[ALSA] azt2320 - Add PM support

Modules: AZT2320 driver

Add PM support to azt2320 driver.
Signed-off-by: Takashi Iwai <tiwai@suse.de>

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)