diff options
author | Rafael J. Wysocki <rafael.j.wysocki@intel.com> | 2013-04-27 20:10:46 -0400 |
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committer | Rafael J. Wysocki <rafael.j.wysocki@intel.com> | 2013-04-27 20:10:46 -0400 |
commit | 885f925eef411f549f17bc64dd054a3269cf66cd (patch) | |
tree | 6bac783d573a51e497ad28c19b5a71defac85f39 /arch/mips/kernel | |
parent | e4f5a3adc454745fea35f1c312e14cbeba6e0ea4 (diff) | |
parent | 45c009a9a447655aecbdb06c86126f05d0272171 (diff) |
Merge branch 'pm-cpufreq'
* pm-cpufreq: (57 commits)
cpufreq: MAINTAINERS: Add co-maintainer
cpufreq: pxa2xx: initialize variables
ARM: S5pv210: compiling issue, ARM_S5PV210_CPUFREQ needs CONFIG_CPU_FREQ_TABLE=y
cpufreq: cpu0: Put cpu parent node after using it
cpufreq: ARM big LITTLE: Adapt to latest cpufreq updates
cpufreq: ARM big LITTLE: put DT nodes after using them
cpufreq: Don't call __cpufreq_governor() for drivers without target()
cpufreq: exynos5440: Protect OPP search calls with RCU lock
cpufreq: dbx500: Round to closest available freq
cpufreq: Call __cpufreq_governor() with correct policy->cpus mask
cpufreq / intel_pstate: Optimize intel_pstate_set_policy
cpufreq: OMAP: instantiate omap-cpufreq as a platform_driver
arm: exynos: Enable OPP library support for exynos5440
cpufreq: exynos: Remove error return even if no soc is found
cpufreq: exynos: Add cpufreq driver for exynos5440
cpufreq: AMD "frequency sensitivity feedback" powersave bias for ondemand governor
cpufreq: ondemand: allow custom powersave_bias_target handler to be registered
cpufreq: convert cpufreq_driver to using RCU
cpufreq: powerpc/platforms/cell: move cpufreq driver to drivers/cpufreq
cpufreq: sparc: move cpufreq driver to drivers/cpufreq
...
Conflicts:
MAINTAINERS (with commit a8e39c3 from pm-cpuidle)
drivers/cpufreq/cpufreq_governor.h (with commit beb0ff3)
Diffstat (limited to 'arch/mips/kernel')
-rw-r--r-- | arch/mips/kernel/Makefile | 2 | ||||
-rw-r--r-- | arch/mips/kernel/cpufreq/Kconfig | 41 | ||||
-rw-r--r-- | arch/mips/kernel/cpufreq/Makefile | 5 | ||||
-rw-r--r-- | arch/mips/kernel/cpufreq/loongson2_cpufreq.c | 255 |
4 files changed, 0 insertions, 303 deletions
diff --git a/arch/mips/kernel/Makefile b/arch/mips/kernel/Makefile index de75fb50562b..520a908d45d6 100644 --- a/arch/mips/kernel/Makefile +++ b/arch/mips/kernel/Makefile | |||
@@ -92,8 +92,6 @@ CFLAGS_cpu-bugs64.o = $(shell if $(CC) $(KBUILD_CFLAGS) -Wa,-mdaddi -c -o /dev/n | |||
92 | 92 | ||
93 | obj-$(CONFIG_HAVE_STD_PC_SERIAL_PORT) += 8250-platform.o | 93 | obj-$(CONFIG_HAVE_STD_PC_SERIAL_PORT) += 8250-platform.o |
94 | 94 | ||
95 | obj-$(CONFIG_MIPS_CPUFREQ) += cpufreq/ | ||
96 | |||
97 | obj-$(CONFIG_PERF_EVENTS) += perf_event.o | 95 | obj-$(CONFIG_PERF_EVENTS) += perf_event.o |
98 | obj-$(CONFIG_HW_PERF_EVENTS) += perf_event_mipsxx.o | 96 | obj-$(CONFIG_HW_PERF_EVENTS) += perf_event_mipsxx.o |
99 | 97 | ||
diff --git a/arch/mips/kernel/cpufreq/Kconfig b/arch/mips/kernel/cpufreq/Kconfig deleted file mode 100644 index 58c601eee6fd..000000000000 --- a/arch/mips/kernel/cpufreq/Kconfig +++ /dev/null | |||
@@ -1,41 +0,0 @@ | |||
1 | # | ||
2 | # CPU Frequency scaling | ||
3 | # | ||
4 | |||
5 | config MIPS_EXTERNAL_TIMER | ||
6 | bool | ||
7 | |||
8 | config MIPS_CPUFREQ | ||
9 | bool | ||
10 | default y | ||
