43 lines
926 B
C
43 lines
926 B
C
|
// SPDX-License-Identifier: GPL-2.0-only
|
||
|
|
/*
|
||
|
|
* linux/arch/arm/kernel/arch_timer.c
|
||
|
|
*
|
||
|
|
* Copyright (C) 2011 ARM Ltd.
|
||
|
|
* All Rights Reserved
|
||
|
|
*/
|
||
|
|
#include <linux/init.h>
|
||
|
|
#include <linux/types.h>
|
||
|
|
#include <linux/errno.h>
|
||
|
|
|
||
|
|
#include <asm/delay.h>
|
||
|
|
#include <asm/arch_timer.h>
|
||
|
|
|
||
|
|
#include <clocksource/arm_arch_timer.h>
|
||
|
|
|
||
|
|
static unsigned long arch_timer_read_counter_long(void)
|
||
|
|
{
|
||
|
|
return arch_timer_read_counter();
|
||
|
|
}
|
||
|
|
|
||
|
|
static struct delay_timer arch_delay_timer;
|
||
|
|
|
||
|
|
static void __init arch_timer_delay_timer_register(void)
|
||
|
|
{
|
||
|
|
/* Use the architected timer for the delay loop. */
|
||
|
|
arch_delay_timer.read_current_timer = arch_timer_read_counter_long;
|
||
|
|
arch_delay_timer.freq = arch_timer_get_rate();
|
||
|
|
register_current_timer_delay(&arch_delay_timer);
|
||
|
|
}
|
||
|
|
|
||
|
|
int __init arch_timer_arch_init(void)
|
||
|
|
{
|
||
|
|
u32 arch_timer_rate = arch_timer_get_rate();
|
||
|
|
|
||
|
|
if (arch_timer_rate == 0)
|
||
|
|
return -ENXIO;
|
||
|
|
|
||
|
|
arch_timer_delay_timer_register();
|
||
|
|
|
||
|
|
return 0;
|
||
|
|
}
|