Introduce helper function irq_domain_add_hierarchy(), which creates
a linear irqdomain if parameter 'size' is not zero, otherwise creates
a tree irqdomain.
Signed-off-by: Jiang Liu <jiang.liu@xxxxxxxxxxxxxxx>
---
include/linux/irqdomain.h | 4 ++++
kernel/irq/irqdomain.c | 19 +++++++++++++++++++
2 files changed, 23 insertions(+)
diff --git a/include/linux/irqdomain.h b/include/linux/irqdomain.h
index ad92b0b15945..30e8c753fa98 100644
--- a/include/linux/irqdomain.h
+++ b/include/linux/irqdomain.h
@@ -248,6 +248,10 @@ int irq_domain_xlate_onetwocell(struct irq_domain *d, struct device_node *ctrlr,
extern struct irq_data *irq_domain_get_irq_data(struct irq_domain *domain,
unsigned int virq);
#ifdef CONFIG_IRQ_DOMAIN_HIERARCHY
+extern struct irq_domain *irq_domain_add_hierarchy(struct irq_domain *parent,
+ unsigned int flags, unsigned int size,
+ struct device_node *node,
+ const struct irq_domain_ops *ops, void *host_data);
extern int __irq_domain_alloc_irqs(struct irq_domain *domain, int irq_base,
unsigned int nr_irqs, int node, void *arg,
bool realloc);
diff --git a/kernel/irq/irqdomain.c b/kernel/irq/irqdomain.c
index 03fc7d018324..73c66d6f9ffc 100644
--- a/kernel/irq/irqdomain.c
+++ b/kernel/irq/irqdomain.c
@@ -742,6 +742,25 @@ static int irq_domain_alloc_descs(int virq, unsigned int cnt,
}
#ifdef CONFIG_IRQ_DOMAIN_HIERARCHY
+struct irq_domain *irq_domain_add_hierarchy(struct irq_domain *parent,
+ unsigned int flags, unsigned int size,
+ struct device_node *node,
+ const struct irq_domain_ops *ops, void *host_data)
+{
+ struct irq_domain *domain;
+
+ if (size)
+ domain = irq_domain_add_linear(node, size, ops, host_data);
+ else
+ domain = irq_domain_add_tree(node, ops, host_data);
+ if (domain) {
+ domain->parent = parent;
+ domain->flags |= flags;
+ }
+
+ return domain;
+}
+
static void irq_domain_insert_irq(int virq)
{
struct irq_data *data;
--
1.7.10.4
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