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irqdomain: Introduce helper function irq_domain_add_hierarchy()

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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>
This commit is contained in:
Jiang Liu 2014-11-15 22:24:02 +08:00 committed by Thomas Gleixner
parent 36d727310c
commit afb7da83b9
2 changed files with 40 additions and 0 deletions
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4
include/linux/irqdomain.h
View File

@ -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);

36
kernel/irq/irqdomain.c
View File

@ -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;