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

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>

diff --git a/drivers/staging/iio/adc/ad7476.h b/drivers/staging/iio/adc/ad7476.h
index 6014292..27f696c 100644 (file)
--- a/drivers/staging/iio/adc/ad7476.h
+++ b/drivers/staging/iio/adc/ad7476.h
@@ -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)

diff --git a/drivers/staging/iio/adc/ad7476_core.c b/drivers/staging/iio/adc/ad7476_core.c
index a42dd19..be02979 100644 (file)
--- a/drivers/staging/iio/adc/ad7476_core.c
+++ b/drivers/staging/iio/adc/ad7476_core.c
@@ -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);

diff --git a/drivers/staging/iio/adc/ad7476_ring.c b/drivers/staging/iio/adc/ad7476_ring.c
index ff0656a..4e298b2 100644 (file)
--- a/drivers/staging/iio/adc/ad7476_ring.c
+++ b/drivers/staging/iio/adc/ad7476_ring.c
@@ -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
  *