Added a of_device_id struct variable and subsequent call to
MODULE_DEVICE_TABLE macro to complete device-tree support for this
driver.

Signed-off-by: Marcelo Schmitt <marcelo.schmi...@gmail.com>
---
 drivers/staging/iio/impedance-analyzer/ad5933.c | 9 +++++++++
 1 file changed, 9 insertions(+)

diff --git a/drivers/staging/iio/impedance-analyzer/ad5933.c 
b/drivers/staging/iio/impedance-analyzer/ad5933.c
index edb8b540bbf1..19e8b6d2865c 100644
--- a/drivers/staging/iio/impedance-analyzer/ad5933.c
+++ b/drivers/staging/iio/impedance-analyzer/ad5933.c
@@ -771,9 +771,18 @@ static const struct i2c_device_id ad5933_id[] = {
 
 MODULE_DEVICE_TABLE(i2c, ad5933_id);
 
+static const struct of_device_id ad5933_of_match[] = {
+       { .compatible = "analog-devices,ad5933" },
+       { .compatible = "analog-devices,ad5934" },
+       { },
+};
+
+MODULE_DEVICE_TABLE(of, ad5933_of_match);
+
 static struct i2c_driver ad5933_driver = {
        .driver = {
                .name = "ad5933",
+               .of_match_table = ad5933_of_match,
        },
        .probe = ad5933_probe,
        .remove = ad5933_remove,
-- 
2.17.1

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