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From:   Andy Tang <andy.tang@nxp.com>
To:     Shawn Guo <shawnguo@kernel.org>
CC:     Leo Li <leoyang.li@nxp.com>,
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Subject: RE: [EXT] Re: [PATCH v6] arm64: dts: ls1088a: add one more thermal
 zone node
Thread-Topic: [EXT] Re: [PATCH v6] arm64: dts: ls1088a: add one more thermal
 zone node
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From: Viresh Kumar <viresh.kumar@linaro.org>
To: Andy Tang <andy.tang@nxp.com>
Subject: [EXT] Re: Ask for help about cooling device map
Thread-Topic: [EXT] Re: Ask for help about cooling device map
Thread-Index: AdT4u6shVhjIu6UxTEaSdrTYxYKoAQAJ5W6A
Date: Mon, 22 Apr 2019 08:13:23 +0000
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On 22-04-19, 07:09, Andy Tang wrote:
> Hi Viresh,
>
> Sorry to bother you. I have a question, hope I can get you help.
> Here it is:
>
> I want to add multiple "Thermal Zone" support in dts ( driver is ready).
> The final dts looks like below:
>
>         thermal-zones {
>                 cpu_thermal: cpu-thermal {
>                         polling-delay-passive =3D <1000>;
>                         polling-delay =3D <5000>;
>                         thermal-sensors =3D <&tmu 0>;
>
>                         trips {
>                                 ccu_alert: ccu-alert {
>                                         temperature =3D <85000>;
>                                         hysteresis =3D <2000>;
>                                         type =3D "passive";
>                                 };
>                                 ccu_crit: ccu-crit {
>                                         temperature =3D <95000>;
>                                         hysteresis =3D <2000>;
>                                         type =3D "critical";
>                         cooling-maps {
>                                 map0 {
>                                         trip =3D <&ccu_alert>;
>                                         cooling-device =3D
>                                                 <&cpu0 THERMAL_NO_LIMIT T=
HERMAL_NO_LIMIT>,
>                                                 <&cpu1 THERMAL_NO_LIMIT T=
HERMAL_NO_LIMIT>,
>                                                 <&cpu2 THERMAL_NO_LIMIT T=
HERMAL_NO_LIMIT>,
>                                                 <&cpu3 THERMAL_NO_LIMIT T=
HERMAL_NO_LIMIT>,
>                                                 <&cpu4 THERMAL_NO_LIMIT T=
HERMAL_NO_LIMIT>,
>                                                 <&cpu5 THERMAL_NO_LIMIT T=
HERMAL_NO_LIMIT>,
>                                                 <&cpu6 THERMAL_NO_LIMIT T=
HERMAL_NO_LIMIT>,
>                                                 <&cpu7 THERMAL_NO_LIMIT T=
HERMAL_NO_LIMIT>;
>                                 };
>                         };
>                 };
>                 platform {
>                         polling-delay-passive =3D <1000>;
>                         polling-delay =3D <5000>;
>                         thermal-sensors =3D <&tmu 1>;
>                         trips {
>                                 plt_alert: plt-alert {
>                                         temperature =3D <85000>;
>                                         hysteresis =3D <2000>;
>                                         type =3D "passive";
>                         };
>                                 plt_crit: plt-crit {
>                                         temperature =3D <95000>;
>                                         hysteresis =3D <2000>;
>                                         type =3D "critical";
>                                 };
>                         };
>                         cooling-maps {
>                                 map0 {
>                                         trip =3D <&plt_alert>;
>                                         cooling-device =3D
>                                                 <&cpu0 THERMAL_NO_LIMIT T=
HERMAL_NO_LIMIT>,
>                                                 <&cpu1 THERMAL_NO_LIMIT T=
HERMAL_NO_LIMIT>,
>                                                 <&cpu2 THERMAL_NO_LIMIT T=
HERMAL_NO_LIMIT>,
>                                                 <&cpu3 THERMAL_NO_LIMIT T=
HERMAL_NO_LIMIT>,
>                                                 <&cpu4 THERMAL_NO_LIMIT T=
HERMAL_NO_LIMIT>,
>                                                 <&cpu5 THERMAL_NO_LIMIT T=
HERMAL_NO_LIMIT>,
>                                                 <&cpu6 THERMAL_NO_LIMIT T=
HERMAL_NO_LIMIT>,
>                                                 <&cpu7 THERMAL_NO_LIMIT T=
HERMAL_NO_LIMIT>;
>                         }
> }
>
> Here we have 2 thermal zones, but both map cpu0-7 as cooling device.  I h=
ave tested and didn't find any issues.
> My query is: is it allowed to map same device as "cooling device" to more=
 than one "thermal zone"?

That should be fine IMO.

--
viresh

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