iio: buffer: Allocate standard attributes in the core
All buffers want at least the length and the enable attribute. Move the
creation of those attributes to the core instead of having to do this in
each individual buffer implementation. This allows us to get rid of some
boiler-plate code.
Signed-off-by: Lars-Peter Clausen <lars@metafoo.de>
Signed-off-by: Jonathan Cameron <jic23@kernel.org>
diff --git a/include/linux/iio/buffer.h b/include/linux/iio/buffer.h
index 79cdb3d..16b7663 100644
--- a/include/linux/iio/buffer.h
+++ b/include/linux/iio/buffer.h
@@ -83,10 +83,11 @@
bool scan_timestamp;
const struct iio_buffer_access_funcs *access;
struct list_head scan_el_dev_attr_list;
+ struct attribute_group buffer_group;
struct attribute_group scan_el_group;
wait_queue_head_t pollq;
bool stufftoread;
- const struct attribute_group *attrs;
+ const struct attribute **attrs;
struct list_head demux_list;
void *demux_bounce;
struct list_head buffer_list;
@@ -148,40 +149,6 @@
int iio_update_demux(struct iio_dev *indio_dev);
-/**
- * iio_buffer_read_length() - attr func to get number of datums in the buffer
- **/
-ssize_t iio_buffer_read_length(struct device *dev,
- struct device_attribute *attr,
- char *buf);
-/**
- * iio_buffer_write_length() - attr func to set number of datums in the buffer
- **/
-ssize_t iio_buffer_write_length(struct device *dev,
- struct device_attribute *attr,
- const char *buf,
- size_t len);
-/**
- * iio_buffer_store_enable() - attr to turn the buffer on
- **/
-ssize_t iio_buffer_store_enable(struct device *dev,
- struct device_attribute *attr,
- const char *buf,
- size_t len);
-/**
- * iio_buffer_show_enable() - attr to see if the buffer is on
- **/
-ssize_t iio_buffer_show_enable(struct device *dev,
- struct device_attribute *attr,
- char *buf);
-#define IIO_BUFFER_LENGTH_ATTR DEVICE_ATTR(length, S_IRUGO | S_IWUSR, \
- iio_buffer_read_length, \
- iio_buffer_write_length)
-
-#define IIO_BUFFER_ENABLE_ATTR DEVICE_ATTR(enable, S_IRUGO | S_IWUSR, \
- iio_buffer_show_enable, \
- iio_buffer_store_enable)
-
bool iio_validate_scan_mask_onehot(struct iio_dev *indio_dev,
const unsigned long *mask);