SoC: soundwire: Add support to register for event listener

Add support to register/deregister for event listener to listen to
headset interrupt events during low power island mode.

Change-Id: I9d05261003ef9e4783e03b3acb529c864c07cbec
Signed-off-by: Sudheer Papothi <[email protected]>

include/soc/swr-wcd.h

@@ -22,6 +22,8 @@ enum {
 	SWR_REGISTER_WAKE_IRQ,
 	SWR_SET_PORT_MAP,
 	SWR_REQ_CLK_SWITCH,
+	SWR_REGISTER_WAKEUP,
+	SWR_DEREGISTER_WAKEUP,
 };
 
 struct swr_mstr_port {

soc/swr-mstr-ctrl.c

@@ -2871,6 +2871,14 @@ int swrm_wcd_notify(struct platform_device *pdev, u32 id, void *data)
 			mutex_unlock(&swrm->mlock);
 		}
 		break;
+	case SWR_REGISTER_WAKEUP:
+		msm_aud_evt_blocking_notifier_call_chain(
+					SWR_WAKE_IRQ_REGISTER, (void *)swrm);
+		break;
+	case SWR_DEREGISTER_WAKEUP:
+		msm_aud_evt_blocking_notifier_call_chain(
+					SWR_WAKE_IRQ_DEREGISTER, (void *)swrm);
+		break;
 	case SWR_SET_PORT_MAP:
 		if (!data) {
 			dev_err(swrm->dev, "%s: data is NULL for id=%d\n",