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

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Message-ID: <CAJZ5v0hHSadH1KLOGg029VU2qrY900ak0=NnH5HPBKZ=FpB7HQ@mail.gmail.com>
Date:   Wed, 25 Jan 2017 13:55:21 +0100
From:   "Rafael J. Wysocki" <rafael@...nel.org>
To:     Mark Brown <broonie@...nel.org>
Cc:     Furquan Shaikh <furquan@...omium.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>,
        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>,
        Mark Rutland <mark.rutland@....com>
Subject: Re: [PATCH 0/7] Implement generic regulator constraints parsing for
 ACPI and OF

On Wed, Jan 25, 2017 at 1:49 PM, Mark Brown <broonie@...nel.org> wrote:
> On Tue, Jan 24, 2017 at 04:06:34PM -0800, Furquan Shaikh wrote:
>
>> Since regulator properties remain the same across OF and ACPI
>> regulators, this series of patches provides common routine for
>> obtaining regulation constraints from device tree and ACPI nodes. In
>
> As Lorenzo explained this is really not a good idea, ACPI has a power
> management model which is just being ignored here.  If you're producing
> systems using ACPI you really need to use ACPI in a joined up fashion
> rather than just blindly importing all DT bindings into ACPI.  While
> there are many areas where ACPI just doesn't do anything and as a result
> it does make sense to reuse existing DT bindings there are also plenty
> of areas where work has been done on the ACPI side.  Regulators and
> power management are definitely one of those areas.

This is exactly right. :-)

Thanks,
Rafael