2 files changed, 7 insertions, 0 deletions

diff --git a/drivers/iio/industrialio-core.c b/drivers/iio/industrialio-core.c
index 0499330d6e98..6eb24dbc081e 100644
--- a/drivers/iio/industrialio-core.c
+++ b/drivers/iio/industrialio-core.c
@@ -366,6 +366,7 @@ static ssize_t iio_read_channel_info(struct device *dev,
 {
         struct iio_dev *indio_dev = dev_to_iio_dev(dev);
         struct iio_dev_attr *this_attr = to_iio_dev_attr(attr);
+        unsigned long long tmp;
         int val, val2;
         bool scale_db = false;
         int ret = indio_dev->info->read_raw(indio_dev, this_attr->c,
@@ -391,6 +392,11 @@ static ssize_t iio_read_channel_info(struct device *dev,
                         return sprintf(buf, "-%d.%09u\n", val, -val2);
                 else
                         return sprintf(buf, "%d.%09u\n", val, val2);
+        case IIO_VAL_FRACTIONAL:
+                tmp = div_s64((s64)val * 1000000000LL, val2);
+                val2 = do_div(tmp, 1000000000LL);
+                val = tmp;
+                return sprintf(buf, "%d.%09u\n", val, val2);
         default:
                 return 0;
         }
diff --git a/include/linux/iio/types.h b/include/linux/iio/types.h
index 44e397705d7f..5c647ecfd5ba 100644
--- a/include/linux/iio/types.h
+++ b/include/linux/iio/types.h
@@ -57,5 +57,6 @@ enum iio_modifier {
 #define IIO_VAL_INT_PLUS_MICRO 2
 #define IIO_VAL_INT_PLUS_NANO 3
 #define IIO_VAL_INT_PLUS_MICRO_DB 4
+#define IIO_VAL_FRACTIONAL 10
 
 #endif /* _IIO_TYPES_H_ */