linux-kernel - Re: [PATCH 3/3] arm: dts: thermal: add thermal/auxadc node.

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Date:	Mon, 15 Aug 2016 15:14:28 +0800
From:	dawei chien <dawei.chien@...iatek.com>
To:	Matthias Brugger <matthias.bgg@...il.com>
CC:	Zhang Rui <rui.zhang@...el.com>,
	Eduardo Valentin <edubezval@...il.com>,
	Rob Herring <robh+dt@...nel.org>,
	Pawel Moll <pawel.moll@....com>,
	"Mark Rutland" <mark.rutland@....com>,
	Ian Campbell <ijc+devicetree@...lion.org.uk>,
	Kumar Gala <galak@...eaurora.org>,
	"Russell King" <linux@...linux.org.uk>, <linux-pm@...r.kernel.org>,
	<devicetree@...r.kernel.org>, <linux-kernel@...r.kernel.org>,
	<linux-arm-kernel@...ts.infradead.org>,
	<linux-mediatek@...ts.infradead.org>,
	<srv_heupstream@...iatek.com>,
	Sascha Hauer <kernel@...gutronix.de>,
	Fan Chen <fan.chen@...iatek.com>,
	Eddie Huang <eddie.huang@...iatek.com>,
	"Yingjoe Chen" <yingjoe.chen@...iatek.com>,
	Erin Lo <erin.lo@...iatek.com>
Subject: Re: [PATCH 3/3] arm: dts: thermal: add thermal/auxadc node.

Hi Matthias,

On Thu, 2016-08-11 at 17:51 +0200, Matthias Brugger wrote:
> 
> On 07/07/16 11:06, Dawei Chien wrote:
> > This adds the thermal controller and auxadc nodes
> > to the Mediatek MT2701 dtsi file.
> >
> > Signed-off-by: Dawei Chien <dawei.chien@...iatek.com>
> > ---
> > This patch depned on:
> > https://patchwork.kernel.org/patch/9213545/
> > ---
> >  arch/arm/boot/dts/mt2701.dtsi |   43 +++++++++++++++++++++++++++++++++++++++++
> >  1 file changed, 43 insertions(+)
> >
> > diff --git a/arch/arm/boot/dts/mt2701.dtsi b/arch/arm/boot/dts/mt2701.dtsi
> > index 2ac8b50..0834a23 100644
> > --- a/arch/arm/boot/dts/mt2701.dtsi
> > +++ b/arch/arm/boot/dts/mt2701.dtsi
> > @@ -77,6 +77,36 @@
> >  		#clock-cells = <0>;
> >  	};
> >
> > +	thermal-zones {
> > +		cpu_thermal: cpu_thermal {
> > +			polling-delay-passive = <1000>; /* milliseconds */
> > +			polling-delay = <1000>; /* milliseconds */
> > +
> > +			thermal-sensors = <&thermal 0>;
> > +			sustainable-power = <1000>;
> > +
> > +			trips {
> > +				threshold: trip-point@0 {
> > +					temperature = <68000>;
> > +					hysteresis = <2000>;
> > +					type = "passive";
> > +				};
> > +
> > +				target: trip-point@1 {
> > +					temperature = <85000>;
> > +					hysteresis = <2000>;
> > +					type = "passive";
> > +				};
> > +
> > +				cpu_crit: cpu_crit@0 {
> > +					temperature = <115000>;
> > +					hysteresis = <2000>;
> > +					type = "critical";
> > +				};
> > +			};
> > +		};
> > +	};
> > +
> >  	timer {
> >  		compatible = "arm,armv7-timer";
> >  		interrupt-parent = <&gic>;
> > @@ -183,4 +213,17 @@
> >  		clocks = <&uart_clk>;
> >  		status = "disabled";
> >  	};
> > +
> > +	thermal: thermal@...0b000 {
> > +		#thermal-sensor-cells = <0>;
> > +		compatible = "mediatek,mt2701-thermal";
> > +		reg = <0 0x1100b000 0 0x1000>;
> > +		interrupts = <GIC_SPI 70 IRQ_TYPE_LEVEL_LOW>;
> > +		clocks = <&pericfg CLK_PERI_THERM>, <&pericfg CLK_PERI_AUXADC>;
> > +		clock-names = "therm", "auxadc";
> > +		resets = <&pericfg 0x10>;
> > +		reset-names = "therm";
> > +		mediatek,auxadc = <&auxadc>;
> > +		mediatek,apmixedsys = <&apmixedsys>;
> > +	};
> >  };
> >
> 
> what about:
> status = "disabled"; ?

Since thermal driver would protect our platform by shutdown method once
SoC temperature over critical point, I prefer keep this rather than
disabling, how do you think, thank you.

BR,
Dawei