dtc: invalid option -- 'i'

[Sharma Bhupesh-B45370]

Hi List,

I am using a 64-bit ubuntu machine running a 12.04 LTS.
I see that the DTC (Device Tree Compiler) version is 1.3.0

$ dtc -v
Version: DTC 1.3.0

When I try to  compile the latest u-boot 'master' branch (updated yesterday), I get the
following error with dtc:

dtc: invalid option -- 'i'

followed by a Usage suggestion.

I checked that a newer DTC version 1.4.0 is available from Linaro, but I can't find
an updated version for ubuntu and apt-get returns me a message:

device-tree-compiler is already the newest version

Any pointers to what I could be doing wrong here?

Regards,
Bhupesh