---

yaml
---
r: 257604
b: refs/heads/master
c: 7d02173
h: refs/heads/master
v: v3

[refs]

@@ -1,2 +1,2 @@
 ---
-refs/heads/master: ca1004bab9c6829e64036f7da5e25a698756ee28
+refs/heads/master: 7d02173cd17a1ac3db04aa9b9e5de153f2d02dd5

trunk/sound/soc/codecs/wm8994.c

@@ -2299,6 +2299,33 @@ static int wm8994_aif3_hw_params(struct snd_pcm_substream *substream,
 	return snd_soc_update_bits(codec, aif1_reg, WM8994_AIF1_WL_MASK, aif1);
 }
 
+static void wm8994_aif_shutdown(struct snd_pcm_substream *substream,
+				struct snd_soc_dai *dai)
+{
+	struct snd_soc_codec *codec = dai->codec;
+	int rate_reg = 0;
+
+	switch (dai->id) {
+	case 1:
+		rate_reg = WM8994_AIF1_RATE;
+		break;
+	case 2:
+		rate_reg = WM8994_AIF1_RATE;
+		break;
+	default:
+		break;
+	}
+
+	/* If the DAI is idle then configure the divider tree for the
+	 * lowest output rate to save a little power if the clock is
+	 * still active (eg, because it is system clock).
+	 */
+	if (rate_reg && !dai->playback_active && !dai->capture_active)
+		snd_soc_update_bits(codec, rate_reg,
+				    WM8994_AIF1_SR_MASK |
+				    WM8994_AIF1CLK_RATE_MASK, 0x9);
+}
+
 static int wm8994_aif_mute(struct snd_soc_dai *codec_dai, int mute)
 {
 	struct snd_soc_codec *codec = codec_dai->codec;
@@ -2365,6 +2392,7 @@ static struct snd_soc_dai_ops wm8994_aif1_dai_ops = {
 	.set_sysclk	= wm8994_set_dai_sysclk,
 	.set_fmt	= wm8994_set_dai_fmt,
 	.hw_params	= wm8994_hw_params,
+	.shutdown	= wm8994_aif_shutdown,
 	.digital_mute	= wm8994_aif_mute,
 	.set_pll	= wm8994_set_fll,
 	.set_tristate	= wm8994_set_tristate,
@@ -2374,6 +2402,7 @@ static struct snd_soc_dai_ops wm8994_aif2_dai_ops = {
 	.set_sysclk	= wm8994_set_dai_sysclk,
 	.set_fmt	= wm8994_set_dai_fmt,
 	.hw_params	= wm8994_hw_params,
+	.shutdown	= wm8994_aif_shutdown,
 	.digital_mute   = wm8994_aif_mute,
 	.set_pll	= wm8994_set_fll,
 	.set_tristate	= wm8994_set_tristate,