I have DM368 based customized board. I want to test the USB OTG Functionality for mass storage class. I am facing problem that, i cannot access USB as host when configured in USB OTG Mode. fgrep USB .config | grep -v '^#' CONFIG_USB_SUPPORT=y CONFIG_USB_ARCH_HAS_HCD=y CONFIG_USB=y CONFIG_USB_DEBUG=y CONFIG_USB_ANNOUNCE_NEW_DEVICES=y CONFIG_USB_DEVICEFS=y CONFIG_USB_DEVICE_CLASS=y CONFIG_USB_SUSPEND=y CONFIG_USB_OTG=y CONFIG_USB_OTG_WHITELIST=y CONFIG_USB_WUSB=y CONFIG_USB_C67X00_HCD=y CONFIG_USB_OXU210HP_HCD=y CONFIG_USB_SL811_HCD=y CONFIG_USB_R8A66597_HCD=yn this. CONFIG_USB_HWA_HCD=y CONFIG_USB_MUSB_HDRC=y CONFIG_USB_MUSB_SOC=y CONFIG_USB_MUSB_OTG=y CONFIG_MUSB_SCHEDULE_INTR_EP=y CONFIG_USB_GADGET_MUSB_HDRC=y CONFIG_USB_MUSB_HDRC_HCD=y CONFIG_USB_TI_CPPI_DMA=y CONFIG_USB_MUSB_DEBUG=y CONFIG_USB_STORAGE=y CONFIG_USB_STORAGE_DEBUG=y CONFIG_USB_STORAGE_DATAFAB=y CONFIG_USB_STORAGE_FREECOM=y CONFIG_USB_STORAGE_ISD200=y CONFIG_USB_STORAGE_USBAT=y CONFIG_USB_STORAGE_SDDR09=y CONFIG_USB_STORAGE_SDDR55=y CONFIG_USB_STORAGE_JUMPSHOT=y CONFIG_USB_STORAGE_ALAUDA=y CONFIG_USB_STORAGE_ONETOUCH=y CONFIG_USB_STORAGE_KARMA=y CONFIG_USB_STORAGE_CYPRESS_ATACB=y CONFIG_USB_LIBUSUAL=y CONFIG_USB_GADGET=y CONFIG_USB_GADGET_DEBUG=y CONFIG_USB_GADGET_DEBUG_FILES=y CONFIG_USB_GADGET_DEBUG_FS=y CONFIG_USB_GADGET_VBUS_DRAW=20 CONFIG_USB_GADGET_SELECTED=y CONFIG_USB_GADGET_DUALSPEED=y CONFIG_USB_GADGETFS=m CONFIG_USB_FILE_STORAGE=m CONFIG_USB_FILE_STORAGE_TEST=y CONFIG_USB_OTG_UTILS=y CONFIG_NOP_USB_XCEIV=y I executed following command to switch into host mode modprobe g_file_storage echo "F" > /proc/driver/musb_hdrc I am getting following error when mass storage device is connected. [ 83.310000] hub 1-0:1.0: unable to enumerate USB device on port 1 [ 86.040000] musb_bus_suspend 2406: trying to suspend as a_host while active [ 86.160000] usb 1-1: new high speed USB device using musb_hdrc and address 8 [ 86.300000] usb 1-1: device v8564 p1000 is not supported Error message continuous with incremental address. Please let me know where i am going wrong. Is there any other configuration , which i have left out? Best Regards