[mirror_ubuntu-zesty-kernel.git] / include / asm-avr32 / timex.h

/*
 * Copyright (C) 2004-2006 Atmel Corporation
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License version 2 as
 * published by the Free Software Foundation.
 */
#ifndef __ASM_AVR32_TIMEX_H
#define __ASM_AVR32_TIMEX_H

/*
 * This is the frequency of the timer used for Linux's timer interrupt.
 * The value should be defined as accurate as possible or under certain
 * circumstances Linux timekeeping might become inaccurate or fail.
 *
 * For many system the exact clockrate of the timer isn't known but due to
 * the way this value is used we can get away with a wrong value as long
 * as this value is:
 *
 *  - a multiple of HZ
 *  - a divisor of the actual rate
 *
 * 500000 is a good such cheat value.
 *
 * The obscure number 1193182 is the same as used by the original i8254
 * time in legacy PC hardware; the chip is never found in AVR32 systems.
 */
#define CLOCK_TICK_RATE		500000	/* Underlying HZ */

typedef unsigned long cycles_t;

static inline cycles_t get_cycles (void)
{
	return 0;
}

#define ARCH_HAS_READ_CURRENT_TIMER

#endif /* __ASM_AVR32_TIMEX_H */
Commit	Line	Data
5f97f7f9 HS	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
941e492b	37	#define ARCH_HAS_READ_CURRENT_TIMER
5f97f7f9 HS	38
5f97f7f9 HS	39	#endif /* __ASM_AVR32_TIMEX_H */