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authorUwe Kleine-König <ukleinek@informatik.uni-freiburg.de>2007-08-07 20:08:21 (GMT)
committerRussell King <rmk+kernel@arm.linux.org.uk>2007-10-12 22:43:11 (GMT)
commitbf62e8626963d0002315facb786a8833d404e21e (patch)
tree942ee4379efec27289d8c06a28b374bd0d9181b2 /arch/arm/mach-ns9xxx
parent9f1ccefe3f74e642515ba58868cfd6924056d9a8 (diff)
downloadlinux-bf62e8626963d0002315facb786a8833d404e21e.tar.xz
[ARM] 4545/1: ns9xxx: simplify irq ack'ing
Now the drivers are responsible to clear the irq in the respective device, which seems to be the normal thing to do. So the ack'ing of the timer irq moved to time.c. Signed-off-by: Uwe Kleine-König <ukleinek@informatik.uni-freiburg.de> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
Diffstat (limited to 'arch/arm/mach-ns9xxx')
-rw-r--r--arch/arm/mach-ns9xxx/irq.c33
-rw-r--r--arch/arm/mach-ns9xxx/time.c14
2 files changed, 14 insertions, 33 deletions
diff --git a/arch/arm/mach-ns9xxx/irq.c b/arch/arm/mach-ns9xxx/irq.c
index b8c7b00..24d424e 100644
--- a/arch/arm/mach-ns9xxx/irq.c
+++ b/arch/arm/mach-ns9xxx/irq.c
@@ -17,33 +17,6 @@
#include "generic.h"
-static void ns9xxx_ack_irq_timer(unsigned int irq)
-{
- u32 tc = SYS_TC(irq - IRQ_TIMER0);
-
- /*
- * If the timer is programmed to halt on terminal count, the
- * timer must be disabled before clearing the interrupt.
- */
- if (REGGET(tc, SYS_TCx, REN) == 0) {
- REGSET(tc, SYS_TCx, TEN, DIS);
- SYS_TC(irq - IRQ_TIMER0) = tc;
- }
-
- REGSET(tc, SYS_TCx, INTC, SET);
- SYS_TC(irq - IRQ_TIMER0) = tc;
-
- REGSET(tc, SYS_TCx, INTC, UNSET);
- SYS_TC(irq - IRQ_TIMER0) = tc;
-}
-
-static void (*ns9xxx_ack_irq_functions[NR_IRQS])(unsigned int) = {
- [IRQ_TIMER0] = ns9xxx_ack_irq_timer,
- [IRQ_TIMER1] = ns9xxx_ack_irq_timer,
- [IRQ_TIMER2] = ns9xxx_ack_irq_timer,
- [IRQ_TIMER3] = ns9xxx_ack_irq_timer,
-};
-
static void ns9xxx_mask_irq(unsigned int irq)
{
/* XXX: better use cpp symbols */
@@ -52,12 +25,6 @@ static void ns9xxx_mask_irq(unsigned int irq)
static void ns9xxx_ack_irq(unsigned int irq)
{
- if (!ns9xxx_ack_irq_functions[irq]) {
- printk(KERN_ERR "no ack function for irq %u\n", irq);
- BUG();
- }
-
- ns9xxx_ack_irq_functions[irq](irq);
SYS_ISRADDR = 0;
}
diff --git a/arch/arm/mach-ns9xxx/time.c b/arch/arm/mach-ns9xxx/time.c
index b97d0c5..3327d30 100644
--- a/arch/arm/mach-ns9xxx/time.c
+++ b/arch/arm/mach-ns9xxx/time.c
@@ -24,10 +24,24 @@ static u32 usecs_per_tick;
static irqreturn_t
ns9xxx_timer_interrupt(int irq, void *dev_id)
{
+ int timerno = irq - IRQ_TIMER0;
+ u32 tc;
+
write_seqlock(&xtime_lock);
timer_tick();
write_sequnlock(&xtime_lock);
+ /* clear irq */
+ tc = SYS_TC(timerno);
+ if (REGGET(tc, SYS_TCx, REN) == SYS_TCx_REN_DIS) {
+ REGSET(tc, SYS_TCx, TEN, DIS);
+ SYS_TC(timerno) = tc;
+ }
+ REGSET(tc, SYS_TCx, INTC, SET);
+ SYS_TC(timerno) = tc;
+ REGSET(tc, SYS_TCx, INTC, UNSET);
+ SYS_TC(timerno) = tc;
+
return IRQ_HANDLED;
}