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hongbo.zhangaa1acb02012-11-15 18:56:42 +08001/*
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>
hongbo.zhangaa1acb02012-11-15 18:56:42 +080021#include <linux/err.h>
22#include <linux/module.h>
Sachin Kamatc076fc42012-12-19 14:20:59 +053023#include <linux/of.h>
hongbo.zhangaa1acb02012-11-15 18:56:42 +080024#include <linux/platform_device.h>
25#include <linux/slab.h>
26
27static int db8500_cpufreq_cooling_probe(struct platform_device *pdev)
28{
29 struct thermal_cooling_device *cdev;
hongbo.zhangaa1acb02012-11-15 18:56:42 +080030
Viresh Kumarb45257b2014-12-04 09:41:44 +053031 cdev = cpufreq_cooling_register(cpu_present_mask);
Eduardo Valentin70d23b22013-04-25 14:13:34 +000032 if (IS_ERR(cdev)) {
Eduardo Valentin38cbf042014-12-12 09:58:29 -040033 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;
hongbo.zhangaa1acb02012-11-15 18:56:42 +080041 }
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
50static 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
59static int db8500_cpufreq_cooling_suspend(struct platform_device *pdev,
60 pm_message_t state)
61{
62 return -ENOSYS;
63}
64
65static int db8500_cpufreq_cooling_resume(struct platform_device *pdev)
66{
67 return -ENOSYS;
68}
69
70#ifdef CONFIG_OF
71static const struct of_device_id db8500_cpufreq_cooling_match[] = {
72 { .compatible = "stericsson,db8500-cpufreq-cooling" },
73 {},
74};
Luis de Bethencourt0847e262015-09-03 13:10:14 +020075MODULE_DEVICE_TABLE(of, db8500_cpufreq_cooling_match);
hongbo.zhangaa1acb02012-11-15 18:56:42 +080076#endif
77
78static struct platform_driver db8500_cpufreq_cooling_driver = {
79 .driver = {
hongbo.zhangaa1acb02012-11-15 18:56:42 +080080 .name = "db8500-cpufreq-cooling",
Sachin Kamatc076fc42012-12-19 14:20:59 +053081 .of_match_table = of_match_ptr(db8500_cpufreq_cooling_match),
hongbo.zhangaa1acb02012-11-15 18:56:42 +080082 },
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
89static int __init db8500_cpufreq_cooling_init(void)
90{
91 return platform_driver_register(&db8500_cpufreq_cooling_driver);
92}
93
94static 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 */
100late_initcall(db8500_cpufreq_cooling_init);
101module_exit(db8500_cpufreq_cooling_exit);
102
103MODULE_AUTHOR("Hongbo Zhang <hongbo.zhang@stericsson.com>");
104MODULE_DESCRIPTION("DB8500 cpufreq cooling driver");
105MODULE_LICENSE("GPL");