Staging
v0.8.1
v0.8.1
swh:1:snp:a902887e4be9191b7c6c4406aa06b31c1ce2c7cc
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- v3.9-rc8
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- v3.19-rc1
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- v3.18-rc7
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- v3.16-rc1
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- v3.14-rc8
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- v3.10
- v3.1-rc9
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- v3.0-rc1
- v3.0
- v2.6.39-rc7
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- v2.6.38-rc1
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- v2.6.32
- v2.6.31-rc9
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- v2.6.31-rc1
- v2.6.31
- v2.6.30-rc8
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- v2.6.30-rc1
- v2.6.30
- v2.6.29-rc8
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- v2.6.29-rc1
- v2.6.29
- v2.6.28-rc9
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- v2.6.28-rc1
- v2.6.28
- v2.6.27-rc9
- v2.6.27-rc8
- v2.6.27-rc7
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- v2.6.27-rc1
- v2.6.27
- v2.6.26-rc9
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- v2.6.26-rc1
- v2.6.26
- v2.6.25-rc9
- v2.6.25-rc8
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- v2.6.25-rc1
- v2.6.25
- v2.6.24-rc8
- v2.6.24-rc7
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- v2.6.24-rc3
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- v2.6.24-rc1
- v2.6.24
- v2.6.23-rc9
- v2.6.23-rc8
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- v2.6.23-rc1
- v2.6.23
- v2.6.22-rc7
- v2.6.22-rc6
- v2.6.22-rc5
- v2.6.22-rc4
- v2.6.22-rc3
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- v2.6.22-rc1
- v2.6.22
- v2.6.21-rc7
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- v2.6.21-rc1
- v2.6.21
- v2.6.20-rc7
- v2.6.20-rc6
- v2.6.20-rc5
- v2.6.20-rc4
- v2.6.20-rc3
- v2.6.20-rc2
- v2.6.20-rc1
- v2.6.20
- v2.6.19-rc6
- v2.6.19-rc5
- v2.6.19-rc4
- v2.6.19-rc3
- v2.6.19-rc2
- v2.6.19-rc1
- v2.6.19
- v2.6.18-rc7
- v2.6.18-rc6
- v2.6.18-rc5
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- v2.6.18-rc1
- v2.6.18
- v2.6.17-rc6
- v2.6.17-rc5
- v2.6.17-rc4
- v2.6.17-rc3
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- v2.6.17-rc1
- v2.6.17
- v2.6.16-rc6
- v2.6.16-rc5
- v2.6.16-rc4
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- v2.6.16-rc1
- v2.6.16
- v2.6.15-rc7
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- v2.6.15-rc1
- v2.6.15
- v2.6.14-rc5
- v2.6.14-rc4
- v2.6.14-rc3
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Tip revision: 5edb56491d4812c42175980759da53388e5d86f5 authored by Linus Torvalds on 12 June 2016, 14:20:35 UTC
Linux 4.7-rc3
Linux 4.7-rc3
Tip revision: 5edb564
unicore2-cpufreq.c
/*
* clock scaling for the UniCore-II
*
* Code specific to PKUnity SoC and UniCore ISA
*
* Maintained by GUAN Xue-tao <gxt@mprc.pku.edu.cn>
* Copyright (C) 2001-2010 Guan Xuetao
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 as
* published by the Free Software Foundation.
*/
#include <linux/err.h>
#include <linux/kernel.h>
#include <linux/types.h>
#include <linux/init.h>
#include <linux/clk.h>
#include <linux/cpufreq.h>
#include <mach/hardware.h>
static struct cpufreq_driver ucv2_driver;
/* make sure that only the "userspace" governor is run
* -- anything else wouldn't make sense on this platform, anyway.
*/
static int ucv2_verify_speed(struct cpufreq_policy *policy)
{
if (policy->cpu)
return -EINVAL;
cpufreq_verify_within_cpu_limits(policy);
return 0;
}
static int ucv2_target(struct cpufreq_policy *policy,
unsigned int target_freq,
unsigned int relation)
{
struct cpufreq_freqs freqs;
int ret;
freqs.old = policy->cur;
freqs.new = target_freq;
cpufreq_freq_transition_begin(policy, &freqs);
ret = clk_set_rate(policy->clk, target_freq * 1000);
cpufreq_freq_transition_end(policy, &freqs, ret);
return ret;
}
static int __init ucv2_cpu_init(struct cpufreq_policy *policy)
{
if (policy->cpu != 0)
return -EINVAL;
policy->min = policy->cpuinfo.min_freq = 250000;
policy->max = policy->cpuinfo.max_freq = 1000000;
policy->cpuinfo.transition_latency = CPUFREQ_ETERNAL;
policy->clk = clk_get(NULL, "MAIN_CLK");
return PTR_ERR_OR_ZERO(policy->clk);
}
static struct cpufreq_driver ucv2_driver = {
.flags = CPUFREQ_STICKY,
.verify = ucv2_verify_speed,
.target = ucv2_target,
.get = cpufreq_generic_get,
.init = ucv2_cpu_init,
.name = "UniCore-II",
};
static int __init ucv2_cpufreq_init(void)
{
return cpufreq_register_driver(&ucv2_driver);
}
arch_initcall(ucv2_cpufreq_init);