[PATCH v2 5/8] iio: afe: rescale: add upstream offset support
From: Liam Beguin <hidden>
Date: 2021-06-07 14:48:37
Also in:
linux-iio, lkml
Subsystem:
iio subsystem and drivers, iio unit converter, the rest · Maintainers:
Jonathan Cameron, Peter Rosin, Linus Torvalds
From: Liam Beguin <redacted> 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 <redacted> --- drivers/iio/afe/iio-rescale.c | 5 ++++- 1 file changed, 4 insertions(+), 1 deletion(-)
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)) {
--
2.30.1.489.g328c10930387