[PATCH v7 06/10] iio: core: add an accessor for scan_timestamp

[Rupesh Majhi]

indio_dev->scan_timestamp is __private, so a driver has no way to ask
whether the timestamp channel is in the current scan. Hide the
ACCESS_PRIVATE() behind a read-only helper, the way iio_get_masklength()
already does.

The dps310 FIFO patch later in this series is the first user: that
hardware does not timestamp entries, so it refuses a buffer with the
timestamp channel enabled.

Suggested-by: Jonathan Cameron <jic23@xxxxxxxxxx>
Assisted-by: LLM
Signed-off-by: Rupesh Majhi <zoone.rupert@xxxxxxxxx>
---
 include/linux/iio/iio.h | 9 +++++++++
 1 file changed, 9 insertions(+)

diff --git a/include/linux/iio/iio.h b/include/linux/iio/iio.h
index 989c1db8fb36..a893e36be988 100644
--- a/include/linux/iio/iio.h
+++ b/include/linux/iio/iio.h
@@ -1083,6 +1083,15 @@ static inline unsigned int iio_get_masklength(const struct iio_dev *indio_dev)
 	return ACCESS_PRIVATE(indio_dev, masklength);
 }
 
+/**
+ * iio_scan_timestamp_enabled - Is the timestamp channel in the current scan
+ * @indio_dev: the IIO device to check
+ */
+static inline bool iio_scan_timestamp_enabled(const struct iio_dev *indio_dev)
+{
+	return ACCESS_PRIVATE(indio_dev, scan_timestamp);
+}
+
 int iio_active_scan_mask_index(struct iio_dev *indio_dev);
 
 /**
-- 
2.43.0