[RFC] iio: multiplexer: Copy scan_type details from parent to child

[Chris Morgan <macroalpha82@gmail.com>]

From: Chris Morgan <macromorgan@hotmail.com>

Copy the scan_type details from the parent iio channel to the child.
The scan_type is otherwise empty and things like the storagebits are
zero (which causes a problem for the adc-joystick driver which
validates the storagebits when used through a mux). I'm submitting this
as an RFC because I'm not sure if this is the correct way to handle
this scenario (a driver that checks the storagebits used with the iio
multiplexer).

Signed-off-by: Chris Morgan <macromorgan@hotmail.com>
---
 drivers/iio/multiplexer/iio-mux.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/drivers/iio/multiplexer/iio-mux.c b/drivers/iio/multiplexer/iio-mux.c
index 93558fddfa9b..1de01ec878c4 100644
--- a/drivers/iio/multiplexer/iio-mux.c
+++ b/drivers/iio/multiplexer/iio-mux.c
@@ -322,6 +322,9 @@ static int mux_configure_channel(struct device *dev, struct mux *mux,
 	if (page)
 		devm_kfree(dev, page);
 
+	/* Copy scan type from parent to mux child. */
+	chan->scan_type = pchan->scan_type;
+
 	return 0;
 }
 
-- 
2.25.1