ARC: Prepare interrupt code for external controllers

This patch adds some room for CPU-external interrupt controllers in the
Linux interrupt space. Until now, only the 32 CPU internal interrupt lines
were supported which does not allow for external interrupt controllers such
as GPIO modules etc.

Signed-off-by: Christian Ruppert <christian.ruppert@abilis.com>
Signed-off-by: Pierrick Hascoet <pierrick.hascoet@abilis.com>
Signed-off-by: Vineet Gupta <vgupta@synopsys.com>

diff --git a/arch/arc/include/asm/irq.h b/arch/arc/include/asm/irq.h
index 4c588f9820cff65435f61aebbd00d5c351d160b7..57898a17eb8219ac20ec8cd5fb116f10702082e5 100644 (file)
--- a/arch/arc/include/asm/irq.h
+++ b/arch/arc/include/asm/irq.h
@@ -9,7 +9,8 @@
 #ifndef __ASM_ARC_IRQ_H
 #define __ASM_ARC_IRQ_H
 
-#define NR_IRQS                32
+#define NR_CPU_IRQS    32  /* number of interrupt lines of ARC770 CPU */
+#define NR_IRQS                128 /* allow some CPU external IRQ handling */
 
 /* Platform Independent IRQs */
 #define TIMER0_IRQ      3

diff --git a/arch/arc/kernel/irq.c b/arch/arc/kernel/irq.c
index dd4b7e32ad4f5822b7a32bc9859a7b2c1f4b9f17..8115fa531575f0d46d6fb030aa05270f7c7d6983 100644 (file)
--- a/arch/arc/kernel/irq.c
+++ b/arch/arc/kernel/irq.c
@@ -105,7 +105,7 @@ init_onchip_IRQ(struct device_node *intc, struct device_node *parent)
        if (parent)
                panic("DeviceTree incore intc not a root irq controller\n");
 
-       root_domain = irq_domain_add_legacy(intc, NR_IRQS, 0, 0,
+       root_domain = irq_domain_add_legacy(intc, NR_CPU_IRQS, 0, 0,
                                            &arc_intc_domain_ops, NULL);
 
        if (!root_domain)