Commit | Line | Data |
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aa1acb04 | 1 | /* |
2 | * db8500_cpufreq_cooling.c - DB8500 cpufreq works as cooling device. | |
3 | * | |
4 | * Copyright (C) 2012 ST-Ericsson | |
5 | * Copyright (C) 2012 Linaro Ltd. | |
6 | * | |
7 | * Author: Hongbo Zhang <hongbo.zhang@linaro.com> | |
8 | * | |
9 | * This program is free software; you can redistribute it and/or modify | |
10 | * it under the terms of the GNU General Public License as published by | |
11 | * the Free Software Foundation; either version 2 of the License, or | |
12 | * (at your option) any later version. | |
13 | * | |
14 | * This program is distributed in the hope that it will be useful, | |
15 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
16 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
17 | * GNU General Public License for more details. | |
18 | */ | |
19 | ||
20 | #include <linux/cpu_cooling.h> | |
aa1acb04 | 21 | #include <linux/err.h> |
22 | #include <linux/module.h> | |
c076fc42 | 23 | #include <linux/of.h> |
aa1acb04 | 24 | #include <linux/platform_device.h> |
25 | #include <linux/slab.h> | |
26 | ||
27 | static int db8500_cpufreq_cooling_probe(struct platform_device *pdev) | |
28 | { | |
29 | struct thermal_cooling_device *cdev; | |
aa1acb04 | 30 | |
b45257b1 | 31 | cdev = cpufreq_cooling_register(cpu_present_mask); |
70d23b29 | 32 | if (IS_ERR(cdev)) { |
38cbf041 EV |
33 | int ret = PTR_ERR(cdev); |
34 | ||
35 | if (ret != -EPROBE_DEFER) | |
36 | dev_err(&pdev->dev, | |
37 | "Failed to register cooling device %d\n", | |
38 | ret); | |
39 | ||
40 | return ret; | |
aa1acb04 | 41 | } |
42 | ||
43 | platform_set_drvdata(pdev, cdev); | |
44 | ||
45 | dev_info(&pdev->dev, "Cooling device registered: %s\n", cdev->type); | |
46 | ||
47 | return 0; | |
48 | } | |
49 | ||
50 | static int db8500_cpufreq_cooling_remove(struct platform_device *pdev) | |
51 | { | |
52 | struct thermal_cooling_device *cdev = platform_get_drvdata(pdev); | |
53 | ||
54 | cpufreq_cooling_unregister(cdev); | |
55 | ||
56 | return 0; | |
57 | } | |
58 | ||
59 | static int db8500_cpufreq_cooling_suspend(struct platform_device *pdev, | |
60 | pm_message_t state) | |
61 | { | |
62 | return -ENOSYS; | |
63 | } | |
64 | ||
65 | static int db8500_cpufreq_cooling_resume(struct platform_device *pdev) | |
66 | { | |
67 | return -ENOSYS; | |
68 | } | |
69 | ||
70 | #ifdef CONFIG_OF | |
71 | static const struct of_device_id db8500_cpufreq_cooling_match[] = { | |
72 | { .compatible = "stericsson,db8500-cpufreq-cooling" }, | |
73 | {}, | |
74 | }; | |
0847e26a | 75 | MODULE_DEVICE_TABLE(of, db8500_cpufreq_cooling_match); |
aa1acb04 | 76 | #endif |
77 | ||
78 | static struct platform_driver db8500_cpufreq_cooling_driver = { | |
79 | .driver = { | |
aa1acb04 | 80 | .name = "db8500-cpufreq-cooling", |
c076fc42 | 81 | .of_match_table = of_match_ptr(db8500_cpufreq_cooling_match), |
aa1acb04 | 82 | }, |
83 | .probe = db8500_cpufreq_cooling_probe, | |
84 | .suspend = db8500_cpufreq_cooling_suspend, | |
85 | .resume = db8500_cpufreq_cooling_resume, | |
86 | .remove = db8500_cpufreq_cooling_remove, | |
87 | }; | |
88 | ||
89 | static int __init db8500_cpufreq_cooling_init(void) | |
90 | { | |
91 | return platform_driver_register(&db8500_cpufreq_cooling_driver); | |
92 | } | |
93 | ||
94 | static void __exit db8500_cpufreq_cooling_exit(void) | |
95 | { | |
96 | platform_driver_unregister(&db8500_cpufreq_cooling_driver); | |
97 | } | |
98 | ||
99 | /* Should be later than db8500_cpufreq_register */ | |
100 | late_initcall(db8500_cpufreq_cooling_init); | |
101 | module_exit(db8500_cpufreq_cooling_exit); | |
102 | ||
103 | MODULE_AUTHOR("Hongbo Zhang <hongbo.zhang@stericsson.com>"); | |
104 | MODULE_DESCRIPTION("DB8500 cpufreq cooling driver"); | |
105 | MODULE_LICENSE("GPL"); |