diff mbox series

[v2,5/8] iio: afe: rescale: add upstream offset support

Message ID 20210607144718.1724413-6-liambeguin@gmail.com (mailing list archive)
State Superseded, archived
Headers show
Series iio: afe: add temperature rescaling support | expand

Commit Message

Liam Beguin June 7, 2021, 2:47 p.m. UTC 
From: Liam Beguin <lvb@xiphos.com>

Default to using iio_read_channel_processed() if the upstream channel
exposes an offset.

When possible, it's preferable to avoid using
iio_read_channel_processed() to maintain as much precision as possible.

Signed-off-by: Liam Beguin <lvb@xiphos.com>
---
 drivers/iio/afe/iio-rescale.c | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)
diff mbox series

Patch

diff --git a/drivers/iio/afe/iio-rescale.c b/drivers/iio/afe/iio-rescale.c
index 774eb3044edd..e34148d39b39 100644
--- a/drivers/iio/afe/iio-rescale.c
+++ b/drivers/iio/afe/iio-rescale.c
@@ -148,7 +148,10 @@  static int rescale_configure_channel(struct device *dev,
 	chan->ext_info = rescale->ext_info;
 	chan->type = rescale->cfg->type;
 
-	if (iio_channel_has_info(schan, IIO_CHAN_INFO_RAW) ||
+	if (iio_channel_has_info(schan, IIO_CHAN_INFO_OFFSET)) {
+		dev_info(dev, "found upstream offset, using processed value\n");
+		rescale->chan_processed = true;
+	} else if (iio_channel_has_info(schan, IIO_CHAN_INFO_RAW) ||
 	    iio_channel_has_info(schan, IIO_CHAN_INFO_SCALE)) {
 		dev_info(dev, "using raw+scale source channel\n");
 	} else if (iio_channel_has_info(schan, IIO_CHAN_INFO_PROCESSED)) {