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[PATCH] sh: Simple timer framework

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This builds on some of the clock framework code to support a simple system
timer interface.

Signed-off-by: Paul Mundt <lethal@linux-sh.org>
Cc: john stultz <johnstul@us.ibm.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
This commit is contained in:
Paul Mundt
2006-01-16 22:14:18 -08:00
committed by Linus Torvalds
parent 36ddf31b68
commit aa01666df3
4 changed files with 329 additions and 0 deletions
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50
arch/sh/kernel/timers/timer.c Normal file
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/*
* arch/sh/kernel/timers/timer.c - Common timer code
*
* Copyright (C) 2005 Paul Mundt
*
* This file is subject to the terms and conditions of the GNU General Public
* License. See the file "COPYING" in the main directory of this archive
* for more details.
*/
#include <linux/kernel.h>
#include <linux/init.h>
#include <linux/timer.h>
#include <linux/string.h>
#include <asm/timer.h>
static struct sys_timer *sys_timers[] __initdata = {
#ifdef CONFIG_SH_TMU
&tmu_timer,
#endif
NULL,
};
static char timer_override[10] __initdata;
static int __init timer_setup(char *str)
{
if (str)
strlcpy(timer_override, str, sizeof(timer_override));
return 1;
}
__setup("timer=", timer_setup);
struct sys_timer *get_sys_timer(void)
{
int i;
for (i = 0; i < ARRAY_SIZE(sys_timers); i++) {
struct sys_timer *t = sys_timers[i];
if (unlikely(!t))
break;
if (unlikely(timer_override[0]))
if ((strcmp(timer_override, t->name) != 0))
continue;
if (likely(t->ops->init() == 0))
return t;
}
return NULL;
}