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authorMark Brown <broonie@opensource.wolfsonmicro.com>2012-02-12 18:37:03 +0000
committerMark Brown <broonie@opensource.wolfsonmicro.com>2012-02-14 18:13:06 -0800
commitda157875cd6f3f282b9404e35d1507d8bbbd4c34 (patch)
tree46c7a7f90da8eed5f0139430299f0743601c0eb2 /sound
parent68fcde97e42af0ddd4a3665aeec0f5286577f0b5 (diff)
downloadop-kernel-dev-da157875cd6f3f282b9404e35d1507d8bbbd4c34.zip
op-kernel-dev-da157875cd6f3f282b9404e35d1507d8bbbd4c34.tar.gz
ASoC: wm9081: Use idle_bias_off
The main role of the WM9081 is as a class D speaker amplifier so there is no concern about pops. There are also very few registers and a fast power up time so we can happily mark the driver as idle_bias_off. Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
Diffstat (limited to 'sound')
-rw-r--r--sound/soc/codecs/wm9081.c35
1 files changed, 10 insertions, 25 deletions
diff --git a/sound/soc/codecs/wm9081.c b/sound/soc/codecs/wm9081.c
index c4b3fd9..076c126 100644
--- a/sound/soc/codecs/wm9081.c
+++ b/sound/soc/codecs/wm9081.c
@@ -824,6 +824,8 @@ static const struct snd_soc_dapm_route wm9081_audio_paths[] = {
static int wm9081_set_bias_level(struct snd_soc_codec *codec,
enum snd_soc_bias_level level)
{
+ struct wm9081_priv *wm9081 = snd_soc_codec_get_drvdata(codec);
+
switch (level) {
case SND_SOC_BIAS_ON:
break;
@@ -841,6 +843,9 @@ static int wm9081_set_bias_level(struct snd_soc_codec *codec,
case SND_SOC_BIAS_STANDBY:
/* Initial cold start */
if (codec->dapm.bias_level == SND_SOC_BIAS_OFF) {
+ regcache_cache_only(wm9081->regmap, false);
+ regcache_sync(wm9081->regmap);
+
/* Disable LINEOUT discharge */
snd_soc_update_bits(codec, WM9081_ANTI_POP_CONTROL,
WM9081_LINEOUT_DISCH, 0);
@@ -892,6 +897,8 @@ static int wm9081_set_bias_level(struct snd_soc_codec *codec,
snd_soc_update_bits(codec, WM9081_ANTI_POP_CONTROL,
WM9081_LINEOUT_DISCH,
WM9081_LINEOUT_DISCH);
+
+ regcache_cache_only(wm9081->regmap, true);
break;
}
@@ -1289,38 +1296,15 @@ static int wm9081_remove(struct snd_soc_codec *codec)
return 0;
}
-#ifdef CONFIG_PM
-static int wm9081_suspend(struct snd_soc_codec *codec)
-{
- wm9081_set_bias_level(codec, SND_SOC_BIAS_OFF);
-
- return 0;
-}
-
-static int wm9081_resume(struct snd_soc_codec *codec)
-{
- struct wm9081_priv *wm9081 = snd_soc_codec_get_drvdata(codec);
-
- regcache_sync(wm9081->regmap);
-
- wm9081_set_bias_level(codec, SND_SOC_BIAS_STANDBY);
-
- return 0;
-}
-#else
-#define wm9081_suspend NULL
-#define wm9081_resume NULL
-#endif
-
static struct snd_soc_codec_driver soc_codec_dev_wm9081 = {
.probe = wm9081_probe,
.remove = wm9081_remove,
- .suspend = wm9081_suspend,
- .resume = wm9081_resume,
.set_sysclk = wm9081_set_sysclk,
.set_bias_level = wm9081_set_bias_level,
+ .idle_bias_off = true,
+
.controls = wm9081_snd_controls,
.num_controls = ARRAY_SIZE(wm9081_snd_controls),
.dapm_widgets = wm9081_dapm_widgets,
@@ -1392,6 +1376,7 @@ static __devinit int wm9081_i2c_probe(struct i2c_client *i2c,
regmap_update_bits(wm9081->regmap, WM9081_INTERRUPT_CONTROL,
WM9081_IRQ_POL | WM9081_IRQ_OP_CTRL, reg);
+ regcache_cache_only(wm9081->regmap, true);
ret = snd_soc_register_codec(&i2c->dev,
&soc_codec_dev_wm9081, &wm9081_dai, 1);
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