diff options
| -rw-r--r-- | include/linux/irqdomain.h | 8 | ||||
| -rw-r--r-- | kernel/irq/irqdomain.c | 15 |
2 files changed, 23 insertions, 0 deletions
diff --git a/include/linux/irqdomain.h b/include/linux/irqdomain.h index 52bed23e5c61..2c927edc4d43 100644 --- a/include/linux/irqdomain.h +++ b/include/linux/irqdomain.h @@ -141,6 +141,7 @@ struct irq_domain_chip_generic; * purposes related to the irq domain. * @parent: Pointer to parent irq_domain to support hierarchy irq_domains * @msi_parent_ops: Pointer to MSI parent domain methods for per device domain init + * @exit: Function called when the domain is destroyed * * Revmap data, used internally by the irq domain code: * @revmap_size: Size of the linear map table @revmap[] @@ -169,6 +170,7 @@ struct irq_domain { #ifdef CONFIG_GENERIC_MSI_IRQ const struct msi_parent_ops *msi_parent_ops; #endif + void (*exit)(struct irq_domain *d); /* reverse map data. The linear map gets appended to the irq_domain */ irq_hw_number_t hwirq_max; @@ -268,6 +270,10 @@ void irq_domain_free_fwnode(struct fwnode_handle *fwnode); * @bus_token: Domain bus token * @ops: Domain operation callbacks * @host_data: Controller private data pointer + * @init: Function called when the domain is created. + * Allow to do some additional domain initialisation. + * @exit: Function called when the domain is destroyed. + * Allow to do some additional cleanup operation. */ struct irq_domain_info { struct fwnode_handle *fwnode; @@ -284,6 +290,8 @@ struct irq_domain_info { */ struct irq_domain *parent; #endif + int (*init)(struct irq_domain *d); + void (*exit)(struct irq_domain *d); }; 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 a21648c76336..a0324d8e6dab 100644 --- a/kernel/irq/irqdomain.c +++ b/kernel/irq/irqdomain.c @@ -276,12 +276,14 @@ static void irq_domain_free(struct irq_domain *domain) struct irq_domain *irq_domain_instantiate(const struct irq_domain_info *info) { struct irq_domain *domain; + int err; domain = __irq_domain_create(info); if (IS_ERR(domain)) return domain; domain->flags |= info->domain_flags; + domain->exit = info->exit; #ifdef CONFIG_IRQ_DOMAIN_HIERARCHY if (info->parent) { @@ -290,9 +292,19 @@ struct irq_domain *irq_domain_instantiate(const struct irq_domain_info *info) } #endif + if (info->init) { + err = info->init(domain); + if (err) + goto err_domain_free; + } + __irq_domain_publish(domain); return domain; + +err_domain_free: + irq_domain_free(domain); + return ERR_PTR(err); } EXPORT_SYMBOL_GPL(irq_domain_instantiate); @@ -339,6 +351,9 @@ EXPORT_SYMBOL_GPL(__irq_domain_add); */ void irq_domain_remove(struct irq_domain *domain) { + if (domain->exit) + domain->exit(domain); + mutex_lock(&irq_domain_mutex); debugfs_remove_domain_dir(domain); |