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ixp4xx: timer and clocks cleanups 

This patch does a few simple cleanups of the ixp4xx timer
and clocksource/clockevent code in mach-ixp4xx/common.c:

- ixp4xx_clocksource_init() is static and always returns 0,
  which is ignored by its only caller: make it return void
- ixp4xx_clockevent_init(): ditto
- ixp4xx_get_cycles() is only referenced locally: make it static
- use the ixp4xx_timer_irq.dev_id field to pass &clockevent_ixp4xx
  to ixp4xx_timer_interrupt() via its dev_id parameter, allowing
  the code in ixp4xx_timer_interrupt() to be smaller and faster

Tested on an ixp420 machine (ds101).

Signed-off-by: Mikael Pettersson <mikpe@it.uu.se>
Signed-off-by: Krzysztof Hałasa <khc@pm.waw.pl>
This commit is contained in:
Mikael Pettersson 2009-09-11 00:59:07 +02:00 committed by Krzysztof Hałasa
parent 43c1266ce4
commit ceb69a899f
1 changed files with 7 additions and 9 deletions
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16
arch/arm/mach-ixp4xx/common.c
View File

@ -41,8 +41,8 @@
#include <asm/mach/irq.h>
#include <asm/mach/time.h>
static int __init ixp4xx_clocksource_init(void);
static int __init ixp4xx_clockevent_init(void);
static void __init ixp4xx_clocksource_init(void);
static void __init ixp4xx_clockevent_init(void);
static struct clock_event_device clockevent_ixp4xx;
/*************************************************************************
@ -267,7 +267,7 @@ void __init ixp4xx_init_irq(void)
static irqreturn_t ixp4xx_timer_interrupt(int irq, void *dev_id)
{
struct clock_event_device *evt = &clockevent_ixp4xx;
struct clock_event_device *evt = dev_id;
/* Clear Pending Interrupt by writing '1' to it */
*IXP4XX_OSST = IXP4XX_OSST_TIMER_1_PEND;
@ -281,6 +281,7 @@ static struct irqaction ixp4xx_timer_irq = {
.name = "timer1",
.flags = IRQF_DISABLED | IRQF_TIMER | IRQF_IRQPOLL,
.handler = ixp4xx_timer_interrupt,
.dev_id = &clockevent_ixp4xx,
};
void __init ixp4xx_timer_init(void)
@ -401,7 +402,7 @@ void __init ixp4xx_sys_init(void)
/*
* clocksource
*/
cycle_t ixp4xx_get_cycles(struct clocksource *cs)
static cycle_t ixp4xx_get_cycles(struct clocksource *cs)
{
return *IXP4XX_OSTS;
}
@ -417,14 +418,12 @@ static struct clocksource clocksource_ixp4xx = {
unsigned long ixp4xx_timer_freq = FREQ;
EXPORT_SYMBOL(ixp4xx_timer_freq);
static int __init ixp4xx_clocksource_init(void)
static void __init ixp4xx_clocksource_init(void)
{
clocksource_ixp4xx.mult =
clocksource_hz2mult(ixp4xx_timer_freq,
clocksource_ixp4xx.shift);
clocksource_register(&clocksource_ixp4xx);
return 0;
}
/*
@ -480,7 +479,7 @@ static struct clock_event_device clockevent_ixp4xx = {
.set_next_event = ixp4xx_set_next_event,
};
static int __init ixp4xx_clockevent_init(void)
static void __init ixp4xx_clockevent_init(void)
{
clockevent_ixp4xx.mult = div_sc(FREQ, NSEC_PER_SEC,
clockevent_ixp4xx.shift);
@ -491,5 +490,4 @@ static int __init ixp4xx_clockevent_init(void)
clockevent_ixp4xx.cpumask = cpumask_of(0);
clockevents_register_device(&clockevent_ixp4xx);
return 0;
}