Re: Could the DTS experts look at this?

Arnd Bergmann wrote:

Maybe we can introduce a more generic way of having conditional
device nodes in the tree that get knocked out in the boot wrapper.

I've been thinking about doing just this for quite some time now.  I've had a 
few informal discussions without people about.

One idea is to allow attaching simple conditional expressions (like X is <, =, 
or > than Y) to a node.  It is the responsibility of the code that parses the 
device tree to assign values to X and Y.  For instance, they could be the names 
of U-Boot environment variables.  If the expression is false, then the node is 
removed (or ignored) from the device tree.  If it's true, then it's kept in.

-- 
Timur Tabi
Linux kernel developer at Freescale