linux-kernel - Re: [PATCH v4 09/12] dt-bindings: PM / OPP: add opp-throttlers property

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Date:   Mon, 25 Jun 2018 09:33:41 -0600
From:   Rob Herring <robh@...nel.org>
To:     Matthias Kaehlcke <mka@...omium.org>
Cc:     MyungJoo Ham <myungjoo.ham@...sung.com>,
        Kyungmin Park <kyungmin.park@...sung.com>,
        Chanwoo Choi <cw00.choi@...sung.com>,
        Arnd Bergmann <arnd@...db.de>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        Mark Rutland <mark.rutland@....com>, linux-pm@...r.kernel.org,
        devicetree@...r.kernel.org, linux-kernel@...r.kernel.org,
        Brian Norris <briannorris@...omium.org>,
        Douglas Anderson <dianders@...omium.org>,
        Enric Balletbo i Serra <enric.balletbo@...labora.com>,
        "Rafael J . Wysocki" <rjw@...ysocki.net>,
        Viresh Kumar <viresh.kumar@...aro.org>,
        Lee Jones <lee.jones@...aro.org>,
        Benson Leung <bleung@...omium.org>,
        Olof Johansson <olof@...om.net>
Subject: Re: [PATCH v4 09/12] dt-bindings: PM / OPP: add opp-throttlers
 property

On Wed, Jun 20, 2018 at 06:52:34PM -0700, Matthias Kaehlcke wrote:
> The optional opp-throttlers property is used to configure the throttlers
> (see drivers/misc/throttler/*) that use a given OPP to throttle the
> corresponding device(s).
> 
> Signed-off-by: Matthias Kaehlcke <mka@...omium.org>
> Reviewed-by: Brian Norris <briannorris@...omium.org>
> ---
> Changes in v4:
> - added 'Reviewed-by: Brian Norris <briannorris@...omium.org>' tag
> 
> Changes in v3:
> - none
> 
> Changes in v2:
> - patch added to series
> ---
>  Documentation/devicetree/bindings/opp/opp.txt | 3 +++
>  1 file changed, 3 insertions(+)
> 
> diff --git a/Documentation/devicetree/bindings/opp/opp.txt b/Documentation/devicetree/bindings/opp/opp.txt
> index c396c4c0af92..747e79740c75 100644
> --- a/Documentation/devicetree/bindings/opp/opp.txt
> +++ b/Documentation/devicetree/bindings/opp/opp.txt
> @@ -170,6 +170,9 @@ Optional properties:
>    functioning of the current device at the current OPP (where this property is
>    present).
>  
> +- opp-throttlers: Array with phandles of throttlers that use this OPP to
> +  throttle the corresponding device(s).
> +

I think it would be better to make this a boolean for each OPP entry and 
then add "operating-points-v2" property to the EC node to point to the 
OPP table. Unless there is some need for a different throttler for each 
OPP entry?

Rob