ASoC: use internal reg_cache on tlv320dac33

Codec reg_cache is legacy feature and very few driver only are using
it. But, ALSA SoC framework needs to support it.
Codec will be merged into Component in the future, so, let's remove
legacy and unused feature from framework.
This patch implements ALSA SoC reg_cache feature into driver,
and don't use  ALSA SoC framework's feature.
Signed-off-by: Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>
Signed-off-by: Mark Brown <broonie@kernel.org>

sound/soc/codecs/tlv320dac33.c

@@ -106,6 +106,7 @@ struct tlv320dac33_priv {
 	int mode1_latency;		/* latency caused by the i2c writes in
 					 * us */
 	u8 burst_bclkdiv;		/* BCLK divider value in burst mode */
+	u8 *reg_cache;
 	unsigned int burst_rate;	/* Interface speed in Burst modes */
 
 	int keep_bclk;			/* Keep the BCLK continuously running
@@ -173,7 +174,8 @@ static const u8 dac33_reg[DAC33_CACHEREGNUM] = {
 static inline unsigned int dac33_read_reg_cache(struct snd_soc_codec *codec,
 						unsigned reg)
 {
-	u8 *cache = codec->reg_cache;
+	struct tlv320dac33_priv *dac33 = snd_soc_codec_get_drvdata(codec);
+	u8 *cache = dac33->reg_cache;
 	if (reg >= DAC33_CACHEREGNUM)
 		return 0;
 
@@ -183,7 +185,8 @@ static inline unsigned int dac33_read_reg_cache(struct snd_soc_codec *codec,
 static inline void dac33_write_reg_cache(struct snd_soc_codec *codec,
 					 u8 reg, u8 value)
 {
-	u8 *cache = codec->reg_cache;
+	struct tlv320dac33_priv *dac33 = snd_soc_codec_get_drvdata(codec);
+	u8 *cache = dac33->reg_cache;
 	if (reg >= DAC33_CACHEREGNUM)
 		return;
 
@@ -243,19 +246,6 @@ static int dac33_write(struct snd_soc_codec *codec, unsigned int reg,
 	return ret;
 }
 
-static int dac33_write_locked(struct snd_soc_codec *codec, unsigned int reg,
-		       unsigned int value)
-{
-	struct tlv320dac33_priv *dac33 = snd_soc_codec_get_drvdata(codec);
-	int ret;
-
-	mutex_lock(&dac33->mutex);
-	ret = dac33_write(codec, reg, value);
-	mutex_unlock(&dac33->mutex);
-
-	return ret;
-}
-
 #define DAC33_I2C_ADDR_AUTOINC	0x80
 static int dac33_write16(struct snd_soc_codec *codec, unsigned int reg,
 		       unsigned int value)
@@ -1432,13 +1422,9 @@ static int dac33_soc_remove(struct snd_soc_codec *codec)
 }
 
 static const struct snd_soc_codec_driver soc_codec_dev_tlv320dac33 = {
-	.read = dac33_read_reg_cache,
-	.write = dac33_write_locked,
 	.set_bias_level = dac33_set_bias_level,
 	.idle_bias_off = true,
-	.reg_cache_size = ARRAY_SIZE(dac33_reg),
-	.reg_word_size = sizeof(u8),
-	.reg_cache_default = dac33_reg,
+
 	.probe = dac33_soc_probe,
 	.remove = dac33_soc_remove,
 
@@ -1497,6 +1483,13 @@ static int dac33_i2c_probe(struct i2c_client *client,
 	if (dac33 == NULL)
 		return -ENOMEM;
 
+	dac33->reg_cache = devm_kmemdup(&client->dev,
+					dac33_reg,
+					ARRAY_SIZE(dac33_reg) * sizeof(u8),
+					GFP_KERNEL);
+	if (!dac33->reg_cache)
+		return -ENOMEM;
+
 	dac33->i2c = client;
 	mutex_init(&dac33->mutex);
 	spin_lock_init(&dac33->lock);