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

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Message-ID: <415ca710-1b28-47e5-bffa-3f9f76c59041@linaro.org>
Date: Mon, 15 Jan 2024 18:17:03 +0100
From: Daniel Lezcano <daniel.lezcano@...aro.org>
To: AngeloGioacchino Del Regno <angelogioacchino.delregno@...labora.com>
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()

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" ?

> 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);
>   }

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