1 files changed, 15 insertions, 0 deletions

diff --git a/drivers/serial/pmac_zilog.c b/drivers/serial/pmac_zilog.c
index ad3488504010..9c1243fbd512 100644
--- a/drivers/serial/pmac_zilog.c
+++ b/drivers/serial/pmac_zilog.c
@@ -1538,6 +1538,21 @@ no_dma:
         uap->port.type = PORT_PMAC_ZILOG;
         uap->port.flags = 0;
 
+        /*
+         * Fixup for the port on Gatwick for which the device-tree has
+         * missing interrupts. Normally, the macio_dev would contain
+         * fixed up interrupt info, but we use the device-tree directly
+         * here due to early probing so we need the fixup too.
+         */
+        if (uap->port.irq == NO_IRQ &&
+            np->parent && np->parent->parent &&
+            of_device_is_compatible(np->parent->parent, "gatwick")) {
+                /* IRQs on gatwick are offset by 64 */
+                uap->port.irq = irq_create_mapping(NULL, 64 + 15);
+                uap->tx_dma_irq = irq_create_mapping(NULL, 64 + 4);
+                uap->rx_dma_irq = irq_create_mapping(NULL, 64 + 5);
+        }
+
         /* Setup some valid baud rate information in the register
          * shadows so we don't write crap there before baud rate is
          * first initialized.