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Subject[PATCH 1/4] iio: light: vl6180: Move range check to integration time setter, cleanup
Date
This improves code uniformity (range checks for als_gain are also done
in the setter). Also unmangle rounding and calculation of register value.

The calculated integration time it_ms is required in the next patch of
the series.

Signed-off-by: Stefan Brüns <stefan.bruens@rwth-aachen.de>
---
drivers/iio/light/vl6180.c | 18 +++++++++++-------
1 file changed, 11 insertions(+), 7 deletions(-)

diff --git a/drivers/iio/light/vl6180.c b/drivers/iio/light/vl6180.c
index 6e25b724d941..57577d5d18ac 100644
--- a/drivers/iio/light/vl6180.c
+++ b/drivers/iio/light/vl6180.c
@@ -386,16 +386,21 @@ static int vl6180_set_als_gain(struct vl6180_data *data, int val, int val2)
return -EINVAL;
}

-static int vl6180_set_it(struct vl6180_data *data, int val2)
+static int vl6180_set_it(struct vl6180_data *data, int val, int val2)
{
- int ret;
+ int ret, it_ms;
+
+ it_ms = ((val2 + 500) / 1000); /* round to ms */
+ if (val != 0 || it_ms < 1 || it_ms > 512)
+ return -EINVAL;

mutex_lock(&data->lock);
ret = vl6180_hold(data, true);
if (ret < 0)
goto fail;
- ret = vl6180_write_word(data->client, VL6180_ALS_IT,
- (val2 - 500) / 1000); /* write value in ms */
+
+ ret = vl6180_write_word(data->client, VL6180_ALS_IT, it_ms - 1);
+
fail:
vl6180_hold(data, false);
mutex_unlock(&data->lock);
@@ -411,15 +416,14 @@ static int vl6180_write_raw(struct iio_dev *indio_dev,

switch (mask) {
case IIO_CHAN_INFO_INT_TIME:
- if (val != 0 || val2 < 500 || val2 >= 512500)
- return -EINVAL;
+ return vl6180_set_it(data, val, val2);

- return vl6180_set_it(data, val2);
case IIO_CHAN_INFO_HARDWAREGAIN:
if (chan->type != IIO_LIGHT)
return -EINVAL;

return vl6180_set_als_gain(data, val, val2);
+
default:
return -EINVAL;
}
--
2.14.1
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