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authorRalf Baechle <ralf@linux-mips.org>2011-06-01 22:05:07 +0400
committerThomas Gleixner <tglx@linutronix.de>2011-06-09 17:01:40 +0400
commit49cf3f29a1ef2e59f1be823e376c1fbac586eb8d (patch)
treedf74a086f491e08317e1fe88c5c160f7eef7d7f0 /include/linux/i8253.h
parent16f871bc30f86560017b9d34520593a28e08f373 (diff)
downloadlinux-49cf3f29a1ef2e59f1be823e376c1fbac586eb8d.tar.xz
i8253: Consolidate definitions of PIT_LATCH
x86 defines PIT_LATCH as LATCH which in <linux/timex.h> is defined as ((CLOCK_TICK_RATE + HZ/2) / HZ) and <asm/timex.h> again defines CLOCK_TICK_RATE as PIT_TICK_RATE. MIPS defines PIT_LATCH as LATCH which in <linux/timex.h> is defined as ((CLOCK_TICK_RATE + HZ/2) / HZ) and <asm/timex.h> again defines CLOCK_TICK_RATE as 1193182. ARM defines PITCH_LATCH as ((PIT_TICK_RATE + HZ / 2) / HZ) - and that's the sanest thing and equivalent to above definitions so use that as the new definition in <linux/i8253.h>. Signed-off-by: Ralf Baechle <ralf@linux-mips.org> Cc: Russell King <linux@arm.linux.org.uk> Cc: linux-arm-kernel@lists.infradead.org Cc: linux-mips@linux-mips.org Link: http://lkml.kernel.org/r/20110601180610.832810002@duck.linux-mips.net Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Diffstat (limited to 'include/linux/i8253.h')
-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 13048d335368..1ec6323a1507 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