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From: Shreeya Patel <shreeya.patel@collabora.com>
To: jic23@kernel.org, lars@metafoo.de
Cc: linux-iio@vger.kernel.org, linux-kernel@vger.kernel.org,
	Shreeya Patel <shreeya.patel@collabora.com>
Subject: [PATCH] iio: light: ltrf216a: Return floating point values
Date: Wed,  8 Nov 2023 00:50:05 +0530	[thread overview]
Message-ID: <20231107192005.285534-1-shreeya.patel@collabora.com> (raw)

For better precision of input light intesity, return floating point
values through sysfs instead of an integer value

Signed-off-by: Shreeya Patel <shreeya.patel@collabora.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);
-- 
2.39.2


             reply	other threads:[~2023-11-07 19:20 UTC|newest]

Thread overview: 3+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2023-11-07 19:20 Shreeya Patel [this message]
2023-11-21 19:35 ` [PATCH] iio: light: ltrf216a: Return floating point values Shreeya Patel
2023-11-26 18:02   ` Jonathan Cameron

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