mirror of https://gitee.com/openkylin/linux.git
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>
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@ -18,6 +18,7 @@
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#include <linux/pm.h>
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#include <linux/i2c.h>
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#include <linux/platform_device.h>
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#include <linux/pm_runtime.h>
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#include <linux/regulator/consumer.h>
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#include <linux/slab.h>
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#include <sound/core.h>
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@ -1803,6 +1804,8 @@ static int wm8994_set_bias_level(struct snd_soc_codec *codec,
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case SND_SOC_BIAS_STANDBY:
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if (codec->dapm.bias_level == SND_SOC_BIAS_OFF) {
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pm_runtime_get_sync(codec->dev);
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/* Tweak DC servo and DSP configuration for
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* improved performance. */
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if (control->type == WM8994 && wm8994->revision < 4) {
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@ -1878,6 +1881,8 @@ static int wm8994_set_bias_level(struct snd_soc_codec *codec,
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WM8994_STARTUP_BIAS_ENA |
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WM8994_VMID_BUF_ENA |
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WM8994_VMID_RAMP_MASK, 0);
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pm_runtime_put(codec->dev);
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}
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break;
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}
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@ -2780,6 +2785,9 @@ static int wm8994_codec_probe(struct snd_soc_codec *codec)
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wm8994->pdata = dev_get_platdata(codec->dev->parent);
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wm8994->codec = codec;
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pm_runtime_enable(codec->dev);
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pm_runtime_resume(codec->dev);
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/* Read our current status back from the chip - we don't want to
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* reset as this may interfere with the GPIO or LDO operation. */
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for (i = 0; i < WM8994_CACHE_SIZE; i++) {
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@ -2995,6 +3003,8 @@ static int wm8994_codec_remove(struct snd_soc_codec *codec)
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wm8994_set_bias_level(codec, SND_SOC_BIAS_OFF);
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pm_runtime_disable(codec->dev);
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switch (control->type) {
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case WM8994:
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wm8994_free_irq(codec->control_data, WM8994_IRQ_MIC2_SHRT,
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