From: Kevin Hilman <khilman@xxxxxxxxxx>
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@xxxxxxxxxx>
Signed-off-by: Tony Lindgren <tony@xxxxxxxxxxx>
---
arch/arm/plat-omap/common.c | 17 +++++++++++++++++
arch/arm/plat-omap/timer32k.c | 26 --------------------------
2 files changed, 17 insertions(+), 26 deletions(-)
diff --git a/arch/arm/plat-omap/common.c b/arch/arm/plat-omap/common.c
index 4f0f9c4..7f1cae1 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
diff --git a/arch/arm/plat-omap/timer32k.c b/arch/arm/plat-omap/timer32k.c
index ce034dc..1f7365f 100644
--- a/arch/arm/plat-omap/timer32k.c
+++ b/arch/arm/plat-omap/timer32k.c
@@ -153,32 +153,6 @@ static inline unsigned long omap_32k_sync_timer_read(void)
return omap_readl(TIMER_32K_SYNCHRONIZED);
}
-/*
- * Rounds down to nearest usec. Note that this will overflow for larger values.
- */
-static inline unsigned long omap_32k_ticks_to_usecs(unsigned long ticks_32k)
-{
- return (ticks_32k * 5*5*5*5*5*5) >> 9;
-}
-
-/*
- * Rounds down to nearest nsec.
- */
-static inline unsigned long long
-omap_32k_ticks_to_nsecs(unsigned long ticks_32k)
-{
- return (unsigned long long) ticks_32k * 1000 * 5*5*5*5*5*5 >> 9;
-}
-
-/*
- * 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_sync_timer_read());
-}
-
static irqreturn_t omap_32k_timer_interrupt(int irq, void *dev_id)
{
struct clock_event_device *evt = &clockevent_32k_timer;
--
1.5.3.6
--
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