diff options
author | Michael Hennerich <michael.hennerich@analog.com> | 2008-04-24 16:52:11 -0400 |
---|---|---|
committer | Bryan Wu <cooloney@kernel.org> | 2008-04-24 16:52:11 -0400 |
commit | fe44193c55e26b9b835722b5ee2519972f59c540 (patch) | |
tree | 43c2c45bd8b94b51f02192261a3d67aec6e516c5 /arch/blackfin/mach-bf537 | |
parent | 8e39df215c4b1d3e6f9e62f92d35ab1aa11104eb (diff) |
[Blackfin] arch: Functional power management support: Remove broken cpu frequency scaling drivers
Signed-off-by: Michael Hennerich <michael.hennerich@analog.com>
Signed-off-by: Bryan Wu <cooloney@kernel.org>
Diffstat (limited to 'arch/blackfin/mach-bf537')
-rw-r--r-- | arch/blackfin/mach-bf537/Makefile | 2 | ||||
-rw-r--r-- | arch/blackfin/mach-bf537/cpu.c | 159 |
2 files changed, 0 insertions, 161 deletions
diff --git a/arch/blackfin/mach-bf537/Makefile b/arch/blackfin/mach-bf537/Makefile index 7e7c9c8ac5b2..68e5478e95a9 100644 --- a/arch/blackfin/mach-bf537/Makefile +++ b/arch/blackfin/mach-bf537/Makefile | |||
@@ -5,5 +5,3 @@ | |||
5 | extra-y := head.o | 5 | extra-y := head.o |
6 | 6 | ||
7 | obj-y := ints-priority.o dma.o | 7 | obj-y := ints-priority.o dma.o |
8 | |||
9 | obj-$(CONFIG_CPU_FREQ) += cpu.o | ||
diff --git a/arch/blackfin/mach-bf537/cpu.c b/arch/blackfin/mach-bf537/cpu.c deleted file mode 100644 index 0442c4c7f723..000000000000 --- a/arch/blackfin/mach-bf537/cpu.c +++ /dev/null | |||
@@ -1,159 +0,0 @@ | |||
1 | /* | ||
2 | * File: arch/blackfin/mach-bf537/cpu.c | ||
3 | * Based on: | ||
4 | * Author: michael.kang@analog.com | ||
5 | * | ||
6 | * Created: | ||
7 | * Description: clock scaling for the bf537 | ||
8 | * | ||
9 | * Modified: | ||
10 | * Copyright 2004-2006 Analog Devices Inc. | ||
11 | * | ||
12 | * Bugs: Enter bugs at http://blackfin.uclinux.org/ | ||
13 | * | ||
14 | * This program is free software; you can redistribute it and/or modify | ||
15 | * it under the terms of the GNU General Public License as published by | ||
16 | * the Free Software Foundation; either version 2 of the License, or | ||
17 | * (at your option) any later version. | ||
18 | * | ||
19 | * This program is distributed in the hope that it will be useful, | ||
20 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | ||
21 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | ||
22 | * GNU General Public License for more details. | ||
23 | * | ||
24 | * You should have received a copy of the GNU General Public License | ||
25 | * along with this program; if not, see the file COPYING, or write | ||
26 | * to the Free Software Foundation, Inc., | ||
27 | * 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA | ||
28 | */ | ||
29 | |||
30 | #include <linux/kernel.h> | ||
31 | #include <linux/types.h> | ||
32 | #include <linux/init.h> | ||
33 | #include <linux/cpufreq.h> | ||
34 | #include <asm/dpmc.h> | ||
35 | #include <linux/fs.h> | ||
36 | #include <asm/bfin-global.h> | ||
37 | |||
38 | /* CONFIG_CLKIN_HZ=11059200 */ | ||
39 | #define VCO5 (CONFIG_CLKIN_HZ*45) /*497664000 */ | ||
40 | #define VCO4 (CONFIG_CLKIN_HZ*36) /*398131200 */ | ||
41 | #define VCO3 (CONFIG_CLKIN_HZ*27) /*298598400 */ | ||
42 | #define VCO2 (CONFIG_CLKIN_HZ*18) /*199065600 */ | ||
43 | #define VCO1 (CONFIG_CLKIN_HZ*9) /*99532800 */ | ||
44 | #define VCO(x) VCO##x | ||
45 | |||
46 | #define MFREQ(x) {VCO(x),VCO(x)/4},{VCO(x),VCO(x)/2},{VCO(x),VCO(x)} | ||
47 | /* frequency */ | ||
48 | static struct cpufreq_frequency_table bf537_freq_table[] = { | ||
49 | MFREQ(1), | ||
50 | MFREQ(3), | ||
51 | {VCO4, VCO4 / 2}, {VCO4, VCO4}, | ||
52 | MFREQ(5), | ||
53 | {0, CPUFREQ_TABLE_END}, | ||
54 | }; | ||
55 | |||
56 | /* | ||
57 | * dpmc_fops->ioctl() | ||
