1*4882a593Smuzhiyun // SPDX-License-Identifier: GPL-2.0
2*4882a593Smuzhiyun /*
3*4882a593Smuzhiyun * Copyright (C) 2019 Google, Inc.
4*4882a593Smuzhiyun */
5*4882a593Smuzhiyun #include <linux/cpufreq.h>
6*4882a593Smuzhiyun #include <linux/module.h>
7*4882a593Smuzhiyun
8*4882a593Smuzhiyun static struct cpufreq_frequency_table freq_table[] = {
9*4882a593Smuzhiyun { .frequency = 1 },
10*4882a593Smuzhiyun { .frequency = 2 },
11*4882a593Smuzhiyun { .frequency = CPUFREQ_TABLE_END },
12*4882a593Smuzhiyun };
13*4882a593Smuzhiyun
dummy_cpufreq_target_index(struct cpufreq_policy * policy,unsigned int index)14*4882a593Smuzhiyun static int dummy_cpufreq_target_index(struct cpufreq_policy *policy,
15*4882a593Smuzhiyun unsigned int index)
16*4882a593Smuzhiyun {
17*4882a593Smuzhiyun return 0;
18*4882a593Smuzhiyun }
19*4882a593Smuzhiyun
dummy_cpufreq_driver_init(struct cpufreq_policy * policy)20*4882a593Smuzhiyun static int dummy_cpufreq_driver_init(struct cpufreq_policy *policy)
21*4882a593Smuzhiyun {
22*4882a593Smuzhiyun policy->freq_table = freq_table;
23*4882a593Smuzhiyun return 0;
24*4882a593Smuzhiyun }
25*4882a593Smuzhiyun
dummy_cpufreq_get(unsigned int cpu)26*4882a593Smuzhiyun static unsigned int dummy_cpufreq_get(unsigned int cpu)
27*4882a593Smuzhiyun {
28*4882a593Smuzhiyun return 1;
29*4882a593Smuzhiyun }
30*4882a593Smuzhiyun
dummy_cpufreq_verify(struct cpufreq_policy_data * data)31*4882a593Smuzhiyun static int dummy_cpufreq_verify(struct cpufreq_policy_data *data)
32*4882a593Smuzhiyun {
33*4882a593Smuzhiyun return 0;
34*4882a593Smuzhiyun }
35*4882a593Smuzhiyun
36*4882a593Smuzhiyun static struct cpufreq_driver dummy_cpufreq_driver = {
37*4882a593Smuzhiyun .name = "dummy",
38*4882a593Smuzhiyun .target_index = dummy_cpufreq_target_index,
39*4882a593Smuzhiyun .init = dummy_cpufreq_driver_init,
40*4882a593Smuzhiyun .get = dummy_cpufreq_get,
41*4882a593Smuzhiyun .verify = dummy_cpufreq_verify,
42*4882a593Smuzhiyun .attr = cpufreq_generic_attr,
43*4882a593Smuzhiyun };
44*4882a593Smuzhiyun
dummy_cpufreq_init(void)45*4882a593Smuzhiyun static int __init dummy_cpufreq_init(void)
46*4882a593Smuzhiyun {
47*4882a593Smuzhiyun return cpufreq_register_driver(&dummy_cpufreq_driver);
48*4882a593Smuzhiyun }
49*4882a593Smuzhiyun
dummy_cpufreq_exit(void)50*4882a593Smuzhiyun static void __exit dummy_cpufreq_exit(void)
51*4882a593Smuzhiyun {
52*4882a593Smuzhiyun cpufreq_unregister_driver(&dummy_cpufreq_driver);
53*4882a593Smuzhiyun }
54*4882a593Smuzhiyun
55*4882a593Smuzhiyun module_init(dummy_cpufreq_init);
56*4882a593Smuzhiyun module_exit(dummy_cpufreq_exit);
57*4882a593Smuzhiyun
58*4882a593Smuzhiyun MODULE_AUTHOR("Connor O'Brien <connoro@google.com>");
59*4882a593Smuzhiyun MODULE_DESCRIPTION("dummy cpufreq driver");
60*4882a593Smuzhiyun MODULE_LICENSE("GPL");
61