commit 7e71330169d8056536b299290544980bccc6b300
author Grant Likely <grant.likely@secretlab.ca> Tue Jul 26 03:19:06 2011 -0600
committer Grant Likely <grant.likely@secretlab.ca> Thu Jul 28 01:32:04 2011 -0600
tree 7dab4954a7683e35bbf66adadd89b26971960311
parent 08a543ad33fc188650801bd36eed4ffe272643e1

dt/irq: add irq_domain_generate_simple() helper

irq_domain_generate_simple() is an easy way to generate an irq translation
domain for simple irq controllers.  It assumes a flat 1:1 mapping from
hardware irq number to an offset of the first linux irq number assigned
to the controller

Signed-off-by: Grant Likely <grant.likely@secretlab.ca>

include/linux/irqdomain.h

diff --git a/include/linux/irqdomain.h b/include/linux/irqdomain.h
index 8f2c10a..e807ad6 100644
--- a/include/linux/irqdomain.h
+++ b/include/linux/irqdomain.h
@@ -16,6 +16,7 @@
 #define _LINUX_IRQDOMAIN_H
 
 #include <linux/irq.h>
+#include <linux/mod_devicetable.h>
 
 #ifdef CONFIG_IRQ_DOMAIN
 struct device_node;
@@ -78,4 +79,13 @@
 extern void irq_domain_del(struct irq_domain *domain);
 #endif /* CONFIG_IRQ_DOMAIN */
 
+#if defined(CONFIG_IRQ_DOMAIN) && defined(CONFIG_OF_IRQ)
+extern void irq_domain_add_simple(struct device_node *controller, int irq_base);
+extern void irq_domain_generate_simple(const struct of_device_id *match,
+					u64 phys_base, unsigned int irq_start);
+#else /* CONFIG_IRQ_DOMAIN && CONFIG_OF_IRQ */
+static inline void irq_domain_generate_simple(const struct of_device_id *match,
+					u64 phys_base, unsigned int irq_start) { }
+#endif /* CONFIG_IRQ_DOMAIN && CONFIG_OF_IRQ */
+
 #endif /* _LINUX_IRQDOMAIN_H */