linux-kernel - Re: [PATCH] iio: light: ltrf216a: Return floating point values

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Date:   Wed, 22 Nov 2023 01:05:41 +0530
From:   Shreeya Patel <shreeya.patel@...labora.com>
To:     jic23@...nel.org
Cc:     linux-iio@...r.kernel.org, linux-kernel@...r.kernel.org,
        lars@...afoo.de
Subject: Re: [PATCH] iio: light: ltrf216a: Return floating point values



On 08/11/23 00:50, Shreeya Patel wrote:
> For better precision of input light intesity, return floating point
> values through sysfs instead of an integer value

Hi Jonathan,

Gentle ping for this patch. I am not sure if you got time to look at the 
patches
after LPC but just making sure it doesn't get lost between bunch of 
others :)


Thanks,
Shreeya Patel

>
> Signed-off-by: Shreeya Patel <shreeya.patel@...labora.com>
> ---
>   drivers/iio/light/ltrf216a.c | 10 +++++-----
>   1 file changed, 5 insertions(+), 5 deletions(-)
>
> diff --git a/drivers/iio/light/ltrf216a.c b/drivers/iio/light/ltrf216a.c
> index 8de4dd849936..68dc48420a88 100644
> --- a/drivers/iio/light/ltrf216a.c
> +++ b/drivers/iio/light/ltrf216a.c
> @@ -234,7 +234,7 @@ static int ltrf216a_read_data(struct ltrf216a_data *data, u8 addr)
>   static int ltrf216a_get_lux(struct ltrf216a_data *data)
>   {
>   	int ret, greendata;
> -	u64 lux, div;
> +	u64 lux;
>   
>   	ret = ltrf216a_set_power_state(data, true);
>   	if (ret)
> @@ -246,10 +246,9 @@ static int ltrf216a_get_lux(struct ltrf216a_data *data)
>   
>   	ltrf216a_set_power_state(data, false);
>   
> -	lux = greendata * 45 * LTRF216A_WIN_FAC * 100;
> -	div = data->als_gain_fac * data->int_time_fac * 100;
> +	lux = greendata * 45 * LTRF216A_WIN_FAC;
>   
> -	return div_u64(lux, div);
> +	return lux;
>   }
>   
>   static int ltrf216a_read_raw(struct iio_dev *indio_dev,
> @@ -279,7 +278,8 @@ static int ltrf216a_read_raw(struct iio_dev *indio_dev,
>   		if (ret < 0)
>   			return ret;
>   		*val = ret;
> -		return IIO_VAL_INT;
> +		*val2 = data->als_gain_fac * data->int_time_fac;
> +		return IIO_VAL_FRACTIONAL;
>   	case IIO_CHAN_INFO_INT_TIME:
>   		mutex_lock(&data->lock);
>   		ret = ltrf216a_get_int_time(data, val, val2);