[PATCH v2 3/3] iio: adc: ad9467: check for backend capabilities

[Tomas Melin]

For cases when the backend does not support test patterns or calibration,
do not attempt to use those features.

Signed-off-by: Tomas Melin <tomas.melin@xxxxxxxxxxx>
---
 drivers/iio/adc/ad9467.c | 9 +++++++++
 1 file changed, 9 insertions(+)

diff --git a/drivers/iio/adc/ad9467.c b/drivers/iio/adc/ad9467.c
index 9cfe66425d4e91e215cccc40e24a92c5e99e9b87..ce7dde8b79540bb0eabfba9470b3984e8723d4b7 100644
--- a/drivers/iio/adc/ad9467.c
+++ b/drivers/iio/adc/ad9467.c
@@ -645,6 +645,9 @@ static int ad9467_backend_testmode_on(struct ad9467_state *st,
 	};
 	int ret;
 
+	if (!iio_backend_caps(st->back, IIO_BACKEND_CAP_TEST_PATTERNS))
+		return 0;
+
 	ret = iio_backend_data_format_set(st->back, chan, &data);
 	if (ret)
 		return ret;
@@ -665,6 +668,9 @@ static int ad9467_backend_testmode_off(struct ad9467_state *st,
 	};
 	int ret;
 
+	if (!iio_backend_caps(st->back, IIO_BACKEND_CAP_TEST_PATTERNS))
+		return 0;
+
 	ret = iio_backend_chan_disable(st->back, chan);
 	if (ret)
 		return ret;
@@ -807,6 +813,9 @@ static int ad9467_calibrate(struct ad9467_state *st)
 	bool invert = false, stat;
 	int ret;
 
+	if (!iio_backend_caps(st->back, IIO_BACKEND_CAP_CALIBRATION))
+		return 0;
+
 	/* all points invalid */
 	bitmap_fill(st->calib_map, st->calib_map_size);
 

-- 
2.47.3