linux-kernel - Re: [PATCH v1 02/18] thermal: Add new structures and thermal_zone_device

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Date: Mon, 12 Feb 2024 11:41:43 +0100
From: AngeloGioacchino Del Regno <angelogioacchino.delregno@...labora.com>
To: "Rafael J. Wysocki" <rafael@...nel.org>,
 Dan Carpenter <dan.carpenter@...aro.org>, daniel.lezcano@...aro.org
Cc: miquel.raynal@...tlin.com, rui.zhang@...el.com, lukasz.luba@....com,
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 kernel@...gutronix.de, festevam@...il.com, linux-imx@....com,
 andersson@...nel.org, konrad.dybcio@...aro.org, amitk@...nel.org,
 thara.gopinath@...il.com, niklas.soderlund@...natech.se,
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Subject: Re: [PATCH v1 02/18] thermal: Add new structures and
 thermal_zone_device_register()

Il 02/02/24 18:13, Rafael J. Wysocki ha scritto:
> On Fri, Feb 2, 2024 at 9:47 AM Dan Carpenter <dan.carpenter@...aro.org> wrote:
>>
>> On Thu, Feb 01, 2024 at 08:24:15PM +0100, Rafael J. Wysocki wrote:
>>> On Tue, Jan 30, 2024 at 12:13 PM AngeloGioacchino Del Regno
>>>> diff --git a/include/linux/thermal.h b/include/linux/thermal.h
>>>> index 65d8f92a9a0d..7a540b746703 100644
>>>> --- a/include/linux/thermal.h
>>>> +++ b/include/linux/thermal.h
>>>> @@ -149,7 +149,8 @@ struct thermal_cooling_device {
>>>>                          passive trip point.
>>>>    * @need_update:       if equals 1, thermal_zone_device_update needs to be invoked.
>>>>    * @ops:       operations this &thermal_zone_device supports
>>>> - * @tzp:       thermal zone parameters
>>>> + * @tzp:               Thermal zone parameters
>>>> + * @tgp:               Thermal zone governor parameters
>>>>    * @governor:  pointer to the governor for this thermal zone
>>>>    * @governor_data:     private pointer for governor data
>>>>    * @thermal_instances: list of &struct thermal_instance of this thermal zone
>>>> @@ -184,7 +185,8 @@ struct thermal_zone_device {
>>>>          int prev_high_trip;
>>>>          atomic_t need_update;
>>>>          struct thermal_zone_device_ops *ops;
>>>> -       struct thermal_zone_params *tzp;
>>>> +       struct thermal_zone_platform_params *tzp;
>>>> +       struct thermal_governor_params *tgp;
>>>
>>> I agree with doing a split here, but I'm not sure about moving items
>>> from the arg list to struct thermal_zone_platform_params (as mentioned
>>> above).
>>>
>>> Also the naming is quite inconsistent.  IMO it would be better to call
>>> the first pointer "tzpp", rename struct thermal_governor_params to
>>> struct thermal_zone_governor_params and call the second pointer
>>> "tzgp".
>>>
>>
>> The names "tzgp" and "tzpp" look almost identical at first glance.
>> Could we increase the hamming distance somehow?
> 
> Good point.
> 
> They may as well be gov_params and platform_params AFAIAC.

I'm more for gov_params and zone_params, as the thermal_zone_platform_params is
supposed to get renamed to struct thermal_zone_params in part 2.

Anything against that?

Cheers,
Angelo