diff options
Diffstat (limited to 'sound/soc/codecs/wm9705.c')
| -rw-r--r-- | sound/soc/codecs/wm9705.c | 37 |
1 files changed, 37 insertions, 0 deletions
diff --git a/sound/soc/codecs/wm9705.c b/sound/soc/codecs/wm9705.c index 3265817c5c2..6e23a81dba7 100644 --- a/sound/soc/codecs/wm9705.c +++ b/sound/soc/codecs/wm9705.c @@ -317,6 +317,41 @@ static int wm9705_reset(struct snd_soc_codec *codec) return -EIO; } +#ifdef CONFIG_PM +static int wm9705_soc_suspend(struct platform_device *pdev) +{ + struct snd_soc_device *socdev = platform_get_drvdata(pdev); + struct snd_soc_codec *codec = socdev->card->codec; + + soc_ac97_ops.write(codec->ac97, AC97_POWERDOWN, 0xffff); + + return 0; +} + +static int wm9705_soc_resume(struct platform_device *pdev) +{ + struct snd_soc_device *socdev = platform_get_drvdata(pdev); + struct snd_soc_codec *codec = socdev->card->codec; + int i, ret; + u16 *cache = codec->reg_cache; + + ret = wm9705_reset(codec); + if (ret < 0) { + printk(KERN_ERR "could not reset AC97 codec\n"); + return ret; + } + + for (i = 2; i < ARRAY_SIZE(wm9705_reg) << 1; i += 2) { + soc_ac97_ops.write(codec->ac97, i, cache[i>>1]); + } + + return 0; +} +#else +#define wm9705_soc_suspend NULL +#define wm9705_soc_resume NULL +#endif + static int wm9705_soc_probe(struct platform_device *pdev) { struct snd_soc_device *socdev = platform_get_drvdata(pdev); @@ -407,6 +442,8 @@ static int wm9705_soc_remove(struct platform_device *pdev) struct snd_soc_codec_device soc_codec_dev_wm9705 = { .probe = wm9705_soc_probe, .remove = wm9705_soc_remove, + .suspend = wm9705_soc_suspend, + .resume = wm9705_soc_resume, }; EXPORT_SYMBOL_GPL(soc_codec_dev_wm9705); |