[ALSA] ak4531 - Add PM support

Modules: AK4531 codec

Add PM support to AK4531 codec driver.

Signed-off-by: Takashi Iwai <tiwai@suse.de>

2 files changed, 40 insertions, 1 deletions

diff --git a/include/sound/ak4531_codec.h b/include/sound/ak4531_codec.h
index 4e7c661af484..edf04070ce7c 100644
--- a/include/sound/ak4531_codec.h
+++ b/include/sound/ak4531_codec.h
@@ -77,4 +77,9 @@ struct snd_ak4531 {
 int snd_ak4531_mixer(struct snd_card *card, struct snd_ak4531 *_ak4531,
                      struct snd_ak4531 **rak4531);
 
+#ifdef CONFIG_PM
+void snd_ak4531_suspend(struct snd_ak4531 *ak4531);
+void snd_ak4531_resume(struct snd_ak4531 *ak4531);
+#endif
+
 #endif /* __SOUND_AK4531_CODEC_H */
diff --git a/sound/pci/ac97/ak4531_codec.c b/sound/pci/ac97/ak4531_codec.c
index 088d8dc336be..3eb885584e9a 100644
--- a/sound/pci/ac97/ak4531_codec.c
+++ b/sound/pci/ac97/ak4531_codec.c
@@ -371,7 +371,7 @@ int snd_ak4531_mixer(struct snd_card *card, struct snd_ak4531 *_ak4531,
         ak4531->write(ak4531, AK4531_RESET, 0x03);      /* no RST, PD */
         udelay(100);
         ak4531->write(ak4531, AK4531_CLOCK, 0x00);      /* CODEC ADC and CODEC DAC use {LR,B}CLK2 and run off LRCLK2 PLL */
-        for (idx = 0; idx < 0x19; idx++) {
+        for (idx = 0; idx <= 0x19; idx++) {
                 if (idx == AK4531_RESET || idx == AK4531_CLOCK)
                         continue;
                 ak4531->write(ak4531, idx, ak4531->regs[idx] = snd_ak4531_initial_map[idx]);    /* recording source is mixer */
@@ -396,6 +396,36 @@ int snd_ak4531_mixer(struct snd_card *card, struct snd_ak4531 *_ak4531,
 }
 
 /*
+ * power management
+ */
+#ifdef CONFIG_PM
+void snd_ak4531_suspend(struct snd_ak4531 *ak4531)
+{
+        /* mute */
+        ak4531->write(ak4531, AK4531_LMASTER, 0x9f);
+        ak4531->write(ak4531, AK4531_RMASTER, 0x9f);
+        /* powerdown */
+        ak4531->write(ak4531, AK4531_RESET, 0x01);
+}
+
+void snd_ak4531_resume(struct snd_ak4531 *ak4531)
+{
+        int idx;
+
+        /* initialize */
+        ak4531->write(ak4531, AK4531_RESET, 0x03);
+        udelay(100);
+        ak4531->write(ak4531, AK4531_CLOCK, 0x00);
+        /* restore mixer registers */
+        for (idx = 0; idx <= 0x19; idx++) {
+                if (idx == AK4531_RESET || idx == AK4531_CLOCK)
+                        continue;
+                ak4531->write(ak4531, idx, ak4531->regs[idx]);
+        }
+}
+#endif
+
+/*
 
  */
 
@@ -420,6 +450,10 @@ static void snd_ak4531_proc_init(struct snd_card *card, struct snd_ak4531 *ak453
 }
 
 EXPORT_SYMBOL(snd_ak4531_mixer);
+#ifdef CONFIG_PM
+EXPORT_SYMBOL(snd_ak4531_suspend);
+EXPORT_SYMBOL(snd_ak4531_resume);
+#endif
 
 /*
  *  INIT part