iio/adc: (lp8788) Provide OF node information to iio device

Signed-off-by: NGuenter Roeck <linux@roeck-us.net>
Signed-off-by: NJonathan Cameron <jic23@kernel.org>

drivers/iio/adc/lp8788_adc.c

@@ -208,6 +208,7 @@ static int lp8788_adc_probe(struct platform_device *pdev)
 	adc->lp = lp;
 	platform_set_drvdata(pdev, indio_dev);
 
+	indio_dev->dev.of_node = pdev->dev.of_node;
 	ret = lp8788_iio_map_register(indio_dev, lp->pdata, adc);
 	if (ret)
 		goto err_iio_map;