--- zzzz-none-000/linux-3.10.107/sound/i2c/other/ak4113.c	2017-06-27 09:49:32.000000000 +0000
+++ scorpion-7490-727/linux-3.10.107/sound/i2c/other/ak4113.c	2021-02-04 17:41:59.000000000 +0000
@@ -73,7 +73,7 @@
 		void *private_data, struct ak4113 **r_ak4113)
 {
 	struct ak4113 *chip;
-	int err = 0;
+	int err;
 	unsigned char reg;
 	static struct snd_device_ops ops = {
 		.dev_free =     snd_ak4113_dev_free,
@@ -89,6 +89,7 @@
 	chip->private_data = private_data;
 	INIT_DELAYED_WORK(&chip->work, ak4113_stats);
 	atomic_set(&chip->wq_processing, 0);
+	mutex_init(&chip->reinit_mutex);
 
 	for (reg = 0; reg < AK4113_WRITABLE_REGS ; reg++)
 		chip->regmap[reg] = pgm[reg];
@@ -98,7 +99,7 @@
 			AK4113_CINT | AK4113_STC);
 	chip->rcs1 = reg_read(chip, AK4113_REG_RCS1);
 	chip->rcs2 = reg_read(chip, AK4113_REG_RCS2);
-	err = snd_device_new(card, SNDRV_DEV_LOWLEVEL, chip, &ops);
+	err = snd_device_new(card, SNDRV_DEV_CODEC, chip, &ops);
 	if (err < 0)
 		goto __fail;
 
@@ -108,7 +109,7 @@
 
 __fail:
 	snd_ak4113_free(chip);
-	return err < 0 ? err : -EIO;
+	return err;
 }
 EXPORT_SYMBOL_GPL(snd_ak4113_create);
 
@@ -141,7 +142,9 @@
 {
 	if (atomic_inc_return(&chip->wq_processing) == 1)
 		cancel_delayed_work_sync(&chip->work);
+	mutex_lock(&chip->reinit_mutex);
 	ak4113_init_regs(chip);
+	mutex_unlock(&chip->reinit_mutex);
 	/* bring up statistics / event queing */
 	if (atomic_dec_and_test(&chip->wq_processing))
 		schedule_delayed_work(&chip->work, HZ / 10);
@@ -636,3 +639,19 @@
 	if (atomic_dec_and_test(&chip->wq_processing))
 		schedule_delayed_work(&chip->work, HZ / 10);
 }
+
+#ifdef CONFIG_PM
+void snd_ak4113_suspend(struct ak4113 *chip)
+{
+	atomic_inc(&chip->wq_processing); /* don't schedule new work */
+	cancel_delayed_work_sync(&chip->work);
+}
+EXPORT_SYMBOL(snd_ak4113_suspend);
+
+void snd_ak4113_resume(struct ak4113 *chip)
+{
+	atomic_dec(&chip->wq_processing);
+	snd_ak4113_reinit(chip);
+}
+EXPORT_SYMBOL(snd_ak4113_resume);
+#endif