projects / mirror_ubuntu-zesty-kernel.git / blame
| Commit | Line | Data |
|---|---|---|
| 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"); |