diff options
| author | Mark Brown <broonie@opensource.wolfsonmicro.com> | 2010-01-02 13:15:56 +0000 |
|---|---|---|
| committer | Mark Brown <broonie@opensource.wolfsonmicro.com> | 2010-01-04 21:51:13 +0000 |
| commit | 53242c68333570631a15a69842851b458eca3d99 (patch) | |
| tree | 256d4b739f523fe1b523189831fc72c3b1554d81 /sound/soc/codecs | |
| parent | 10505634bfa74871118a21eef8617acad00e4019 (diff) | |
ASoC: Implement suspend and resume for WM8993
Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
Acked-by: Liam Girdwood <lrg@slimlogic.co.uk>
Diffstat (limited to 'sound/soc/codecs')
| -rw-r--r-- | sound/soc/codecs/wm8993.c | 67 |
1 files changed, 67 insertions, 0 deletions
diff --git a/sound/soc/codecs/wm8993.c b/sound/soc/codecs/wm8993.c index 5e32f2ed5fc2..cd2bc05f78cc 100644 --- a/sound/soc/codecs/wm8993.c +++ b/sound/soc/codecs/wm8993.c @@ -227,6 +227,7 @@ struct wm8993_priv { int class_w_users; unsigned int fll_fref; unsigned int fll_fout; + int fll_src; }; static unsigned int wm8993_read_hw(struct snd_soc_codec *codec, u8 reg) @@ -506,6 +507,7 @@ static int wm8993_set_fll(struct snd_soc_dai *dai, int fll_id, int source, wm8993->fll_fref = Fref; wm8993->fll_fout = Fout; + wm8993->fll_src = source; return 0; } @@ -1480,9 +1482,74 @@ static int wm8993_remove(struct platform_device *pdev) return 0; } +#ifdef CONFIG_PM +static int wm8993_suspend(struct platform_device *pdev, pm_message_t state) +{ + struct snd_soc_device *socdev = platform_get_drvdata(pdev); + struct snd_soc_codec *codec = socdev->card->codec; + struct wm8993_priv *wm8993 = codec->private_data; + int fll_fout = wm8993->fll_fout; + int fll_fref = wm8993->fll_fref; + int ret; + + /* Stop the FLL in an orderly fashion */ + ret = wm8993_set_fll(codec->dai, 0, 0, 0, 0); + if (ret != 0) { + dev_err(&pdev->dev, "Failed to stop FLL\n"); + return ret; + } + + wm8993->fll_fout = fll_fout; + wm8993->fll_fref = fll_fref; + + wm8993_set_bias_level(codec, SND_SOC_BIAS_OFF); + + return 0; +} + +static int wm8993_resume(struct platform_device *pdev) +{ + struct snd_soc_device *socdev = platform_get_drvdata(pdev); + struct snd_soc_codec *codec = socdev->card->codec; + struct wm8993_priv *wm8993 = codec->private_data; + u16 *cache = wm8993->reg_cache; + int i, ret; + + /* Restore the register settings */ + for (i = 1; i < WM8993_MAX_REGISTER; i++) { + if (cache[i] == wm8993_reg_defaults[i]) + continue; + snd_soc_write(codec, i, cache[i]); + } + + wm8993_set_bias_level(codec, SND_SOC_BIAS_STANDBY); + + /* Restart the FLL? */ + if (wm8993->fll_fout) { + int fll_fout = wm8993->fll_fout; + int fll_fref = wm8993->fll_fref; + + wm8993->fll_fref = 0; + wm8993->fll_fout = 0; + + ret = wm8993_set_fll(codec->dai, 0, wm8993->fll_src, + fll_fref, fll_fout); + if (ret != 0) + dev_err(codec->dev, "Failed to restart FLL\n"); + } + + return 0; +} +#else +#define wm8993_suspend NULL +#define wm8993_resume NULL +#endif + struct snd_soc_codec_device soc_codec_dev_wm8993 = { .probe = wm8993_probe, .remove = wm8993_remove, + .suspend = wm8993_suspend, + .resume = wm8993_resume, }; EXPORT_SYMBOL_GPL(soc_codec_dev_wm8993); |