diff options
Diffstat (limited to 'arch/avr32/include/asm/timex.h')
| -rw-r--r-- | arch/avr32/include/asm/timex.h | 39 |
1 files changed, 39 insertions, 0 deletions
diff --git a/arch/avr32/include/asm/timex.h b/arch/avr32/include/asm/timex.h new file mode 100644 index 000000000000..187dcf38b210 --- /dev/null +++ b/arch/avr32/include/asm/timex.h | |||
| @@ -0,0 +1,39 @@ | |||
| 1 | /* | ||
| 2 | * Copyright (C) 2004-2006 Atmel Corporation | ||
| 3 | * | ||
| 4 | * This program is free software; you can redistribute it and/or modify | ||
| 5 | * it under the terms of the GNU General Public License version 2 as | ||
| 6 | * published by the Free Software Foundation. | ||
| 7 | */ | ||
| 8 | #ifndef __ASM_AVR32_TIMEX_H | ||
| 9 | #define __ASM_AVR32_TIMEX_H | ||
| 10 | |||
| 11 | /* | ||
| 12 | * This is the frequency of the timer used for Linux's timer interrupt. | ||
| 13 | * The value should be defined as accurate as possible or under certain | ||
| 14 | * circumstances Linux timekeeping might become inaccurate or fail. | ||
| 15 | * | ||
| 16 | * For many system the exact clockrate of the timer isn't known but due to | ||
| 17 | * the way this value is used we can get away with a wrong value as long | ||
| 18 | * as this value is: | ||
| 19 | * | ||
| 20 | * - a multiple of HZ | ||
| 21 | * - a divisor of the actual rate | ||
| 22 | * | ||
| 23 | * 500000 is a good such cheat value. | ||
| 24 | * | ||
| 25 | * The obscure number 1193182 is the same as used by the original i8254 | ||
| 26 | * time in legacy PC hardware; the chip is never found in AVR32 systems. | ||
| 27 | */ | ||
| 28 | #define CLOCK_TICK_RATE 500000 /* Underlying HZ */ | ||
| 29 | |||
| 30 | typedef unsigned long cycles_t; | ||
| 31 | |||
| 32 | static inline cycles_t get_cycles (void) | ||
| 33 | { | ||
| 34 | return 0; | ||
| 35 | } | ||
| 36 | |||
| 37 | #define ARCH_HAS_READ_CURRENT_TIMER | ||
| 38 | |||
| 39 | #endif /* __ASM_AVR32_TIMEX_H */ | ||
