| /* Copyright (c) 2011-2013, The Linux Foundation. All rights reserved. |
| * |
| * This program is free software; you can redistribute it and/or modify |
| * it under the terms of the GNU General Public License version 2 and |
| * only version 2 as published by the Free Software Foundation. |
| * |
| * This program is distributed in the hope that it will be useful, |
| * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| * GNU General Public License for more details. |
| */ |
| |
| #include <linux/cpu.h> |
| #include <linux/smp.h> |
| #include "acpuclock.h" |
| #include <trace/events/power.h> |
| |
| static struct acpuclk_data *acpuclk_data; |
| |
| unsigned long acpuclk_get_rate(int cpu) |
| { |
| if (!acpuclk_data || !acpuclk_data->get_rate) |
| return 0; |
| |
| return acpuclk_data->get_rate(cpu); |
| } |
| |
| int acpuclk_set_rate(int cpu, unsigned long rate, enum setrate_reason reason) |
| { |
| int ret; |
| |
| if (!acpuclk_data || !acpuclk_data->set_rate) |
| return 0; |
| |
| trace_cpu_frequency_switch_start(acpuclk_get_rate(cpu), rate, cpu); |
| ret = acpuclk_data->set_rate(cpu, rate, reason); |
| if (!ret) { |
| trace_cpu_frequency_switch_end(cpu); |
| trace_cpu_frequency(rate, cpu); |
| } |
| |
| return ret; |
| } |
| |
| uint32_t acpuclk_get_switch_time(void) |
| { |
| if (!acpuclk_data) |
| return 0; |
| return acpuclk_data->switch_time_us; |
| } |
| |
| unsigned long acpuclk_power_collapse(void) |
| { |
| unsigned long rate = acpuclk_get_rate(smp_processor_id()); |
| acpuclk_set_rate(smp_processor_id(), acpuclk_data->power_collapse_khz, |
| SETRATE_PC); |
| return rate; |
| } |
| |
| unsigned long acpuclk_wait_for_irq(void) |
| { |
| unsigned long rate = acpuclk_get_rate(smp_processor_id()); |
| acpuclk_set_rate(smp_processor_id(), acpuclk_data->wait_for_irq_khz, |
| SETRATE_SWFI); |
| return rate; |
| } |
| |
| void __devinit acpuclk_register(struct acpuclk_data *data) |
| { |
| acpuclk_data = data; |
| } |