Commit e0f0ddad authored by Jonathan Cameron's avatar Jonathan Cameron Committed by Greg Kroah-Hartman
Browse files

staging:iio:adc:ad7192 scrap read from buffer for sysfs access. 



No known use case and complicates in kernel interface work.

Signed-off-by: default avatarJonathan Cameron <jic23@kernel.org>
Acked-by: default avatarLars-Peter Clausen <lars@metafoo.de>
Signed-off-by: default avatarGreg Kroah-Hartman <gregkh@suse.de>
parent 443a9ea5

drivers/staging/iio/adc/ad7192.c

+1 −21
Original line number Diff line number Diff line
@@ -453,25 +453,6 @@ static int ad7192_setup(struct ad7192_state *st) 
	return ret;

}



static int ad7192_scan_from_ring(struct ad7192_state *st, unsigned ch, int *val)

{

	struct iio_buffer *ring = iio_priv_to_dev(st)->buffer;

	int ret;

	s64 dat64[2];

	u32 *dat32 = (u32 *)dat64;



	if (!(test_bit(ch, ring->scan_mask)))

		return  -EBUSY;



	ret = ring->access->read_last(ring, (u8 *) &dat64);

	if (ret)

		return ret;



	*val = *dat32;



	return 0;

}



static int ad7192_ring_preenable(struct iio_dev *indio_dev)

{

	struct ad7192_state *st = iio_priv(indio_dev);
@@ -875,8 +856,7 @@ static int ad7192_read_raw(struct iio_dev *indio_dev, 
	case 0:

		mutex_lock(&indio_dev->mlock);

		if (iio_buffer_enabled(indio_dev))

			ret = ad7192_scan_from_ring(st,

					chan->scan_index, &smpl);

			ret = -EBUSY;

		else

			ret = ad7192_read(st, chan->address,

					chan->scan_type.realbits / 8, &smpl);