65 lines
1.8 KiB
C
65 lines
1.8 KiB
C
/*
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* Copyright (c) 2019 Samsung Electronics Co., Ltd All Rights Reserved
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*
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* This software is licensed under the terms of the GNU General Public
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* License version 2, as published by the Free Software Foundation, and
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* may be copied, distributed, and modified under those terms.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*/
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#include <linux/cpufreq.h>
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#include <linux/module.h>
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#include <linux/notifier.h>
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#include "core/iwservice.h"
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#include "core/log.h"
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#include "core/subsystem.h"
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#include "core/sysdep.h"
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static void cpufreq_trans_postchange_action(struct cpufreq_freqs *freqs)
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{
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#if LINUX_VERSION_CODE >= KERNEL_VERSION(5, 2, 0)
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unsigned int cpu;
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log_info(tzdev_cpufreq, "post-transition: cpumask %*pb, old %u, new %u\n",
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cpumask_pr_args(freqs->policy->cpus), freqs->old, freqs->new);
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for_each_cpu(cpu, freqs->policy->cpus)
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tz_iwservice_set_cpu_freq(cpu, freqs->new);
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#else
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log_info(tzdev_cpufreq, "post-transition: cpu %u old %u, new %u\n",
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freqs->cpu, freqs->old, freqs->new);
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tz_iwservice_set_cpu_freq(freqs->cpu, freqs->new);
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#endif
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}
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static int cpufreq_trans_callback(struct notifier_block *nb,
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unsigned long event, void *data)
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{
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struct cpufreq_freqs *freqs = data;
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log_info(tzdev_cpufreq, "transition callback event %lu\n", event);
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switch (event) {
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case CPUFREQ_POSTCHANGE:
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cpufreq_trans_postchange_action(freqs);
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break;
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}
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return NOTIFY_OK;
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}
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static struct notifier_block cpufreq_trans_notifier = {
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.notifier_call = cpufreq_trans_callback,
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};
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int cpufreq_trans_init(void)
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{
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return sysdep_cpufreq_register_notifier(&cpufreq_trans_notifier,
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CPUFREQ_TRANSITION_NOTIFIER);
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}
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tzdev_late_initcall(cpufreq_trans_init);
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