[Feature]add MT2731_MP2_MR2_SVN388 baseline version
Change-Id: Ief04314834b31e27effab435d3ca8ba33b499059
diff --git a/src/kernel/linux/v4.14/sound/soc/soc-cache.c b/src/kernel/linux/v4.14/sound/soc/soc-cache.c
new file mode 100644
index 0000000..07f4335
--- /dev/null
+++ b/src/kernel/linux/v4.14/sound/soc/soc-cache.c
@@ -0,0 +1,53 @@
+/*
+ * soc-cache.c -- ASoC register cache helpers
+ *
+ * Copyright 2009 Wolfson Microelectronics PLC.
+ *
+ * Author: Mark Brown <broonie@opensource.wolfsonmicro.com>
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License as published by the
+ * Free Software Foundation; either version 2 of the License, or (at your
+ * option) any later version.
+ */
+
+#include <sound/soc.h>
+#include <linux/export.h>
+#include <linux/slab.h>
+
+int snd_soc_cache_init(struct snd_soc_codec *codec)
+{
+ const struct snd_soc_codec_driver *codec_drv = codec->driver;
+ size_t reg_size;
+
+ reg_size = codec_drv->reg_cache_size * codec_drv->reg_word_size;
+
+ if (!reg_size)
+ return 0;
+
+ dev_dbg(codec->dev, "ASoC: Initializing cache for %s codec\n",
+ codec->component.name);
+
+ if (codec_drv->reg_cache_default)
+ codec->reg_cache = kmemdup(codec_drv->reg_cache_default,
+ reg_size, GFP_KERNEL);
+ else
+ codec->reg_cache = kzalloc(reg_size, GFP_KERNEL);
+ if (!codec->reg_cache)
+ return -ENOMEM;
+
+ return 0;
+}
+
+/*
+ * NOTE: keep in mind that this function might be called
+ * multiple times.
+ */
+int snd_soc_cache_exit(struct snd_soc_codec *codec)
+{
+ dev_dbg(codec->dev, "ASoC: Destroying cache for %s codec\n",
+ codec->component.name);
+ kfree(codec->reg_cache);
+ codec->reg_cache = NULL;
+ return 0;
+}