[PATCH v2 6/8] iio: afe: rescale: add offset support
From: Liam Beguin <hidden>
Date: 2021-06-07 14:47:46
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> This is a preparatory change required for the addition of temperature sensing front ends. Signed-off-by: Liam Beguin <redacted> --- drivers/iio/afe/iio-rescale.c | 9 +++++++++ 1 file changed, 9 insertions(+)
diff --git a/drivers/iio/afe/iio-rescale.c b/drivers/iio/afe/iio-rescale.c
index e34148d39b39..3d445c76dbb2 100644
--- a/drivers/iio/afe/iio-rescale.c
+++ b/drivers/iio/afe/iio-rescale.c@@ -32,6 +32,7 @@ struct rescale { bool chan_processed; s32 numerator; s32 denominator; + s32 offset; }; static int rescale_read_raw(struct iio_dev *indio_dev,
@@ -86,6 +87,10 @@ static int rescale_read_raw(struct iio_dev *indio_dev, default: return -EOPNOTSUPP; } + case IIO_CHAN_INFO_OFFSET: + *val = rescale->offset; + + return IIO_VAL_INT; default: return -EINVAL; }
@@ -165,6 +170,9 @@ static int rescale_configure_channel(struct device *dev, chan->info_mask_separate = BIT(IIO_CHAN_INFO_RAW) | BIT(IIO_CHAN_INFO_SCALE); + if (rescale->offset) + chan->info_mask_separate |= BIT(IIO_CHAN_INFO_OFFSET); + /* * Using .read_avail() is fringe to begin with and makes no sense * whatsoever for processed channels, so we make sure that this cannot
@@ -329,6 +337,7 @@ static int rescale_probe(struct platform_device *pdev) rescale->cfg = of_device_get_match_data(dev); rescale->numerator = 1; rescale->denominator = 1; + rescale->offset = 0; ret = rescale->cfg->props(dev, rescale); if (ret)
--
2.30.1.489.g328c10930387