diff options
| -rw-r--r-- | include/linux/irqdomain.h | 3 | ||||
| -rw-r--r-- | kernel/irq/irqdomain.c | 31 |
2 files changed, 34 insertions, 0 deletions
diff --git a/include/linux/irqdomain.h b/include/linux/irqdomain.h index 914b0c31d233..222f47af12f4 100644 --- a/include/linux/irqdomain.h +++ b/include/linux/irqdomain.h @@ -273,6 +273,9 @@ static inline bool is_fwnode_irqchip(struct fwnode_handle *fwnode) return fwnode && fwnode->type == FWNODE_IRQCHIP; } +extern void irq_domain_update_bus_token(struct irq_domain *domain, + enum irq_domain_bus_token bus_token); + static inline struct irq_domain *irq_find_matching_fwnode(struct fwnode_handle *fwnode, enum irq_domain_bus_token bus_token) diff --git a/kernel/irq/irqdomain.c b/kernel/irq/irqdomain.c index 75e1f0851c33..f6adeaeb4c16 100644 --- a/kernel/irq/irqdomain.c +++ b/kernel/irq/irqdomain.c @@ -245,6 +245,37 @@ void irq_domain_remove(struct irq_domain *domain) } EXPORT_SYMBOL_GPL(irq_domain_remove); +void irq_domain_update_bus_token(struct irq_domain *domain, + enum irq_domain_bus_token bus_token) +{ + char *name; + + if (domain->bus_token == bus_token) + return; + + mutex_lock(&irq_domain_mutex); + + domain->bus_token = bus_token; + + name = kasprintf(GFP_KERNEL, "%s-%d", domain->name, bus_token); + if (!name) { + mutex_unlock(&irq_domain_mutex); + return; + } + + debugfs_remove_domain_dir(domain); + + if (domain->flags & IRQ_DOMAIN_NAME_ALLOCATED) + kfree(domain->name); + else + domain->flags |= IRQ_DOMAIN_NAME_ALLOCATED; + + domain->name = name; + debugfs_add_domain_dir(domain); + + mutex_unlock(&irq_domain_mutex); +} + /** * irq_domain_add_simple() - Register an irq_domain and optionally map a range of irqs * @of_node: pointer to interrupt controller's device tree node. |