162306a36Sopenharmony_ci// SPDX-License-Identifier: GPL-2.0-only 262306a36Sopenharmony_ci/* 362306a36Sopenharmony_ci * linux/drivers/clocksource/dummy_timer.c 462306a36Sopenharmony_ci * 562306a36Sopenharmony_ci * Copyright (C) 2013 ARM Ltd. 662306a36Sopenharmony_ci * All Rights Reserved 762306a36Sopenharmony_ci */ 862306a36Sopenharmony_ci#include <linux/clockchips.h> 962306a36Sopenharmony_ci#include <linux/cpu.h> 1062306a36Sopenharmony_ci#include <linux/init.h> 1162306a36Sopenharmony_ci#include <linux/percpu.h> 1262306a36Sopenharmony_ci#include <linux/cpumask.h> 1362306a36Sopenharmony_ci 1462306a36Sopenharmony_cistatic DEFINE_PER_CPU(struct clock_event_device, dummy_timer_evt); 1562306a36Sopenharmony_ci 1662306a36Sopenharmony_cistatic int dummy_timer_starting_cpu(unsigned int cpu) 1762306a36Sopenharmony_ci{ 1862306a36Sopenharmony_ci struct clock_event_device *evt = per_cpu_ptr(&dummy_timer_evt, cpu); 1962306a36Sopenharmony_ci 2062306a36Sopenharmony_ci evt->name = "dummy_timer"; 2162306a36Sopenharmony_ci evt->features = CLOCK_EVT_FEAT_PERIODIC | 2262306a36Sopenharmony_ci CLOCK_EVT_FEAT_ONESHOT | 2362306a36Sopenharmony_ci CLOCK_EVT_FEAT_DUMMY; 2462306a36Sopenharmony_ci evt->rating = 100; 2562306a36Sopenharmony_ci evt->cpumask = cpumask_of(cpu); 2662306a36Sopenharmony_ci 2762306a36Sopenharmony_ci clockevents_register_device(evt); 2862306a36Sopenharmony_ci return 0; 2962306a36Sopenharmony_ci} 3062306a36Sopenharmony_ci 3162306a36Sopenharmony_cistatic int __init dummy_timer_register(void) 3262306a36Sopenharmony_ci{ 3362306a36Sopenharmony_ci return cpuhp_setup_state(CPUHP_AP_DUMMY_TIMER_STARTING, 3462306a36Sopenharmony_ci "clockevents/dummy_timer:starting", 3562306a36Sopenharmony_ci dummy_timer_starting_cpu, NULL); 3662306a36Sopenharmony_ci} 3762306a36Sopenharmony_ciearly_initcall(dummy_timer_register); 38