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authorKevin Hilman <khilman@mvista.com>2007-11-12 23:24:03 -0800
committerTony Lindgren <tony@atomide.com>2008-04-14 09:57:12 -0700
commitf258b0c6fa6ca653c7f4e6e2846dbb7ed3af3446 (patch)
treea5c89a4c4506ca87f99d4fd155633296302d0215 /arch/arm/plat-omap/common.c
parent5a3a388fbefac3705dfcde16c93fc81e6fd9378f (diff)
downloadlinux-linaro-stable-f258b0c6fa6ca653c7f4e6e2846dbb7ed3af3446.tar.gz
ARM: OMAP: Timer32K: Move 32k-based sched_clock() to common code
Since 32k timer code is moving to OMAP1 specific dir, move the 32k-based sched_clock() into common code where it is based on the 32k sync counter and can be used even when using MPU timer. While moving, change the ticks-to-nsecs conversion to use the helper functions provided by clocksource.h. Also removed the unused ticks_to_usec, leaving only ticks_to_nsec. Signed-off-by: Kevin Hilman <khilman@mvista.com> Signed-off-by: Tony Lindgren <tony@atomide.com>
Diffstat (limited to 'arch/arm/plat-omap/common.c')
-rw-r--r--arch/arm/plat-omap/common.c17
1 files changed, 17 insertions, 0 deletions
diff --git a/arch/arm/plat-omap/common.c b/arch/arm/plat-omap/common.c
index 4f0f9c4e938e..7f1cae16cfad 100644
--- a/arch/arm/plat-omap/common.c
+++ b/arch/arm/plat-omap/common.c
@@ -193,6 +193,23 @@ static struct clocksource clocksource_32k = {
.flags = CLOCK_SOURCE_IS_CONTINUOUS,
};
+/*
+ * Rounds down to nearest nsec.
+ */
+unsigned long long omap_32k_ticks_to_nsecs(unsigned long ticks_32k)
+{
+ return cyc2ns(&clocksource_32k, ticks_32k);
+}
+
+/*
+ * Returns current time from boot in nsecs. It's OK for this to wrap
+ * around for now, as it's just a relative time stamp.
+ */
+unsigned long long sched_clock(void)
+{
+ return omap_32k_ticks_to_nsecs(omap_32k_read());
+}
+
static int __init omap_init_clocksource_32k(void)
{
static char err[] __initdata = KERN_ERR