aboutsummaryrefslogtreecommitdiff
path: root/drivers/of/irq.c
diff options
context:
space:
mode:
authorAndres Salomon <dilinger@queued.net>2010-10-10 21:35:05 -0600
committerGrant Likely <grant.likely@secretlab.ca>2010-10-12 21:58:27 -0600
commit52f6537cb2f0b461a9ce3457c01a6cfa2ae0bb22 (patch)
treedb720ce58637b3c70277f9b0fbe5082fcf6f9b94 /drivers/of/irq.c
parente2f2a93b6384cfe0face0be595bfbda1475d864b (diff)
downloadlinux-stericsson-52f6537cb2f0b461a9ce3457c01a6cfa2ae0bb22.tar.gz
of/irq: remove references to NO_IRQ in drivers/of/platform.c
Instead of referencing NO_IRQ in platform.c, define some helper functions in irq.c to call instead from platform.c. Keep NO_IRQ usage local to irq.c, and define NO_IRQ if not defined in headers. Signed-off-by: Andres Salomon <dilinger@queued.net> Signed-off-by: Grant Likely <grant.likely@secretlab.ca>
Diffstat (limited to 'drivers/of/irq.c')
-rw-r--r--drivers/of/irq.c39
1 files changed, 39 insertions, 0 deletions
diff --git a/drivers/of/irq.c b/drivers/of/irq.c
index 6e595e5a3977..75b0d3cb7676 100644
--- a/drivers/of/irq.c
+++ b/drivers/of/irq.c
@@ -24,6 +24,11 @@
#include <linux/of_irq.h>
#include <linux/string.h>
+/* For archs that don't support NO_IRQ (such as x86), provide a dummy value */
+#ifndef NO_IRQ
+#define NO_IRQ 0
+#endif
+
/**
* irq_of_parse_and_map - Parse and map an interrupt into linux virq space
* @device: Device node of the device whose interrupt is to be mapped
@@ -347,3 +352,37 @@ int of_irq_to_resource(struct device_node *dev, int index, struct resource *r)
return irq;
}
EXPORT_SYMBOL_GPL(of_irq_to_resource);
+
+/**
+ * of_irq_count - Count the number of IRQs a node uses
+ * @dev: pointer to device tree node
+ */
+int of_irq_count(struct device_node *dev)
+{
+ int nr = 0;
+
+ while (of_irq_to_resource(dev, nr, NULL) != NO_IRQ)
+ nr++;
+
+ return nr;
+}
+
+/**
+ * of_irq_to_resource_table - Fill in resource table with node's IRQ info
+ * @dev: pointer to device tree node
+ * @res: array of resources to fill in
+ * @nr_irqs: the number of IRQs (and upper bound for num of @res elements)
+ *
+ * Returns the size of the filled in table (up to @nr_irqs).
+ */
+int of_irq_to_resource_table(struct device_node *dev, struct resource *res,
+ int nr_irqs)
+{
+ int i;
+
+ for (i = 0; i < nr_irqs; i++, res++)
+ if (of_irq_to_resource(dev, i, res) == NO_IRQ)
+ break;
+
+ return i;
+}