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@kernel.org> Assisted-by: LLM Signed-off-by: Rupesh Majhi <zoone.rupert@gmail.com> Signed-off-by: Jonathan Cameron <jonathan.cameron@oss.qualcomm.com>