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ASoC: max9867: Fix power management

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Implement set_bias_level to drive shutdown bit, so device is
put to sleep when unused.

Signed-off-by: Ladislav Michl <ladis@linux-mips.org>
Signed-off-by: Mark Brown <broonie@kernel.org>
This commit is contained in:
Ladislav Michl 2018-12-04 19:19:51 +01:00 committed by Mark Brown
parent 8efc1afd7e
commit 29f58ff067
No known key found for this signature in database
GPG Key ID: 24D68B725D5487D0
2 changed files with 46 additions and 28 deletions
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72
sound/soc/codecs/max9867.c
View File

@ -248,17 +248,6 @@ static int max9867_dai_hw_params(struct snd_pcm_substream *substream,
return 0;
}
static int max9867_prepare(struct snd_pcm_substream *substream,
struct snd_soc_dai *dai)
{
struct snd_soc_component *component = dai->component;
struct max9867_priv *max9867 = snd_soc_component_get_drvdata(component);
regmap_update_bits(max9867->regmap, MAX9867_PWRMAN,
MAX9867_SHTDOWN_MASK, MAX9867_SHTDOWN_MASK);
return 0;
}
static int max9867_mute(struct snd_soc_dai *dai, int mute)
{
struct snd_soc_component *component = dai->component;
@ -361,7 +350,6 @@ static int max9867_dai_set_fmt(struct snd_soc_dai *codec_dai,
static const struct snd_soc_dai_ops max9867_dai_ops = {
.set_fmt = max9867_dai_set_fmt,
.set_sysclk = max9867_set_dai_sysclk,
.prepare = max9867_prepare,
.digital_mute = max9867_mute,
.hw_params = max9867_dai_hw_params,
};
@ -392,27 +380,59 @@ static struct snd_soc_dai_driver max9867_dai[] = {
}
};
#ifdef CONFIG_PM_SLEEP
static int max9867_suspend(struct device *dev)
#ifdef CONFIG_PM
static int max9867_suspend(struct snd_soc_component *component)
{
struct max9867_priv *max9867 = dev_get_drvdata(dev);
snd_soc_component_force_bias_level(component, SND_SOC_BIAS_OFF);
/* Drop down to power saving mode when system is suspended */
regmap_update_bits(max9867->regmap, MAX9867_PWRMAN,
MAX9867_SHTDOWN_MASK, ~MAX9867_SHTDOWN_MASK);
return 0;
}
static int max9867_resume(struct device *dev)
static int max9867_resume(struct snd_soc_component *component)
{
struct max9867_priv *max9867 = dev_get_drvdata(dev);
snd_soc_component_force_bias_level(component, SND_SOC_BIAS_STANDBY);
regmap_update_bits(max9867->regmap, MAX9867_PWRMAN,
MAX9867_SHTDOWN_MASK, MAX9867_SHTDOWN_MASK);
return 0;
}
#else
#define max9867_suspend NULL
#define max9867_resume NULL
#endif
static int max9867_set_bias_level(struct snd_soc_component *component,
enum snd_soc_bias_level level)
{
int err;
struct max9867_priv *max9867 = snd_soc_component_get_drvdata(component);
switch (level) {
case SND_SOC_BIAS_STANDBY:
if (snd_soc_component_get_bias_level(component) == SND_SOC_BIAS_OFF) {
err = regcache_sync(max9867->regmap);
if (err)
return err;
err = regmap_update_bits(max9867->regmap, MAX9867_PWRMAN,
MAX9867_SHTDOWN, MAX9867_SHTDOWN);
if (err)
return err;
}
break;
case SND_SOC_BIAS_OFF:
err = regmap_update_bits(max9867->regmap, MAX9867_PWRMAN,
MAX9867_SHTDOWN, 0);
if (err)
return err;
regcache_mark_dirty(max9867->regmap);
break;
default:
break;
}
return 0;
}
static const struct snd_soc_component_driver max9867_component = {
.controls = max9867_snd_controls,
.num_controls = ARRAY_SIZE(max9867_snd_controls),
@ -420,6 +440,9 @@ static const struct snd_soc_component_driver max9867_component = {
.num_dapm_routes = ARRAY_SIZE(max9867_audio_map),
.dapm_widgets = max9867_dapm_widgets,
.num_dapm_widgets = ARRAY_SIZE(max9867_dapm_widgets),
.suspend = max9867_suspend,
.resume = max9867_resume,
.set_bias_level = max9867_set_bias_level,
.idle_bias_on = 1,
.use_pmdown_time = 1,
.endianness = 1,
@ -514,15 +537,10 @@ static const struct of_device_id max9867_of_match[] = {
};
MODULE_DEVICE_TABLE(of, max9867_of_match);
static const struct dev_pm_ops max9867_pm_ops = {
SET_SYSTEM_SLEEP_PM_OPS(max9867_suspend, max9867_resume)
};
static struct i2c_driver max9867_i2c_driver = {
.driver = {
.name = "max9867",
.of_match_table = of_match_ptr(max9867_of_match),
.pm = &max9867_pm_ops,
},
.probe = max9867_i2c_probe,
.id_table = max9867_i2c_id,

2
sound/soc/codecs/max9867.h
View File

@ -67,7 +67,7 @@
#define MAX9867_MICCONFIG 0x15
#define MAX9867_MODECONFIG 0x16
#define MAX9867_PWRMAN 0x17
#define MAX9867_SHTDOWN_MASK (1<<7)
#define MAX9867_SHTDOWN 0x80
#define MAX9867_REVISION 0xff
#define MAX9867_CACHEREGNUM 10