On Sun, Oct 01, 2017 at 06:27:11PM -0400, Nicolas Pitre wrote:

If you prefer, the physical address could be specified with a Kconfig 
symbol just like the kernel link address. Personally I think it is best 
to keep it along with the other root mount args. But going all the way 
with a dynamic driver binding interface and a dummy intermediate name is 
like using a sledge hammer to kill an ant: it will work of course, but 
given the context it is prone to errors due to the added manipulations 
mentioned previously ... and a tad overkill.

As soon as a kernel enables CRAMFS_PHYSMEM this mount option is
available, so you don't just need to think of your use case.

The normal way for doings this would be to specify it in the device
tree.

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