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1// SPDX-License-Identifier: GPL-2.0-only2/*3 * linux/drivers/clocksource/dummy_timer.c4 *5 * Copyright (C) 2013 ARM Ltd.6 * All Rights Reserved7 */8#include <linux/clockchips.h>9#include <linux/cpu.h>10#include <linux/init.h>11#include <linux/percpu.h>12#include <linux/cpumask.h>13 14static DEFINE_PER_CPU(struct clock_event_device, dummy_timer_evt);15 16static int dummy_timer_starting_cpu(unsigned int cpu)17{18 struct clock_event_device *evt = per_cpu_ptr(&dummy_timer_evt, cpu);19 20 evt->name = "dummy_timer";21 evt->features = CLOCK_EVT_FEAT_PERIODIC |22 CLOCK_EVT_FEAT_ONESHOT |23 CLOCK_EVT_FEAT_DUMMY;24 evt->rating = 100;25 evt->cpumask = cpumask_of(cpu);26 27 clockevents_register_device(evt);28 return 0;29}30 31static int __init dummy_timer_register(void)32{33 return cpuhp_setup_state(CPUHP_AP_DUMMY_TIMER_STARTING,34 "clockevents/dummy_timer:starting",35 dummy_timer_starting_cpu, NULL);36}37early_initcall(dummy_timer_register);38