linux-kernel - Re: [PATCH v1 17/33] thermal/drivers/rcar: Switch to new of API

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Date:   Fri, 22 Jul 2022 21:34:37 +0200
From:   Daniel Lezcano <daniel.lezcano@...exp.org>
To:     Niklas Söderlund <niklas.soderlund@...natech.se>
Cc:     daniel.lezcano@...aro.org, rafael@...nel.org, rui.zhang@...el.com,
        khilman@...libre.com, abailon@...libre.com, amitk@...nel.org,
        linux-kernel@...r.kernel.org, linux-pm@...r.kernel.org,
        "open list:RENESAS R-CAR THERMAL DRIVERS" 
        <linux-renesas-soc@...r.kernel.org>
Subject: Re: [PATCH v1 17/33] thermal/drivers/rcar: Switch to new of API


Hi Niklas,

On 19/07/2022 11:10, Niklas Söderlund wrote:
> Hi Daniel,
> 
> Thanks for your work.
> 
> On 2022-07-10 23:24:07 +0200, Daniel Lezcano wrote:
>> The thermal OF code has a new API allowing to migrate the OF
>> initialization to a simpler approach.
>>
>> Use this new API.
> 
> I tested this together with the series it depends on and while
> temperature monitoring seems to work fine it breaks the emul_temp
> interface (/sys/class/thermal/thermal_zone2/emul_temp).
> 
> Before this change I can write a temperature to this file and have it
> trigger actions, in my test-case changing the cooling state, which I
> observe in /sys/class/thermal/cooling_device0/cur_state.
> 
> Likewise before this change I could trip the critical trip-point that
> would power off the board using the emul_temp interface, this too no
> longer works,
> 
>      echo 120000 > /sys/class/thermal/thermal_zone2/emul_temp
> 
> Is this an intention change of the new API?

Absolutely not :)

Thanks for taking the time to test and report back the issue. I'll 
investigate that.

   -- D.