staging: iio: adc: ad7606: Add OF device ID table

The driver does not have a struct of_device_id table, but supported
devices are registered via Device Trees. This patch adds and OF device
ID table.
Signed-off-by: Stefan Popa <stefan.popa@analog.com>
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>

drivers/staging/iio/adc/ad7606_par.c

@@ -91,12 +91,22 @@ static const struct platform_device_id ad7606_driver_ids[] = {
 
 MODULE_DEVICE_TABLE(platform, ad7606_driver_ids);
 
+static const struct of_device_id ad7606_of_match[] = {
+	{ .compatible = "adi,ad7605-4" },
+	{ .compatible = "adi,ad7606-4" },
+	{ .compatible = "adi,ad7606-6" },
+	{ .compatible = "adi,ad7606-8" },
+	{ },
+};
+MODULE_DEVICE_TABLE(of, ad7606_of_match);
+
 static struct platform_driver ad7606_driver = {
 	.probe = ad7606_par_probe,
 	.id_table = ad7606_driver_ids,
 	.driver = {
 		.name	 = "ad7606",
 		.pm	 = AD7606_PM_OPS,
+		.of_match_table = ad7606_of_match,
 	},
 };
 

drivers/staging/iio/adc/ad7606_spi.c

@@ -58,9 +58,19 @@ static const struct spi_device_id ad7606_id[] = {
 };
 MODULE_DEVICE_TABLE(spi, ad7606_id);
 
+static const struct of_device_id ad7606_of_match[] = {
+	{ .compatible = "adi,ad7605-4" },
+	{ .compatible = "adi,ad7606-4" },
+	{ .compatible = "adi,ad7606-6" },
+	{ .compatible = "adi,ad7606-8" },
+	{ },
+};
+MODULE_DEVICE_TABLE(of, ad7606_of_match);
+
 static struct spi_driver ad7606_driver = {
 	.driver = {
 		.name = "ad7606",
+		.of_match_table = ad7606_of_match,
 		.pm = AD7606_PM_OPS,
 	},
 	.probe = ad7606_spi_probe,