11 | depends on CPU_SUPPORTS_CPUFREQ && MIPS_EXTERNAL_TIMER | ||
12 | |||
13 | if MIPS_CPUFREQ | ||
14 | |||
15 | menu "CPU Frequency scaling" | ||
16 | |||
17 | source "drivers/cpufreq/Kconfig" | ||
18 | |||
19 | if CPU_FREQ | ||
20 | |||
21 | comment "CPUFreq processor drivers" | ||
22 | |||
23 | config LOONGSON2_CPUFREQ | ||
24 | tristate "Loongson2 CPUFreq Driver" | ||
25 | select CPU_FREQ_TABLE | ||
26 | depends on MIPS_CPUFREQ | ||
27 | help | ||
28 | This option adds a CPUFreq driver for loongson processors which | ||
29 | support software configurable cpu frequency. | ||
30 | |||
31 | Loongson2F and it's successors support this feature. | ||
32 | |||
33 | For details, take a look at <file:Documentation/cpu-freq/>. | ||
34 | |||
35 | If in doubt, say N. | ||
36 | |||
37 | endif # CPU_FREQ | ||
38 | |||
39 | endmenu | ||
40 | |||
41 | endif # MIPS_CPUFREQ | ||
diff --git a/arch/mips/kernel/cpufreq/Makefile b/arch/mips/kernel/cpufreq/Makefile deleted file mode 100644 index 05a5715ee38c..000000000000 --- a/arch/mips/kernel/cpufreq/Makefile +++ /dev/null | |||
@@ -1,5 +0,0 @@ | |||
1 | # | ||
2 | # Makefile for the Linux/MIPS cpufreq. | ||
3 | # | ||
4 | |||
5 | obj-$(CONFIG_LOONGSON2_CPUFREQ) += loongson2_cpufreq.o | ||
diff --git a/arch/mips/kernel/cpufreq/loongson2_cpufreq.c b/arch/mips/kernel/cpufreq/loongson2_cpufreq.c deleted file mode 100644 index 3237c5235f9c..000000000000 --- a/arch/mips/kernel/cpufreq/loongson2_cpufreq.c +++ /dev/null | |||
@@ -1,255 +0,0 @@ | |||
1 | /* | ||
2 | * Cpufreq driver for the loongson-2 processors | ||
3 | * | ||
4 | * The 2E revision of loongson processor not support this feature. | ||
5 | * | ||
6 | * Copyright (C) 2006 - 2008 Lemote Inc. & Insititute of Computing Technology | ||
7 | * Author: Yanhua, yanh@lemote.com | ||
8 | * | ||
9 | * This file is subject to the terms and conditions of the GNU General Public | ||
10 | * License. See the file "COPYING" in the main directory of this archive | ||
11 | * for more details. | ||
12 | */ | ||
13 | #include <linux/cpufreq.h> | ||
14 | #include <linux/module.h> | ||
15 | #include <linux/err.h> | ||
16 | #include <linux/sched.h> /* set_cpus_allowed() */ | ||
17 | #include <linux/delay.h> | ||
18 | #include <linux/platform_device.h> | ||
19 | |||
20 | #include <asm/clock.h> | ||
21 | |||
22 | #include <asm/mach-loongson/loongson.h> | ||
23 | |||
24 | static uint nowait; | ||
25 | |||
26 | static struct clk *cpuclk; | ||
27 | |||
28 | static void (*saved_cpu_wait) (void); | ||
29 | |||
30 | static int loongson2_cpu_freq_notifier(struct notifier_block *nb, | ||
31 | unsigned long val, void *data); | ||
32 | |||
33 | static struct notifier_block loongson2_cpufreq_notifier_block = { | ||
34 | .notifier_call = loongson2_cpu_freq_notifier | ||
35 | }; | ||
36 | |||
37 | static int loongson2_cpu_freq_notifier(struct notifier_block *nb, | ||
38 | unsigned long val, void *data) | ||
39 | { | ||
40 | if (val == CPUFREQ_POSTCHANGE) | ||
41 | current_cpu_data.udelay_val = loops_per_jiffy; | ||
42 | |||
43 | return 0; | ||
44 | } | ||
45 | |||
46 | static unsigned int loongson2_cpufreq_get(unsigned int cpu) | ||
47 | { | ||
48 | return clk_get_rate(cpuclk); | ||
49 | } | ||
50 | |||
51 | /* | ||
52 | * Here we notify other drivers of the proposed change and the final change. | ||
