AM5728: BeagleBoard-X15 USB not working

just compiled Linux kernel for BeagleBoard-X15 but somehow USB is not working

Kernel compile instructions:

$ git clone [](
$ cd linux
$ export ARCH=arm
$ export CROSS_COMPILE=~/x-tools/arm-cortexa9_neon-linux-gnueabihf/bin/arm-cortexa9_neon-linux-gnueabihf-
$ ``make omap2plus_defconfig
$ make menuconfig
$ make uImage LOADADDR=0x82000000 -j4
$ make -j4

The kernel boots fine but there are USB errors:

[ 3.106985] dwc3 48890000.usb: Failed to get clk 'ref': -2

Any help would be appreciated, find below complete log.


For bootlog and kernel configuration refer to
Refer to [](

You should really report this to the linux-omap mailing list:

So it can be fixed asap.