Commit-ID: afb7da83b9f476728623130703acb553d7c7c4d9 Gitweb: http://git.kernel.org/tip/afb7da83b9f476728623130703acb553d7c7c4d9 Author: Jiang Liu <jiang....@linux.intel.com> AuthorDate: Sat, 15 Nov 2014 22:24:02 +0800 Committer: Thomas Gleixner <t...@linutronix.de> CommitDate: Sun, 23 Nov 2014 13:01:46 +0100
irqdomain: Introduce helper function irq_domain_add_hierarchy() 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....@linux.intel.com> Cc: Tony Luck <tony.l...@intel.com> Cc: linux-arm-ker...@lists.infradead.org Cc: Bjorn Helgaas <bhelg...@google.com> Cc: Grant Likely <grant.lik...@linaro.org> Cc: Marc Zyngier <marc.zyng...@arm.com> Cc: Yijing Wang <wangyij...@huawei.com> Cc: Yingjoe Chen <yingjoe.c...@mediatek.com> Cc: Borislav Petkov <b...@alien8.de> Cc: Benjamin Herrenschmidt <b...@kernel.crashing.org> Cc: Matthias Brugger <matthias....@gmail.com> Link: http://lkml.kernel.org/r/1416061447-9472-5-git-send-email-jiang....@linux.intel.com Signed-off-by: Thomas Gleixner <t...@linutronix.de> --- include/linux/irqdomain.h | 4 ++++ kernel/irq/irqdomain.c | 36 ++++++++++++++++++++++++++++++++++++ 2 files changed, 40 insertions(+) diff --git a/include/linux/irqdomain.h b/include/linux/irqdomain.h index dd2709b..676d730 100644 --- a/include/linux/irqdomain.h +++ b/include/linux/irqdomain.h @@ -259,6 +259,10 @@ 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 9c88db7..7fac311 100644 --- a/kernel/irq/irqdomain.c +++ b/kernel/irq/irqdomain.c @@ -742,6 +742,42 @@ static int irq_domain_alloc_descs(int virq, unsigned int cnt, } #ifdef CONFIG_IRQ_DOMAIN_HIERARCHY +/** + * irq_domain_add_hierarchy - Add a irqdomain into the hierarchy + * @parent: Parent irq domain to associate with the new domain + * @flags: Irq domain flags associated to the domain + * @size: Size of the domain. See below + * @node: Optional device-tree node of the interrupt controller + * @ops: Pointer to the interrupt domain callbacks + * @host_data: Controller private data pointer + * + * If @size is 0 a tree domain is created, otherwise a linear domain. + * + * If successful the parent is associated to the new domain and the + * domain flags are set. + * Returns pointer to IRQ domain, or NULL on failure. + */ +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; -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
