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authorJiang Liu <jiang.liu@linux.intel.com>2014-11-15 22:24:02 +0800
committerThomas Gleixner <tglx@linutronix.de>2014-11-23 13:01:46 +0100
commitafb7da83b9f476728623130703acb553d7c7c4d9 (patch)
tree1d83a329f50cea86c5ff7fb943ccc07bdf9a8b75 /kernel/irq
parent36d727310cb9f85efb5ac089ffb1797e7c3538e1 (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')
-rw-r--r--kernel/irq/irqdomain.c36
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;