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authorViresh Kumar <viresh.kumar@linaro.org>2013-04-04 08:54:23 -0400
committerRafael J. Wysocki <rafael.j.wysocki@intel.com>2013-04-10 07:19:26 -0400
commit73cc9c8cac3f86ae4efebf001b68dcecc00b0017 (patch)
treeea771271a3307e73094cec11c78549b37d91ac7a /arch/unicore32
parent7258267e56325d41f468eb650b6c23f697201645 (diff)
cpufreq: unicore2: move cpufreq driver to drivers/cpufreq
This patch moves cpufreq driver of UNICORE-2 architecture to drivers/cpufreq. Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org> Acked-by: Guan Xuetao <gxt@mprc.pku.edu.cn> Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Diffstat (limited to 'arch/unicore32')
-rw-r--r--arch/unicore32/kernel/Makefile1
-rw-r--r--arch/unicore32/kernel/cpu-ucv2.c92
2 files changed, 0 insertions, 93 deletions
diff --git a/arch/unicore32/kernel/Makefile b/arch/unicore32/kernel/Makefile
index fa497e0efe5a..607a72f2ae35 100644
--- a/arch/unicore32/kernel/Makefile
+++ b/arch/unicore32/kernel/Makefile
@@ -9,7 +9,6 @@ obj-y += setup.o signal.o sys.o stacktrace.o traps.o
9obj-$(CONFIG_MODULES) += ksyms.o module.o 9obj-$(CONFIG_MODULES) += ksyms.o module.o
10obj-$(CONFIG_EARLY_PRINTK) += early_printk.o 10obj-$(CONFIG_EARLY_PRINTK) += early_printk.o
11 11
12obj-$(CONFIG_CPU_FREQ) += cpu-ucv2.o
13obj-$(CONFIG_UNICORE_FPU_F64) += fpu-ucf64.o 12obj-$(CONFIG_UNICORE_FPU_F64) += fpu-ucf64.o
14 13
15# obj-y for architecture PKUnity v3 14# obj-y for architecture PKUnity v3
diff --git a/arch/unicore32/kernel/cpu-ucv2.c b/arch/unicore32/kernel/cpu-ucv2.c
deleted file mode 100644
index ba5a71ce2d71..000000000000
--- a/arch/unicore32/kernel/cpu-ucv2.c
+++ /dev/null
@@ -1,92 +0,0 @@
1/*
2 * linux/arch/unicore32/kernel/cpu-ucv2.c: clock scaling for the UniCore-II
3 *
4 * Code specific to PKUnity SoC and UniCore ISA
5 *
6 * Maintained by GUAN Xue-tao <gxt@mprc.pku.edu.cn>
7 * Copyright (C) 2001-2010 Guan Xuetao
8 *
9 * This program is free software; you can redistribute it and/or modify
10 * it under the terms of the GNU General Public License version 2 as
11 * published by the Free Software Foundation.
12 */
13
14#include <linux/kernel.h>
15#include <linux/types.h>
16#include <linux/init.h>
17#include <linux/clk.h>
18#include <linux/cpufreq.h>
19
20#include <mach/hardware.h>
21
22static struct cpufreq_driver ucv2_driver;
23
24/* make sure that only the "userspace" governor is run
25 * -- anything else wouldn't make sense on this platform, anyway.
26 */
27int ucv2_verify_speed(struct cpufreq_policy *policy)
28{
29 if (policy->cpu)
30 return -EINVAL;
31
32 cpufreq_verify_within_limits(policy,
33 policy->cpuinfo.min_freq, policy->cpuinfo.max_freq);
34
35 return 0;
36}
37
38static unsigned int ucv2_getspeed(unsigned int cpu)
39{
40 struct clk *mclk = clk_get(NULL, "MAIN_CLK");
41
42 if (cpu)
43 return 0;
44 return clk_get_rate(mclk)/1000;
45}
46
47static int ucv2_target(struct cpufreq_policy *policy,
48 unsigned int target_freq,
49 unsigned int relation)
50{
51 unsigned int cur = ucv2_getspeed(0);
52 struct cpufreq_freqs freqs;
53 struct clk *mclk = clk_get(NULL, "MAIN_CLK");
54
55 cpufreq_notify_transition(policy, &freqs, CPUFREQ_PRECHANGE);
56
57 if (!clk_set_rate(mclk, target_freq * 1000)) {
58 freqs.old = cur;
59 freqs.new = target_freq;
60 }
61
62 cpufreq_notify_transition(policy, &freqs, CPUFREQ_POSTCHANGE);
63
64 return 0;
65}
66
67static int __init ucv2_cpu_init(struct cpufreq_policy *policy)
68{
69 if (policy->cpu != 0)
70 return -EINVAL;
71 policy->cur = ucv2_getspeed(0);
72 policy->min = policy->cpuinfo.min_freq = 250000;
73 policy->max = policy->cpuinfo.max_freq = 1000000;
74 policy->cpuinfo.transition_latency = CPUFREQ_ETERNAL;
75 return 0;
76}
77
78static struct cpufreq_driver ucv2_driver = {
79 .flags = CPUFREQ_STICKY,
80 .verify = ucv2_verify_speed,
81 .target = ucv2_target,
82 .get = ucv2_getspeed,
83 .init = ucv2_cpu_init,
84 .name = "UniCore-II",
85};
86
87static int __init ucv2_cpufreq_init(void)
88{
89 return cpufreq_register_driver(&ucv2_driver);
90}
91
92arch_initcall(ucv2_cpufreq_init);