Asoc: swr: Handle MBHC and IRQ interrupts from tx slave

Interrupts will be handled by slave driver. This
needs slave pointer to store virtual interrupt and
pass it as a parameter to handle_nested_irq.

Change-Id: I356102a04b4fda7e5863f809cd848d7a82b82f36
Signed-off-by: Vatsal Bucha <vbucha@codeaurora.org>

include/soc/soundwire.h

@@ -15,6 +15,7 @@
 #include <linux/device.h>
 #include <linux/mutex.h>
 #include <linux/mod_devicetable.h>
+#include <linux/irqdomain.h>
 
 extern struct bus_type soundwire_type;
 
@@ -204,7 +205,7 @@ struct swr_device {
 	struct device    dev;
 	unsigned long    addr;
 	u8 group_id;
-	u8 slave_irq;
+	struct irq_domain *slave_irq;
 };
 
 static inline struct swr_device *to_swr_device(struct device *dev)

soc/swr-mstr-ctrl.c

@@ -1078,7 +1078,9 @@ static irqreturn_t swr_mstr_interrupt(int irq, void *dev)
 				if (swr_dev->dev_num != devnum)
 					continue;
 				if (swr_dev->slave_irq)
-					handle_nested_irq(swr_dev->slave_irq);
+					handle_nested_irq(
+						irq_find_mapping(
+						swr_dev->slave_irq, 0));
 			}
 			break;
 		case SWRM_INTERRUPT_STATUS_NEW_SLAVE_ATTACHED: