linux-kernel - Re: [PATCH 3/3] ARM: tegra: Pass multiple versions in opp-supported-hw property

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Message-ID: <20200831084111.6udzvrdonxgzju4l@vireshk-i7>
Date:   Mon, 31 Aug 2020 14:11:11 +0530
From:   Viresh Kumar <viresh.kumar@...aro.org>
To:     Dmitry Osipenko <digetx@...il.com>
Cc:     Rob Herring <robh+dt@...nel.org>,
        Thierry Reding <thierry.reding@...il.com>,
        Jonathan Hunter <jonathanh@...dia.com>,
        linux-pm@...r.kernel.org,
        Vincent Guittot <vincent.guittot@...aro.org>,
        Rafael Wysocki <rjw@...ysocki.net>,
        Stephen Boyd <sboyd@...nel.org>, Nishanth Menon <nm@...com>,
        Stephan Gerhold <stephan@...hold.net>,
        devicetree@...r.kernel.org, linux-tegra@...r.kernel.org,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH 3/3] ARM: tegra: Pass multiple versions in
 opp-supported-hw property

On 31-08-20, 10:54, Dmitry Osipenko wrote:
> 31.08.2020 07:39, Viresh Kumar пишет:
> ...
> >>> Dmitry, I think there is further scope of simplifying stuff here by
> >>> using the opp-microvolt-<name> property and corresponding
> >>> dev_pm_opp_set_prop_name() call.
> > 
> > Any inputs on this Dmitry ?
> 
> Could you please give an example?

There are many users of it in the kernel. grep for "opp-microvolt-" in
the DT files and you will see.

The use of this property is to specific multiple microvolt properties
to the same frequency without a need to create separate nodes for them
all. The right microvolt property will be selected based on the call
made to dev_pm_opp_set_prop_name(), search for that too in kernel.

-- 
viresh