int snd_usb_mixer_set_ctl_value(struct usb_mixer_elem_info *cval,
int request, int validx, int value_set);
-void snd_usb_mixer_inactivate(struct usb_mixer_interface *mixer);
-int snd_usb_mixer_activate(struct usb_mixer_interface *mixer);
int snd_usb_mixer_add_control(struct usb_mixer_interface *mixer,
struct snd_kcontrol *kctl);
int snd_usb_mixer_vol_tlv(struct snd_kcontrol *kcontrol, int op_flag,
unsigned int size, unsigned int __user *_tlv);
+#ifdef CONFIG_PM
+int snd_usb_mixer_suspend(struct usb_mixer_interface *mixer);
+int snd_usb_mixer_resume(struct usb_mixer_interface *mixer, bool reset_resume);
+#endif
+
#endif /* __USBMIXER_H */