linux-kernel - Re: [PATCH] hwmon: (gsc-hwmon) fix fan pwm temperature scaling

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Date:   Thu, 8 Jun 2023 06:36:14 -0700
From:   Guenter Roeck <linux@...ck-us.net>
To:     Tim Harvey <tharvey@...eworks.com>
Cc:     linux-kernel@...r.kernel.org, linux-hwmon@...r.kernel.org,
        Jean Delvare <jdelvare@...e.com>
Subject: Re: [PATCH] hwmon: (gsc-hwmon) fix fan pwm temperature scaling

On Tue, Jun 06, 2023 at 08:30:04AM -0700, Tim Harvey wrote:
> The GSC fan pwm temperature register is in centidegrees celcius but the
> Linux hwmon convention is to use milidegrees celcius. Fix the scaling.
> 
> Fixes: 3bce5377ef66 ("hwmon: Add Gateworks System Controller support")
> Signed-off-by: Tim Harvey <tharvey@...eworks.com>

Applied.

Thanks,
Guenter

> ---
>  drivers/hwmon/gsc-hwmon.c | 6 +++---
>  1 file changed, 3 insertions(+), 3 deletions(-)
> 
> diff --git a/drivers/hwmon/gsc-hwmon.c b/drivers/hwmon/gsc-hwmon.c
> index 73e5d92b200b..1501ceb551e7 100644
> --- a/drivers/hwmon/gsc-hwmon.c
> +++ b/drivers/hwmon/gsc-hwmon.c
> @@ -82,8 +82,8 @@ static ssize_t pwm_auto_point_temp_store(struct device *dev,
>  	if (kstrtol(buf, 10, &temp))
>  		return -EINVAL;
>  
> -	temp = clamp_val(temp, 0, 10000);
> -	temp = DIV_ROUND_CLOSEST(temp, 10);
> +	temp = clamp_val(temp, 0, 100000);
> +	temp = DIV_ROUND_CLOSEST(temp, 100);
>  
>  	regs[0] = temp & 0xff;
>  	regs[1] = (temp >> 8) & 0xff;
> @@ -100,7 +100,7 @@ static ssize_t pwm_auto_point_pwm_show(struct device *dev,
>  {
>  	struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
>  
> -	return sprintf(buf, "%d\n", 255 * (50 + (attr->index * 10)) / 100);
> +	return sprintf(buf, "%d\n", 255 * (50 + (attr->index * 10)));
>  }
>  
>  static SENSOR_DEVICE_ATTR_RO(pwm1_auto_point1_pwm, pwm_auto_point_pwm, 0);