5 files changed, 13 insertions, 12 deletions
diff --git a/arch/arm/Kconfig b/arch/arm/Kconfig
index a48aecc17ea..34aed718fae 100644
--- a/arch/arm/Kconfig
+++ b/arch/arm/Kconfig
@@ -760,6 +760,7 @@ config ARCH_SA1100
 	select ARCH_REQUIRE_GPIOLIB
 	select HAVE_IDE
 	select NEED_MACH_MEMORY_H
+	select SPARSE_IRQ
 	help
 	  Support for StrongARM 11x0 based boards.
 
diff --git a/arch/arm/mach-sa1100/badge4.c b/arch/arm/mach-sa1100/badge4.c
index 8c805425b68..e0f0c030258 100644
--- a/arch/arm/mach-sa1100/badge4.c
+++ b/arch/arm/mach-sa1100/badge4.c
@@ -57,7 +57,6 @@ static void badge4_sa1111_disable(void *data, unsigned devid)
 }
 
 static struct sa1111_platform_data sa1111_info = {
-	.irq_base	= IRQ_BOARD_END,
 	.disable_devs	= SA1111_DEVID_PS2_MSE,
 	.enable		= badge4_sa1111_enable,
 	.disable	= badge4_sa1111_disable,
diff --git a/arch/arm/mach-sa1100/include/mach/irqs.h b/arch/arm/mach-sa1100/include/mach/irqs.h
index 0ad78218c9f..3790298b714 100644
--- a/arch/arm/mach-sa1100/include/mach/irqs.h
+++ b/arch/arm/mach-sa1100/include/mach/irqs.h
@@ -71,16 +71,19 @@
 /*
  * Figure out the MAX IRQ number.
  *
- * If we have an SA1111, the max IRQ is S1_BVD1_STSCHG+1.
- * If we have an LoCoMo, the max IRQ is IRQ_BOARD_START + 4
- * Otherwise, we have the standard IRQs only.
+ * Neponset, SA1111 and UCB1x00 are sparse IRQ aware, so can dynamically
+ * allocate their IRQs above NR_IRQS.
+ *
+ * LoCoMo has 4 additional IRQs, but is not sparse IRQ aware, and so has
+ * to be included in the NR_IRQS calculation.
  */
-#ifdef CONFIG_SA1111
-#define NR_IRQS			(IRQ_BOARD_END + 55)
-#elif defined(CONFIG_SHARP_LOCOMO)
-#define NR_IRQS			(IRQ_BOARD_START + 4)
+#ifdef CONFIG_SHARP_LOCOMO
+#define NR_IRQS_LOCOMO		4
 #else
-#define NR_IRQS			(IRQ_BOARD_START)
+#define NR_IRQS_LOCOMO		0
 #endif
 
-#define SA1100_NR_IRQS NR_IRQS
+#ifndef NR_IRQS
+#define NR_IRQS (IRQ_BOARD_START + NR_IRQS_LOCOMO)
+#endif
+#define SA1100_NR_IRQS (IRQ_BOARD_START + NR_IRQS_LOCOMO)
diff --git a/arch/arm/mach-sa1100/jornada720.c b/arch/arm/mach-sa1100/jornada720.c
index b7dcb1887ac..ca7a7e83472 100644
--- a/arch/arm/mach-sa1100/jornada720.c
+++ b/arch/arm/mach-sa1100/jornada720.c
@@ -195,7 +195,6 @@ static struct resource sa1111_resources[] = {
 };
 
 static struct sa1111_platform_data sa1111_info = {
-	.irq_base	= IRQ_BOARD_END,
 	.disable_devs	= SA1111_DEVID_PS2_MSE,
 };
 
diff --git a/arch/arm/mach-sa1100/neponset.c b/arch/arm/mach-sa1100/neponset.c
index b04a8f1928f..6c58f01b358 100644
--- a/arch/arm/mach-sa1100/neponset.c
+++ b/arch/arm/mach-sa1100/neponset.c
@@ -229,7 +229,6 @@ static struct irq_chip nochip = {
 };
 
 static struct sa1111_platform_data sa1111_info = {
-	.irq_base	= IRQ_BOARD_END,
 	.disable_devs	= SA1111_DEVID_PS2_MSE,
 };