diff options
author | Jiang Liu <jiang.liu@linux.intel.com> | 2014-11-15 22:24:02 +0800 |
---|---|---|
committer | Thomas Gleixner <tglx@linutronix.de> | 2014-11-23 13:01:46 +0100 |
commit | afb7da83b9f476728623130703acb553d7c7c4d9 (patch) | |
tree | 1d83a329f50cea86c5ff7fb943ccc07bdf9a8b75 /kernel/irq/irqdomain.c | |
parent | 36d727310cb9f85efb5ac089ffb1797e7c3538e1 (diff) |
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.liu@linux.intel.com>
Cc: Tony Luck <tony.luck@intel.com>
Cc: linux-arm-kernel@lists.infradead.org
Cc: Bjorn Helgaas <bhelgaas@google.com>
Cc: Grant Likely <grant.likely@linaro.org>
Cc: Marc Zyngier <marc.zyngier@arm.com>
Cc: Yijing Wang <wangyijing@huawei.com>
Cc: Yingjoe Chen <yingjoe.chen@mediatek.com>
Cc: Borislav Petkov <bp@alien8.de>
Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Cc: Matthias Brugger <matthias.bgg@gmail.com>
Link: http://lkml.kernel.org/r/1416061447-9472-5-git-send-email-jiang.liu@linux.intel.com
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Diffstat (limited to 'kernel/irq/irqdomain.c')
-rw-r--r-- | kernel/irq/irqdomain.c | 36 |
1 files changed, 36 insertions, 0 deletions
diff --git a/kernel/irq/irqdomain.c b/kernel/irq/irqdomain.c index 9c88db7056d4..7fac311057b8 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; |