USB3_SSIFCMD
u32 val = usb3_read(usb3, USB3_SSIFCMD);
usb3_clear_bit(usb3, bits, USB3_SSIFCMD);
usb3_set_bit(usb3, bits, USB3_SSIFCMD);
usb3_clear_bit(usb3, bits, USB3_SSIFCMD);
usb3_set_bit(usb3, bits, USB3_SSIFCMD);