53 | */ | ||
54 | static int loongson2_cpufreq_target(struct cpufreq_policy *policy, | ||
55 | unsigned int target_freq, | ||
56 | unsigned int relation) | ||
57 | { | ||
58 | unsigned int cpu = policy->cpu; | ||
59 | unsigned int newstate = 0; | ||
60 | cpumask_t cpus_allowed; | ||
61 | struct cpufreq_freqs freqs; | ||
62 | unsigned int freq; | ||
63 | |||
64 | if (!cpu_online(cpu)) | ||
65 | return -ENODEV; | ||
66 | |||
67 | cpus_allowed = current->cpus_allowed; | ||
68 | set_cpus_allowed_ptr(current, cpumask_of(cpu)); | ||
69 | |||
70 | if (cpufreq_frequency_table_target | ||
71 | (policy, &loongson2_clockmod_table[0], target_freq, relation, | ||
72 | &newstate)) | ||
73 | return -EINVAL; | ||
74 | |||
75 | freq = | ||
76 | ((cpu_clock_freq / 1000) * | ||
77 | loongson2_clockmod_table[newstate].index) / 8; | ||
78 | if (freq < policy->min || freq > policy->max) | ||
79 | return -EINVAL; | ||
80 | |||
81 | pr_debug("cpufreq: requested frequency %u Hz\n", target_freq * 1000); | ||
82 | |||
83 | freqs.cpu = cpu; | ||
84 | freqs.old = loongson2_cpufreq_get(cpu); | ||
85 | freqs.new = freq; | ||
86 | freqs.flags = 0; | ||
87 | |||
88 | if (freqs.new == freqs.old) | ||
89 | return 0; | ||
90 | |||
91 | /* notifiers */ | ||
92 | cpufreq_notify_transition(&freqs, CPUFREQ_PRECHANGE); | ||
93 | |||
94 | set_cpus_allowed_ptr(current, &cpus_allowed); | ||
95 | |||
96 | /* setting the cpu frequency */ | ||
97 | clk_set_rate(cpuclk, freq); | ||
98 | |||
99 | /* notifiers */ | ||
100 | cpufreq_notify_transition(&freqs, CPUFREQ_POSTCHANGE); | ||
101 | |||
102 | pr_debug("cpufreq: set frequency %u kHz\n", freq); | ||
103 | |||
104 | return 0; | ||
105 | } | ||
106 | |||
107 | static int loongson2_cpufreq_cpu_init(struct cpufreq_policy *policy) | ||
108 | { | ||
109 | int i; | ||
110 | unsigned long rate; | ||
111 | int ret; | ||
112 | |||
113 | if (!cpu_online(policy->cpu)) | ||
114 | return -ENODEV; | ||
115 | |||
116 | cpuclk = clk_get(NULL, "cpu_clk"); | ||
117 | if (IS_ERR(cpuclk)) { | ||
118 | printk(KERN_ERR "cpufreq: couldn't get CPU clk\n"); | ||
119 | return PTR_ERR(cpuclk); | ||
120 | } | ||
121 | |||
122 | rate = cpu_clock_freq / 1000; | ||
123 | if (!rate) { | ||
124 | clk_put(cpuclk); | ||
125 | return -EINVAL; | ||
126 | } | ||
127 | ret = clk_set_rate(cpuclk, rate); | ||
128 | if (ret) { | ||
129 | clk_put(cpuclk); | ||
130 | return ret; | ||
131 | } | ||
132 | |||
133 | /* clock table init */ | ||
134 | for (i = 2; | ||
135 | (loongson2_clockmod_table[i].frequency != CPUFREQ_TABLE_END); | ||
136 | i++) | ||
137 | loongson2_clockmod_table[i].frequency = (rate * i) / 8; | ||
138 | |||
139 | policy->cur = loongson2_cpufreq_get(policy->cpu); | ||
140 | |||
141 | cpufreq_frequency_table_get_attr(&loongson2_clockmod_table[0], | ||
142 | policy->cpu); | ||
143 | |||
144 | return cpufreq_frequency_table_cpuinfo(policy, | ||
145 | &loongson2_clockmod_table[0]); | ||
146 | } | ||
147 | |||
148 | static int loongson2_cpufreq_verify(struct cpufreq_policy *policy) | ||
149 | { | ||
150 | return cpufreq_frequency_table_verify(policy, | ||
151 | &loongson2_clockmod_table[0]); | ||
152 | } | ||
153 | |||
154 | static int loongson2_cpufreq_exit(struct cpufreq_policy *policy) | ||
155 | { | ||
156 | clk_put(cpuclk); | ||
