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-rw-r--r--tools/iio/iio_utils.h15
1 files changed, 9 insertions, 6 deletions
diff --git a/tools/iio/iio_utils.h b/tools/iio/iio_utils.h
index e5eb46ade0a3..379eed9deaea 100644
--- a/tools/iio/iio_utils.h
+++ b/tools/iio/iio_utils.h
@@ -63,12 +63,15 @@ void bsort_channel_array_by_index(struct iio_channel_info **ci_array, int cnt);
int build_channel_array(const char *device_dir,
struct iio_channel_info **ci_array, int *counter);
int find_type_by_name(const char *name, const char *type);
-int write_sysfs_int(char *filename, char *basedir, int val);
-int write_sysfs_int_and_verify(char *filename, char *basedir, int val);
-int write_sysfs_string_and_verify(char *filename, char *basedir, char *val);
-int write_sysfs_string(char *filename, char *basedir, char *val);
-int read_sysfs_posint(char *filename, char *basedir);
-int read_sysfs_float(char *filename, char *basedir, float *val);
+int write_sysfs_int(const char *filename, const char *basedir, int val);
+int write_sysfs_int_and_verify(const char *filename, const char *basedir,
+ int val);
+int write_sysfs_string_and_verify(const char *filename, const char *basedir,
+ const char *val);
+int write_sysfs_string(const char *filename, const char *basedir,
+ const char *val);
+int read_sysfs_posint(const char *filename, const char *basedir);
+int read_sysfs_float(const char *filename, const char *basedir, float *val);
int read_sysfs_string(const char *filename, const char *basedir, char *str);
#endif /* _IIO_UTILS_H_ */