Commit-ID: 130b8c6c8d86075304952241bf2365cea6489df1
Gitweb: http://git.kernel.org/tip/130b8c6c8d86075304952241bf2365cea6489df1
Author: Marc Zyngier <marc.zyngier@xxxxxxx>
AuthorDate: Tue, 13 Oct 2015 12:51:31 +0100
Committer: Thomas Gleixner <tglx@xxxxxxxxxxxxx>
CommitDate: Tue, 13 Oct 2015 19:01:23 +0200
irqdomain: Allow irq domain lookup by fwnode
So far, our irq domains are still looked up by device node.
Let's change this and allow a domain to be looked up using
a fwnode_handle pointer.
The existing interfaces are preserved with a couple of helpers.
Signed-off-by: Marc Zyngier <marc.zyngier@xxxxxxx>
Reviewed-and-tested-by: Hanjun Guo <hanjun.guo@xxxxxxxxxx>
Tested-by: Lorenzo Pieralisi <lorenzo.pieralisi@xxxxxxx>
Cc: <linux-arm-kernel@xxxxxxxxxxxxxxxxxxx>
Cc: Tomasz Nowicki <tomasz.nowicki@xxxxxxxxxx>
Cc: Suravee Suthikulpanit <Suravee.Suthikulpanit@xxxxxxx>
Cc: Graeme Gregory <graeme@xxxxxxxxxxx>
Cc: Jake Oshins <jakeo@xxxxxxxxxxxxx>
Cc: Jiang Liu <jiang.liu@xxxxxxxxxxxxxxx>
Cc: Jason Cooper <jason@xxxxxxxxxxxxxx>
Cc: Rafael J. Wysocki <rjw@xxxxxxxxxxxxx>
Link: http://lkml.kernel.org/r/1444737105-31573-4-git-send-email-marc.zyngier@xxxxxxx
Signed-off-by: Thomas Gleixner <tglx@xxxxxxxxxxxxx>
---
include/linux/irqdomain.h | 11 +++++++++--
kernel/irq/irqdomain.c | 16 +++++++---------
2 files changed, 16 insertions(+), 11 deletions(-)
diff --git a/include/linux/irqdomain.h b/include/linux/irqdomain.h
index 2f508f4..607c185 100644
--- a/include/linux/irqdomain.h
+++ b/include/linux/irqdomain.h
@@ -183,10 +183,17 @@ struct irq_domain *irq_domain_add_legacy(struct device_node *of_node,
irq_hw_number_t first_hwirq,
const struct irq_domain_ops *ops,
void *host_data);
-extern struct irq_domain *irq_find_matching_host(struct device_node *node,
- enum irq_domain_bus_token bus_token);
+extern struct irq_domain *irq_find_matching_fwnode(struct fwnode_handle *fwnode,
+ enum irq_domain_bus_token bus_token);
extern void irq_set_default_host(struct irq_domain *host);
+static inline struct irq_domain *irq_find_matching_host(struct device_node *node,
+ enum irq_domain_bus_token bus_token)
+{
+ return irq_find_matching_fwnode(node ? &node->fwnode : NULL,
+ bus_token);
+}
+
static inline struct irq_domain *irq_find_host(struct device_node *node)
{
return irq_find_matching_host(node, DOMAIN_BUS_ANY);
diff --git a/kernel/irq/irqdomain.c b/kernel/irq/irqdomain.c
index 1aee5c1..023ab6d 100644
--- a/kernel/irq/irqdomain.c
+++ b/kernel/irq/irqdomain.c
@@ -191,12 +191,12 @@ struct irq_domain *irq_domain_add_legacy(struct device_node *of_node,
EXPORT_SYMBOL_GPL(irq_domain_add_legacy);
/**
- * irq_find_matching_host() - Locates a domain for a given device node
- * @node: device-tree node of the interrupt controller
+ * irq_find_matching_fwnode() - Locates a domain for a given fwnode
+ * @fwnode: FW descriptor of the interrupt controller
* @bus_token: domain-specific data
*/
-struct irq_domain *irq_find_matching_host(struct device_node *node,
- enum irq_domain_bus_token bus_token)
+struct irq_domain *irq_find_matching_fwnode(struct fwnode_handle *fwnode,
+ enum irq_domain_bus_token bus_token)
{
struct irq_domain *h, *found = NULL;
int rc;
@@ -212,12 +212,10 @@ struct irq_domain *irq_find_matching_host(struct device_node *node,
*/
mutex_lock(&irq_domain_mutex);
list_for_each_entry(h, &irq_domain_list, link) {
- struct device_node *of_node;
- of_node = irq_domain_get_of_node(h);
if (h->ops->match)
- rc = h->ops->match(h, node, bus_token);
+ rc = h->ops->match(h, to_of_node(fwnode), bus_token);
else
- rc = ((of_node != NULL) && (of_node == node) &&
+ rc = ((fwnode != NULL) && (h->fwnode == fwnode) &&
((bus_token == DOMAIN_BUS_ANY) ||
(h->bus_token == bus_token)));
@@ -229,7 +227,7 @@ struct irq_domain *irq_find_matching_host(struct device_node *node,
mutex_unlock(&irq_domain_mutex);
return found;
}
-EXPORT_SYMBOL_GPL(irq_find_matching_host);
+EXPORT_SYMBOL_GPL(irq_find_matching_fwnode);
/**
* irq_set_default_host() - Set a "default" irq domain
--
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