linux-kernel - Re: [PATCH 1/3] Documentation: dtb: xgene: Add hwmon dts binding documentation

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Message-ID: <CAFHUOYyYt8pE6sggezCR=TFcsimcjakbYmcWFtpLyQ3Et_gZaA@mail.gmail.com>
Date:	Mon, 23 May 2016 18:01:14 -0700
From:	Hoan Tran <hotran@....com>
To:	Rob Herring <robh@...nel.org>
Cc:	Jean Delvare <jdelvare@...e.com>,
	Guenter Roeck <linux@...ck-us.net>,
	Jonathan Corbet <corbet@....net>,
	Jassi Brar <jassisinghbrar@...il.com>,
	Ashwin Chaugule <ashwin.chaugule@...aro.org>,
	Duc Dang <dhdang@....com>, Loc Ho <lho@....com>,
	linux-hwmon@...r.kernel.org, linux-doc@...r.kernel.org,
	lkml <linux-kernel@...r.kernel.org>,
	linux-arm-kernel@...ts.infradead.org, devicetree@...r.kernel.org
Subject: Re: [PATCH 1/3] Documentation: dtb: xgene: Add hwmon dts binding documentation

Hi Rob,

Thanks for your review !

On Mon, May 23, 2016 at 1:30 PM, Rob Herring <robh@...nel.org> wrote:
>
> On Mon, May 16, 2016 at 09:17:25AM -0700, Hoan Tran wrote:
> > This patch adds the APM X-Gene hwmon device tree node documentation.
> >
> > Signed-off-by: Hoan Tran <hotran@....com>
> > ---
> >  .../devicetree/bindings/hwmon/apm-xgene-hwmon.txt          | 14 ++++++++++++++
> >  1 file changed, 14 insertions(+)
> >  create mode 100644 Documentation/devicetree/bindings/hwmon/apm-xgene-hwmon.txt
> >
> > diff --git a/Documentation/devicetree/bindings/hwmon/apm-xgene-hwmon.txt b/Documentation/devicetree/bindings/hwmon/apm-xgene-hwmon.txt
> > new file mode 100644
> > index 0000000..49a482e
> > --- /dev/null
> > +++ b/Documentation/devicetree/bindings/hwmon/apm-xgene-hwmon.txt
> > @@ -0,0 +1,14 @@
> > +APM X-Gene hwmon driver
> > +
> > +Hwmon driver accesses sensors over the "SLIMpro" mailbox.
>
> DT bindings describe h/w, not driver data.
How about this description: "APM X-Gene SOC sensors are accessed over
the "SLIMpro" mailbox" ?
> I'm not sure this belongs in
> DT and perhaps the devices for the mailbox should be created by the
> mailbox driver.
I don't think the current mailbox supports it.
>
> > +
> > +Required properties :
> > + - compatible : should be "apm,xgene-slimpro-hwmon"
> > + - mboxes : use the label reference for the mailbox as the first parameter.
> > +         The second parameter is the channel number.
>
> When do you expect this to be different mailbox numbers?
No, this number is not changed. This "mboxes" property is used and
required by mailbox.c when hwmon driver requests a mailbox channel

Thanks and Regards
Hoan
>
>
> > +
> > +Example :
> > +     hwmonslimpro {
> > +             compatible = "apm,xgene-slimpro-hwmon";
> > +             mboxes = <&mailbox 7>;
> > +     };
> > --
> > 1.9.1
> >