ASoC: bt-sco: Add devicetree support for bt-sco codec

Add devicetree support for bluetooth SCO link codec.
Signed-off-by: Marek Belisko <marek@goldelico.com>
Signed-off-by: Mark Brown <broonie@kernel.org>

Documentation/devicetree/bindings/sound/bt-sco.txt

+Bluetooth-SCO audio CODEC
+
+This device support generic Bluetooth SCO link.
+
+Required properties:
+
+  - compatible : "delta,dfbmcs320"
+
+Example:
+
+codec: bt_sco {
+	compatible = "delta,dfbmcs320";
+};

Documentation/devicetree/bindings/vendor-prefixes.txt

@@ -54,6 +54,7 @@ cosmic	Cosmic Circuits
 crystalfontz	Crystalfontz America, Inc.
 dallas	Maxim Integrated Products (formerly Dallas Semiconductor)
 davicom	DAVICOM Semiconductor, Inc.
+delta	Delta Electronics, Inc.
 denx	Denx Software Engineering
 digi	Digi International Inc.
 digilent	Diglent, Inc.

sound/soc/codecs/bt-sco.c

@@ -74,9 +74,18 @@ static const struct platform_device_id bt_sco_driver_ids[] = {
 };
 MODULE_DEVICE_TABLE(platform, bt_sco_driver_ids);
 
+#if defined(CONFIG_OF)
+static const struct of_device_id bt_sco_codec_of_match[] = {
+	{ .compatible = "delta,dfbmcs320", },
+	{},
+};
+MODULE_DEVICE_TABLE(of, bt_sco_codec_of_match);
+#endif
+
 static struct platform_driver bt_sco_driver = {
 	.driver = {
 		.name = "bt-sco",
+		.of_match_table = of_match_ptr(bt_sco_codec_of_match),
 	},
 	.probe = bt_sco_probe,
 	.remove = bt_sco_remove,