157 | return 0; | ||
158 | } | ||
159 | |||
160 | static struct freq_attr *loongson2_table_attr[] = { | ||
161 | &cpufreq_freq_attr_scaling_available_freqs, | ||
162 | NULL, | ||
163 | }; | ||
164 | |||
165 | static struct cpufreq_driver loongson2_cpufreq_driver = { | ||
166 | .owner = THIS_MODULE, | ||
167 | .name = "loongson2", | ||
168 | .init = loongson2_cpufreq_cpu_init, | ||
169 | .verify = loongson2_cpufreq_verify, | ||
170 | .target = loongson2_cpufreq_target, | ||
171 | .get = loongson2_cpufreq_get, | ||
172 | .exit = loongson2_cpufreq_exit, | ||
173 | .attr = loongson2_table_attr, | ||
174 | }; | ||
175 | |||
176 | static struct platform_device_id platform_device_ids[] = { | ||
177 | { | ||
178 | .name = "loongson2_cpufreq", | ||
179 | }, | ||
180 | {} | ||
181 | }; | ||
182 | |||
183 | MODULE_DEVICE_TABLE(platform, platform_device_ids); | ||
184 | |||
185 | static struct platform_driver platform_driver = { | ||
186 | .driver = { | ||
187 | .name = "loongson2_cpufreq", | ||
188 | .owner = THIS_MODULE, | ||
189 | }, | ||
190 | .id_table = platform_device_ids, | ||
191 | }; | ||
192 | |||
193 | /* | ||
194 | * This is the simple version of Loongson-2 wait, Maybe we need do this in | ||
195 | * interrupt disabled context. | ||
196 | */ | ||
197 | |||
198 | static DEFINE_SPINLOCK(loongson2_wait_lock); | ||
199 | |||
200 | static void loongson2_cpu_wait(void) | ||
201 | { | ||
202 | unsigned long flags; | ||
203 | u32 cpu_freq; | ||
204 | |||
205 | spin_lock_irqsave(&loongson2_wait_lock, flags); | ||
206 | cpu_freq = LOONGSON_CHIPCFG0; | ||
207 | LOONGSON_CHIPCFG0 &= ~0x7; /* Put CPU into wait mode */ | ||
208 | LOONGSON_CHIPCFG0 = cpu_freq; /* Restore CPU state */ | ||
209 | spin_unlock_irqrestore(&loongson2_wait_lock, flags); | ||
210 | } | ||
211 | |||
212 | static int __init cpufreq_init(void) | ||
213 | { | ||
214 | int ret; | ||
215 | |||
216 | /* Register platform stuff */ | ||
217 | ret = platform_driver_register(&platform_driver); | ||
218 | if (ret) | ||
219 | return ret; | ||
220 | |||
221 | pr_info("cpufreq: Loongson-2F CPU frequency driver.\n"); | ||
222 | |||
223 | cpufreq_register_notifier(&loongson2_cpufreq_notifier_block, | ||
224 | CPUFREQ_TRANSITION_NOTIFIER); | ||
225 | |||
226 | ret = cpufreq_register_driver(&loongson2_cpufreq_driver); | ||
227 | |||
228 | if (!ret && !nowait) { | ||
229 | saved_cpu_wait = cpu_wait; | ||
230 | cpu_wait = loongson2_cpu_wait; | ||
231 | } | ||
232 | |||
233 | return ret; | ||
234 | } | ||
235 | |||
236 | static void __exit cpufreq_exit(void) | ||
237 | { | ||
238 | if (!nowait && saved_cpu_wait) | ||
239 | cpu_wait = saved_cpu_wait; | ||
240 | cpufreq_unregister_driver(&loongson2_cpufreq_driver); | ||
241 | cpufreq_unregister_notifier(&loongson2_cpufreq_notifier_block, | ||
242 | CPUFREQ_TRANSITION_NOTIFIER); | ||
243 | |||
244 | platform_driver_unregister(&platform_driver); | ||
245 | } | ||
246 | |||
247 | module_init(cpufreq_init); | ||
248 | module_exit(cpufreq_exit); | ||
249 | |||
250 | module_param(nowait, uint, 0644); | ||
251 | MODULE_PARM_DESC(nowait, "Disable Loongson-2F specific wait"); | ||
252 | |||
253 | MODULE_AUTHOR("Yanhua <yanh@lemote.com>"); | ||
254 | MODULE_DESCRIPTION("cpufreq driver for Loongson2F"); | ||
255 | MODULE_LICENSE("GPL"); | ||