linux-kernel - [PATCH v2] iio/gyro/bmg160: Use millidegrees for temperature scale

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Date:   Wed, 13 Feb 2019 08:41:47 +0100
From:   Mike Looijmans <mike.looijmans@...ic.nl>
To:     linux-iio@...r.kernel.org
Cc:     linux-kernel@...r.kernel.org, jic23@...nel.org, knaack.h@....de,
        lars@...afoo.de, pmeerw@...erw.net,
        Mike Looijmans <mike.looijmans@...ic.nl>
Subject: [PATCH v2] iio/gyro/bmg160: Use millidegrees for temperature scale

Standard unit for temperature is millidegrees Celcius, whereas this driver
was reporting in degrees. Fix the scale factor in the driver.

Signed-off-by: Mike Looijmans <mike.looijmans@...ic.nl>
---
v2: Don't touch val2 when returning IIO_VAL_INT
    Only touch val when returning a value

 drivers/iio/gyro/bmg160_core.c | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/drivers/iio/gyro/bmg160_core.c b/drivers/iio/gyro/bmg160_core.c
index 63ca316..92c07ab 100644
--- a/drivers/iio/gyro/bmg160_core.c
+++ b/drivers/iio/gyro/bmg160_core.c
@@ -582,11 +582,10 @@ static int bmg160_read_raw(struct iio_dev *indio_dev,
 	case IIO_CHAN_INFO_LOW_PASS_FILTER_3DB_FREQUENCY:
 		return bmg160_get_filter(data, val);
 	case IIO_CHAN_INFO_SCALE:
-		*val = 0;
 		switch (chan->type) {
 		case IIO_TEMP:
-			*val2 = 500000;
-			return IIO_VAL_INT_PLUS_MICRO;
+			*val = 500;
+			return IIO_VAL_INT;
 		case IIO_ANGL_VEL:
 		{
 			int i;
@@ -594,6 +593,7 @@ static int bmg160_read_raw(struct iio_dev *indio_dev,
 			for (i = 0; i < ARRAY_SIZE(bmg160_scale_table); ++i) {
 				if (bmg160_scale_table[i].dps_range ==
 							data->dps_range) {
+					*val = 0;
 					*val2 = bmg160_scale_table[i].scale;
 					return IIO_VAL_INT_PLUS_MICRO;
 				}
-- 
1.9.1