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| author | Ingo Molnar <mingo@elte.hu> | 2009-01-25 16:57:00 +0100 |
|---|---|---|
| committer | Ingo Molnar <mingo@elte.hu> | 2009-01-25 16:57:47 +0100 |
| commit | e1b4d1143651fb3838be1117785b6e0386fa151f (patch) | |
| tree | 97fbbe38a97798398773fff8b0cae47c33c8a2dd /arch | |
| parent | ff4ce8c332859508dc97826ab8b7f42bb9c212c9 (diff) | |
| download | linux-stable-e1b4d1143651fb3838be1117785b6e0386fa151f.tar.gz linux-stable-e1b4d1143651fb3838be1117785b6e0386fa151f.tar.bz2 linux-stable-e1b4d1143651fb3838be1117785b6e0386fa151f.zip | |
x86: use standard PIT frequency
the RDC and ELAN platforms use slighly different PIT clocks, resulting in
a timex.h hack that changes PIT_TICK_RATE during build time. But if a
tester enables any of these platform support .config options, the PIT
will be miscalibrated on standard PC platforms.
So use one frequency - in a subsequent patch we'll add a quirk to allow
x86 platforms to define different PIT frequencies.
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Diffstat (limited to 'arch')
| -rw-r--r-- | arch/x86/include/asm/timex.h | 13 |
1 files changed, 4 insertions, 9 deletions
diff --git a/arch/x86/include/asm/timex.h b/arch/x86/include/asm/timex.h index 1287dc1347d6..b5c9d45c981f 100644 --- a/arch/x86/include/asm/timex.h +++ b/arch/x86/include/asm/timex.h @@ -1,18 +1,13 @@ -/* x86 architecture timex specifications */ #ifndef _ASM_X86_TIMEX_H #define _ASM_X86_TIMEX_H #include <asm/processor.h> #include <asm/tsc.h> -#ifdef CONFIG_X86_ELAN -# define PIT_TICK_RATE 1189200 /* AMD Elan has different frequency! */ -#elif defined(CONFIG_X86_RDC321X) -# define PIT_TICK_RATE 1041667 /* Underlying HZ for R8610 */ -#else -# define PIT_TICK_RATE 1193182 /* Underlying HZ */ -#endif -#define CLOCK_TICK_RATE PIT_TICK_RATE +/* The PIT ticks at this frequency (in HZ): */ +#define PIT_TICK_RATE 1193182 + +#define CLOCK_TICK_RATE PIT_TICK_RATE #define ARCH_HAS_READ_CURRENT_TIMER |