[PATCH] sh: Simple timer framework

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>

1 files changed, 50 insertions, 0 deletions

diff --git a/arch/sh/kernel/timers/timer.c b/arch/sh/kernel/timers/timer.c
new file mode 100644
index 000000000000..dc1f631053a8
--- /dev/null
+++ b/arch/sh/kernel/timers/timer.c
@@ -0,0 +1,50 @@
+/*
+ * 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;
+}
+