63 lines
1.6 KiB
C
63 lines
1.6 KiB
C
/* Copyright (c) 2011-2013, The Linux Foundation. All rights reserved.
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License version 2 and
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* only version 2 as published by the Free Software Foundation.
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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/cpu.h>
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#include <linux/smp.h>
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#include "acpuclock.h"
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#include <trace/events/power.h>
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static struct acpuclk_data *acpuclk_data;
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unsigned long acpuclk_get_rate(int cpu)
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{
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if (!acpuclk_data || !acpuclk_data->get_rate)
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return 0;
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return acpuclk_data->get_rate(cpu);
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}
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int acpuclk_set_rate(int cpu, unsigned long rate, enum setrate_reason reason)
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{
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if (!acpuclk_data || !acpuclk_data->set_rate)
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return 0;
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return acpuclk_data->set_rate(cpu, rate, reason);
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}
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uint32_t acpuclk_get_switch_time(void)
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{
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if (!acpuclk_data)
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return 0;
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return acpuclk_data->switch_time_us;
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}
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unsigned long acpuclk_power_collapse(void)
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{
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unsigned long rate = acpuclk_get_rate(smp_processor_id());
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acpuclk_set_rate(smp_processor_id(), acpuclk_data->power_collapse_khz,
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SETRATE_PC);
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return rate;
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}
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unsigned long acpuclk_wait_for_irq(void)
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{
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unsigned long rate = acpuclk_get_rate(smp_processor_id());
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acpuclk_set_rate(smp_processor_id(), acpuclk_data->wait_for_irq_khz,
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SETRATE_SWFI);
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return rate;
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}
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void acpuclk_register(struct acpuclk_data *data)
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{
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acpuclk_data = data;
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}
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