM +0530, Anand Moon wrote: > Thanks for your review comments. > On Sat, 3 Jan 2026 at 19:35, Sebastian Reichel wrote: > > 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 <sebastian.reichel@collabora.com> > > > Signed-off-by: Anand Moon <linux.amoon@gmail.com> > > > --- > > > > 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/ > > > Actually, the Radxa Rock 5 B doesn't have an onboard USB hub chip. Seriously? I provided the exact page for the hub chip in the schematics and it's easily visisble in lsusb too. I don't want to waste my time and expect a certain level of quality and this is certainly way below it... -- Sebastian
Hi Sebastian,
I am having difficulty articulating my thoughts clearly right now;
please bear with me as I try to explain.
On Sat, 10 Jan 2026 at 05:03, Sebastian Reichel
<sebastian.reichel@collabora.com> wrote:
>
> Hi,
>
> On Thu, Jan 08, 2026 at 12:25:12PM +0530, Anand Moon wrote:
> > Thanks for your review comments.
> > On Sat, 3 Jan 2026 at 19:35, Sebastian Reichel wrote:
> > > 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 <sebastian.reichel@collabora.com>
> > > > Signed-off-by: Anand Moon <linux.amoon@gmail.com>
> > > > ---
> > >
> > > 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/
> > >
> > Actually, the Radxa Rock 5 B doesn't have an onboard USB hub chip.
>
> Seriously? I provided the exact page for the hub chip in the
> schematics and it's easily visisble in lsusb too.
>
My apologies for the confusion. To clarify, this board lacks a USB hub
chip that matches the
detected USB IDs and is capable of powering both USB 2.0 and USB 3.0 interfaces.
[1] https://github.com/torvalds/linux/blob/master/Documentation/devicetree/bindings/usb/microchip%2Cusb2514.yaml
This is the reason we have a separate power regulator for USB 2.0 and
USB 3.0 ports
and Type-C controllers.
There is a USB2HUB -> U90078 FE1.1s_QFN chip (page 27) in the schematics,
It's probably connected to the PCIE M.2 NGFF for Bluetooth
[2] https://www.snapeda.com/parts/FE1.1s-BQFN24B/Terminus-Tech/datasheet/
$ lsusb -tv
/: Bus 001.Port 001: Dev 001, Class=root_hub, Driver=ehci-platform/1p, 480M
ID 1d6b:0002 Linux Foundation 2.0 root hub
|__ Port 001: Dev 002, If 0, Class=Hub, Driver=hub/4p, 480M
ID 1a40:0101 Terminus Technology Inc. Hub
|__ Port 003: Dev 003, If 0, Class=Wireless, Driver=btusb, 12M
ID 8087:0a2b Intel Corp. Bluetooth wireless interface
|__ Port 003: Dev 003, If 1, Class=Wireless, Driver=btusb, 12M
ID 8087:0a2b Intel Corp. Bluetooth wireless interface
/: Bus 002.Port 001: Dev 001, Class=root_hub, Driver=ohci-platform/1p, 12M
ID 1d6b:0001 Linux Foundation 1.1 root hub
/: Bus 003.Port 001: Dev 001, Class=root_hub, Driver=ehci-platform/1p, 480M
ID 1d6b:0002 Linux Foundation 2.0 root hub
/: Bus 004.Port 001: Dev 001, Class=root_hub, Driver=ohci-platform/1p, 12M
ID 1d6b:0001 Linux Foundation 1.1 root hub
/: Bus 005.Port 001: Dev 001, Class=root_hub, Driver=xhci-hcd/1p, 480M
ID 1d6b:0002 Linux Foundation 2.0 root hub
/: Bus 006.Port 001: Dev 001, Class=root_hub, Driver=xhci-hcd/1p, 5000M
ID 1d6b:0003 Linux Foundation 3.0 root hub
/: Bus 007.Port 001: Dev 001, Class=root_hub, Driver=xhci-hcd/1p, 480M
ID 1d6b:0002 Linux Foundation 2.0 root hub
/: Bus 008.Port 001: Dev 001, Class=root_hub, Driver=xhci-hcd/1p, 5000M
ID 1d6b:0003 Linux Foundation 3.0 root hub
> I don't want to waste my time and expect a certain level of quality
> and this is certainly way below it...
Please accept my apologies for the miscommunication.
Could you check the enable status of the USB_HOST_PWREN_H pin in the schematics?
USB_HOST_PWREN_H -> VCC5V0_USB20_HOST0 / VCC5V0_USB20_HOST2
USB_HOST_PWREN_H -> VCC5V0_USB30_HOST0 / VCC5V0_USB30_HOST1
My current patch is trying to address this issue.
>
> -- Sebastian
Thanks
-Anand
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