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v0.5.2
https://github.com/torvalds/linux
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Tip revision: 521a547ced6477c54b4b0cc206000406c221b4d6 authored by Linus Torvalds on 18 September 2022, 20:44:14 UTC
Linux 6.0-rc6
Tip revision: 521a547
delay.h
/*
 * This file is subject to the terms and conditions of the GNU General Public
 * License.  See the file "COPYING" in the main directory of this archive
 * for more details.
 *
 * Copyright (C) 1994 by Waldorf Electronics
 * Copyright (C) 1995 - 2000, 01, 03 by Ralf Baechle
 * Copyright (C) 1999, 2000 Silicon Graphics, Inc.
 * Copyright (C) 2007  Maciej W. Rozycki
 */
#ifndef _ASM_DELAY_H
#define _ASM_DELAY_H

#include <linux/param.h>

extern void __delay(unsigned long loops);
extern void __ndelay(unsigned long ns);
extern void __udelay(unsigned long us);

#define ndelay(ns) __ndelay(ns)
#define udelay(us) __udelay(us)

/* make sure "usecs *= ..." in udelay do not overflow. */
#if HZ >= 1000
#define MAX_UDELAY_MS	1
#elif HZ <= 200
#define MAX_UDELAY_MS	5
#else
#define MAX_UDELAY_MS	(1000 / HZ)
#endif

#endif /* _ASM_DELAY_H */
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