staging: iio: ad7192: create of_device_id array

Create list of compatible device ids to be matched with those stated in
the device tree.
Signed-off-by: Bárbara Fernandes <barbara.fernandes@usp.br>
Signed-off-by: Wilson Sales <spoonm@spoonm.org>
Co-developed by: Wilson Sales <spoonm@spoonm.org>
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>

drivers/staging/iio/adc/ad7192.c

@@ -809,11 +809,23 @@ static const struct spi_device_id ad7192_id[] = {
 	{"ad7195", ID_AD7195},
 	{}
 };
+
 MODULE_DEVICE_TABLE(spi, ad7192_id);
 
+static const struct of_device_id ad7192_of_match[] = {
+	{ .compatible = "adi,ad7190" },
+	{ .compatible = "adi,ad7192" },
+	{ .compatible = "adi,ad7193" },
+	{ .compatible = "adi,ad7195" },
+	{}
+};
+
+MODULE_DEVICE_TABLE(of, ad7192_of_match);
+
 static struct spi_driver ad7192_driver = {
 	.driver = {
 		.name	= "ad7192",
+		.of_match_table = ad7192_of_match,
 	},
 	.probe		= ad7192_probe,
 	.remove		= ad7192_remove,