58 | * static int dpmc_ioctl(struct inode *inode, struct file *file, unsigned int cmd, unsigned long arg) | ||
59 | */ | ||
60 | static int bf537_getfreq(unsigned int cpu) | ||
61 | { | ||
62 | unsigned long cclk_mhz; | ||
63 | |||
64 | /* The driver only support single cpu */ | ||
65 | if (cpu == 0) | ||
66 | dpmc_fops.ioctl(NULL, NULL, IOCTL_GET_CORECLOCK, &cclk_mhz); | ||
67 | else | ||
68 | cclk_mhz = -1; | ||
69 | |||
70 | return cclk_mhz; | ||
71 | } | ||
72 | |||
73 | static int bf537_target(struct cpufreq_policy *policy, | ||
74 | unsigned int target_freq, unsigned int relation) | ||
75 | { | ||
76 | unsigned long cclk_mhz; | ||
77 | unsigned long vco_mhz; | ||
78 | unsigned long flags; | ||
79 | unsigned int index; | ||
80 | struct cpufreq_freqs freqs; | ||
81 | |||
82 | if (cpufreq_frequency_table_target(policy, bf537_freq_table, target_freq, relation, &index)) | ||
83 | return -EINVAL; | ||
84 | |||
85 | cclk_mhz = bf537_freq_table[index].frequency; | ||
86 | vco_mhz = bf537_freq_table[index].index; | ||
87 | |||
88 | dpmc_fops.ioctl(NULL, NULL, IOCTL_CHANGE_FREQUENCY, &vco_mhz); | ||
89 | freqs.old = bf537_getfreq(0); | ||
90 | freqs.new = cclk_mhz; | ||
91 | freqs.cpu = 0; | ||
92 | |||
93 | pr_debug("cclk begin change to cclk %d,vco=%d,index=%d,target=%d,oldfreq=%d\n", | ||
94 | cclk_mhz, vco_mhz, index, target_freq, freqs.old); | ||
95 | |||
96 | cpufreq_notify_transition(&freqs, CPUFREQ_PRECHANGE); | ||
97 | local_irq_save(flags); | ||
98 | dpmc_fops.ioctl(NULL, NULL, IOCTL_SET_CCLK, &cclk_mhz); | ||
99 | local_irq_restore(flags); | ||
100 | cpufreq_notify_transition(&freqs, CPUFREQ_POSTCHANGE); | ||
101 | |||
102 | vco_mhz = get_vco(); | ||
103 | cclk_mhz = get_cclk(); | ||
104 | return 0; | ||
105 | } | ||
106 | |||
107 | /* make sure that only the "userspace" governor is run -- anything else wouldn't make sense on | ||
108 | * this platform, anyway. | ||
109 | */ | ||
110 | static int bf537_verify_speed(struct cpufreq_policy *policy) | ||
111 | { | ||
112 | return cpufreq_frequency_table_verify(policy, &bf537_freq_table); | ||
113 | } | ||
114 | |||
115 | static int __init __bf537_cpu_init(struct cpufreq_policy *policy) | ||
116 | { | ||
117 | if (policy->cpu != 0) | ||
118 | return -EINVAL; | ||
119 | |||
120 | policy->governor = CPUFREQ_DEFAULT_GOVERNOR; | ||
121 | |||
122 | policy->cpuinfo.transition_latency = CPUFREQ_ETERNAL; | ||
123 | /*Now ,only support one cpu */ | ||
124 | policy->cur = bf537_getfreq(0); | ||
125 | cpufreq_frequency_table_get_attr(bf537_freq_table, policy->cpu); | ||
126 | return cpufreq_frequency_table_cpuinfo(policy, bf537_freq_table); | ||
127 | } | ||
128 | |||
129 | static struct freq_attr *bf537_freq_attr[] = { | ||
130 | &cpufreq_freq_attr_scaling_available_freqs, | ||
131 | NULL, | ||
132 | }; | ||
133 | |||
134 | static struct cpufreq_driver bf537_driver = { | ||
135 | .verify = bf537_verify_speed, | ||
136 | .target = bf537_target, | ||
137 | .get = bf537_getfreq, | ||
138 | .init = __bf537_cpu_init, | ||
139 | .name = "bf537", | ||
140 | .owner = THIS_MODULE, | ||
141 | .attr = bf537_freq_attr, | ||
142 | }; | ||
143 | |||
144 | static int __init bf537_cpu_init(void) | ||
145 | { | ||
146 | return cpufreq_register_driver(&bf537_driver); | ||
147 | } | ||
148 | |||
149 | static void __exit bf537_cpu_exit(void) | ||
150 | { | ||
151 | cpufreq_unregister_driver(&bf537_driver); | ||
152 | } | ||
153 | |||
154 | MODULE_AUTHOR("Mickael Kang"); | ||
155 | MODULE_DESCRIPTION("cpufreq driver for BF537 CPU"); | ||
156 | MODULE_LICENSE("GPL"); | ||
157 | |||
158 | module_init(bf537_cpu_init); | ||
159 | module_exit(bf537_cpu_exit); | ||