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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>
This commit is contained in:
Mark Brown 2010-11-26 17:23:43 +00:00
parent 2e19b0c8c2
commit 39fb51a123
1 changed files with 10 additions and 0 deletions
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10
sound/soc/codecs/wm8994.c
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@ -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,