[ALSA] azt2320 - Add PM support

Modules: AZT2320 driver

Add PM support to azt2320 driver.

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

1 files changed, 37 insertions, 9 deletions

diff --git a/sound/isa/azt2320.c b/sound/isa/azt2320.c
index db4e7334a67d..a530691bf4f7 100644
--- a/sound/isa/azt2320.c
+++ b/sound/isa/azt2320.c
@@ -93,6 +93,7 @@ struct snd_card_azt2320 {
         int dev_no;
         struct pnp_dev *dev;
         struct pnp_dev *devmpu;
+        struct snd_cs4231 *chip;
 };
 
 static struct pnp_card_device_id snd_azt2320_pnpids[] = {
@@ -329,11 +330,33 @@ static int __devinit snd_azt2320_pnp_detect(struct pnp_card_link *card,
 
 static void __devexit snd_azt2320_pnp_remove(struct pnp_card_link * pcard)
 {
-        struct snd_card *card = (struct snd_card *) pnp_get_card_drvdata(pcard);
+        snd_card_free(pnp_get_card_drvdata(pcard));
+        pnp_set_card_drvdata(pcard, NULL);
+}
+
+#ifdef CONFIG_PM
+static int snd_azt2320_pnp_suspend(struct pnp_card_link *pcard, pm_message_t state)
+{
+        struct snd_card *card = pnp_get_card_drvdata(pcard);
+        struct snd_card_azt2320 *acard = card->private_data;
+        struct snd_cs4231 *chip = acard->chip;
+
+        snd_power_change_state(card, SNDRV_CTL_POWER_D3hot);
+        chip->suspend(chip);
+        return 0;
+}
+
+static int snd_azt2320_pnp_resume(struct pnp_card_link *pcard)
+{
+        struct snd_card *card = pnp_get_card_drvdata(pcard);
+        struct snd_card_azt2320 *acard = card->private_data;
+        struct snd_cs4231 *chip = acard->chip;
 
-        snd_card_disconnect(card);
-        snd_card_free_in_thread(card);
+        chip->resume(chip);
+        snd_power_change_state(card, SNDRV_CTL_POWER_D0);
+        return 0;
 }
+#endif
 
 static struct pnp_card_driver azt2320_pnpc_driver = {
         .flags          = PNP_DRIVER_RES_DISABLE,
@@ -341,20 +364,25 @@ static struct pnp_card_driver azt2320_pnpc_driver = {
         .id_table       = snd_azt2320_pnpids,
         .probe          = snd_azt2320_pnp_detect,
         .remove         = __devexit_p(snd_azt2320_pnp_remove),
+#ifdef CONFIG_PM
+        .suspend        = snd_azt2320_pnp_suspend,
+        .resume         = snd_azt2320_pnp_resume,
+#endif
 };
 
 static int __init alsa_card_azt2320_init(void)
 {
-        int cards = 0;
+        int cards;
 
-        cards += pnp_register_card_driver(&azt2320_pnpc_driver);
-#ifdef MODULE
-        if (!cards) {
+        cards = pnp_register_card_driver(&azt2320_pnpc_driver);
+        if (cards <= 0) {
                 pnp_unregister_card_driver(&azt2320_pnpc_driver);
+#ifdef MODULE
                 snd_printk(KERN_ERR "no AZT2320 based soundcards found\n");
-        }
 #endif
-        return cards ? 0 : -ENODEV;
+                return -ENODEV;
+        }
+        return 0;
 }
 
 static void __exit alsa_card_azt2320_exit(void)