[PATCH 13/16] add IRQ remapping

[Ishizaki Kou]

This patch adds irq remapping.
On interrupt mechanism on Beat, when an irq outlet who has an id
hich is formerly used is created, remapping the irq is required.

Signed-off-by: Kou Ishizaki <kou.ishizaki at toshiba.co.jp>
---

Index: linux-2.6.19/arch/powerpc/kernel/irq.c
diff -u linux-2.6.19/arch/powerpc/kernel/irq.c:1.1.1.2 linux-2.6.19/arch/powerpc/kernel/irq.c:1.4
--- linux-2.6.19/arch/powerpc/kernel/irq.c:1.1.1.2	Tue Oct 17 08:40:57 2006
+++ linux-2.6.19/arch/powerpc/kernel/irq.c	Mon Nov  6 22:04:23 2006
@@ -534,6 +534,8 @@
 	 */
 	virq = irq_find_mapping(host, hwirq);
 	if (virq != IRQ_NONE) {
+		if (host->ops->remap)
+			host->ops->remap(host, virq, hwirq);
 		pr_debug("irq: -> existing mapping on virq %d\n", virq);
 		return virq;
 	}
Index: linux-2.6.19/include/asm-powerpc/irq.h
diff -u linux-2.6.19/include/asm-powerpc/irq.h:1.1.1.2 linux-2.6.19/include/asm-powerpc/irq.h:1.3
--- linux-2.6.19/include/asm-powerpc/irq.h:1.1.1.2	Tue Oct 17 08:44:31 2006
+++ linux-2.6.19/include/asm-powerpc/irq.h	Tue Oct 17 13:22:53 2006
@@ -89,6 +89,9 @@
 	/* Dispose of such a mapping */
 	void (*unmap)(struct irq_host *h, unsigned int virq);
 
+	/* Update of such a mapping  */
+	void (*remap)(struct irq_host *h, unsigned int virq, irq_hw_number_t hw);
+
 	/* Translate device-tree interrupt specifier from raw format coming
 	 * from the firmware to a irq_hw_number_t (interrupt line number) and
 	 * type (sense) that can be passed to set_irq_type(). In the absence