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| author | Ralf Baechle <ralf@linux-mips.org> | 2011-06-01 19:05:07 +0100 |
|---|---|---|
| committer | Thomas Gleixner <tglx@linutronix.de> | 2011-06-09 15:01:40 +0200 |
| commit | 49cf3f29a1ef2e59f1be823e376c1fbac586eb8d (patch) | |
| tree | df74a086f491e08317e1fe88c5c160f7eef7d7f0 /include/linux/i8253.h | |
| parent | 16f871bc30f86560017b9d34520593a28e08f373 (diff) | |
| download | lwn-49cf3f29a1ef2e59f1be823e376c1fbac586eb8d.tar.gz lwn-49cf3f29a1ef2e59f1be823e376c1fbac586eb8d.zip | |
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.h | 4 |
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 |