ASoC: twl6040: Select LPPLL during standby

When the codec is in standby we do not need to keep the HPPLL active.
Signed-off-by: NPeter Ujfalusi <peter.ujfalusi@ti.com>
Signed-off-by: NMark Brown <broonie@kernel.org>

sound/soc/codecs/twl6040.c

@@ -824,7 +824,7 @@ static int twl6040_set_bias_level(struct snd_soc_codec *codec,
 {
 	struct twl6040 *twl6040 = codec->control_data;
 	struct twl6040_data *priv = snd_soc_codec_get_drvdata(codec);
-	int ret;
+	int ret = 0;
 
 	switch (level) {
 	case SND_SOC_BIAS_ON:
@@ -832,12 +832,16 @@ static int twl6040_set_bias_level(struct snd_soc_codec *codec,
 	case SND_SOC_BIAS_PREPARE:
 		break;
 	case SND_SOC_BIAS_STANDBY:
-		if (priv->codec_powered)
+		if (priv->codec_powered) {
+			/* Select low power PLL in standby */
+			ret = twl6040_set_pll(twl6040, TWL6040_SYSCLK_SEL_LPPLL,
+					      32768, 19200000);
 			break;
+		}
 
 		ret = twl6040_power(twl6040, 1);
 		if (ret)
-			return ret;
+			break;
 
 		priv->codec_powered = 1;
 
@@ -853,7 +857,7 @@ static int twl6040_set_bias_level(struct snd_soc_codec *codec,
 		break;
 	}
 
-	return 0;
+	return ret;
 }
 
 static int twl6040_startup(struct snd_pcm_substream *substream,