Hi Li Jun, Since commit 746f316b753a ("usb: chipidea: introduce imx7d USB charger detection") in linux-next, the following error log is seen on a imx7s-warp board: [ 4.919845] usbmisc_imx 30b10200.usbmisc: vbus is error [ 4.925173] usbmisc_imx 30b10200.usbmisc: Error occurs during detection: -22 What is the proper way to address this? Thanks, Fabio Estevam