From: Changhwan Youn <chaos.youn@samsung.com>
Date: Mon, 29 Nov 2010 08:04:46 +0000 (+0900)
Subject: ARM: S5PV310: Limit the irqs which support cascade interrupt
X-Git-Url: https://git.karo-electronics.de/?a=commitdiff_plain;h=1f2d6c49f087c84ed54ad3e0801faeca3e2ccfdd;p=mv-sheeva.git

ARM: S5PV310: Limit the irqs which support cascade interrupt

The irqs from SPI(0) to SPI(39) and SPI(51), SPI(53) are connected to the
interrupt combiner. This patch limits the irqs which should be initialized
to support cascade interrupt.

Signed-off-by: Changhwan Youn <chaos.youn@samsung.com>
Signed-off-by: Kukjin Kim <kgene.kim@samsung.com>
---

diff --git a/arch/arm/mach-s5pv310/cpu.c b/arch/arm/mach-s5pv310/cpu.c
index 82ce4aa6d61..3d0c1cb68d9 100644
--- a/arch/arm/mach-s5pv310/cpu.c
+++ b/arch/arm/mach-s5pv310/cpu.c
@@ -127,6 +127,15 @@ void __init s5pv310_init_irq(void)
 	gic_cpu_init(0, S5P_VA_GIC_CPU);
 
 	for (irq = 0; irq < MAX_COMBINER_NR; irq++) {
+
+		/*
+		 * From SPI(0) to SPI(39) and SPI(51), SPI(53) are
+		 * connected to the interrupt combiner. These irqs
+		 * should be initialized to support cascade interrupt.
+		 */
+		if ((irq >= 40) && !(irq == 51) && !(irq == 53))
+			continue;
+
 		combiner_init(irq, (void __iomem *)S5P_VA_COMBINER(irq),
 				COMBINER_IRQ(irq, 0));
 		combiner_cascade_irq(irq, IRQ_SPI(irq));