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

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Message-ID: <20170125204053.st2ce7wfjttnk65k@sirena.org.uk>
Date:   Wed, 25 Jan 2017 20:40:53 +0000
From:   Mark Brown <broonie@...nel.org>
To:     Lorenzo Pieralisi <lorenzo.pieralisi@....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>,
        Dmitry Torokhov <dmitry.torokhov@...il.com>,
        Len Brown <lenb@...nel.org>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        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 07:21:35PM +0000, Lorenzo Pieralisi wrote:
> On Wed, Jan 25, 2017 at 06:29:55PM +0000, Mark Brown wrote:

> > I think there's a reasonable chance that any ACPI specs could be written
> > in such a way as to allow transparent support in Linux, the main thing
> > I'd worry about is naming issues.

> I think that the difference between ACPI and DT firmware models,
> in particular in relation to power states handling (and what piece
> of SW is in charge of power management) is significant and goes beyond
> naming conventions, therefore the code (and reasoning behind it - ie
> to have an identical driver interface to a completely different FW
> model) in this series is just not acceptable, that's a plain shortcut.

> We will see how this should be implemented in ACPI, not with this
> code (and FW bindings).

Oh, absolutely - what I'm saying is that once that's done I'd expect
implementing it to be almost entirely a regulator core change in the
same way that implementing DT support was.

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