linux-kernel - Re: [PATCH 0/7] Implement generic regulator constraints parsing for ACPI and OF

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Message-ID: <20170125222533.l6sgeqoi7fmpzgne@sirena.org.uk>
Date:   Wed, 25 Jan 2017 22:25:33 +0000
From:   Mark Brown <broonie@...nel.org>
To:     Dmitry Torokhov <dmitry.torokhov@...il.com>
Cc:     Mark Rutland <mark.rutland@....com>,
        Furquan Shaikh <furquan@...omium.org>,
        "Rafael J. Wysocki" <rafael@...nel.org>,
        "Rafael J . Wysocki" <rjw@...ysocki.net>,
        Liam Girdwood <lgirdwood@...il.com>,
        Tony Lindgren <tony@...mide.com>, Len Brown <lenb@...nel.org>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        Lorenzo Pieralisi <lorenzo.pieralisi@....com>,
        Hanjun Guo <hanjun.guo@...aro.org>,
        Will Deacon <will.deacon@....com>,
        Rob Herring <robh@...nel.org>,
        Sathyanarayana Nujella <sathyanarayana.nujella@...el.com>,
        Heikki Krogerus <heikki.krogerus@...ux.intel.com>,
        Adam Thomson <Adam.Thomson.Opensource@...semi.com>,
        Linus Walleij <linus.walleij@...aro.org>,
        Alexandre Courbot <gnurou@...il.com>,
        linux-gpio@...r.kernel.org,
        ACPI Devel Maling List <linux-acpi@...r.kernel.org>,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
        Linux OMAP Mailing List <linux-omap@...r.kernel.org>,
        Aaron Durbin <adurbin@...omium.org>, dlaurie@...omium.org
Subject: Re: [PATCH 0/7] Implement generic regulator constraints parsing for
 ACPI and OF

On Wed, Jan 25, 2017 at 02:05:58PM -0800, Dmitry Torokhov wrote:

> > Yes.  Querying the suspend mode configuration would be one way to do it
> > already.

> Suspend mode of what though? Regulator? I would not mind cleaning up at
> least some of the drivers if we had a generic API for doing such
> query... Would it be something like:

Yes, though there's some fun working out exactly when to query them.
Early resume should be safe.

> 	bool device_has_lost_state(struct device *dev,
> 				   struct regulator *supplies)

> with DT systems going strictly off regulator data and ACPI throwing
> its internal state in the mix?

> Or you meant something else?

I meant looking at individual regulators, though I guess that does have
a list of supplied as an argument.

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