Rockpro64 system log flooded

I am running the 20.10 image on the rockpro64. These 3 lines are written to the system log every second or so

Oct 20 22:07:30 rock64 kernel: busb rockchip_usb2phy_otg_sm_work b_idle otg sm work 1
Oct 20 22:07:30 rock64 kernel: busb HOST = 0,VBUS_EN=0,vbus_attached=1
Oct 20 22:07:30 rock64 kernel: busb vbus_attach rphy->chg_state = 5

I am getting these messages permanently, no matter if there is something connected to an USB port or not. Any idea what causes this?

We have seen this reported before, but really no idea why it happens.

We use the upstream DTS and only do a minimal of patching.

A PCIE patch and another PCIE related patch.