[PATCH V7 1/3] OPP: Add new bindings to address shortcomings of existing bindings
Nishanth Menon
nm at ti.com
Tue Jun 16 06:34:02 PDT 2015
On 06/04/2015 11:20 AM, Viresh Kumar wrote:
> Current OPP (Operating performance point) device tree bindings have been
> insufficient due to the inflexible nature of the original bindings. Over
> time, we have realized that Operating Performance Point definitions and
> usage is varied depending on the SoC and a "single size (just frequency,
> voltage) fits all" model which the original bindings attempted and
> failed.
>
> The proposed next generation of the bindings addresses by providing a
> expandable binding for OPPs and introduces the following common
> shortcomings seen with the original bindings:
>
> - Getting clock/voltage/current rails sharing information between CPUs.
> Shared by all cores vs independent clock per core vs shared clock per
> cluster.
>
> - Support for specifying current levels along with voltages.
>
> - Support for multiple regulators.
>
> - Support for turbo modes.
>
> - Other per OPP settings: transition latencies, disabled status, etc.?
>
> - Expandability of OPPs in future.
>
> This patch introduces new bindings "operating-points-v2" to get these problems
> solved. Refer to the bindings for more details.
>
> We now have multiple versions of OPP binding and only one of them should
> be used per device.
>
> Reviewed-by: Rob Herring <robh at kernel.org>
> Signed-off-by: Viresh Kumar <viresh.kumar at linaro.org>
I thought I had acked the patch 1 of the series as well in the list,
but looks like I have'nt.. So, for the record..
Acked-by: Nishanth Menon <nm at ti.com>
Thanks for doing this.
--
Regards,
Nishanth Menon
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