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-rw-r--r--arch/blackfin/mach-bf533/cpu.c158
1 files changed, 0 insertions, 158 deletions
diff --git a/arch/blackfin/mach-bf533/cpu.c b/arch/blackfin/mach-bf533/cpu.c
deleted file mode 100644
index b7a0e0fbd9af..000000000000
--- a/arch/blackfin/mach-bf533/cpu.c
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1/*
2 * File: arch/blackfin/mach-bf533/cpu.c
3 * Based on:
4 * Author: michael.kang@analog.com
5 *
6 * Created:
7 * Description: clock scaling for the bf533
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 FREQ(x) {VCO(x),VCO(x)/4},{VCO(x),VCO(x)/2},{VCO(x),VCO(x)}
47/* frequency */
48static struct cpufreq_frequency_table bf533_freq_table[] = {
49 FREQ(1),
50 FREQ(3),
51 {VCO4, VCO4 / 2}, {VCO4, VCO4},
52 FREQ(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 */
60static int bf533_getfreq(unsigned int cpu)
61{
62 unsigned long cclk_mhz, vco_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 return cclk_mhz;
70}
71
72static int bf533_target(struct cpufreq_policy *policy,
73 unsigned int target_freq, unsigned int relation)
74{
75 unsigned long cclk_mhz;
76 unsigned long vco_mhz;
77 unsigned long flags;
78 unsigned int index, vco_index;
79 int i;
80
81 struct cpufreq_freqs freqs;
82 if (cpufreq_frequency_table_target(policy, bf533_freq_table, target_freq, relation, &index))
83 return -EINVAL;
84 cclk_mhz = bf533_freq_table[index].frequency;
85 vco_mhz = bf533_freq_table[index].index;
86
87 dpmc_fops.ioctl(NULL, NULL, IOCTL_CHANGE_FREQUENCY, &vco_mhz);
88 freqs.old = bf533_getfreq(0);
89 freqs.new = cclk_mhz;
90 freqs.cpu = 0;
91
92 pr_debug("cclk begin change to cclk %d,vco=%d,index=%d,target=%d,oldfreq=%d\n",
93 cclk_mhz, vco_mhz, index, target_freq, freqs.old);
94
95 cpufreq_notify_transition(&freqs, CPUFREQ_PRECHANGE);
96 local_irq_save(flags);
97 dpmc_fops.ioctl(NULL, NULL, IOCTL_SET_CCLK, &cclk_mhz);
98 local_irq_restore(flags);
99 cpufreq_notify_transition(&freqs, CPUFREQ_POSTCHANGE);
100
101 vco_mhz = get_vco();
102 cclk_mhz = get_cclk();
103 return 0;
104}
105
106/* make sure that only the "userspace" governor is run -- anything else wouldn't make sense on
107 * this platform, anyway.
108 */
109static int bf533_verify_speed(struct cpufreq_policy *policy)
110{
111 return cpufreq_frequency_table_verify(policy, &bf533_freq_table);
112}
113
114static int __init __bf533_cpu_init(struct cpufreq_policy *policy)
115{
116 int result;
117
118 if (policy->cpu != 0)
119 return -EINVAL;
120
121 policy->cpuinfo.transition_latency = CPUFREQ_ETERNAL;
122 /*Now ,only support one cpu */
123 policy->cur = bf533_getfreq(0);
124 cpufreq_frequency_table_get_attr(bf533_freq_table, policy->cpu);
125 return cpufreq_frequency_table_cpuinfo(policy, bf533_freq_table);
126}
127
128static struct freq_attr *bf533_freq_attr[] = {
129 &cpufreq_freq_attr_scaling_available_freqs,
130 NULL,
131};
132
133static struct cpufreq_driver bf533_driver = {
134 .verify = bf533_verify_speed,
135 .target = bf533_target,
136 .get = bf533_getfreq,
137 .init = __bf533_cpu_init,
138 .name = "bf533",
139 .owner = THIS_MODULE,
140 .attr = bf533_freq_attr,
141};
142
143static int __init bf533_cpu_init(void)
144{
145 return cpufreq_register_driver(&bf533_driver);
146}
147
148static void __exit bf533_cpu_exit(void)
149{
150 cpufreq_unregister_driver(&bf533_driver);
151}
152
153MODULE_AUTHOR("Mickael Kang");
154MODULE_DESCRIPTION("cpufreq driver for BF533 CPU");
155MODULE_LICENSE("GPL");
156
157module_init(bf533_cpu_init);
158module_exit(bf533_cpu_exit);
generated by cgit v1.2.2 (git 2.25.0) at 2025-01-23 01:56:53 -0500