[PATCH 5/5] iio: adc: ad4030: explain rearranging raw sample data

[David Lechner]

Add a comment explaining why the raw sample data is rearranged in the
in the ad4030_conversion() function. It is not so obvious from the code
why this is done.

Signed-off-by: David Lechner <dlechner@xxxxxxxxxxxx>
---
 drivers/iio/adc/ad4030.c | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/drivers/iio/adc/ad4030.c b/drivers/iio/adc/ad4030.c
index 54ad74b96c9f256a67848330f875379edc828b0b..636f9f33e66af73d102722b984dc1230e1417d1e 100644
--- a/drivers/iio/adc/ad4030.c
+++ b/drivers/iio/adc/ad4030.c
@@ -646,6 +646,12 @@ static int ad4030_conversion(struct iio_dev *indio_dev)
 					   &st->rx_data.dual.diff[0],
 					   &st->rx_data.dual.diff[1]);
 
+	/*
+	 * If no common mode voltage channel is enabled, we can use the raw
+	 * data as is. Otherwise, we need to rearrange the data a bit to match
+	 * the natural alignment of the IIO buffer.
+	 */
+
 	if (st->mode != AD4030_OUT_DATA_MD_16_DIFF_8_COM &&
 	    st->mode != AD4030_OUT_DATA_MD_24_DIFF_8_COM)
 		return 0;

-- 
2.43.0