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Commit dabe152b authored by Xiao Li's avatar Xiao Li
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ASoC: aw8896: add resume/suspend methods for codec driver 



Add resume/suspend methods for aw8896 codec driver to control LDO supply
for PA chip's DVDD pin so as to lower the power consumption when device
get in suspend mode.

Change-Id: I9a5ec5350e4fbe22794abb1e063b28a3aeae0e48
Signed-off-by: default avatarXiao Li <lixiao@codeaurora.org>
parent 8517bb17

sound/soc/codecs/aw8896.c

+40 −0
Original line number Diff line number Diff line
@@ -982,9 +982,49 @@ static int aw8896_codec_write(struct snd_soc_codec *codec, unsigned int reg, 
	return -EINVAL;

}



#ifdef CONFIG_PM

static int aw8896_suspend(struct snd_soc_codec *codec)

{

	int ret = 0;

	struct aw8896 *aw8896 = snd_soc_codec_get_drvdata(codec);



	/* clear FW/DSP status flags so the DSP can get into

	 * correct status after resume

	 */

	aw8896->init = 0;

	aw8896->dsp_fw_state = AW8896_DSP_FW_FAIL;

	aw8896->dsp_cfg_state = AW8896_DSP_CFG_FAIL;



	ret = regulator_disable(aw8896->supply.regulator);

	if (ret < 0)

		dev_err(codec->dev, "%s: fail to disable regulator, err:%d\n",

			__func__, ret);



	return 0;

}



static int aw8896_resume(struct snd_soc_codec *codec)

{

	int ret = 0;

	struct aw8896 *aw8896 = snd_soc_codec_get_drvdata(codec);



	ret = regulator_enable(aw8896->supply.regulator);

	if (ret < 0)

		dev_err(codec->dev, "%s: fail to enable regulator, err:%d\n",

			__func__, ret);



	return 0;

}

#else

#define aw8896_suspend NULL

#define aw8896_resume NULL

#endif



static struct snd_soc_codec_driver soc_codec_dev_aw8896 = {

	.probe = aw8896_probe,

	.remove = aw8896_remove,

	.suspend = aw8896_suspend,

	.resume = aw8896_resume,

	.read = aw8896_codec_read,

	.write = aw8896_codec_write,

	.reg_cache_size = AW8896_REG_MAX,