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Commit 39fb51a1 authored by Mark Brown's avatar Mark Brown
Browse files

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: default avatarMark Brown <broonie@opensource.wolfsonmicro.com>
Acked-by: default avatarLiam Girdwood <lrg@slimlogic.co.uk>
parent 2e19b0c8

sound/soc/codecs/wm8994.c

+10 −0
Original line number Diff line number Diff line
@@ -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,