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ASoC: Refactor WM8731 regulator management into bias management 

This allows more flexible integration with subsystem features.

Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
Acked-by: Liam Girdwood <lrg@slimlogic.co.uk>
This commit is contained in:
Mark Brown 2010-05-07 19:14:45 +01:00
parent 3efab7dcc0
commit 06ae99888e
1 changed files with 28 additions and 23 deletions
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51
sound/soc/codecs/wm8731.c
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@ -368,6 +368,10 @@ static int wm8731_set_dai_fmt(struct snd_soc_dai *codec_dai,
static int wm8731_set_bias_level(struct snd_soc_codec *codec,
enum snd_soc_bias_level level)
{
struct wm8731_priv *wm8731 = snd_soc_codec_get_drvdata(codec);
int i, ret;
u8 data[2];
u16 *cache = codec->reg_cache;
u16 reg;
switch (level) {
@ -376,6 +380,24 @@ static int wm8731_set_bias_level(struct snd_soc_codec *codec,
case SND_SOC_BIAS_PREPARE:
break;
case SND_SOC_BIAS_STANDBY:
if (codec->bias_level == SND_SOC_BIAS_OFF) {
ret = regulator_bulk_enable(ARRAY_SIZE(wm8731->supplies),
wm8731->supplies);
if (ret != 0)
return ret;
/* Sync reg_cache with the hardware */
for (i = 0; i < ARRAY_SIZE(wm8731_reg); i++) {
if (cache[i] == wm8731_reg[i])
continue;
data[0] = (i << 1) | ((cache[i] >> 8)
& 0x0001);
data[1] = cache[i] & 0x00ff;
codec->hw_write(codec->control_data, data, 2);
}
}
/* Clear PWROFF, gate CLKOUT, everything else as-is */
reg = snd_soc_read(codec, WM8731_PWR) & 0xff7f;
snd_soc_write(codec, WM8731_PWR, reg | 0x0040);
@ -383,6 +405,8 @@ static int wm8731_set_bias_level(struct snd_soc_codec *codec,
case SND_SOC_BIAS_OFF:
snd_soc_write(codec, WM8731_ACTIVE, 0x0);
snd_soc_write(codec, WM8731_PWR, 0xffff);
regulator_bulk_disable(ARRAY_SIZE(wm8731->supplies),
wm8731->supplies);
break;
}
codec->bias_level = level;
@ -427,12 +451,9 @@ static int wm8731_suspend(struct platform_device *pdev, pm_message_t state)
{
struct snd_soc_device *socdev = platform_get_drvdata(pdev);
struct snd_soc_codec *codec = socdev->card->codec;
struct wm8731_priv *wm8731 = snd_soc_codec_get_drvdata(codec);
snd_soc_write(codec, WM8731_ACTIVE, 0x0);
wm8731_set_bias_level(codec, SND_SOC_BIAS_OFF);
regulator_bulk_disable(ARRAY_SIZE(wm8731->supplies),
wm8731->supplies);
return 0;
}
@ -440,25 +461,7 @@ static int wm8731_resume(struct platform_device *pdev)
{
struct snd_soc_device *socdev = platform_get_drvdata(pdev);
struct snd_soc_codec *codec = socdev->card->codec;
struct wm8731_priv *wm8731 = snd_soc_codec_get_drvdata(codec);
int i, ret;
u8 data[2];
u16 *cache = codec->reg_cache;
ret = regulator_bulk_enable(ARRAY_SIZE(wm8731->supplies),
wm8731->supplies);
if (ret != 0)
return ret;
/* Sync reg_cache with the hardware */
for (i = 0; i < ARRAY_SIZE(wm8731_reg); i++) {
if (cache[i] == wm8731_reg[i])
continue;
data[0] = (i << 1) | ((cache[i] >> 8) & 0x0001);
data[1] = cache[i] & 0x00ff;
codec->hw_write(codec->control_data, data, 2);
}
wm8731_set_bias_level(codec, SND_SOC_BIAS_STANDBY);
return 0;
@ -603,6 +606,9 @@ static int wm8731_register(struct wm8731_priv *wm8731,
goto err_codec;
}
/* Regulators will have been enabled by bias management */
regulator_bulk_disable(ARRAY_SIZE(wm8731->supplies), wm8731->supplies);
return 0;
err_codec:
@ -621,7 +627,6 @@ static void wm8731_unregister(struct wm8731_priv *wm8731)
wm8731_set_bias_level(&wm8731->codec, SND_SOC_BIAS_OFF);
snd_soc_unregister_dai(&wm8731_dai);
snd_soc_unregister_codec(&wm8731->codec);
regulator_bulk_disable(ARRAY_SIZE(wm8731->supplies), wm8731->supplies);
regulator_bulk_free(ARRAY_SIZE(wm8731->supplies), wm8731->supplies);
kfree(wm8731);
wm8731_codec = NULL;