linux-kernel - Re: [PATCH 2/3] PM / OPP: Add {opp-microvolt|opp-microamp|turbo-mode|opp-suspend}-<name> binding

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Message-ID: <20151030215430.GK19782@codeaurora.org>
Date:	Fri, 30 Oct 2015 14:54:30 -0700
From:	Stephen Boyd <sboyd@...eaurora.org>
To:	Viresh Kumar <viresh.kumar@...aro.org>
Cc:	Rafael Wysocki <rjw@...ysocki.net>, robh+dt@...nel.org,
	lee.jones@...aro.org, linaro-kernel@...ts.linaro.org,
	linux-pm@...r.kernel.org, mark.rutland@....com, pawel.moll@....com,
	ijc+devicetree@...lion.org.uk, galak@...eaurora.org, nm@...com,
	devicetree@...r.kernel.org,
	open list <linux-kernel@...r.kernel.org>,
	"Rafael J. Wysocki" <rafael.j.wysocki@...el.com>
Subject: Re: [PATCH 2/3] PM / OPP: Add
 {opp-microvolt|opp-microamp|turbo-mode|opp-suspend}-<name> binding

On 10/30, Viresh Kumar wrote:
> Depending on the version of hardware or its properties, which are only
> known at runtime, various properties of the OPP can change. For example,
> an OPP with frequency 1.2 GHz, may have different voltage/current
> requirements based on the version of the hardware it is running on.
> Similarly, it may or may not be a turbo or suspend OPP on those
> circumstances.
> 
> In order to not replicate the same OPP tables for varying values of all
> such fields, this commit introduces the concept of opp-property-<name>.
> The <name> can be chosen by the platform at runtime, and OPPs will be
> initialized depending on that name string. Currently support is extended
> for the following properties:
> - opp-microvolt-<name>
> - opp-microamp-<name>
> - turbo-mode-<name>
> - opp-suspend-<name>
> 
> If the name string isn't provided by the platform, or if it is provided
> but doesn't match the properties present in the OPP node, we will fall
> back to the original properties without the -<name> string, if they are
> available.
> 
> Signed-off-by: Viresh Kumar <viresh.kumar@...aro.org>
> ---

Reviewed-by: Stephen Boyd <sboyd@...eaurora.org>

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