linux-kernel - Re: [RFC PATCH v2 4/4] ARM: sun8i: h3: add support for the thermal sensor in H3

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Message-ID: <20170403064208.llk6usgtkbg5ejzw@lukather>
Date:   Mon, 3 Apr 2017 08:42:08 +0200
From:   Maxime Ripard <maxime.ripard@...e-electrons.com>
To:     Quentin Schulz <quentin.schulz@...e-electrons.com>
Cc:     icenowy@...c.io, Lee Jones <lee.jones@...aro.org>,
        Chen-Yu Tsai <wens@...e.org>,
        Jonathan Cameron <jic23@...nel.org>,
        Zhang Rui <rui.zhang@...el.com>, devicetree@...r.kernel.org,
        linux-pm@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
        linux-kernel@...r.kernel.org, linux-iio@...r.kernel.org,
        linux-sunxi@...glegroups.com
Subject: Re: [RFC PATCH v2 4/4] ARM: sun8i: h3: add support for the thermal
 sensor in H3

On Sun, Apr 02, 2017 at 04:34:55PM +0200, Quentin Schulz wrote:
> Hi Icenowy,
> 
> On 02/04/2017 15:33, Icenowy Zheng wrote:
> > As we have gained the support for the thermal sensor in H3, we can now
> > add its device nodes to the device tree.
> > 
> > Add them to the H3 device tree.
> > 
> > The H5 thermal sensor has some differences, and will be added furtherly.
> > 
> > Signed-off-by: Icenowy Zheng <icenowy@...c.io>
> > ---
> >  arch/arm/boot/dts/sun8i-h3.dtsi | 26 ++++++++++++++++++++++++++
> >  1 file changed, 26 insertions(+)
> > 
> > diff --git a/arch/arm/boot/dts/sun8i-h3.dtsi b/arch/arm/boot/dts/sun8i-h3.dtsi
> > index b36f9f423c39..552217bb9266 100644
> > --- a/arch/arm/boot/dts/sun8i-h3.dtsi
> > +++ b/arch/arm/boot/dts/sun8i-h3.dtsi
> > @@ -72,6 +72,32 @@
> >  		};
> >  	};
> >  
> > +	iio-hwmon {
> > +		compatible = "iio-hwmon";
> > +		io-channels = <&ths>;
> > +	};
> > +
> > +	soc {
> > +		ths: ths@...25000 {
> > +			compatible = "allwinner,sun8i-h3-ths";
> > +			reg = <0x01c25000 0x100>;
> > +			clocks = <&ccu CLK_BUS_THS>, <&ccu CLK_THS>;
> > +			clock-names = "bus", "ths";
> > +			resets = <&ccu RST_BUS_THS>;
> > +			#thermal-sensor-cells = <0>;
> > +			#io-channel-cells = <0>;
> > +		};
> > +	};
> > +
> > +	thermal-zones {
> > +		cpu_thermal {
> > +			/* milliseconds */
> > +			polling-delay-passive = <250>;
> > +			polling-delay = <1000>;
> > +			thermal-sensors = <&ths>;
> > +		};
> 
> Would it make sense to add the CPU temp trip points in this patch?

No.

This is a separate, unrelated, change that has nothing to do with what
is described either in the commit title or the commit log.

The thermal zone itself shouldn't even be in this patch.

Maxime

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

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