ARM: 8227/1: sa1100: switch to MULTI_IRQ_HANDLER

Add sa1100_handle_irq implementating handle_irq for sa1100 platform.
It is more or less a translation of old assembly code from assembler to
plain C. Also install this irq handler from sa1100_init_irq().

Signed-off-by: Dmitry Eremin-Solenikov <dbaryshkov@gmail.com>
Tested-by: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>

diff --git a/arch/arm/Kconfig b/arch/arm/Kconfig
index 89c4b5c..2f3f132 100644 (file)
--- a/arch/arm/Kconfig
+++ b/arch/arm/Kconfig
@@ -703,6 +703,7 @@ config ARCH_SA1100
        select GENERIC_CLOCKEVENTS
        select HAVE_IDE
        select ISA
+       select MULTI_IRQ_HANDLER
        select NEED_MACH_MEMORY_H
        select SPARSE_IRQ
        help

diff --git a/arch/arm/mach-sa1100/irq.c b/arch/arm/mach-sa1100/irq.c
index 2124f1f..4a1bd5e 100644 (file)
--- a/arch/arm/mach-sa1100/irq.c
+++ b/arch/arm/mach-sa1100/irq.c
@@ -20,6 +20,7 @@
 #include <mach/hardware.h>
 #include <mach/irqs.h>
 #include <asm/mach/irq.h>
+#include <asm/exception.h>
 
 #include "generic.h"
 
@@ -291,6 +292,23 @@ static int __init sa1100irq_init_devicefs(void)
 
 device_initcall(sa1100irq_init_devicefs);
 
+static asmlinkage void __exception_irq_entry
+sa1100_handle_irq(struct pt_regs *regs)
+{
+       uint32_t icip, icmr, mask;
+
+       do {
+               icip = (ICIP);
+               icmr = (ICMR);
+               mask = icip & icmr;
+
+               if (mask == 0)
+                       break;
+
+               handle_IRQ(ffs(mask) - 1 + IRQ_GPIO0, regs);
+       } while (1);
+}
+
 void __init sa1100_init_irq(void)
 {
        unsigned int irq;
@@ -338,5 +356,7 @@ void __init sa1100_init_irq(void)
        irq_set_chip(IRQ_GPIO11_27, &sa1100_normal_chip);
        irq_set_chained_handler(IRQ_GPIO11_27, sa1100_high_gpio_handler);
 
+       set_handle_irq(sa1100_handle_irq);
+
        sa1100_init_gpio();
 }