RE: [PATCH 1/2] arm64:dt:ls1046a: Add TMU device tree support for LS1046A

[Troy Jia]

Add Yuantian who is the owner of this patch set since next week.

> -----Original Message-----
> From: Shawn Guo [mailto:shawnguo@xxxxxxxxxx]
> Sent: Monday, January 02, 2017 2:25 PM
> To: Troy Jia <hongtao.jia@xxxxxxx>
> Cc: rui.zhang@xxxxxxxxx; edubezval@xxxxxxxxx; robh+dt@xxxxxxxxxx; Scott Wood
> <scott.wood@xxxxxxx>; devicetree@xxxxxxxxxxxxxxx; linux-
> kernel@xxxxxxxxxxxxxxx; linux-arm-kernel@xxxxxxxxxxxxxxxxxxx
> Subject: Re: [PATCH 1/2] arm64:dt:ls1046a: Add TMU device tree support for
> LS1046A
> 
> On Thu, Dec 08, 2016 at 11:28:25AM +0800, Jia Hongtao wrote:
> > Also add nodes and properties for thermal management support.
> >
> > Signed-off-by: Jia Hongtao <hongtao.jia@xxxxxxx>
> 
> "arm64: dts: ls1046a: ..." for subject prefix please.  Also, since we have ls1046a in
> prefix, the 'for LS1046A' is not needed.

Thanks. I will fix it.

> 
> > ---
> >  arch/arm64/boot/dts/freescale/fsl-ls1046a.dtsi | 79
> > ++++++++++++++++++++++++++
> >  1 file changed, 79 insertions(+)
> >
> > diff --git a/arch/arm64/boot/dts/freescale/fsl-ls1046a.dtsi
> > b/arch/arm64/boot/dts/freescale/fsl-ls1046a.dtsi
> > index 38806ca..40604e9 100644
> > --- a/arch/arm64/boot/dts/freescale/fsl-ls1046a.dtsi
> > +++ b/arch/arm64/boot/dts/freescale/fsl-ls1046a.dtsi
> > @@ -45,6 +45,8 @@
> >   */
> >
> >  #include <dt-bindings/interrupt-controller/arm-gic.h>
> > +#include <dt-bindings/thermal/thermal.h>
> > +
> 
> Unneeded newline.

Got it.

> 
> >
> >  / {
> >  	compatible = "fsl,ls1046a";
> > @@ -67,6 +69,7 @@
> >  			clocks = <&clockgen 1 0>;
> >  			next-level-cache = <&l2>;
> >  			cpu-idle-states = <&CPU_PH20>;
> > +			#cooling-cells = <2>;
> >  		};
> >
> >  		cpu1: cpu@1 {
> > @@ -279,6 +282,82 @@
> >  			clocks = <&sysclk>;
> >  		};
> >
> > +		tmu: tmu@1f00000 {
> > +			compatible = "fsl,qoriq-tmu";
> > +			reg = <0x0 0x1f00000 0x0 0x10000>;
> > +			interrupts = <0 33 0x4>;
> > +			fsl,tmu-range = <0xb0000 0x9002a 0x6004c 0x30062>;
> > +			fsl,tmu-calibration = <0x00000000 0x00000026
> > +					       0x00000001 0x0000002d
> > +					       0x00000002 0x00000032
> > +					       0x00000003 0x00000039
> > +					       0x00000004 0x0000003f
> > +					       0x00000005 0x00000046
> > +					       0x00000006 0x0000004d
> > +					       0x00000007 0x00000054
> > +					       0x00000008 0x0000005a
> > +					       0x00000009 0x00000061
> > +					       0x0000000a 0x0000006a
> > +					       0x0000000b 0x00000071
> > +
> 
> Instead of a newline, can we have a single line comment here to tell how these
> calibration data is grouped?

Each group represent one temperature range. It's a good idea to add comment here.
Could I just add one comment like below to clarify all four groups?
/* Each calibration data group represent one temperature range. There are four ranges in total */

> 
> > +					       0x00010000 0x00000025
> > +					       0x00010001 0x0000002c
> > +					       0x00010002 0x00000035
> > +					       0x00010003 0x0000003d
> > +					       0x00010004 0x00000045
> > +					       0x00010005 0x0000004e
> > +					       0x00010006 0x00000057
> > +					       0x00010007 0x00000061
> > +					       0x00010008 0x0000006b
> > +					       0x00010009 0x00000076
> > +
> > +					       0x00020000 0x00000029
> > +					       0x00020001 0x00000033
> > +					       0x00020002 0x0000003d
> > +					       0x00020003 0x00000049
> > +					       0x00020004 0x00000056
> > +					       0x00020005 0x00000061
> > +					       0x00020006 0x0000006d
> > +
> > +					       0x00030000 0x00000021
> > +					       0x00030001 0x0000002a
> > +					       0x00030002 0x0000003c
> > +					       0x00030003 0x0000004e>;
> > +			big-endian;
> > +			#thermal-sensor-cells = <1>;
> > +		};
> > +
> > +		thermal-zones {
> > +			cpu_thermal: cpu-thermal {
> > +				polling-delay-passive = <1000>;
> > +				polling-delay = <5000>;
> > +
> 
> We usually do not have newline between properties but nodes, or between
> property list and child node.

I just follow the style of thermal binding of
Documentation/devicetree/bindings/thermal/thermal.txt.

> 
> > +				thermal-sensors = <&tmu 3>;
> > +
> > +				trips {
> > +					cpu_alert: cpu-alert {
> > +						temperature = <85000>;
> > +						hysteresis = <2000>;
> > +						type = "passive";
> > +					};
> 
> Have a newline here.

Also follow the thermal binding.

-Hongtao.

> 
> > +					cpu_crit: cpu-crit {
> > +						temperature = <95000>;
> > +						hysteresis = <2000>;
> > +						type = "critical";
> > +					};
> > +				};
> > +
> > +				cooling-maps {
> > +					map0 {
> > +						trip = <&cpu_alert>;
> > +						cooling-device =
> > +							<&cpu0
> THERMAL_NO_LIMIT
> > +							THERMAL_NO_LIMIT>;
> > +					};
> > +				};
> > +			};
> > +		};
> > +
> >  		dspi: dspi@2100000 {
> >  			compatible = "fsl,ls1021a-v1.0-dspi";
> >  			#address-cells = <1>;
> > --
> > 2.1.0.27.g96db324
> >
> >
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