linux-kernel - Re: [PATCH] thermal: amlogic: Add hwmon support

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Message-ID: <13c3b1c5-9c06-d663-47ae-5ccd8f87fe57@baylibre.com>
Date:   Mon, 16 Nov 2020 09:35:07 +0100
From:   Neil Armstrong <narmstrong@...libre.com>
To:     Martin Blumenstingl <martin.blumenstingl@...glemail.com>,
        glaroque@...libre.com, linux-pm@...r.kernel.org,
        linux-amlogic@...ts.infradead.org
Cc:     amitk@...nel.org, rui.zhang@...el.com, daniel.lezcano@...aro.org,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH] thermal: amlogic: Add hwmon support

On 15/11/2020 20:06, Martin Blumenstingl wrote:
> Many monitoring tools read the CPU temperature using the hwmon
> interface. Expose the thermal sensors on Amlogic boards as hwmon
> devices.
> 
> Without this lm_sensors' "sensors" tool does not find any temperature
> sensors. Now it prints:
>   cpu_thermal-virtual-0
>   Adapter: Virtual device
>   temp1:        +44.7 C  (crit = +110.0 C)
> 
>   ddr_thermal-virtual-0
>   Adapter: Virtual device
>   temp1:        +45.9 C  (crit = +110.0 C)
> 
> Signed-off-by: Martin Blumenstingl <martin.blumenstingl@...glemail.com>
> ---
>  drivers/thermal/amlogic_thermal.c | 4 ++++
>  1 file changed, 4 insertions(+)
> 
> diff --git a/drivers/thermal/amlogic_thermal.c b/drivers/thermal/amlogic_thermal.c
> index ccb1fe18e993..dffe3ba8c7c4 100644
> --- a/drivers/thermal/amlogic_thermal.c
> +++ b/drivers/thermal/amlogic_thermal.c
> @@ -29,6 +29,7 @@
>  #include <linux/thermal.h>
>  
>  #include "thermal_core.h"
> +#include "thermal_hwmon.h"
>  
>  #define TSENSOR_CFG_REG1			0x4
>  	#define TSENSOR_CFG_REG1_RSET_VBG	BIT(12)
> @@ -287,6 +288,9 @@ static int amlogic_thermal_probe(struct platform_device *pdev)
>  		return ret;
>  	}l
>  
> +	if (devm_thermal_add_hwmon_sysfs(pdata->tzd))
> +		dev_warn(&pdev->dev, "Failed to add hwmon sysfs attributes\n");
> +
>  	ret = amlogic_thermal_initialize(pdata);
>  	if (ret)
>  		return ret;
> 

Thanks !!

Reviewed-by: Neil Armstrong <narmstrong@...libre.com>