Re: [PATCH v2 1/5] dt-bindings: gpu: add bindings for the ARM Mali Midgard GPU

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On 18/04/17 10:15, Guillaume Tucker wrote:
Hi Rob,

On 04/04/17 03:00, Rob Herring wrote:
On Sun, Apr 02, 2017 at 08:59:44AM +0100, Guillaume Tucker wrote:

+- operating-points : Refer to Documentation/devicetree/bindings/power/opp.txt
+  for details.

Is this going to be sufficient vs. operating-points-v2? Or should it be
a power domain with OPPs?

In principle, switching to operating-points-v2 should be very
straightforward.  I have smoke-tested the driver with an
operating-points-v2 table and a phandle to it inside the gpu node
in place of operating-points and it seems to be working fine.  At
least it parsed the OPPs and got initialised correctly.

My understanding is that operating-points (v1) are not deprecated
so we could keep the bindings as-is, but please let me know
otherwise and I can try to address that in my next patch version.
In the documentation, it should only be the case of replacing
operating-points with operating-points-v2.

While the opp bindings documentation doesn't mention anything
about operating-points being deprecated, the code and comments in
of.c are pretty clear about this:

	/*
	 * OPPs have two version of bindings now. The older one is deprecated,
	 * try for the new binding first.
	 */

So I shall use operating-points-v2 in my patch v4.

Thanks,
Guillaume
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