ASoC: remove codec reg_cache

Codec reg_cache is legacy feature, almost all driver are now using
common regmap, and very few driver had been used this legacy feature.
Because of this background, it is now implemented on each
driver internally now.
So now, no one is using codec reg_cache. Let's remove it.

Signed-off-by: Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>
Reviewed-by: Charles Keepax <ckeepax@opensource.wolfsonmicro.com>
Signed-off-by: Mark Brown <broonie@kernel.org>

1 files changed, 0 insertions, 53 deletions

diff --git a/sound/soc/soc-cache.c b/sound/soc/soc-cache.c
deleted file mode 100644
index 07f43356f963..000000000000
--- a/sound/soc/soc-cache.c
+++ /dev/null
@@ -1,53 +0,0 @@
-/*
- * 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;
-}