staging: iio: Add stubs for iio_ring_buffer_[un]register and equivalent driver stubs
Signed-off-by: Jonathan Cameron <jic23@cam.ac.uk>
Acked-by: Barry Song <21cnbao@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
diff --git a/drivers/staging/iio/ring_generic.h b/drivers/staging/iio/ring_generic.h
index 0e44375..dbf11e1 100644
--- a/drivers/staging/iio/ring_generic.h
+++ b/drivers/staging/iio/ring_generic.h
@@ -11,6 +11,8 @@
#define _IIO_RING_GENERIC_H_
#include "iio.h"
+#ifdef CONFIG_IIO_RING_BUFFER
+
struct iio_handler;
struct iio_ring_buffer;
struct iio_dev;
@@ -287,5 +289,14 @@
#define IIO_RING_ENABLE_ATTR DEVICE_ATTR(ring_enable, S_IRUGO | S_IWUSR, \
iio_show_ring_enable, \
iio_store_ring_enable)
+#else /* CONFIG_IIO_RING_BUFFER */
+static inline int iio_ring_buffer_register(struct iio_ring_buffer *ring, int id)
+{
+ return 0;
+};
+static inline void iio_ring_buffer_unregister(struct iio_ring_buffer *ring)
+{};
+
+#endif /* CONFIG_IIO_RING_BUFFER */
#endif /* _IIO_RING_GENERIC_H_ */