1 files changed, 6 insertions, 0 deletions

diff --git a/include/linux/jiffies.h b/include/linux/jiffies.h
index 99905e180532..043376920f51 100644
--- a/include/linux/jiffies.h
+++ b/include/linux/jiffies.h
@@ -36,6 +36,8 @@
 /* LATCH is used in the interval timer and ftape setup. */
 #define LATCH  ((CLOCK_TICK_RATE + HZ/2) / HZ)  /* For divider */
 
+#define LATCH_HPET ((HPET_TICK_RATE + HZ/2) / HZ)
+
 /* Suppose we want to devide two numbers NOM and DEN: NOM/DEN, the we can
  * improve accuracy by shifting LSH bits, hence calculating:
  *     (NOM << LSH) / DEN
@@ -51,9 +53,13 @@
 /* HZ is the requested value. ACTHZ is actual HZ ("<< 8" is for accuracy) */
 #define ACTHZ (SH_DIV (CLOCK_TICK_RATE, LATCH, 8))
 
+#define ACTHZ_HPET (SH_DIV (HPET_TICK_RATE, LATCH_HPET, 8))
+
 /* TICK_NSEC is the time between ticks in nsec assuming real ACTHZ */
 #define TICK_NSEC (SH_DIV (1000000UL * 1000, ACTHZ, 8))
 
+#define TICK_NSEC_HPET (SH_DIV(1000000UL * 1000, ACTHZ_HPET, 8))
+
 /* TICK_USEC is the time between ticks in usec assuming fake USER_HZ */
 #define TICK_USEC ((1000000UL + USER_HZ/2) / USER_HZ)