diff options
| author | Mark Brown <broonie@opensource.wolfsonmicro.com> | 2010-11-26 17:23:43 +0000 |
|---|---|---|
| committer | Mark Brown <broonie@opensource.wolfsonmicro.com> | 2010-11-27 10:32:14 +0000 |
| commit | 39fb51a123c125e36e9bcb67686b3e2945784250 (patch) | |
| tree | 6406dea4ae13d45077fe39e40c6b5c90b2ccabad /sound/soc/codecs/wm8994.c | |
| parent | 2e19b0c8c21cb06eb5b902588c30ae0529ce8ec3 (diff) | |
ASoC: Implement runtime PM for WM8994/58
This allows us to communicate our power management state back to the
parent device, allowing it to do a full power down when the device is
idle.
Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
Acked-by: Liam Girdwood <lrg@slimlogic.co.uk>
Diffstat (limited to 'sound/soc/codecs/wm8994.c')
| -rw-r--r-- | sound/soc/codecs/wm8994.c | 10 |
1 files changed, 10 insertions, 0 deletions
diff --git a/sound/soc/codecs/wm8994.c b/sound/soc/codecs/wm8994.c index 5f203c545e00..bfd4cf4fde5f 100644 --- a/sound/soc/codecs/wm8994.c +++ b/sound/soc/codecs/wm8994.c @@ -18,6 +18,7 @@ #include <linux/pm.h> #include <linux/i2c.h> #include <linux/platform_device.h> +#include <linux/pm_runtime.h> #include <linux/regulator/consumer.h> #include <linux/slab.h> #include <sound/core.h> @@ -1803,6 +1804,8 @@ static int wm8994_set_bias_level(struct snd_soc_codec *codec, case SND_SOC_BIAS_STANDBY: if (codec->dapm.bias_level == SND_SOC_BIAS_OFF) { + pm_runtime_get_sync(codec->dev); + /* Tweak DC servo and DSP configuration for * improved performance. */ if (control->type == WM8994 && wm8994->revision < 4) { @@ -1878,6 +1881,8 @@ static int wm8994_set_bias_level(struct snd_soc_codec *codec, WM8994_STARTUP_BIAS_ENA | WM8994_VMID_BUF_ENA | WM8994_VMID_RAMP_MASK, 0); + + pm_runtime_put(codec->dev); } break; } @@ -2780,6 +2785,9 @@ static int wm8994_codec_probe(struct snd_soc_codec *codec) wm8994->pdata = dev_get_platdata(codec->dev->parent); wm8994->codec = codec; + pm_runtime_enable(codec->dev); + pm_runtime_resume(codec->dev); + /* Read our current status back from the chip - we don't want to * reset as this may interfere with the GPIO or LDO operation. */ for (i = 0; i < WM8994_CACHE_SIZE; i++) { @@ -2995,6 +3003,8 @@ static int wm8994_codec_remove(struct snd_soc_codec *codec) wm8994_set_bias_level(codec, SND_SOC_BIAS_OFF); + pm_runtime_disable(codec->dev); + switch (control->type) { case WM8994: wm8994_free_irq(codec->control_data, WM8994_IRQ_MIC2_SHRT, |