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