ASoC: Implement suspend and resume operations for WM9705
Without this the WM9705 driver fails badly when resuming. Tested-by: Russell King <linux@arm.linux.org.uk> Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
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@ -317,6 +317,41 @@ static int wm9705_reset(struct snd_soc_codec *codec)
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return -EIO;
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}
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#ifdef CONFIG_PM
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static int wm9705_soc_suspend(struct platform_device *pdev)
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{
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struct snd_soc_device *socdev = platform_get_drvdata(pdev);
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struct snd_soc_codec *codec = socdev->card->codec;
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soc_ac97_ops.write(codec->ac97, AC97_POWERDOWN, 0xffff);
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return 0;
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}
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static int wm9705_soc_resume(struct platform_device *pdev)
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{
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struct snd_soc_device *socdev = platform_get_drvdata(pdev);
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struct snd_soc_codec *codec = socdev->card->codec;
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int i, ret;
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u16 *cache = codec->reg_cache;
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ret = wm9705_reset(codec);
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if (ret < 0) {
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printk(KERN_ERR "could not reset AC97 codec\n");
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return ret;
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}
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for (i = 2; i < ARRAY_SIZE(wm9705_reg) << 1; i += 2) {
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soc_ac97_ops.write(codec->ac97, i, cache[i>>1]);
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}
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return 0;
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}
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#else
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#define wm9705_soc_suspend NULL
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#define wm9705_soc_resume NULL
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#endif
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static int wm9705_soc_probe(struct platform_device *pdev)
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{
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struct snd_soc_device *socdev = platform_get_drvdata(pdev);
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@ -407,6 +442,8 @@ static int wm9705_soc_remove(struct platform_device *pdev)
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struct snd_soc_codec_device soc_codec_dev_wm9705 = {
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.probe = wm9705_soc_probe,
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.remove = wm9705_soc_remove,
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.suspend = wm9705_soc_suspend,
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.resume = wm9705_soc_resume,
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};
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EXPORT_SYMBOL_GPL(soc_codec_dev_wm9705);
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