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staging:iio:adc:ad7476 scrap read from buffer for sysfs access. 

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 22:18:19 +00:00 committed by Greg Kroah-Hartman
parent e0f0ddad80
commit 389ac48833
3 changed files with 2 additions and 40 deletions
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5
drivers/staging/iio/adc/ad7298.h
View File

@ -54,14 +54,9 @@ struct ad7298_state {
};
#ifdef CONFIG_IIO_BUFFER
int ad7298_scan_from_ring(struct iio_dev *indio_dev, long ch);
int ad7298_register_ring_funcs_and_init(struct iio_dev *indio_dev);
void ad7298_ring_cleanup(struct iio_dev *indio_dev);
#else /* CONFIG_IIO_BUFFER */
static inline int ad7298_scan_from_ring(struct iio_dev *indio_dev, long ch)
{
return 0;
}
static inline int
ad7298_register_ring_funcs_and_init(struct iio_dev *indio_dev)

8
drivers/staging/iio/adc/ad7298_core.c
View File

@ -123,12 +123,8 @@ static int ad7298_read_raw(struct iio_dev *indio_dev,
switch (m) {
case 0:
mutex_lock(&indio_dev->mlock);
if (iio_buffer_enabled(indio_dev)) {
if (chan->address == AD7298_CH_TEMP)
ret = -ENODEV;
else
ret = ad7298_scan_from_ring(indio_dev,
chan->address);
if (indio_dev->currentmode == INDIO_BUFFER_TRIGGERED) {
ret = -EBUSY;
} else {
if (chan->address == AD7298_CH_TEMP)
ret = ad7298_scan_temp(st, val);

29
drivers/staging/iio/adc/ad7298_ring.c
View File

@ -18,35 +18,6 @@
#include "ad7298.h"
int ad7298_scan_from_ring(struct iio_dev *indio_dev, long ch)
{
struct iio_buffer *ring = indio_dev->buffer;
int ret;
u16 *ring_data;
if (!(test_bit(ch, ring->scan_mask))) {
ret = -EBUSY;
goto error_ret;
}
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, (u8 *) ring_data);
if (ret)
goto error_free_ring_data;
ret = be16_to_cpu(ring_data[ch]);
error_free_ring_data:
kfree(ring_data);
error_ret:
return ret;
}
/**
* ad7298_ring_preenable() setup the parameters of the ring before enabling
*