[POWERPC] Add an optional device_node pointer to the irq_host

The majority of irq_host implementations (3 out of 4) are associated
with a device_node, and need to stash it somewhere. Rather than having
it somewhere different for each host, add an optional device_node pointer
to the irq_host structure.

Signed-off-by: Michael Ellerman <michael@ellerman.id.au>
Signed-off-by: Paul Mackerras <paulus@samba.org>

1 files changed, 6 insertions, 2 deletions

diff --git a/include/asm-powerpc/irq.h b/include/asm-powerpc/irq.h
index 0485c53db2b5..1392db456523 100644
--- a/include/asm-powerpc/irq.h
+++ b/include/asm-powerpc/irq.h
@@ -124,6 +124,9 @@ struct irq_host {
         struct irq_host_ops     *ops;
         void                    *host_data;
         irq_hw_number_t         inval_irq;
+
+        /* Optional device node pointer */
+        struct device_node      *of_node;
 };
 
 /* The main irq map itself is an array of NR_IRQ entries containing the
@@ -142,7 +145,7 @@ extern irq_hw_number_t virq_to_hw(unsigned int virq);
 
 /**
  * irq_alloc_host - Allocate a new irq_host data structure
- * @node: device-tree node of the interrupt controller
+ * @of_node: optional device-tree node of the interrupt controller
  * @revmap_type: type of reverse mapping to use
  * @revmap_arg: for IRQ_HOST_MAP_LINEAR linear only: size of the map
  * @ops: map/unmap host callbacks
@@ -156,7 +159,8 @@ extern irq_hw_number_t virq_to_hw(unsigned int virq);
  * later during boot automatically (the reverse mapping will use the slow path
  * until that happens).
  */
-extern struct irq_host *irq_alloc_host(unsigned int revmap_type,
+extern struct irq_host *irq_alloc_host(struct device_node *of_node,
+                                       unsigned int revmap_type,
                                        unsigned int revmap_arg,
                                        struct irq_host_ops *ops,
                                        irq_hw_number_t inval_irq);