linux-kernel - Re: [PATCH] thermal/drivers/hisi: Remove confusing error message

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Message-ID: <12e90c78-d8dc-5184-17aa-281cd0ad5417@linaro.org>
Date:   Tue, 22 Aug 2017 10:25:07 +0200
From:   Daniel Lezcano <daniel.lezcano@...aro.org>
To:     Leo Yan <leo.yan@...aro.org>
Cc:     Zhang Rui <rui.zhang@...el.com>, edubezval@...il.com,
        "open list:THERMAL" <linux-pm@...r.kernel.org>,
        open list <linux-kernel@...r.kernel.org>,
        kong.kongxinwei@...ilicon.com
Subject: Re: [PATCH] thermal/drivers/hisi: Remove confusing error message

On 22/08/2017 10:04, Leo Yan wrote:
> Hi Daniel,
> 
> On Mon, Aug 21, 2017 at 12:06:17PM +0200, Daniel Lezcano wrote:
> 
> [...]
> 
>> Hi Leo,
>>
>> a cleanest solution would be either:
>>
>>  - add the 3 missing thermal sensors in the DT and default to the id 2
> 
> Yeah, so do you think below change works for you?

Isn't it possible to set the delay also ? so we don't have to send
another patch if we want to use one of those instead of 2.


> ---8<---
> 
>     ARM64: dts: hisilicon: add missed thermal sensors for Hi6220
> 
>     The thermal driver tries to register four sensors but the DT only binds
>     one sensor (sensor ID 2) with thermal zone, as result the thermal driver
>     reports failure for missed thermal sensor binding.
> 
>     This patch adds missed thermal sensor for Hi6220, so can dismiss the
>     booting failure log.
> 
> diff --git a/arch/arm64/boot/dts/hisilicon/hi6220.dtsi b/arch/arm64/boot/dts/hisilicon/hi6220.dtsi
> index eacbe0d..44c2bc7 100644
> --- a/arch/arm64/boot/dts/hisilicon/hi6220.dtsi
> +++ b/arch/arm64/boot/dts/hisilicon/hi6220.dtsi
> @@ -833,6 +833,18 @@
>  
>                 thermal-zones {
>  
> +                       local: local {
> +                               polling-delay = <0>;
> +                               polling-delay-passive = <0>;
> +                               thermal-sensors = <&tsensor 0>;
> +                       };
> +
> +                       cls1: cls1 {
> +                               polling-delay = <0>;
> +                               polling-delay-passive = <0>;
> +                               thermal-sensors = <&tsensor 1>;
> +                       };
> +
>                         cls0: cls0 {
>                                 polling-delay = <1000>;
>                                 polling-delay-passive = <100>;
> @@ -862,6 +874,12 @@
>                                         };
>                                 };
>                         };
> +
> +                       gpu: gpu {
> +                               polling-delay = <0>;
> +                               polling-delay-passive = <0>;
> +                               thermal-sensors = <&tsensor 3>;
> +                       };
>                 };
>  
> 
>> or
>>
>>  - remove all the code assuming 4 sensors and deal with the one unique
>> sensor
> 
> I personally prefer to avoid doing this, if only register one unique
> sensor this will let us have no flexiblity for trying multiple sensors
> on this platform.

Ok, I will on the other side give a cleanup in the driver to optimize
the sensors lookup.

Thanks
  -- Daniel


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