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iio: iio_push_to_buffers(): Change type of 'data' to const void *

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Change the type of the 'data' parameter for iio_push_to_buffers() from 'u8 *' to
'const void *'. Drivers typically use the correct type (e.g. __be16 *) for their
data buffer. When passing the buffer to iio_push_to_buffers() it needs to be
cast to 'u8 *' for the compiler to not complain (and also having to add __force
if we want to keep sparse happy as well). Since the buffer implementation should
not care about the data layout (except the size of one sample) using a void
pointer is the correct thing to do. Also make it const as the buffer
implementations are not supposed to modify it.

Signed-off-by: Lars-Peter Clausen <lars@metafoo.de>
Signed-off-by: Jonathan Cameron <jic23@kernel.org>
This commit is contained in:
Lars-Peter Clausen
2013-09-15 17:50:00 +01:00
committed by Jonathan Cameron
parent c7a22c3680
commit 5d65d92045
5 changed files with 13 additions and 13 deletions
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6
include/linux/iio/buffer.h
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@@ -36,7 +36,7 @@ struct iio_buffer;
* any of them not existing.
**/
struct iio_buffer_access_funcs {
int (*store_to)(struct iio_buffer *buffer, u8 *data);
int (*store_to)(struct iio_buffer *buffer, const void *data);
int (*read_first_n)(struct iio_buffer *buffer,
size_t n,
char __user *buf);
@@ -81,7 +81,7 @@ struct iio_buffer {
bool stufftoread;
const struct attribute_group *attrs;
struct list_head demux_list;
unsigned char *demux_bounce;
void *demux_bounce;
struct list_head buffer_list;
};
@@ -120,7 +120,7 @@ int iio_scan_mask_set(struct iio_dev *indio_dev,
* @indio_dev: iio_dev structure for device.
* @data: Full scan.
*/
int iio_push_to_buffers(struct iio_dev *indio_dev, unsigned char *data);
int iio_push_to_buffers(struct iio_dev *indio_dev, const void *data);
int iio_update_demux(struct iio_dev *indio_dev);