1*d2912cb1SThomas Gleixner // SPDX-License-Identifier: GPL-2.0-only 206470651SMark Rutland /* 306470651SMark Rutland * linux/drivers/clocksource/dummy_timer.c 406470651SMark Rutland * 506470651SMark Rutland * Copyright (C) 2013 ARM Ltd. 606470651SMark Rutland * All Rights Reserved 706470651SMark Rutland */ 806470651SMark Rutland #include <linux/clockchips.h> 906470651SMark Rutland #include <linux/cpu.h> 1006470651SMark Rutland #include <linux/init.h> 1106470651SMark Rutland #include <linux/percpu.h> 1206470651SMark Rutland #include <linux/cpumask.h> 1306470651SMark Rutland 1406470651SMark Rutland static DEFINE_PER_CPU(struct clock_event_device, dummy_timer_evt); 1506470651SMark Rutland dummy_timer_starting_cpu(unsigned int cpu)1600c1d17aSRichard Cochranstatic int dummy_timer_starting_cpu(unsigned int cpu) 1706470651SMark Rutland { 1800c1d17aSRichard Cochran struct clock_event_device *evt = per_cpu_ptr(&dummy_timer_evt, cpu); 1906470651SMark Rutland 2006470651SMark Rutland evt->name = "dummy_timer"; 2106470651SMark Rutland evt->features = CLOCK_EVT_FEAT_PERIODIC | 2206470651SMark Rutland CLOCK_EVT_FEAT_ONESHOT | 2306470651SMark Rutland CLOCK_EVT_FEAT_DUMMY; 2406470651SMark Rutland evt->rating = 100; 2506470651SMark Rutland evt->cpumask = cpumask_of(cpu); 2606470651SMark Rutland 2706470651SMark Rutland clockevents_register_device(evt); 2800c1d17aSRichard Cochran return 0; 2906470651SMark Rutland } 3006470651SMark Rutland dummy_timer_register(void)3106470651SMark Rutlandstatic int __init dummy_timer_register(void) 3206470651SMark Rutland { 3300c1d17aSRichard Cochran return cpuhp_setup_state(CPUHP_AP_DUMMY_TIMER_STARTING, 3473c1b41eSThomas Gleixner "clockevents/dummy_timer:starting", 3500c1d17aSRichard Cochran dummy_timer_starting_cpu, NULL); 3606470651SMark Rutland } 3706470651SMark Rutland early_initcall(dummy_timer_register); 38