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staging:iio:adc:ad7606 remove buffer access for sysfs interfaces.

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No known use case and complicates in kernel interface work.

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>
This commit is contained in:
Jonathan Cameron 2011-12-05 22:18:20 +00:00 committed by Greg Kroah-Hartman
parent 389ac48833
commit 78c32ed39e
3 changed files with 1 additions and 30 deletions
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5
drivers/staging/iio/adc/ad7476.h
View file

@ -50,14 +50,9 @@ enum ad7476_supported_device_ids {
};
#ifdef CONFIG_IIO_BUFFER
int ad7476_scan_from_ring(struct iio_dev *indio_dev);
int ad7476_register_ring_funcs_and_init(struct iio_dev *indio_dev);
void ad7476_ring_cleanup(struct iio_dev *indio_dev);
#else /* CONFIG_IIO_BUFFER */
static inline int ad7476_scan_from_ring(struct iio_dev *indio_dev)
{
return 0;
}
static inline int
ad7476_register_ring_funcs_and_init(struct iio_dev *indio_dev)

2
drivers/staging/iio/adc/ad7476_core.c
View file

@ -46,7 +46,7 @@ static int ad7476_read_raw(struct iio_dev *indio_dev,
case 0:
mutex_lock(&indio_dev->mlock);
if (iio_buffer_enabled(indio_dev))
ret = ad7476_scan_from_ring(indio_dev);
ret = -EBUSY;
else
ret = ad7476_scan_direct(st);
mutex_unlock(&indio_dev->mlock);

24
drivers/staging/iio/adc/ad7476_ring.c
View file

@ -20,30 +20,6 @@
#include "ad7476.h"
int ad7476_scan_from_ring(struct iio_dev *indio_dev)
{
struct iio_buffer *ring = indio_dev->buffer;
int ret;
u8 *ring_data;
ring_data = kmalloc(ring->access->get_bytes_per_datum(ring),
GFP_KERNEL);
if (ring_data == NULL) {
ret = -ENOMEM;
goto error_ret;
}
ret = ring->access->read_last(ring, ring_data);
if (ret)
goto error_free_ring_data;
ret = (ring_data[0] << 8) | ring_data[1];
error_free_ring_data:
kfree(ring_data);
error_ret:
return ret;
}
/**
* ad7476_ring_preenable() setup the parameters of the ring before enabling
*