u-boot/include/linux/delay.h
Masahiro Yamada 5bc516ed66 delay: collect {m, n, u}delay declarations to include/linux/delay.h
Currently, mdelay() and udelay() are declared in include/common.h,
while ndelay() in include/linux/compat.h.  It would be nice to
collect them into include/linux/delay.h like Linux.

While we are here, fix the ndelay() implementation; I used the
DIV_ROUND_UP() instead of (x)/1000 because it must wait *longer*
than the given period of time.

Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
Reviewed-by: Simon Glass <sjg@chromium.org>
2017-01-14 16:46:28 -05:00

24 lines
394 B
C

/*
* SPDX-License-Identifier: GPL-2.0+
*/
#ifndef _LINUX_DELAY_H
#define _LINUX_DELAY_H
#include <linux/kernel.h>
void __udelay(unsigned long usec);
void udelay(unsigned long usec);
static inline void mdelay(unsigned long msec)
{
while (msec--)
udelay(1000);
}
static inline void ndelay(unsigned long nsec)
{
udelay(DIV_ROUND_UP(nsec, 1000));
}
#endif /* defined(_LINUX_DELAY_H) */