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 --- CHANGES: -v2: Implement power management using set_bias_level
sound/soc/codecs/max9867.c | 72 ++++++++++++++++++++++++-------------- sound/soc/codecs/max9867.h | 2 +- 2 files changed, 46 insertions(+), 28 deletions(-)
diff --git a/sound/soc/codecs/max9867.c b/sound/soc/codecs/max9867.c index 1b155f40b106..c454de434d76 100644 --- a/sound/soc/codecs/max9867.c +++ b/sound/soc/codecs/max9867.c @@ -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, diff --git a/sound/soc/codecs/max9867.h b/sound/soc/codecs/max9867.h index 55cd9976ff47..d9170850c96e 100644 --- a/sound/soc/codecs/max9867.h +++ b/sound/soc/codecs/max9867.h @@ -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