Implement write_raw by converting the value if writing the scale, or just calling the managed channel driver's write_raw otherwise. Signed-off-by: Paul Cercueil <paul@xxxxxxxxxxxxxxx> --- drivers/iio/afe/iio-rescale.c | 22 ++++++++++++++++++++++ 1 file changed, 22 insertions(+) diff --git a/drivers/iio/afe/iio-rescale.c b/drivers/iio/afe/iio-rescale.c index 5c9970b93384..0edb62ee4508 100644 --- a/drivers/iio/afe/iio-rescale.c +++ b/drivers/iio/afe/iio-rescale.c @@ -141,6 +141,27 @@ int rescale_process_offset(struct rescale *rescale, int scale_type, } } +static int rescale_write_raw(struct iio_dev *indio_dev, + struct iio_chan_spec const *chan, + int val, int val2, long mask) +{ + struct rescale *rescale = iio_priv(indio_dev); + unsigned long long tmp; + + switch (mask) { + case IIO_CHAN_INFO_SCALE: + tmp = val * 1000000000LL; + do_div(tmp, rescale->numerator); + tmp *= rescale->denominator; + do_div(tmp, 1000000000LL); + return iio_write_channel_attribute(rescale->source, tmp, 0, + IIO_CHAN_INFO_SCALE); + default: + return iio_write_channel_attribute(rescale->source, + val, val2, mask); + } +} + static int rescale_read_raw(struct iio_dev *indio_dev, struct iio_chan_spec const *chan, int *val, int *val2, long mask) @@ -250,6 +271,7 @@ static int rescale_read_avail(struct iio_dev *indio_dev, } static const struct iio_info rescale_info = { + .write_raw = rescale_write_raw, .read_raw = rescale_read_raw, .read_avail = rescale_read_avail, }; -- 2.35.1