ASoC: wm8994: Don't bother lowering clock dividers inside idle AIFs

This increases the chances we'll manage to hit a partially configured
state on restart and the power savings are extremely small.

Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>

diff --git a/sound/soc/codecs/wm8994.c b/sound/soc/codecs/wm8994.c
index 317159eec44c76d03b87110e4e4094d8d2064333..c9af13f14331f23458a7a62787ede1cb3ee5facf 100644 (file)
--- a/sound/soc/codecs/wm8994.c
+++ b/sound/soc/codecs/wm8994.c
@@ -2623,33 +2623,6 @@ 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_AIF2_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;
@@ -2731,7 +2704,6 @@ static const 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,
@@ -2741,7 +2713,6 @@ static const 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,