lib: time: export usec_to_tick()

In the UEFI Stall() boottime service we need access to usec_to_tick().

Export the function.

Remove redundant implementation in arch/arm/mach-rockchip/rk_timer.c.

Signed-off-by: Heinrich Schuchardt <xypron.glpk@gmx.de>

1 files changed, 9 insertions, 0 deletions

diff --git a/include/time.h b/include/time.h
index 9fd0d73fb4..1e9b369be7 100644
--- a/include/time.h
+++ b/include/time.h
@@ -4,6 +4,7 @@
 #define _TIME_H
 
 #include <linux/typecheck.h>
+#include <linux/types.h>
 
 unsigned long get_timer(unsigned long base);
 
@@ -21,6 +22,14 @@ unsigned long timer_get_us(void);
  */
 void timer_test_add_offset(unsigned long offset);
 
+/**
+ * usec_to_tick() - convert microseconds to clock ticks
+ *
+ * @usec:	duration in microseconds
+ * Return:	duration in clock ticks
+ */
+uint64_t usec_to_tick(unsigned long usec);
+
 /*
  *	These inlines deal with timer wrapping correctly. You are
  *	strongly encouraged to use them