irqdomain: Handle domain hierarchy parent in irq_domain_instantiate()

To use irq_domain_instantiate() from irq_domain_create_hierarchy(),
irq_domain_instantiate() needs to handle the domain hierarchy parent.

Add the required functionality.

Signed-off-by: Herve Codina <[email protected]>
Signed-off-by: Thomas Gleixner <[email protected]>
Link: https://lore.kernel.org/r/[email protected]

1 files changed, 6 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);