mirror of
https://github.com/AsahiLinux/u-boot
synced 2024-12-22 11:13:07 +00:00
6717e15447
<common.h> pulls in a lot of bloat. <common.h> is unneeded in most of places. Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com> Reviewed-by: Simon Glass <sjg@chromium.org>
39 lines
816 B
C
39 lines
816 B
C
// SPDX-License-Identifier: GPL-2.0+
|
|
/*
|
|
* Copyright (C) 2012-2015 Masahiro Yamada <yamada.masahiro@socionext.com>
|
|
*/
|
|
|
|
#include <config.h>
|
|
#include <init.h>
|
|
#include <linux/io.h>
|
|
|
|
#include "arm-mpcore.h"
|
|
|
|
#define PERIPHCLK (50 * 1000 * 1000) /* 50 MHz */
|
|
#define PRESCALER ((PERIPHCLK) / (CONFIG_SYS_TIMER_RATE) - 1)
|
|
|
|
static void *get_global_timer_base(void)
|
|
{
|
|
void *val;
|
|
|
|
asm("mrc p15, 4, %0, c15, c0, 0" : "=r" (val) : : "memory");
|
|
|
|
return val + GLOBAL_TIMER_OFFSET;
|
|
}
|
|
|
|
unsigned long timer_read_counter(void)
|
|
{
|
|
/*
|
|
* ARM 64bit Global Timer is too much for our purpose.
|
|
* We use only lower 32 bit of the timer counter.
|
|
*/
|
|
return readl(get_global_timer_base() + GTIMER_CNT_L);
|
|
}
|
|
|
|
int timer_init(void)
|
|
{
|
|
/* enable timer */
|
|
writel(PRESCALER << 8 | 1, get_global_timer_base() + GTIMER_CTRL);
|
|
|
|
return 0;
|
|
}
|