linux-kernel - Re: [PATCH v2 14/16] arm64: dts: mt7622: add thermal and related nodes

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Message-ID: <1518148312.9025.17.camel@mtkswgap22>
Date:   Fri, 9 Feb 2018 11:51:52 +0800
From:   Sean Wang <sean.wang@...iatek.com>
To:     Matthias Brugger <matthias.bgg@...il.com>
CC:     <robh+dt@...nel.org>, <mark.rutland@....com>,
        <devicetree@...r.kernel.org>, <linux-mediatek@...ts.infradead.org>,
        <linux-arm-kernel@...ts.infradead.org>,
        <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH v2 14/16] arm64: dts: mt7622: add thermal and related
 nodes

On Wed, 2018-02-07 at 12:43 +0100, Matthias Brugger wrote:
> 
> On 02/06/2018 10:53 AM, sean.wang@...iatek.com wrote:
> > From: Sean Wang <sean.wang@...iatek.com>
> > 
> > add nodes for the thermal controller and associated thermal zone using
> > CPU as the cooling device for each trip point. In addition, add a fixup
> > for thermal_calibration on nvmem should be 12 bytes as the minimal
> > requirement.
> > 
> > Signed-off-by: Sean Wang <sean.wang@...iatek.com>
> > ---
> >  arch/arm64/boot/dts/mediatek/mt7622.dtsi | 72 +++++++++++++++++++++++++++++++-
> >  1 file changed, 71 insertions(+), 1 deletion(-)
> > 
> > diff --git a/arch/arm64/boot/dts/mediatek/mt7622.dtsi b/arch/arm64/boot/dts/mediatek/mt7622.dtsi
> > index e6dd4f6..6cf67dd 100644
> > --- a/arch/arm64/boot/dts/mediatek/mt7622.dtsi
> > +++ b/arch/arm64/boot/dts/mediatek/mt7622.dtsi
> > @@ -12,6 +12,7 @@
> >  #include <dt-bindings/phy/phy.h>
> >  #include <dt-bindings/power/mt7622-power.h>
> >  #include <dt-bindings/reset/mt7622-reset.h>
> > +#include <dt-bindings/thermal/thermal.h>
> >  
> >  / {
> >  	compatible = "mediatek,mt7622";
> > @@ -75,6 +76,7 @@
> >  				 <&apmixedsys CLK_APMIXED_MAIN_CORE_EN>;
> >  			clock-names = "cpu", "intermediate";
> >  			operating-points-v2 = <&cpu_opp_table>;
> > +			#cooling-cells = <2>;
> >  			enable-method = "psci";
> >  			clock-frequency = <1300000000>;
> >  		};
> > @@ -119,6 +121,58 @@
> >  		};
> >  	};
> >  
> > +	thermal-zones {
> > +		cpu_thermal: cpu-thermal {
> > +			polling-delay-passive = <1000>;
> > +			polling-delay = <1000>;
> > +
> > +			thermal-sensors = <&thermal 0>;
> > +
> > +			trips {
> > +				cpu_passive: cpu-passive {
> > +					temperature = <47000>;
> > +					hysteresis = <2000>;
> > +					type = "passive";
> > +				};
> > +
> > +				cpu_active: cpu-active {
> > +					temperature = <67000>;
> > +					hysteresis = <2000>;
> > +					type = "active";
> > +				};
> > +
> > +				cpu_hot: cpu-hot {
> > +					temperature = <87000>;
> > +					hysteresis = <2000>;
> > +					type = "hot";
> > +				};
> > +
> > +				cpu-crit {
> > +					temperature = <107000>;
> > +					hysteresis = <2000>;
> > +					type = "critical";
> > +				};
> > +			};
> > +
> > +			cooling-maps {
> > +				map0 {
> > +					trip = <&cpu_passive>;
> > +					cooling-device = <&cpu0 THERMAL_NO_LIMIT THERMAL_NO_LIMIT>;
> > +				};
> > +
> > +				map1 {
> > +					trip = <&cpu_active>;
> > +					cooling-device = <&cpu0 THERMAL_NO_LIMIT THERMAL_NO_LIMIT>;
> > +				};
> > +
> > +				map2 {
> > +					trip = <&cpu_hot>;
> > +					cooling-device = <&cpu0 THERMAL_NO_LIMIT THERMAL_NO_LIMIT>;
> > +				};
> > +			};
> > +		};
> > +	};
> > +
> >  	timer {
> >  		compatible = "arm,armv8-timer";
> >  		interrupt-parent = <&gic>;
> > @@ -201,7 +255,7 @@
> >  		#size-cells = <1>;
> >  
> >  		thermal_calibration: calib@198 {
> > -			reg = <0x198 0x8>;
> > +			reg = <0x198 0xc>;
> 
> Any reason why this is not part of patch 8/16?
> 

There's no strong reason wanting me to do that. patch 8 has contained a
lot of nodes and patch 16 is present just in v2. So, I felt it should be
a little bit easy that people reviews those patches if they are put into
separate patches. But, It's still fine to make them into one in the next
version.

> Regards,
> Matthias
>