iio:imu:adis: Add debugfs register access support

Provide a IIO debugfs register access function for the ADIS library. This
function can be used by individual drivers to allow raw register access via
debugfs.

Signed-off-by: Lars-Peter Clausen <lars@metafoo.de>
Signed-off-by: Jonathan Cameron <jic23@kernel.org>

1 files changed, 11 insertions, 0 deletions

diff --git a/include/linux/iio/imu/adis.h b/include/linux/iio/imu/adis.h
index 8c3304d44b97..fce7bc3ba0b5 100644
--- a/include/linux/iio/imu/adis.h
+++ b/include/linux/iio/imu/adis.h
@@ -183,4 +183,15 @@ static inline void adis_remove_trigger(struct adis *adis)
 
 #endif /* CONFIG_IIO_BUFFER */
 
+#ifdef CONFIG_DEBUG_FS
+
+int adis_debugfs_reg_access(struct iio_dev *indio_dev,
+        unsigned int reg, unsigned int writeval, unsigned int *readval);
+
+#else
+
+#define adis_debugfs_reg_access NULL
+
+#endif
+
 #endif