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-rw-r--r--drivers/serial/pmac_zilog.c15
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.