iio: dac: ad9739a: add backend debugfs interface

Call iio_backend_debugfs_add() to add (if available) the backend debug
interface.

Signed-off-by: Nuno Sa <nuno.sa@analog.com>
Link: https://patch.msgid.link/20240806-dev-backend-dac-direct-reg-access-v1-2-b84a6e8ee8a0@analog.com
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>

diff --git a/drivers/iio/dac/ad9739a.c b/drivers/iio/dac/ad9739a.c
index 799387f21b9f3c04baa3a9555f1965bb060360a7..615d1a196db335c4427eff69fca269ad14753c9a 100644 (file)
--- a/drivers/iio/dac/ad9739a.c
+++ b/drivers/iio/dac/ad9739a.c
@@ -431,7 +431,13 @@ static int ad9739a_probe(struct spi_device *spi)
        indio_dev->num_channels = ARRAY_SIZE(ad9739a_channels);
        indio_dev->setup_ops = &ad9739a_buffer_setup_ops;
 
-       return devm_iio_device_register(&spi->dev, indio_dev);
+       ret = devm_iio_device_register(&spi->dev, indio_dev);
+       if (ret)
+               return ret;
+
+       iio_backend_debugfs_add(st->back, indio_dev);
+
+       return 0;
 }
 
 static const struct of_device_id ad9739a_of_match[] = {