RE: [PATCH V4 4/4] ARM64: dts: imx: add i.MX8QXP thermal support

[Anson Huang <anson.huang@nxp.com>]

Hi, Eduardo

Best Regards!
Anson Huang

> -----Original Message-----
> From: Eduardo Valentin [mailto:edubezval@gmail.com]
> Sent: 2018年11月30日 0:51
> To: Anson Huang <anson.huang@nxp.com>
> Cc: rui.zhang@intel.com; daniel.lezcano@linaro.org; robh+dt@kernel.org;
> mark.rutland@arm.com; catalin.marinas@arm.com; will.deacon@arm.com;
> Aisheng DONG <aisheng.dong@nxp.com>; Andy Gross
> <andy.gross@linaro.org>; heiko@sntech.de; horms+renesas@verge.net.au;
> arnd@arndb.de; amit.kucheria@linaro.org; enric.balletbo@collabora.com;
> ezequiel@collabora.com; olof@lixom.net; bjorn.andersson@linaro.org;
> shawnguo@kernel.org; LW@KARO-electronics.de; linux-pm@vger.kernel.org;
> devicetree@vger.kernel.org; linux-kernel@vger.kernel.org;
> linux-arm-kernel@lists.infradead.org; dl-linux-imx <linux-imx@nxp.com>
> Subject: Re: [PATCH V4 4/4] ARM64: dts: imx: add i.MX8QXP thermal support
> 
> On Thu, Nov 29, 2018 at 02:37:47AM +0000, Anson Huang wrote:
> > Add i.MX8QXP CPU thermal zone support.
> >
> > Signed-off-by: Anson Huang <Anson.Huang@nxp.com>
> > ---
> > ChangeLog:
> > V3->V4:
> >   *move the tsens node to inside of SCU node as it is belonging to SCU.
> > ---
> >  arch/arm64/boot/dts/freescale/imx8qxp.dtsi | 27
> > +++++++++++++++++++++++++++
> >  1 file changed, 27 insertions(+)
> >
> > diff --git a/arch/arm64/boot/dts/freescale/imx8qxp.dtsi
> > b/arch/arm64/boot/dts/freescale/imx8qxp.dtsi
> > index 9b08688..48f622c 100644
> > --- a/arch/arm64/boot/dts/freescale/imx8qxp.dtsi
> > +++ b/arch/arm64/boot/dts/freescale/imx8qxp.dtsi
> > @@ -9,6 +9,7 @@
> >  #include <dt-bindings/firmware/imx/rsrc.h>  #include
> > <dt-bindings/gpio/gpio.h>  #include
> > <dt-bindings/pinctrl/pads-imx8qxp.h>
> > +#include <dt-bindings/thermal/thermal.h>
> >
> >  #include "imx8-ca35.dtsi"
> >
> > @@ -87,6 +88,12 @@
> >  		rtc: rtc {
> >  			compatible = "fsl,imx8qxp-sc-rtc";
> >  		};
> > +
> > +		tsens: thermal-sensor {
> > +			compatible = "fsl,imx8qxp-sc-thermal";
> > +			tsens-num = <1>;
> > +			#thermal-sensor-cells = <1>;
> > +		};
> >  	};
> >
> >  	adma_subsys: bus@59000000 {
> > @@ -410,4 +417,24 @@
> >  		#size-cells = <1>;
> >  		ranges = <0x5f000000 0x0 0x5f000000 0x1000000>;
> >  	};
> > +
> > +	thermal_zones: thermal-zones {
> > +		cpu-thermal0 {
> > +			polling-delay-passive = <250>;
> > +			polling-delay = <2000>;
> > +			thermal-sensors = <&tsens 355>;
> > +			trips {
> > +				cpu_alert0: trip0 {
> > +					temperature = <107000>;
> > +					hysteresis = <2000>;
> > +					type = "passive";
> 
> Passive, but yet no cooling maps?

The cpu-freq driver for i.MX8QXP is NOT ready yet, and NOT
sure when it will be ready, so I can NOT test the cooling function now,
that is why I did NOT add the cooling maps, plan to add the CPU cooling
map after cpu-freq is ready.

Anson.

> 
> > +				};
> > +				cpu_crit0: trip1 {
> > +					temperature = <127000>;
> > +					hysteresis = <2000>;
> > +					type = "critical";
> > +				};
> > +			};
> > +		};
> > +	};
> >  };
> > --
> > 2.7.4
> >