[PATCH RESEND 2.6.31] ixp4xx: timer and clocks cleanups
Mikael Pettersson
mikpe at it.uu.se
Fri Sep 11 05:38:35 EDT 2009
[2nd attempt to send this, we seem to be having major issues
with outgoing email, my apologies if you see this twice]
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 at it.uu.se>
---
arch/arm/mach-ixp4xx/common.c | 16 +++++++---------
1 file changed, 7 insertions(+), 9 deletions(-)
diff -rupN linux-2.6.31/arch/arm/mach-ixp4xx/common.c linux-2.6.31.arm-ixp4xx-timer-cleanups/arch/arm/mach-ixp4xx/common.c
--- linux-2.6.31/arch/arm/mach-ixp4xx/common.c 2009-06-10 12:00:43.000000000 +0200
+++ linux-2.6.31.arm-ixp4xx-timer-cleanups/arch/arm/mach-ixp4xx/common.c 2009-09-10 23:25:06.000000000 +0200
@@ -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;
}
@@ -416,14 +417,12 @@ static struct clocksource clocksource_ix
};
unsigned long ixp4xx_timer_freq = 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;
}
/*
@@ -479,7 +478,7 @@ static struct clock_event_device clockev
.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);
@@ -490,5 +489,4 @@ static int __init ixp4xx_clockevent_init
clockevent_ixp4xx.cpumask = cpumask_of(0);
clockevents_register_device(&clockevent_ixp4xx);
- return 0;
}
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