diff options
| -rw-r--r-- | include/linux/fwnode.h | 1 | ||||
| -rw-r--r-- | include/linux/irqdomain.h | 2 | ||||
| -rw-r--r-- | kernel/irq/irqdomain.c | 51 |
3 files changed, 54 insertions, 0 deletions
diff --git a/include/linux/fwnode.h b/include/linux/fwnode.h index 0408545bce42..37ec668546ab 100644 --- a/include/linux/fwnode.h +++ b/include/linux/fwnode.h @@ -17,6 +17,7 @@ enum fwnode_type { FWNODE_OF, FWNODE_ACPI, FWNODE_PDATA, + FWNODE_IRQCHIP, }; struct fwnode_handle { diff --git a/include/linux/irqdomain.h b/include/linux/irqdomain.h index 995d4c5100d3..949caa728758 100644 --- a/include/linux/irqdomain.h +++ b/include/linux/irqdomain.h @@ -188,6 +188,8 @@ static inline struct device_node *irq_domain_get_of_node(struct irq_domain *d) } #ifdef CONFIG_IRQ_DOMAIN +struct fwnode_handle *irq_domain_alloc_fwnode(void *data); +void irq_domain_free_fwnode(struct fwnode_handle *fwnode); struct irq_domain *__irq_domain_add(struct fwnode_handle *fwnode, int size, irq_hw_number_t hwirq_max, int direct_max, const struct irq_domain_ops *ops, diff --git a/kernel/irq/irqdomain.c b/kernel/irq/irqdomain.c index de6d7493190b..41151d394da7 100644 --- a/kernel/irq/irqdomain.c +++ b/kernel/irq/irqdomain.c @@ -27,6 +27,57 @@ static int irq_domain_alloc_descs(int virq, unsigned int nr_irqs, irq_hw_number_t hwirq, int node); static void irq_domain_check_hierarchy(struct irq_domain *domain); +struct irqchip_fwid { + struct fwnode_handle fwnode; + char *name; + void *data; +}; + +/** + * irq_domain_alloc_fwnode - Allocate a fwnode_handle suitable for + * identifying an irq domain + * @data: optional user-provided data + * + * Allocate a struct device_node, and return a poiner to the embedded + * fwnode_handle (or NULL on failure). + */ +struct fwnode_handle *irq_domain_alloc_fwnode(void *data) +{ + struct irqchip_fwid *fwid; + char *name; + + fwid = kzalloc(sizeof(*fwid), GFP_KERNEL); + name = kasprintf(GFP_KERNEL, "irqchip@%p", data); + + if (!fwid || !name) { + kfree(fwid); + kfree(name); + return NULL; + } + + fwid->name = name; + fwid->data = data; + fwid->fwnode.type = FWNODE_IRQCHIP; + return &fwid->fwnode; +} + +/** + * irq_domain_free_fwnode - Free a non-OF-backed fwnode_handle + * + * Free a fwnode_handle allocated with irq_domain_alloc_fwnode. + */ +void irq_domain_free_fwnode(struct fwnode_handle *fwnode) +{ + struct irqchip_fwid *fwid; + + if (WARN_ON(fwnode->type != FWNODE_IRQCHIP)) + return; + + fwid = container_of(fwnode, struct irqchip_fwid, fwnode); + kfree(fwid->name); + kfree(fwid); +} + /** * __irq_domain_add() - Allocate a new irq_domain data structure * @of_node: optional device-tree node of the interrupt controller |