ASoC: Remove snd_soc_cache_sync() implementation

This function has no more non regmap user, which means we can remove the
implementation of the function and associated functions and structure
fields.

For convenience we keep a static inline version of the function that
forwards calls to regcache_sync() unconditionally.

Signed-off-by: Lars-Peter Clausen <lars@metafoo.de>
Signed-off-by: Mark Brown <broonie@kernel.org>

1 files changed, 0 insertions, 152 deletions

diff --git a/sound/soc/soc-cache.c b/sound/soc/soc-cache.c
index 6dab81799b9a..07f43356f963 100644
--- a/sound/soc/soc-cache.c
+++ b/sound/soc/soc-cache.c
@@ -15,56 +15,6 @@
 #include <linux/export.h>
 #include <linux/slab.h>
 
-#include <trace/events/asoc.h>
-
-static bool snd_soc_set_cache_val(void *base, unsigned int idx,
-                                  unsigned int val, unsigned int word_size)
-{
-        switch (word_size) {
-        case 1: {
-                u8 *cache = base;
-                if (cache[idx] == val)
-                        return true;
-                cache[idx] = val;
-                break;
-        }
-        case 2: {
-                u16 *cache = base;
-                if (cache[idx] == val)
-                        return true;
-                cache[idx] = val;
-                break;
-        }
-        default:
-                WARN(1, "Invalid word_size %d\n", word_size);
-                break;
-        }
-        return false;
-}
-
-static unsigned int snd_soc_get_cache_val(const void *base, unsigned int idx,
-                unsigned int word_size)
-{
-        if (!base)
-                return -1;
-
-        switch (word_size) {
-        case 1: {
-                const u8 *cache = base;
-                return cache[idx];
-        }
-        case 2: {
-                const u16 *cache = base;
-                return cache[idx];
-        }
-        default:
-                WARN(1, "Invalid word_size %d\n", word_size);
-                break;
-        }
-        /* unreachable */
-        return -1;
-}
-
 int snd_soc_cache_init(struct snd_soc_codec *codec)
 {
         const struct snd_soc_codec_driver *codec_drv = codec->driver;
@@ -75,8 +25,6 @@ int snd_soc_cache_init(struct snd_soc_codec *codec)
         if (!reg_size)
                 return 0;
 
-        mutex_init(&codec->cache_rw_mutex);
-
         dev_dbg(codec->dev, "ASoC: Initializing cache for %s codec\n",
                                 codec->component.name);
 
@@ -103,103 +51,3 @@ int snd_soc_cache_exit(struct snd_soc_codec *codec)
         codec->reg_cache = NULL;
         return 0;
 }
-
-/**
- * snd_soc_cache_read: Fetch the value of a given register from the cache.
- *
- * @codec: CODEC to configure.
- * @reg: The register index.
- * @value: The value to be returned.
- */
-int snd_soc_cache_read(struct snd_soc_codec *codec,
-                       unsigned int reg, unsigned int *value)
-{
-        if (!value)
-                return -EINVAL;
-
-        mutex_lock(&codec->cache_rw_mutex);
-        if (!ZERO_OR_NULL_PTR(codec->reg_cache))
-                *value = snd_soc_get_cache_val(codec->reg_cache, reg,
-                                               codec->driver->reg_word_size);
-        mutex_unlock(&codec->cache_rw_mutex);
-
-        return 0;
-}
-EXPORT_SYMBOL_GPL(snd_soc_cache_read);
-
-/**
- * snd_soc_cache_write: Set the value of a given register in the cache.
- *
- * @codec: CODEC to configure.
- * @reg: The register index.
- * @value: The new register value.
- */
-int snd_soc_cache_write(struct snd_soc_codec *codec,
-                        unsigned int reg, unsigned int value)
-{
-        mutex_lock(&codec->cache_rw_mutex);
-        if (!ZERO_OR_NULL_PTR(codec->reg_cache))
-                snd_soc_set_cache_val(codec->reg_cache, reg, value,
-                                      codec->driver->reg_word_size);
-        mutex_unlock(&codec->cache_rw_mutex);
-
-        return 0;
-}
-EXPORT_SYMBOL_GPL(snd_soc_cache_write);
-
-static int snd_soc_flat_cache_sync(struct snd_soc_codec *codec)
-{
-        int i;
-        int ret;
-        const struct snd_soc_codec_driver *codec_drv;
-        unsigned int val;
-
-        codec_drv = codec->driver;
-        for (i = 0; i < codec_drv->reg_cache_size; ++i) {
-                ret = snd_soc_cache_read(codec, i, &val);
-                if (ret)
-                        return ret;
-                if (codec_drv->reg_cache_default)
-                        if (snd_soc_get_cache_val(codec_drv->reg_cache_default,
-                                                  i, codec_drv->reg_word_size) == val)
-                                continue;
-
-                ret = snd_soc_write(codec, i, val);
-                if (ret)
-                        return ret;
-                dev_dbg(codec->dev, "ASoC: Synced register %#x, value = %#x\n",
-                        i, val);
-        }
-        return 0;
-}
-
-/**
- * snd_soc_cache_sync: Sync the register cache with the hardware.
- *
- * @codec: CODEC to configure.
- *
- * Any registers that should not be synced should be marked as
- * volatile.  In general drivers can choose not to use the provided
- * syncing functionality if they so require.
- */
-int snd_soc_cache_sync(struct snd_soc_codec *codec)
-{
-        const char *name = "flat";
-        int ret;
-
-        if (codec->component.regmap)
-                return regcache_sync(codec->component.regmap);
-
-        if (!codec->cache_sync)
-                return 0;
-
-        dev_dbg(codec->dev, "ASoC: Syncing cache for %s codec\n",
-                codec->component.name);
-        trace_snd_soc_cache_sync(codec, name, "start");
-        ret = snd_soc_flat_cache_sync(codec);
-        if (!ret)
-                codec->cache_sync = 0;
-        trace_snd_soc_cache_sync(codec, name, "end");
-        return ret;
-}
-EXPORT_SYMBOL_GPL(snd_soc_cache_sync);