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Commit 5e06bdfb authored by Lars-Peter Clausen's avatar Lars-Peter Clausen Committed by Greg Kroah-Hartman
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staging:iio:dac:ad5446: Return cached value for 'raw' attribute 



We can not read back the value from the device, but we cache the value anyway so
we might as well return the cached value instead of an error.

Signed-off-by: default avatarLars-Peter Clausen <lars@metafoo.de>
Acked-by: default avatarJonathan Cameron <jic23@kernel.org>
Signed-off-by: default avatarGreg Kroah-Hartman <gregkh@linuxfoundation.org>
parent cae329e0

drivers/staging/iio/dac/ad5446.c

+3 −0
Original line number Diff line number Diff line
@@ -229,6 +229,9 @@ static int ad5446_read_raw(struct iio_dev *indio_dev, 
	unsigned long scale_uv;



	switch (m) {

	case IIO_CHAN_INFO_RAW:

		*val = st->cached_val;

		return IIO_VAL_INT;

	case IIO_CHAN_INFO_SCALE:

		scale_uv = (st->vref_mv * 1000) >> chan->scan_type.realbits;

		*val =  scale_uv / 1000;