I'm trying to get the USB-OTG interface working on the DE0-nano-SoC
(socfpga) board by using openSUSE tumbleweed. The image uses ARM-EFI
boot and there is no dtb file on the boot partition. When Linux is
running the device-tree is visible on /proc/device-tree and
/sys/firmware, so there is a device-tree. But there is no dtb file which
I can change for debug purpose. So how to modify the device-tree with
ARM-EFI boot?

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