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authorMichael Hennerich <michael.hennerich@analog.com>2008-04-24 16:52:11 -0400
committerBryan Wu <cooloney@kernel.org>2008-04-24 16:52:11 -0400
commitfe44193c55e26b9b835722b5ee2519972f59c540 (patch)
tree43c2c45bd8b94b51f02192261a3d67aec6e516c5 /arch/blackfin
parent8e39df215c4b1d3e6f9e62f92d35ab1aa11104eb (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')
-rw-r--r--arch/blackfin/mach-bf527/Makefile2
-rw-r--r--arch/blackfin/mach-bf527/cpu.c161
-rw-r--r--arch/blackfin/mach-bf533/Makefile2
-rw-r--r--arch/blackfin/mach-bf533/cpu.c158
-rw-r--r--arch/blackfin/mach-bf537/Makefile2
-rw-r--r--arch/blackfin/mach-bf537/cpu.c159
-rw-r--r--arch/blackfin/mach-bf548/Makefile2
-rw-r--r--arch/blackfin/mach-bf548/cpu.c159
8 files changed, 0 insertions, 645 deletions
diff --git a/arch/blackfin/mach-bf527/Makefile b/arch/blackfin/mach-bf527/Makefile
index 9f99f5d0bcd1..4eddb580319c 100644
--- a/arch/blackfin/mach-bf527/Makefile
+++ b/arch/blackfin/mach-bf527/Makefile
@@ -5,5 +5,3 @@
5extra-y := head.o 5extra-y := head.o
6 6
7obj-y := ints-priority.o dma.o 7obj-y := ints-priority.o dma.o
8
9obj-$(CONFIG_CPU_FREQ) += cpu.o
diff --git a/arch/blackfin/mach-bf527/cpu.c b/arch/blackfin/mach-bf527/cpu.c
deleted file mode 100644
index 1975402b1dbc..000000000000
--- a/arch/blackfin/mach-bf527/cpu.c
+++ /dev/null
@@ -1,161 +0,0 @@
1/*
2 * File: arch/blackfin/mach-bf527/cpu.c
3 * Based on: arch/blackfin/mach-bf537/cpu.c
4 * Author: michael.kang@analog.com
5 *
6 * Created:
7 * Description: clock scaling for the bf527
8 *
9 * Modified:
10 * Copyright 2004-2007 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 */
48static struct cpufreq_frequency_table bf527_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 */
60static int bf527_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
73static int bf527_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
83 (policy, bf527_freq_table, target_freq, relation, &index))
84 return -EINVAL;
85
86 cclk_mhz = bf527_freq_table[index].frequency;
87 vco_mhz = bf527_freq_table[index].index;
88
89 dpmc_fops.ioctl(NULL, NULL, IOCTL_CHANGE_FREQUENCY, &vco_mhz);
90 freqs.old = bf527_getfreq(0);
91 freqs.new = cclk_mhz;
92 freqs.cpu = 0;
93
94 pr_debug
95 ("cclk begin change to cclk %d,vco=%d,index=%d,target=%d,oldfreq=%d\n",
96 cclk_mhz, vco_mhz, index, target_freq, freqs.old);
97
98 cpufreq_notify_transition(&freqs, CPUFREQ_PRECHANGE);
99 local_irq_save(flags);
100 dpmc_fops.ioctl(NULL, NULL, IOCTL_SET_CCLK, &cclk_mhz);
101 local_irq_restore(flags);
102 cpufreq_notify_transition(&freqs, CPUFREQ_POSTCHANGE);
103
104 vco_mhz = get_vco();
105 cclk_mhz = get_cclk();
106 return 0;
107}
108
109/* make sure that only the "userspace" governor is run -- anything else wouldn't make sense on
110 * this platform, anyway.
111 */
112static int bf527_verify_speed(struct cpufreq_policy *policy)
113{
114 return cpufreq_frequency_table_verify(policy, &bf527_freq_table);
115}
116
117static int __init __bf527_cpu_init(struct cpufreq_policy *policy)
118{
119 if (policy->cpu != 0)
120 return -EINVAL;
121
122 policy->governor = CPUFREQ_DEFAULT_GOVERNOR;
123
124 policy->cpuinfo.transition_latency = CPUFREQ_ETERNAL;
125 /*Now ,only support one cpu */
126 policy->cur = bf527_getfreq(0);
127 cpufreq_frequency_table_get_attr(bf527_freq_table, policy->cpu);
128 return cpufreq_frequency_table_cpuinfo(policy, bf527_freq_table);
129}
130
131static struct freq_attr *bf527_freq_attr[] = {
132 &cpufreq_freq_attr_scaling_available_freqs,
133 NULL,
134};
135
136static struct cpufreq_driver bf527_driver = {
137 .verify = bf527_verify_speed,
138 .target = bf527_target,
139 .get = bf527_getfreq,
140 .init = __bf527_cpu_init,
141 .name = "bf527",
142 .owner = THIS_MODULE,
143 .attr = bf527_freq_attr,
144};
145
146static int __init bf527_cpu_init(void)
147{
148 return cpufreq_register_driver(&bf527_driver);
149}
150
151static void __exit bf527_cpu_exit(void)
152{
153 cpufreq_unregister_driver(&bf527_driver);
154}
155
156MODULE_AUTHOR("Mickael Kang");
157MODULE_DESCRIPTION("cpufreq driver for bf527 CPU");
158MODULE_LICENSE("GPL");
159
160module_init(bf527_cpu_init);
161module_exit(bf527_cpu_exit);
diff --git a/arch/blackfin/mach-bf533/Makefile b/arch/blackfin/mach-bf533/Makefile
index 8cce1736360d..aa9f2647ee0c 100644
--- a/arch/blackfin/mach-bf533/Makefile
