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[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>
This commit is contained in:
Uwe Kleine-König 2007-08-07 21:08:21 +01:00 committed by Russell King
parent 9f1ccefe3f
commit bf62e86269
2 changed files with 14 additions and 33 deletions
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33
arch/arm/mach-ns9xxx/irq.c
View File

@ -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;
}

14
arch/arm/mach-ns9xxx/time.c
View File

@ -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;
}