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[ARM] S3C24XX: Split timer pending code out

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Split the timer pending code out to a seperate per-machine
header so that when compiling for mach-s3c2410 or mach-s3c24a0
we can use the right timer code without having to #ifdef the
timer driver.

Signed-off-by: Ben Dooks <ben-linux@fluff.org>
This commit is contained in:
Ben Dooks 2008-10-21 14:06:35 +01:00
parent bcae8aeb32
commit 9bc1aaeac0
3 changed files with 32 additions and 5 deletions
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15
arch/arm/mach-s3c2410/include/mach/tick.h Normal file
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@ -0,0 +1,15 @@
/* linux/arch/arm/mach-s3c2410/include/mach/tick.h
*
* Copyright 2008 Simtec Electronics
* Ben Dooks <ben@simtec.co.uk>
* http://armlinux.simtec.co.uk/
*
* S3C2410 - timer tick support
*/
#define SRCPND_TIMER4 (1<<(IRQ_TIMER4 - IRQ_EINT0))
static inline int s3c24xx_ostimer_pending(void)
{
return __raw_readl(S3C2410_SRCPND) & SRCPND_TIMER4;
}

15
arch/arm/mach-s3c24a0/include/mach/tick.h Normal file
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@ -0,0 +1,15 @@
/* linux/arch/arm/mach-s3c24a0/include/mach/tick.h
*
* Copyright 2008 Simtec Electronics
* Ben Dooks <ben@simtec.co.uk>
* http://armlinux.simtec.co.uk/
*
* S3C24A0 - timer tick support
*/
#define SUBSRC_TIMER4 (1 << (IRQ_TIMER4 - IRQ_S3CUART_RX0))
static inline int s3c24xx_ostimer_pending(void)
{
return __raw_readl(S3C2410_SUBSRCPND) & SUBSRC_TIMER4;
}

7
arch/arm/plat-s3c/time.c
View File

@ -36,6 +36,7 @@
#include <plat/regs-timer.h>
#include <mach/regs-irq.h>
#include <asm/mach/time.h>
#include <mach/tick.h>
#include <plat/clock.h>
#include <plat/cpu.h>
@ -91,12 +92,9 @@ static inline unsigned long timer_ticks_to_usec(unsigned long ticks)
* IRQs are disabled before entering here from do_gettimeofday()
*/
#define SRCPND_TIMER4 (1<<(IRQ_TIMER4 - IRQ_EINT0))
static unsigned long s3c2410_gettimeoffset (void)
{
unsigned long tdone;
unsigned long irqpend;
unsigned long tval;
/* work out how many ticks have gone since last timer interrupt */
@ -106,8 +104,7 @@ static unsigned long s3c2410_gettimeoffset (void)
/* check to see if there is an interrupt pending */
irqpend = __raw_readl(S3C2410_SRCPND);
if (irqpend & SRCPND_TIMER4) {
if (s3c24xx_ostimer_pending()) {
/* re-read the timer, and try and fix up for the missed
* interrupt. Note, the interrupt may go off before the
* timer has re-loaded from wrapping.