1 files changed, 13 insertions, 33 deletions

diff --git a/arch/mips/sgi-ip27/ip27-timer.c b/arch/mips/sgi-ip27/ip27-timer.c
index 4e870fc4469..7d361726bbf 100644
--- a/arch/mips/sgi-ip27/ip27-timer.c
+++ b/arch/mips/sgi-ip27/ip27-timer.c
@@ -134,13 +134,6 @@ again:
 	irq_exit();
 }
 
-unsigned long ip27_do_gettimeoffset(void)
-{
-	unsigned long ct_cur1;
-	ct_cur1 = REMOTE_HUB_L(cputonasid(0), PI_RT_COUNT) + CYCLES_PER_JIFFY;
-	return (ct_cur1 - ct_cur[0]) * NSEC_PER_CYCLE / 1000;
-}
-
 /* Includes for ioc3_init().  */
 #include <asm/sn/types.h>
 #include <asm/sn/sn0/addrs.h>
@@ -179,15 +172,6 @@ static __init unsigned long get_m48t35_time(void)
         return mktime(year, month, date, hour, min, sec);
 }
 
-static unsigned int startup_rt_irq(unsigned int irq)
-{
-	return 0;
-}
-
-static void shutdown_rt_irq(unsigned int irq)
-{
-}
-
 static void enable_rt_irq(unsigned int irq)
 {
 }
@@ -196,21 +180,17 @@ 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 irq_chip 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,
+	.ack		= disable_rt_irq,
+	.mask		= disable_rt_irq,
+	.mask_ack	= disable_rt_irq,
+	.unmask		= enable_rt_irq,
+	.eoi		= enable_rt_irq,
 	.end		= end_rt_irq,
 };
 
@@ -221,8 +201,6 @@ static struct irqaction rt_irqaction = {
 	.name		= "timer"
 };
 
-extern int allocate_irqno(void);
-
 void __init plat_timer_setup(struct irqaction *irq)
 {
 	int irqno  = allocate_irqno();
@@ -230,10 +208,7 @@ void __init plat_timer_setup(struct irqaction *irq)
 	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].chip	= &rt_irq_type;
+	set_irq_chip_and_handler(irqno, &rt_irq_type, handle_percpu_irq);
 
 	/* over-write the handler, we use our own way */
 	irq->handler = no_action;
@@ -248,12 +223,17 @@ void __init plat_timer_setup(struct irqaction *irq)
 	setup_irq(irqno, &rt_irqaction);
 }
 
+static cycle_t ip27_hpt_read(void)
+{
+	return REMOTE_HUB_L(cputonasid(0), PI_RT_COUNT);
+}
+
 void __init ip27_time_init(void)
 {
+	clocksource_mips.read = ip27_hpt_read;
+	mips_hpt_frequency = CYCLES_PER_SEC;
 	xtime.tv_sec = get_m48t35_time();
 	xtime.tv_nsec = 0;
-
-	do_gettimeoffset = ip27_do_gettimeoffset;
 }
 
 void __init cpu_time_init(void)