2 files changed, 60 insertions, 3 deletions

diff --git a/arch/mips/sgi-ip27/ip27-irq.c b/arch/mips/sgi-ip27/ip27-irq.c
index 2e643d2f51cb..0b61a39ce2bb 100644
--- a/arch/mips/sgi-ip27/ip27-irq.c
+++ b/arch/mips/sgi-ip27/ip27-irq.c
@@ -360,7 +360,7 @@ static struct hw_interrupt_type bridge_irq_type = {
 
 static unsigned long irq_map[NR_IRQS / BITS_PER_LONG];
 
-static int allocate_irqno(void)
+int allocate_irqno(void)
 {
         int irq;
 
diff --git a/arch/mips/sgi-ip27/ip27-timer.c b/arch/mips/sgi-ip27/ip27-timer.c
index 36b662e27b6e..1fb860c7ac6d 100644
--- a/arch/mips/sgi-ip27/ip27-timer.c
+++ b/arch/mips/sgi-ip27/ip27-timer.c
@@ -89,11 +89,13 @@ static int set_rtc_mmss(unsigned long nowtime)
 }
 #endif
 
+static unsigned int rt_timer_irq;
+
 void ip27_rt_timer_interrupt(struct pt_regs *regs)
 {
         int cpu = smp_processor_id();
         int cpuA = cputoslice(cpu) == 0;
-        int irq = 9;                            /* XXX Assign number */
+        unsigned int irq = rt_timer_irq;
 
         irq_enter();
         write_seqlock(&xtime_lock);
@@ -179,13 +181,68 @@ static __init unsigned long get_m48t35_time(void)
         return mktime(year, month, date, hour, min, sec);
 }
 
+static void startup_rt_irq(unsigned int irq)
+{
+}
+
+static void shutdown_rt_irq(unsigned int irq)
+{
+}
+
+static void enable_rt_irq(unsigned int irq)
+{
+}
+
+static void disable_rt_irq(unsigned int irq)
+{
+}
+
+static void mask_and_ack_rt(unsigned int irq)
+{
+}
+
+static void end_rt_irq(unsigned int irq)
+{
+}
+
+static struct hw_interrupt_type rt_irq_type = {
+        .typename       = "SN HUB RT timer",
+        .startup        = startup_rt_irq,
+        .shutdown       = shutdown_rt_irq,
+        .enable         = enable_rt_irq,
+        .disable        = disable_rt_irq,
+        .ack            = mask_and_ack_rt,
+        .end            = end_rt_irq,
+};
+
+static struct irqaction rt_irqaction = {
+        .handler        = ip27_rt_timer_interrupt,
+        .flags          = SA_INTERRUPT,
+        .mask           = CPU_MASK_NONE,
+        .name           = "timer"
+};
+
+extern int allocate_irqno(void);
+
 static void ip27_timer_setup(struct irqaction *irq)
 {
+        int irqno  = allocate_irqno();
+
+        if (irqno < 0)
+                panic("Can't allocate interrupt number for timer interrupt");
+
+        irq_desc[irqno].status = IRQ_DISABLED;
+        irq_desc[irqno].action = NULL;
+        irq_desc[irqno].depth = 1;
+        irq_desc[irqno].handler = &rt_irq_type;
+
         /* over-write the handler, we use our own way */
         irq->handler = no_action;
 
         /* setup irqaction */
-//      setup_irq(IP27_TIMER_IRQ, irq);         /* XXX Can't do this yet.  */
+        irq_desc[irqno].status |= IRQ_PER_CPU;
+
+        rt_timer_irq = irqno;
 }
 
 void __init ip27_time_init(void)