mirror of
https://github.com/u-boot/u-boot.git
synced 2025-05-07 04:39:20 +00:00
d678a59d2d
When bringing in the series 'arm: dts: am62-beagleplay: Fix Beagleplay Ethernet"' I failed to notice that b4 noticed it was based on next and so took that as the base commit and merged that part of next to master. This reverts commitc8ffd1356d, reversing changes made to2ee6f3a5f7. Reported-by: Jonas Karlman <jonas@kwiboo.se> Signed-off-by: Tom Rini <trini@konsulko.com>
76 lines
1.7 KiB
C
76 lines
1.7 KiB
C
// SPDX-License-Identifier: GPL-2.0+
|
|
/*
|
|
* (C) Copyright 2000, 2001
|
|
* Wolfgang Denk, DENX Software Engineering, wd@denx.de.
|
|
*/
|
|
|
|
#include <common.h>
|
|
#include <init.h>
|
|
#include <time.h>
|
|
#include <asm/io.h>
|
|
#include <linux/delay.h>
|
|
|
|
/* ------------------------------------------------------------------------- */
|
|
|
|
/*
|
|
* This function is intended for SHORT delays only.
|
|
* It will overflow at around 10 seconds @ 400MHz,
|
|
* or 20 seconds @ 200MHz.
|
|
*/
|
|
unsigned long usec2ticks(unsigned long usec)
|
|
{
|
|
ulong ticks;
|
|
|
|
if (usec < 1000) {
|
|
ticks = ((usec * (get_tbclk()/1000)) + 500) / 1000;
|
|
} else {
|
|
ticks = ((usec / 10) * (get_tbclk() / 100000));
|
|
}
|
|
|
|
return (ticks);
|
|
}
|
|
|
|
/* ------------------------------------------------------------------------- */
|
|
|
|
/*
|
|
* We implement the delay by converting the delay (the number of
|
|
* microseconds to wait) into a number of time base ticks; then we
|
|
* watch the time base until it has incremented by that amount.
|
|
*/
|
|
void __udelay(unsigned long usec)
|
|
{
|
|
ulong ticks = usec2ticks (usec);
|
|
wait_ticks (ticks);
|
|
}
|
|
|
|
/* ------------------------------------------------------------------------- */
|
|
#ifndef CONFIG_NAND_SPL
|
|
unsigned long ticks2usec(unsigned long ticks)
|
|
{
|
|
ulong tbclk = get_tbclk();
|
|
|
|
/* usec = ticks * 1000000 / tbclk
|
|
* Multiplication would overflow at ~4.2e3 ticks,
|
|
* so we break it up into
|
|
* usec = ( ( ticks * 1000) / tbclk ) * 1000;
|
|
*/
|
|
ticks *= 1000L;
|
|
ticks /= tbclk;
|
|
ticks *= 1000L;
|
|
|
|
return ((ulong)ticks);
|
|
}
|
|
#endif
|
|
/* ------------------------------------------------------------------------- */
|
|
|
|
int timer_init(void)
|
|
{
|
|
unsigned long temp;
|
|
|
|
/* reset */
|
|
asm volatile("li %0,0 ; mttbl %0 ; mttbu %0;"
|
|
: "=&r"(temp) );
|
|
|
|
return (0);
|
|
}
|
|
/* ------------------------------------------------------------------------- */
|