[Feature]add MT2731_MP2_MR2_SVN388 baseline version

Change-Id: Ief04314834b31e27effab435d3ca8ba33b499059
diff --git a/src/kernel/linux/v4.14/sound/soc/codecs/ssm2602-spi.c b/src/kernel/linux/v4.14/sound/soc/codecs/ssm2602-spi.c
new file mode 100644
index 0000000..842f373
--- /dev/null
+++ b/src/kernel/linux/v4.14/sound/soc/codecs/ssm2602-spi.c
@@ -0,0 +1,47 @@
+/*
+ * SSM2602 SPI audio driver
+ *
+ * Copyright 2014 Analog Devices Inc.
+ *
+ * Licensed under the GPL-2.
+ */
+
+#include <linux/module.h>
+#include <linux/spi/spi.h>
+#include <linux/regmap.h>
+
+#include <sound/soc.h>
+
+#include "ssm2602.h"
+
+static int ssm2602_spi_probe(struct spi_device *spi)
+{
+	return ssm2602_probe(&spi->dev, SSM2602,
+		devm_regmap_init_spi(spi, &ssm2602_regmap_config));
+}
+
+static int ssm2602_spi_remove(struct spi_device *spi)
+{
+	snd_soc_unregister_codec(&spi->dev);
+	return 0;
+}
+
+static const struct of_device_id ssm2602_of_match[] = {
+	{ .compatible = "adi,ssm2602", },
+	{ }
+};
+MODULE_DEVICE_TABLE(of, ssm2602_of_match);
+
+static struct spi_driver ssm2602_spi_driver = {
+	.driver = {
+		.name	= "ssm2602",
+		.of_match_table = ssm2602_of_match,
+	},
+	.probe		= ssm2602_spi_probe,
+	.remove		= ssm2602_spi_remove,
+};
+module_spi_driver(ssm2602_spi_driver);
+
+MODULE_DESCRIPTION("ASoC SSM2602 SPI driver");
+MODULE_AUTHOR("Cliff Cai");
+MODULE_LICENSE("GPL");