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-rw-r--r--include/linux/i8253.h4
1 files changed, 4 insertions, 0 deletions
diff --git a/include/linux/i8253.h b/include/linux/i8253.h
index 13048d33536..1ec6323a150 100644
--- a/include/linux/i8253.h
+++ b/include/linux/i8253.h
@@ -9,7 +9,9 @@
#ifndef __LINUX_I8253_H
#define __LINUX_I8253_H
+#include <linux/param.h>
#include <linux/spinlock.h>
+#include <linux/timex.h>
#include <asm/i8253.h>
/* i8253A PIT registers */
@@ -17,6 +19,8 @@
#define PIT_CH0 0x40
#define PIT_CH2 0x42
+#define PIT_LATCH ((PIT_TICK_RATE + HZ/2) / HZ)
+
#define inb_pit inb_p
#define outb_pit outb_p