ASoC: Constify struct snd_soc_codec_driver

Allow the CODEC driver structure to be marked const by making all
the APIs that use it do so.

Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
Acked-by: Liam Girdwood <lrg@slimlogic.co.uk>

include/sound/soc.h

@@ -265,7 +265,7 @@ int snd_soc_register_platform(struct device *dev,
 		struct snd_soc_platform_driver *platform_drv);
 void snd_soc_unregister_platform(struct device *dev);
 int snd_soc_register_codec(struct device *dev,
-		struct snd_soc_codec_driver *codec_drv,
+		const struct snd_soc_codec_driver *codec_drv,
 		struct snd_soc_dai_driver *dai_drv, int num_dai);
 void snd_soc_unregister_codec(struct device *dev);
 int snd_soc_codec_volatile_register(struct snd_soc_codec *codec, int reg);
@@ -453,7 +453,7 @@ struct snd_soc_codec {
 	const char *name_prefix;
 	int id;
 	struct device *dev;
-	struct snd_soc_codec_driver *driver;
+	const struct snd_soc_codec_driver *driver;
 
 	struct mutex mutex;
 	struct snd_soc_card *card;

sound/soc/soc-cache.c

@@ -1078,7 +1078,7 @@ static int snd_soc_lzo_decompress_cache_block(struct snd_soc_codec *codec,
 static inline int snd_soc_lzo_get_blkindex(struct snd_soc_codec *codec,
 		unsigned int reg)
 {
-	struct snd_soc_codec_driver *codec_drv;
+	const struct snd_soc_codec_driver *codec_drv;
 	size_t reg_size;
 
 	codec_drv = codec->driver;
@@ -1090,7 +1090,7 @@ static inline int snd_soc_lzo_get_blkindex(struct snd_soc_codec *codec,
 static inline int snd_soc_lzo_get_blkpos(struct snd_soc_codec *codec,
 		unsigned int reg)
 {
-	struct snd_soc_codec_driver *codec_drv;
+	const struct snd_soc_codec_driver *codec_drv;
 	size_t reg_size;
 
 	codec_drv = codec->driver;
@@ -1101,7 +1101,7 @@ static inline int snd_soc_lzo_get_blkpos(struct snd_soc_codec *codec,
 
 static inline int snd_soc_lzo_get_blksize(struct snd_soc_codec *codec)
 {
-	struct snd_soc_codec_driver *codec_drv;
+	const struct snd_soc_codec_driver *codec_drv;
 	size_t reg_size;
 
 	codec_drv = codec->driver;
@@ -1301,7 +1301,7 @@ static int snd_soc_lzo_cache_init(struct snd_soc_codec *codec)
 {
 	struct snd_soc_lzo_ctx **lzo_blocks;
 	size_t reg_size, bmp_size;
-	struct snd_soc_codec_driver *codec_drv;
+	const struct snd_soc_codec_driver *codec_drv;
 	int ret, tofree, i, blksize, blkcount;
 	const char *p, *end;
 	unsigned long *sync_bmp;
@@ -1404,7 +1404,7 @@ static int snd_soc_flat_cache_sync(struct snd_soc_codec *codec)
 {
 	int i;
 	int ret;
-	struct snd_soc_codec_driver *codec_drv;
+	const struct snd_soc_codec_driver *codec_drv;
 	unsigned int val;
 
 	codec_drv = codec->driver;
@@ -1504,7 +1504,7 @@ static int snd_soc_flat_cache_exit(struct snd_soc_codec *codec)
 
 static int snd_soc_flat_cache_init(struct snd_soc_codec *codec)
 {
-	struct snd_soc_codec_driver *codec_drv;
+	const struct snd_soc_codec_driver *codec_drv;
 	size_t reg_size;
 
 	codec_drv = codec->driver;

sound/soc/soc-core.c

@@ -3491,8 +3491,9 @@ static void fixup_codec_formats(struct snd_soc_pcm_stream *stream)
  * @codec: codec to register
  */
 int snd_soc_register_codec(struct device *dev,
-		struct snd_soc_codec_driver *codec_drv,
-		struct snd_soc_dai_driver *dai_drv, int num_dai)
+			   const struct snd_soc_codec_driver *codec_drv,
+			   struct snd_soc_dai_driver *dai_drv,
+			   int num_dai)
 {
 	size_t reg_size;
 	struct snd_soc_codec *codec;