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staging:iio:adc:ad7993 stop reading from buffer for sysfs raw read.
No known usecase and makes in kernel interface work more complex. Signed-off-by: Jonathan Cameron <jic23@kernel.org> Acked-by: Lars-Peter Clausen <lars@metafoo.de> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
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@ -316,25 +316,6 @@ static int ad7793_setup(struct ad7793_state *st)
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return ret;
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}
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static int ad7793_scan_from_ring(struct ad7793_state *st, unsigned ch, int *val)
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{
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struct iio_buffer *ring = iio_priv_to_dev(st)->buffer;
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int ret;
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s64 dat64[2];
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u32 *dat32 = (u32 *)dat64;
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if (!(test_bit(ch, ring->scan_mask)))
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return -EBUSY;
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ret = ring->access->read_last(ring, (u8 *) &dat64);
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if (ret)
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return ret;
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*val = *dat32;
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return 0;
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}
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static int ad7793_ring_preenable(struct iio_dev *indio_dev)
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{
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struct ad7793_state *st = iio_priv(indio_dev);
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@ -650,8 +631,7 @@ static int ad7793_read_raw(struct iio_dev *indio_dev,
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case 0:
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mutex_lock(&indio_dev->mlock);
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if (iio_buffer_enabled(indio_dev))
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ret = ad7793_scan_from_ring(st,
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chan->scan_index, &smpl);
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ret = -EBUSY;
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else
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ret = ad7793_read(st, chan->address,
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chan->scan_type.realbits / 8, &smpl);
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