linux-kernel - Re: [PATCH v1 04/17] thermal/hwmon: Do not set no_hwmon before calling thermal_add_hwmon

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Message-ID: <Y/I7dZiHqT0xH7tC@oden.dyn.berto.se>
Date:   Sun, 19 Feb 2023 16:08:37 +0100
From:   Niklas Söderlund <niklas.soderlund@...natech.se>
To:     Daniel Lezcano <daniel.lezcano@...aro.org>
Cc:     rafael@...nel.org, linux-pm@...r.kernel.org,
        linux-kernel@...r.kernel.org, Amit Kucheria <amitk@...nel.org>,
        Zhang Rui <rui.zhang@...el.com>,
        Florian Fainelli <f.fainelli@...il.com>,
        Broadcom internal kernel review list 
        <bcm-kernel-feedback-list@...adcom.com>,
        Ray Jui <rjui@...adcom.com>,
        Scott Branden <sbranden@...adcom.com>,
        Heiko Stuebner <heiko@...ech.de>,
        Stefan Wahren <stefan.wahren@...e.com>,
        Kunihiko Hayashi <hayashi.kunihiko@...ionext.com>,
        Miquel Raynal <miquel.raynal@...tlin.com>,
        Neil Armstrong <neil.armstrong@...aro.org>,
        ye xingchen <ye.xingchen@....com.cn>,
        "moderated list:BROADCOM BCM2711/BCM2835 ARM ARCHITECTURE" 
        <linux-rpi-kernel@...ts.infradead.org>,
        "moderated list:BROADCOM BCM2711/BCM2835 ARM ARCHITECTURE" 
        <linux-arm-kernel@...ts.infradead.org>,
        "open list:RENESAS R-CAR THERMAL DRIVERS" 
        <linux-renesas-soc@...r.kernel.org>,
        "open list:ARM/Rockchip SoC support" 
        <linux-rockchip@...ts.infradead.org>
Subject: Re: [PATCH v1 04/17] thermal/hwmon: Do not set no_hwmon before
 calling thermal_add_hwmon_sysfs()

Hi Daniel,

Thanks for your work.

On 2023-02-19 15:36:44 +0100, Daniel Lezcano wrote:
> The thermal->tzp->no_hwmon parameter is only used when calling
> thermal_zone_device_register().
> 
> Setting it to 'false' before calling thermal_add_hwmon_sysfs() has no
> effect.
> 
> Remove the call and again prevent the drivers to access the thermal
> internals.
> 
> Signed-off-by: Daniel Lezcano <daniel.lezcano@...aro.org>
> ---
>  drivers/thermal/broadcom/bcm2711_thermal.c | 1 -
>  drivers/thermal/broadcom/bcm2835_thermal.c | 1 -
>  drivers/thermal/rcar_gen3_thermal.c        | 1 -
>  drivers/thermal/rcar_thermal.c             | 5 -----

For R-Car,

Reviewed-by: Niklas Söderlund <niklas.soderlund+renesas@...natech.se>

>  drivers/thermal/rockchip_thermal.c         | 1 -
>  drivers/thermal/rzg2l_thermal.c            | 1 -
>  6 files changed, 10 deletions(-)
> 
> diff --git a/drivers/thermal/broadcom/bcm2711_thermal.c b/drivers/thermal/broadcom/bcm2711_thermal.c
> index 18b1a4d9ecc7..0a499435431c 100644
> --- a/drivers/thermal/broadcom/bcm2711_thermal.c
> +++ b/drivers/thermal/broadcom/bcm2711_thermal.c
> @@ -98,7 +98,6 @@ static int bcm2711_thermal_probe(struct platform_device *pdev)
>  
>  	priv->thermal = thermal;
>  
> -	thermal->tzp->no_hwmon = false;
>  	return thermal_add_hwmon_sysfs(thermal);
>  }
>  
> diff --git a/drivers/thermal/broadcom/bcm2835_thermal.c b/drivers/thermal/broadcom/bcm2835_thermal.c
> index de2f573863da..8ed7a80122a0 100644
> --- a/drivers/thermal/broadcom/bcm2835_thermal.c
> +++ b/drivers/thermal/broadcom/bcm2835_thermal.c
> @@ -267,7 +267,6 @@ static int bcm2835_thermal_probe(struct platform_device *pdev)
>  	 * Thermal_zone doesn't enable hwmon as default,
>  	 * enable it here
>  	 */
> -	tz->tzp->no_hwmon = false;
>  	err = thermal_add_hwmon_sysfs(tz);
>  	if (err)
>  		goto err_tz;
> diff --git a/drivers/thermal/rcar_gen3_thermal.c b/drivers/thermal/rcar_gen3_thermal.c
> index 8ad713cb4bf7..4ea9d4bd8e6f 100644
> --- a/drivers/thermal/rcar_gen3_thermal.c
> +++ b/drivers/thermal/rcar_gen3_thermal.c
> @@ -527,7 +527,6 @@ static int rcar_gen3_thermal_probe(struct platform_device *pdev)
>  		}
>  		tsc->zone = zone;
>  
> -		tsc->zone->tzp->no_hwmon = false;
>  		ret = thermal_add_hwmon_sysfs(tsc->zone);
>  		if (ret)
>  			goto error_unregister;
> diff --git a/drivers/thermal/rcar_thermal.c b/drivers/thermal/rcar_thermal.c
> index 538ed6731589..919f0e32d3c5 100644
> --- a/drivers/thermal/rcar_thermal.c
> +++ b/drivers/thermal/rcar_thermal.c
> @@ -509,11 +509,6 @@ static int rcar_thermal_probe(struct platform_device *pdev)
>  		}
>  
>  		if (chip->use_of_thermal) {
> -			/*
> -			 * thermal_zone doesn't enable hwmon as default,
> -			 * but, enable it here to keep compatible
> -			 */
> -			priv->zone->tzp->no_hwmon = false;
>  			ret = thermal_add_hwmon_sysfs(priv->zone);
>  			if (ret)
>  				goto error_unregister;
> diff --git a/drivers/thermal/rockchip_thermal.c b/drivers/thermal/rockchip_thermal.c
> index bd593ec712ee..3211b70c85b9 100644
> --- a/drivers/thermal/rockchip_thermal.c
> +++ b/drivers/thermal/rockchip_thermal.c
> @@ -1451,7 +1451,6 @@ static int rockchip_thermal_probe(struct platform_device *pdev)
>  
>  	for (i = 0; i < thermal->chip->chn_num; i++) {
>  		rockchip_thermal_toggle_sensor(&thermal->sensors[i], true);
> -		thermal->sensors[i].tzd->tzp->no_hwmon = false;
>  		error = thermal_add_hwmon_sysfs(thermal->sensors[i].tzd);
>  		if (error)
>  			dev_warn(&pdev->dev,
> diff --git a/drivers/thermal/rzg2l_thermal.c b/drivers/thermal/rzg2l_thermal.c
> index d3ba2a74e42d..a2f21c941cfe 100644
> --- a/drivers/thermal/rzg2l_thermal.c
> +++ b/drivers/thermal/rzg2l_thermal.c
> @@ -216,7 +216,6 @@ static int rzg2l_thermal_probe(struct platform_device *pdev)
>  	}
>  
>  	priv->zone = zone;
> -	priv->zone->tzp->no_hwmon = false;
>  	ret = thermal_add_hwmon_sysfs(priv->zone);
>  	if (ret)
>  		goto err;
> -- 
> 2.34.1
> 

-- 
Kind Regards,
Niklas Söderlund