Re: [PATCH 01/10] dt/bindings: Add binding for BCM2835 mailbox driver

On 03/12/2015 05:23 PM, Eric Anholt wrote:
...

The power-domain rework ended up not working out -- it needs the 
power-domain part of device/base to support throwing -EPROBE_DEFER
if the driver hasn't probed yet,

That makese sense.

unless we're willing to just bake in the power domain driver in
static init ordering.

Indeed, that's quite unlikely to be acceptable.

Device base maintainers weren't excited about my patch for
-EPROBE_DEFER, because then a new DT would mean we start failing to
probe the USB driver in an older kernel, which whould be a
regression in the case that the user had U-Boot setting up USB for
them.

The main ABI issue is that old DTs should work with new kernels. The
other way around is nice, but certainly not as strict a requirement. I
don't think that should block a change. Do you have a link to the
thread; I don't think I noticed it.
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