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-rw-r--r--include/linux/irqdomain.h6
-rw-r--r--kernel/irq/irqdomain.c7
2 files changed, 13 insertions, 0 deletions
diff --git a/include/linux/irqdomain.h b/include/linux/irqdomain.h
index 4683b66eded9..e52fd5e5494c 100644
--- a/include/linux/irqdomain.h
+++ b/include/linux/irqdomain.h
@@ -276,6 +276,12 @@ struct irq_domain_info {
int direct_max;
const struct irq_domain_ops *ops;
void *host_data;
+#ifdef CONFIG_IRQ_DOMAIN_HIERARCHY
+ /**
+ * @parent: Pointer to the parent irq domain used in a hierarchy domain
+ */
+ struct irq_domain *parent;
+#endif
};
struct irq_domain *irq_domain_instantiate(const struct irq_domain_info *info);
diff --git a/kernel/irq/irqdomain.c b/kernel/irq/irqdomain.c
index 26ad1ea67998..1269a8104e6c 100644
--- a/kernel/irq/irqdomain.c
+++ b/kernel/irq/irqdomain.c
@@ -265,6 +265,13 @@ struct irq_domain *irq_domain_instantiate(const struct irq_domain_info *info)
domain->flags |= info->domain_flags;
+#ifdef CONFIG_IRQ_DOMAIN_HIERARCHY
+ if (info->parent) {
+ domain->root = info->parent->root;
+ domain->parent = info->parent;
+ }
+#endif
+
__irq_domain_publish(domain);
return domain;