1 files changed, 5 insertions, 0 deletions

diff --git a/include/linux/irq.h b/include/linux/irq.h
index 03f48d936f66..13ba412ce3a0 100644
--- a/include/linux/irq.h
+++ b/include/linux/irq.h
@@ -133,6 +133,8 @@ struct irq_domain;
  * @chip:               low level interrupt hardware access
  * @domain:             Interrupt translation domain; responsible for mapping
  *                      between hwirq number and linux irq number.
+ * @parent_data:        pointer to parent struct irq_data to support hierarchy
+ *                      irq_domain
  * @handler_data:       per-IRQ data for the irq_chip methods
  * @chip_data:          platform-specific per-chip private data for the chip
  *                      methods, to allow shared chip implementations
@@ -151,6 +153,9 @@ struct irq_data {
         unsigned int            state_use_accessors;
         struct irq_chip         *chip;
         struct irq_domain       *domain;
+#ifdef  CONFIG_IRQ_DOMAIN_HIERARCHY
+        struct irq_data         *parent_data;
+#endif
         void                    *handler_data;
         void                    *chip_data;
         struct msi_desc         *msi_desc;