+++ b/arch/blackfin/mach-bf533/Makefile
@@ -5,5 +5,3 @@
5extra-y := head.o 5extra-y := head.o
6 6
7obj-y := ints-priority.o dma.o 7obj-y := ints-priority.o dma.o
8
9obj-$(CONFIG_CPU_FREQ) += cpu.o
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
+++ /dev/null
@@ -1,158 +0,0 @@
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);
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 @@
5extra-y := head.o 5extra-y := head.o
6 6
7obj-y := ints-priority.o dma.o 7obj-y := ints-priority.o dma.o
8
9obj-$(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 */
48static 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 */
60static 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
73static 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 */
110static int bf537_verify_speed(struct cpufreq_policy *policy)
111{
112 return cpufreq_frequency_table_verify(policy, &bf537_freq_table);
113}
114
115static 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
129static struct freq_attr *bf537_freq_attr[] = {
130 &cpufreq_freq_attr_scaling_available_freqs,
131 NULL,
132};
133
134static 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
144static int __init bf537_cpu_init(void)
145{
146 return cpufreq_register_driver(&bf537_driver);
147}
148
149static void __exit bf537_cpu_exit(void)
150{
151 cpufreq_unregister_driver(&bf537_driver);
152}
153
154MODULE_AUTHOR("Mickael Kang");
155MODULE_DESCRIPTION("cpufreq driver for BF537 CPU");
156MODULE_LICENSE("GPL");
157
158module_init(bf537_cpu_init);
159module_exit(bf537_cpu_exit);
diff --git a/arch/blackfin/mach-bf548/Makefile b/arch/blackfin/mach-bf548/Makefile
index 7e7c9c8ac5b2..68e5478e95a9 100644
--- a/arch/blackfin/mach-bf548/Makefile
+++ b/arch/blackfin/mach-bf548/Makefile
@@ -5,5 +5,3 @@
5extra-y := head.o 5extra-y := head.o
6 6
7obj-y := ints-priority.o dma.o 7obj-y := ints-priority.o dma.o
8
9obj-$(CONFIG_CPU_FREQ) += cpu.o
diff --git a/arch/blackfin/mach-bf548/cpu.c b/arch/blackfin/mach-bf548/cpu.c
deleted file mode 100644
index 4298a3ccfbfc..000000000000
--- a/arch/blackfin/mach-bf548/cpu.c
+++ /dev/null
@@ -1,159 +0,0 @@
1/*
2 * File: arch/blackfin/mach-bf548/cpu.c
3 * Based on:
4 * Author:
5 *
6 * Created:
7 * Description: clock scaling for the bf54x
8 *
9 * Modified:
10 * Copyright 2004-2007 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=25000000 */
39#define VCO5 (CONFIG_CLKIN_HZ*45)
40#define VCO4 (CONFIG_CLKIN_HZ*36)
41#define VCO3 (CONFIG_CLKIN_HZ*27)
42#define VCO2 (CONFIG_CLKIN_HZ*18)
43#define VCO1 (CONFIG_CLKIN_HZ*9)
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 */
48static struct cpufreq_frequency_table bf548_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 */
60static int bf548_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
73static int bf548_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, bf548_freq_table, target_freq, relation, &index))
83 return -EINVAL;
84
85 cclk_mhz = bf548_freq_table[index].frequency;
86 vco_mhz = bf548_freq_table[index].index;
87
88 dpmc_fops.ioctl(NULL, NULL, IOCTL_CHANGE_FREQUENCY, &vco_mhz);
89 freqs.old = bf548_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 */
110static int bf548_verify_speed(struct cpufreq_policy *policy)
111{
112 return cpufreq_frequency_table_verify(policy, &bf548_freq_table);
113}
114
115static int __init __bf548_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 = bf548_getfreq(0);
125 cpufreq_frequency_table_get_attr(bf548_freq_table, policy->cpu);
126 return cpufreq_frequency_table_cpuinfo(policy, bf548_freq_table);
127}
128
129static struct freq_attr *bf548_freq_attr[] = {
130 &cpufreq_freq_attr_scaling_available_freqs,
131 NULL,
132};
133
134static struct cpufreq_driver bf548_driver = {
135 .verify = bf548_verify_speed,
136 .target = bf548_target,
137 .get = bf548_getfreq,
138 .init = __bf548_cpu_init,
139 .name = "bf548",
140 .owner = THIS_MODULE,
141 .attr = bf548_freq_attr,
142};
143
144static int __init bf548_cpu_init(void)
145{
146 return cpufreq_register_driver(&bf548_driver);
147}
148
149static void __exit bf548_cpu_exit(void)
150{
151 cpufreq_unregister_driver(&bf548_driver);
152}
153
154MODULE_AUTHOR("Mickael Kang");
155MODULE_DESCRIPTION("cpufreq driver for BF548 CPU");
156MODULE_LICENSE("GPL");
157
158module_init(bf548_cpu_init);
159module_exit(bf548_cpu_exit);
generated by cgit v1.2.2 (git 2.25.0) at 2024-11-11 01:56:04 -0500