ASoC: uda134x: Use regmap_update_bits() were appropriate

Instead of doing the read-modify-update cycle by hand when updating a
register use regmap_update_bits().

This also means we can now remove uda134x_read_reg_cache() and
uda134x_write() since they are unused.
Signed-off-by: Lars-Peter Clausen <lars@metafoo.de>
Signed-off-by: Mark Brown <broonie@kernel.org>

sound/soc/codecs/uda134x.c

@@ -60,31 +60,6 @@ static const struct reg_default uda134x_reg_defaults[] = {
 	{ UDA134X_DATA1, 0x00 },
 };
 
-/*
- * The codec has no support for reading its registers except for peak level...
- */
-static inline unsigned int uda134x_read_reg_cache(struct snd_soc_codec *codec,
-	unsigned int reg)
-{
-	struct uda134x_priv *uda134x = snd_soc_codec_get_drvdata(codec);
-	unsigned int val;
-	int ret;
-
-	ret = regmap_read(uda134x->regmap, reg, &val);
-	if (ret)
-		return -1;
-
-	return val;
-}
-
-static void uda134x_write(struct snd_soc_codec *codec, unsigned int reg,
-	unsigned int val)
-{
-	struct uda134x_priv *uda134x = snd_soc_codec_get_drvdata(codec);
-
-	regmap_write(uda134x->regmap, reg, val);
-}
-
 /*
  * Write to the uda134x registers
  *
@@ -137,27 +112,28 @@ static int uda134x_regmap_write(void *context, unsigned int reg,
 
 static inline void uda134x_reset(struct snd_soc_codec *codec)
 {
-	u8 reset_reg = uda134x_read_reg_cache(codec, UDA134X_STATUS0);
-	uda134x_write(codec, UDA134X_STATUS0, reset_reg | (1<<6));
+	struct uda134x_priv *uda134x = snd_soc_codec_get_drvdata(codec);
+	unsigned int mask = 1<<6;
+
+	regmap_update_bits(uda134x->regmap, UDA134X_STATUS0, mask, mask);
 	msleep(1);
-	uda134x_write(codec, UDA134X_STATUS0, reset_reg & ~(1<<6));
+	regmap_update_bits(uda134x->regmap, UDA134X_STATUS0, mask, 0);
 }
 
 static int uda134x_mute(struct snd_soc_dai *dai, int mute)
 {
-	struct snd_soc_codec *codec = dai->codec;
-	u8 mute_reg = uda134x_read_reg_cache(codec, UDA134X_DATA010);
+	struct uda134x_priv *uda134x = snd_soc_codec_get_drvdata(dai->codec);
+	unsigned int mask = 1<<2;
+	unsigned int val;
 
 	pr_debug("%s mute: %d\n", __func__, mute);
 
 	if (mute)
-		mute_reg |= (1<<2);
+		val = mask;
 	else
-		mute_reg &= ~(1<<2);
-
-	uda134x_write(codec, UDA134X_DATA010, mute_reg);
+		val = 0;
 
-	return 0;
+	return regmap_update_bits(uda134x->regmap, UDA134X_DATA010, mask, val);
 }
 
 static int uda134x_startup(struct snd_pcm_substream *substream,
@@ -209,7 +185,7 @@ static int uda134x_hw_params(struct snd_pcm_substream *substream,
 {
 	struct snd_soc_codec *codec = dai->codec;
 	struct uda134x_priv *uda134x = snd_soc_codec_get_drvdata(codec);
-	u8 hw_params;
+	unsigned int hw_params = 0;
 
 	if (substream == uda134x->slave_substream) {
 		pr_debug("%s ignoring hw_params for slave substream\n",
@@ -217,10 +193,6 @@ static int uda134x_hw_params(struct snd_pcm_substream *substream,
 		return 0;
 	}
 
-	hw_params = uda134x_read_reg_cache(codec, UDA134X_STATUS0);
-	hw_params &= STATUS0_SYSCLK_MASK;
-	hw_params &= STATUS0_DAIFMT_MASK;
-
 	pr_debug("%s sysclk: %d, rate:%d\n", __func__,
 		 uda134x->sysclk, params_rate(params));
 
@@ -271,9 +243,8 @@ static int uda134x_hw_params(struct snd_pcm_substream *substream,
 		return -EINVAL;
 	}
 
-	uda134x_write(codec, UDA134X_STATUS0, hw_params);
-
-	return 0;
+	return regmap_update_bits(uda134x->regmap, UDA134X_STATUS0,
+		STATUS0_SYSCLK_MASK | STATUS0_DAIFMT_MASK, hw_params);
 }
 
 static int uda134x_set_dai_sysclk(struct snd_soc_dai *codec_dai,