Commit 3525d7cf authored Sep 24, 2017 by Stefan Brüns Committed by Jonathan Cameron Oct 09, 2017

iio: light: vl6180: Correct ALS scale for non-default gain/integration time



The reported scale was only correct for the default settings of 100 ms
integration time and gain 1.

This aligns the reported scale with the behaviour of any other IIO driver
and the documented ABI, but may require userspace changes if someone uses
non-default settings.

Signed-off-by: Stefan Brüns <stefan.bruens@rwth-aachen.de>
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>

parent e794bf67

drivers/iio/light/vl6180.c

+6 −3

Original line number	Diff line number	Diff line
		@@ -315,9 +315,12 @@ static int vl6180_read_raw(struct iio_dev *indio_dev,
		case IIO_CHAN_INFO_SCALE:
		switch (chan->type) {
		case IIO_LIGHT:
		val = 0; / one ALS count is 0.32 Lux */
		*val2 = 320000;
		break;
		/* one ALS count is 0.32 Lux @ gain 1, IT 100 ms */
		val = 32000; / 0.32 * 1000 * 100 */
		val2 = data->als_gain_milli data->als_it_ms;

		return IIO_VAL_FRACTIONAL;

		case IIO_DISTANCE:
		val = 0; / sensor reports mm, scale to meter */
		*val2 = 1000;

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