linux-kernel - RE: [PATCH v4] arm64: dts: ls1088a: add one more thermal zone node

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Date:   Thu, 11 Apr 2019 08:01:55 +0000
From:   Andy Tang <andy.tang@....com>
To:     Daniel Lezcano <daniel.lezcano@...aro.org>,
        "shawnguo@...nel.org" <shawnguo@...nel.org>
CC:     Leo Li <leoyang.li@....com>,
        "robh+dt@...nel.org" <robh+dt@...nel.org>,
        "mark.rutland@....com" <mark.rutland@....com>,
        "linux-arm-kernel@...ts.infradead.org" 
        <linux-arm-kernel@...ts.infradead.org>,
        "devicetree@...r.kernel.org" <devicetree@...r.kernel.org>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        "linux-pm@...r.kernel.org" <linux-pm@...r.kernel.org>,
        "rui.zhang@...el.com" <rui.zhang@...el.com>,
        "edubezval@...il.com" <edubezval@...il.com>
Subject: RE: [PATCH v4] arm64: dts: ls1088a: add one more thermal zone node

Hi Daniel,


> -----Original Message-----
> From: Daniel Lezcano <daniel.lezcano@...aro.org>
> Sent: 2019年4月4日 10:35
> To: Andy Tang <andy.tang@....com>; shawnguo@...nel.org
> Cc: Leo Li <leoyang.li@....com>; robh+dt@...nel.org; mark.rutland@....com;
> linux-arm-kernel@...ts.infradead.org; devicetree@...r.kernel.org;
> linux-kernel@...r.kernel.org; linux-pm@...r.kernel.org; rui.zhang@...el.com;
> edubezval@...il.com
> Subject: Re: [PATCH v4] arm64: dts: ls1088a: add one more thermal zone node
> > +						<&cpu1 THERMAL_NO_LIMIT
> THERMAL_NO_LIMIT>,
> > +						<&cpu2 THERMAL_NO_LIMIT
> THERMAL_NO_LIMIT>,
> > +						<&cpu3 THERMAL_NO_LIMIT
> THERMAL_NO_LIMIT>,
> > +						<&cpu4 THERMAL_NO_LIMIT
> THERMAL_NO_LIMIT>,
> > +						<&cpu5 THERMAL_NO_LIMIT
> THERMAL_NO_LIMIT>,
> > +						<&cpu6 THERMAL_NO_LIMIT
> THERMAL_NO_LIMIT>,
> > +						<&cpu7 THERMAL_NO_LIMIT
> THERMAL_NO_LIMIT>;
> > +				};
> 
> Does it make sense to assign the same cooling devices to two different thermal
> zones running different instances of governor ?
Even though I didn't find any error when test, I do think it is inappropriate.

BR,
Andy
> 
> > +			};
> > +		};
> > +
> > +		platform-thermal {
> > +			polling-delay-passive = <1000>;
> > +			polling-delay = <5000>;
> > +			thermal-sensors = <&tmu 1>;
> > +
> > +			trips {
> > +				platform_alert: platform-alert {
> > +					temperature = <85000>;
> > +					hysteresis = <2000>;
> > +					type = "passive";
> > +				};
> > +
> > +				platform_crit: platform-crit {
> > +					temperature = <95000>;
> > +					hysteresis = <2000>;
> > +					type = "critical";
> > +				};
> > +			};
> > +
> > +			cooling-maps {
> > +				map0 {
> > +					trip = <&platform_alert>;
> >  					cooling-device =
> >  						<&cpu0 THERMAL_NO_LIMIT
> THERMAL_NO_LIMIT>,
> >  						<&cpu1 THERMAL_NO_LIMIT
> THERMAL_NO_LIMIT>,
> >
> 
> 
> --
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