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Re: [PATCH v2 07/13] dt-bindings: power: reset: Document ocelot-reset bi

To: Rob Herring <robh@kernel.org>
Subject: Re: [PATCH v2 07/13] dt-bindings: power: reset: Document ocelot-reset binding
From: Alexandre Belloni <alexandre.belloni@free-electrons.com>
Date: Fri, 15 Dec 2017 23:07:41 +0100
Cc: Ralf Baechle <ralf@linux-mips.org>, linux-mips@linux-mips.org, linux-kernel@vger.kernel.org, devicetree@vger.kernel.org, Sebastian Reichel <sre@kernel.org>, linux-pm@vger.kernel.org
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References: <20171208154618.20105-1-alexandre.belloni@free-electrons.com> <20171208154618.20105-8-alexandre.belloni@free-electrons.com> <20171215202332.bn47da3fpkynusno@rob-hp-laptop>
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On 15/12/2017 at 14:23:32 -0600, Rob Herring wrote:
> On Fri, Dec 08, 2017 at 04:46:12PM +0100, Alexandre Belloni wrote:
> > Add binding documentation for the Microsemi Ocelot reset block.
> > 
> > Cc: Rob Herring <robh+dt@kernel.org>
> > Cc: devicetree@vger.kernel.org
> > Cc: Sebastian Reichel <sre@kernel.org>
> > Cc: linux-pm@vger.kernel.org
> > Signed-off-by: Alexandre Belloni <alexandre.belloni@free-electrons.com>
> > ---
> >  .../devicetree/bindings/power/reset/ocelot-reset.txt    | 17 
> > +++++++++++++++++
> >  1 file changed, 17 insertions(+)
> >  create mode 100644 
> > Documentation/devicetree/bindings/power/reset/ocelot-reset.txt
> > 
> > diff --git a/Documentation/devicetree/bindings/power/reset/ocelot-reset.txt 
> > b/Documentation/devicetree/bindings/power/reset/ocelot-reset.txt
> > new file mode 100644
> > index 000000000000..1bcf276b04cb
> > --- /dev/null
> > +++ b/Documentation/devicetree/bindings/power/reset/ocelot-reset.txt
> > @@ -0,0 +1,17 @@
> > +Microsemi Ocelot reset controller
> > +
> > +The DEVCPU_GCB:CHIP_REGS have a SOFT_RST register that can be used to 
> > reset the
> > +SoC MIPS core.
> > +
> > +Required Properties:
> > + - compatible: "mscc,ocelot-chip-reset"
> > +
> > +Example:
> > +   syscon@71070000 {
> > +           compatible = "mscc,ocelot-chip-regs", "simple-mfd", "syscon";
> > +           reg = <0x71070000 0x1c>;
> > +
> > +           reset {
> > +                   compatible = "mscc,ocelot-chip-reset";
> 
> Why do you need a subnode here other than as a way to instantiate a 
> driver? Can you describe the SOFT_RST register in reg property here 
> (without having overlapping regions)?

You mean like:

reset@7107001c {
        compatible = "mscc,ocelot-chip-reset";
        reg = <0x7107001c 0x4>;
};

I guess that could work.

-- 
Alexandre Belloni, Free Electrons
Embedded Linux and Kernel engineering
http://free-electrons.com

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