linux-kernel - Re: [PATCH 2/3] thermal: sti: depend on THERMAL

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Date: Tue, 25 Jun 2024 08:39:09 +0200
From: Patrice CHOTARD <patrice.chotard@...s.st.com>
To: Raphael Gallais-Pou <rgallaispou@...il.com>,
        "Rafael J. Wysocki"
	<rafael@...nel.org>,
        Daniel Lezcano <daniel.lezcano@...aro.org>,
        Zhang Rui
	<rui.zhang@...el.com>, Lukasz Luba <lukasz.luba@....com>,
        Maxime Coquelin
	<mcoquelin.stm32@...il.com>,
        Alexandre Torgue <alexandre.torgue@...s.st.com>,
        Rob Herring <robh@...nel.org>,
        Krzysztof Kozlowski <krzk+dt@...nel.org>,
        Conor Dooley <conor+dt@...nel.org>
CC: <linux-pm@...r.kernel.org>, <linux-kernel@...r.kernel.org>,
        <linux-stm32@...md-mailman.stormreply.com>,
        <linux-arm-kernel@...ts.infradead.org>, <devicetree@...r.kernel.org>
Subject: Re: [PATCH 2/3] thermal: sti: depend on THERMAL_OF subsystem



On 5/18/24 14:12, Raphael Gallais-Pou wrote:
> Switch to thermal_of_zone to handle thermal-zones. Replace
> thermal_zone_device_register() by devm_thermal_of_zone_register() and
> remove ops st_thermal_get_trip_type, st_thermal_get_trip_temp.
> 
> Signed-off-by: Raphael Gallais-Pou <rgallaispou@...il.com>
> ---
>  drivers/thermal/st/Kconfig      |  1 +
>  drivers/thermal/st/st_thermal.c | 20 ++++++++++----------
>  2 files changed, 11 insertions(+), 10 deletions(-)
> 
> diff --git a/drivers/thermal/st/Kconfig b/drivers/thermal/st/Kconfig
> index ecbdf4ef00f4..2d08147876ee 100644
> --- a/drivers/thermal/st/Kconfig
> +++ b/drivers/thermal/st/Kconfig
> @@ -5,6 +5,7 @@
>  
>  config ST_THERMAL
>  	tristate "Thermal sensors on STMicroelectronics STi series of SoCs"
> +	depends on THERMAL_OF
>  	help
>  	  Support for thermal sensors on STMicroelectronics STi series of SoCs.
>  
> diff --git a/drivers/thermal/st/st_thermal.c b/drivers/thermal/st/st_thermal.c
> index 5f33543a3a54..60e70de724d4 100644
> --- a/drivers/thermal/st/st_thermal.c
> +++ b/drivers/thermal/st/st_thermal.c
> @@ -12,6 +12,7 @@
>  #include <linux/of_device.h>
>  
>  #include "st_thermal.h"
> +#include "../thermal_hwmon.h"
>  
>  /* The Thermal Framework expects millidegrees */
>  #define mcelsius(temp)			((temp) * 1000)
> @@ -203,23 +204,21 @@ int st_thermal_register(struct platform_device *pdev,
>  	trip.type = THERMAL_TRIP_CRITICAL;
>  
>  	sensor->thermal_dev =
> -		thermal_zone_device_register_with_trips(dev_name(dev), &trip, 1, sensor,
> -							&st_tz_ops, NULL, 0, polling_delay);
> +		devm_thermal_of_zone_register(dev, 0, sensor, &st_tz_ops);

The struct trip becomes no more used, it can be removed.



>  	if (IS_ERR(sensor->thermal_dev)) {
> -		dev_err(dev, "failed to register thermal zone device\n");
> +		dev_err(dev, "failed to register thermal of zone\n");
>  		ret = PTR_ERR(sensor->thermal_dev);
>  		goto sensor_off;
>  	}
> -	ret = thermal_zone_device_enable(sensor->thermal_dev);
> -	if (ret)
> -		goto tzd_unregister;
>  
>  	platform_set_drvdata(pdev, sensor);
>  
> -	return 0;
> +	/*
> +	 * devm_thermal_of_zone_register() doesn't enable hwmon by default
> +	 * Enable it here
> +	 */
> +	return devm_thermal_add_hwmon_sysfs(dev, sensor->thermal_dev);
>  
> -tzd_unregister:
> -	thermal_zone_device_unregister(sensor->thermal_dev);
>  sensor_off:
>  	st_thermal_sensor_off(sensor);
>  
> @@ -232,7 +231,8 @@ void st_thermal_unregister(struct platform_device *pdev)
>  	struct st_thermal_sensor *sensor = platform_get_drvdata(pdev);
>  
>  	st_thermal_sensor_off(sensor);
> -	thermal_zone_device_unregister(sensor->thermal_dev);
> +	thermal_remove_hwmon_sysfs(sensor->thermal_dev);
> +	devm_thermal_of_zone_unregister(sensor->dev, sensor->thermal_dev);
>  }
>  EXPORT_SYMBOL_GPL(st_thermal_unregister);
>  
>