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Commit e1b4d114 authored by Ingo Molnar's avatar Ingo Molnar
Browse files

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: default avatarIngo Molnar <mingo@elte.hu>
parent ff4ce8c3

arch/x86/include/asm/timex.h

+4 −9
Original line number Diff line number Diff line 
/* 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

/* 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