linux-kernel - Re: [RFC PATCH 02/26] thermal/of: Migrate to thermal_zone_device

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Date: Tue, 16 Jan 2024 10:50:30 +0100
From: AngeloGioacchino Del Regno <angelogioacchino.delregno@...labora.com>
To: Daniel Lezcano <daniel.lezcano@...aro.org>
Cc: rafael@...nel.org, rui.zhang@...el.com, lukasz.luba@....com,
 linux-pm@...r.kernel.org, linux-kernel@...r.kernel.org, kernel@...labora.com
Subject: Re: [RFC PATCH 02/26] thermal/of: Migrate to
 thermal_zone_device_register()

Il 15/01/24 18:17, Daniel Lezcano ha scritto:
> On 21/12/2023 13:48, AngeloGioacchino Del Regno wrote:
>> The thermal API has a new thermal_zone_device_register() function which
>> is deprecating the older thermal_zone_device_register_with_trips() and
>> thermal_tripless_zone_device_register().
>>
>> Migrate to the new thermal zone device registration function.
> 
> Sounds good to me.
> 
> May be add "No functional change intended" ?
> 

Yeah, makes sense - will add "This patch brings no functional changes".

Cheers!

>> Signed-off-by: AngeloGioacchino Del Regno 
>> <angelogioacchino.delregno@...labora.com > ---
>>   drivers/thermal/thermal_of.c | 37 ++++++++++++++++--------------------
>>   1 file changed, 16 insertions(+), 21 deletions(-)
>>
>> diff --git a/drivers/thermal/thermal_of.c b/drivers/thermal/thermal_of.c
>> index 1e0655b63259..62a903ad649f 100644
>> --- a/drivers/thermal/thermal_of.c
>> +++ b/drivers/thermal/thermal_of.c
>> @@ -471,16 +471,12 @@ static struct thermal_zone_device 
>> *thermal_of_zone_register(struct device_node *
>>                                   const struct thermal_zone_device_ops *ops)
>>   {
>>       struct thermal_zone_device *tz;
>> -    struct thermal_trip *trips;
>> -    struct thermal_zone_params tzp = {};
>> -    struct thermal_zone_device_ops *of_ops;
>> +    struct thermal_zone_device_params tzdp;
>>       struct device_node *np;
>> -    int delay, pdelay;
>> -    int ntrips, mask;
>>       int ret;
>> -    of_ops = kmemdup(ops, sizeof(*ops), GFP_KERNEL);
>> -    if (!of_ops)
>> +    tzdp.ops = kmemdup(ops, sizeof(*ops), GFP_KERNEL);
>> +    if (!tzdp.ops)
>>           return ERR_PTR(-ENOMEM);
>>       np = of_thermal_zone_find(sensor, id);
>> @@ -490,30 +486,29 @@ static struct thermal_zone_device 
>> *thermal_of_zone_register(struct device_node *
>>           ret = PTR_ERR(np);
>>           goto out_kfree_of_ops;
>>       }
>> +    tzdp.type = np->name;
>> -    trips = thermal_of_trips_init(np, &ntrips);
>> -    if (IS_ERR(trips)) {
>> +    tzdp.trips = thermal_of_trips_init(np, &tzdp.num_trips);
>> +    if (IS_ERR(tzdp.trips)) {
>>           pr_err("Failed to find trip points for %pOFn id=%d\n", sensor, id);
>> -        ret = PTR_ERR(trips);
>> +        ret = PTR_ERR(tzdp.trips);
>>           goto out_kfree_of_ops;
>>       }
>> -    ret = thermal_of_monitor_init(np, &delay, &pdelay);
>> +    ret = thermal_of_monitor_init(np, &tzdp.polling_delay, &tzdp.passive_delay);
>>       if (ret) {
>>           pr_err("Failed to initialize monitoring delays from %pOFn\n", np);
>>           goto out_kfree_trips;
>>       }
>> -    thermal_of_parameters_init(np, &tzp);
>> +    thermal_of_parameters_init(np, &tzdp.tzp);
>> -    of_ops->bind = thermal_of_bind;
>> -    of_ops->unbind = thermal_of_unbind;
>> +    tzdp.ops->bind = thermal_of_bind;
>> +    tzdp.ops->unbind = thermal_of_unbind;
>> +    tzdp.mask = GENMASK_ULL((tzdp.num_trips) - 1, 0);
>> +    tzdp.devdata = data;
>> -    mask = GENMASK_ULL((ntrips) - 1, 0);
>> -
>> -    tz = thermal_zone_device_register_with_trips(np->name, trips, ntrips,
>> -                             mask, data, of_ops, &tzp,
>> -                             pdelay, delay);
>> +    tz = thermal_zone_device_register(&tzdp);
>>       if (IS_ERR(tz)) {
>>           ret = PTR_ERR(tz);
>>           pr_err("Failed to register thermal zone %pOFn: %d\n", np, ret);
>> @@ -531,9 +526,9 @@ static struct thermal_zone_device 
>> *thermal_of_zone_register(struct device_node *
>>       return tz;
>>   out_kfree_trips:
>> -    kfree(trips);
>> +    kfree(tzdp.trips);
>>   out_kfree_of_ops:
>> -    kfree(of_ops);
>> +    kfree(tzdp.ops);
>>       return ERR_PTR(ret);
>>   }
>