ASoC: tlv320aic32x4: Use snd_soc_update_bits for read-modify-write

Use snd_soc_update_bits for read-modify-write register access instead of
open-coding it using snd_soc_read and snd_soc_write.
Signed-off-by: Axel Lin <axel.lin@gmail.com>
Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>

sound/soc/codecs/tlv320aic32x4.c

@@ -528,40 +528,33 @@ static int aic32x4_set_bias_level(struct snd_soc_codec *codec,
 				  enum snd_soc_bias_level level)
 {
 	struct aic32x4_priv *aic32x4 = snd_soc_codec_get_drvdata(codec);
-	u8 value;
 
 	switch (level) {
 	case SND_SOC_BIAS_ON:
 		if (aic32x4->master) {
 			/* Switch on PLL */
-			value = snd_soc_read(codec, AIC32X4_PLLPR);
-			snd_soc_write(codec, AIC32X4_PLLPR,
-				      (value | AIC32X4_PLLEN));
+			snd_soc_update_bits(codec, AIC32X4_PLLPR,
+					    AIC32X4_PLLEN, AIC32X4_PLLEN);
 
 			/* Switch on NDAC Divider */
-			value = snd_soc_read(codec, AIC32X4_NDAC);
-			snd_soc_write(codec, AIC32X4_NDAC,
-				      value | AIC32X4_NDACEN);
+			snd_soc_update_bits(codec, AIC32X4_NDAC,
+					    AIC32X4_NDACEN, AIC32X4_NDACEN);
 
 			/* Switch on MDAC Divider */
-			value = snd_soc_read(codec, AIC32X4_MDAC);
-			snd_soc_write(codec, AIC32X4_MDAC,
-				      value | AIC32X4_MDACEN);
+			snd_soc_update_bits(codec, AIC32X4_MDAC,
+					    AIC32X4_MDACEN, AIC32X4_MDACEN);
 
 			/* Switch on NADC Divider */
-			value = snd_soc_read(codec, AIC32X4_NADC);
-			snd_soc_write(codec, AIC32X4_NADC,
-				      value | AIC32X4_MDACEN);
+			snd_soc_update_bits(codec, AIC32X4_NADC,
+					    AIC32X4_NADCEN, AIC32X4_NADCEN);
 
 			/* Switch on MADC Divider */
-			value = snd_soc_read(codec, AIC32X4_MADC);
-			snd_soc_write(codec, AIC32X4_MADC,
-				      value | AIC32X4_MDACEN);
+			snd_soc_update_bits(codec, AIC32X4_MADC,
+					    AIC32X4_MADCEN, AIC32X4_MADCEN);
 
 			/* Switch on BCLK_N Divider */
-			value = snd_soc_read(codec, AIC32X4_BCLKN);
-			snd_soc_write(codec, AIC32X4_BCLKN,
-				      value | AIC32X4_BCLKEN);
+			snd_soc_update_bits(codec, AIC32X4_BCLKN,
+					    AIC32X4_BCLKEN, AIC32X4_BCLKEN);
 		}
 		break;
 	case SND_SOC_BIAS_PREPARE:
@@ -569,34 +562,28 @@ static int aic32x4_set_bias_level(struct snd_soc_codec *codec,
 	case SND_SOC_BIAS_STANDBY:
 		if (aic32x4->master) {
 			/* Switch off PLL */
-			value = snd_soc_read(codec, AIC32X4_PLLPR);
-			snd_soc_write(codec, AIC32X4_PLLPR,
-				      (value & ~AIC32X4_PLLEN));
+			snd_soc_update_bits(codec, AIC32X4_PLLPR,
+					    AIC32X4_PLLEN, 0);
 
 			/* Switch off NDAC Divider */
-			value = snd_soc_read(codec, AIC32X4_NDAC);
-			snd_soc_write(codec, AIC32X4_NDAC,
-				      value & ~AIC32X4_NDACEN);
+			snd_soc_update_bits(codec, AIC32X4_NDAC,
+					    AIC32X4_NDACEN, 0);
 
 			/* Switch off MDAC Divider */
-			value = snd_soc_read(codec, AIC32X4_MDAC);
-			snd_soc_write(codec, AIC32X4_MDAC,
-				      value & ~AIC32X4_MDACEN);
+			snd_soc_update_bits(codec, AIC32X4_MDAC,
+					    AIC32X4_MDACEN, 0);
 
 			/* Switch off NADC Divider */
-			value = snd_soc_read(codec, AIC32X4_NADC);
-			snd_soc_write(codec, AIC32X4_NADC,
-				      value & ~AIC32X4_NDACEN);
+			snd_soc_update_bits(codec, AIC32X4_NADC,
+					    AIC32X4_NADCEN, 0);
 
 			/* Switch off MADC Divider */
-			value = snd_soc_read(codec, AIC32X4_MADC);
-			snd_soc_write(codec, AIC32X4_MADC,
-				      value & ~AIC32X4_MDACEN);
-			value = snd_soc_read(codec, AIC32X4_BCLKN);
+			snd_soc_update_bits(codec, AIC32X4_MADC,
+					    AIC32X4_MADCEN, 0);
 
 			/* Switch off BCLK_N Divider */
-			snd_soc_write(codec, AIC32X4_BCLKN,
-				      value & ~AIC32X4_BCLKEN);
+			snd_soc_update_bits(codec, AIC32X4_BCLKN,
+					    AIC32X4_BCLKEN, 0);
 		}
 		break;
 	case SND_SOC_BIAS_OFF: