projects / deliverable / linux.git / blame
| Commit | Line | Data |
|---|---|---|
| ce26c5bb MH |
1 | /* |
| 2 | * linux/drivers/devfreq/governor_performance.c | |
| 3 | * | |
| 4 | * Copyright (C) 2011 Samsung Electronics | |
| 5 | * MyungJoo Ham <myungjoo.ham@samsung.com> | |
| 6 | * | |
| 7 | * This program is free software; you can redistribute it and/or modify | |
| 8 | * it under the terms of the GNU General Public License version 2 as | |
| 9 | * published by the Free Software Foundation. | |
| 10 | */ | |
| 11 | ||
| 12 | #include <linux/devfreq.h> | |
| 0b7c328f | 13 | #include "governor.h" |
| ce26c5bb MH |
14 | |
| 15 | static int devfreq_performance_func(struct devfreq *df, | |
| 16 | unsigned long *freq) | |
| 17 | { | |
| 18 | /* | |
| 19 | * target callback should be able to get floor value as | |
| 20 | * said in devfreq.h | |
| 21 | */ | |
| 6530b9de MH |
22 | if (!df->max_freq) |
| 23 | *freq = UINT_MAX; | |
| 24 | else | |
| 25 | *freq = df->max_freq; | |
| ce26c5bb MH |
26 | return 0; |
| 27 | } | |
| 28 | ||
| 7e6fdd4b RV |
29 | static int devfreq_performance_handler(struct devfreq *devfreq, |
| 30 | unsigned int event, void *data) | |
| 0b7c328f | 31 | { |
| 7e6fdd4b RV |
32 | int ret = 0; |
| 33 | ||
| 34 | if (event == DEVFREQ_GOV_START) { | |
| 35 | mutex_lock(&devfreq->lock); | |
| 36 | ret = update_devfreq(devfreq); | |
| 37 | mutex_unlock(&devfreq->lock); | |
| 38 | } | |
| 39 | ||
| 40 | return ret; | |
| 0b7c328f XC |
41 | } |
| 42 | ||
| ce26c5bb MH |
43 | const struct devfreq_governor devfreq_performance = { |
| 44 | .name = "performance", | |
| 45 | .get_target_freq = devfreq_performance_func, | |
| 7e6fdd4b | 46 | .event_handler = devfreq_performance_handler, |
| ce26c5bb | 47 | }; |
| 83116e66 NM |
48 | |
| 49 | static int __init devfreq_performance_init(void) | |
| 50 | { | |
| 51 | return devfreq_add_governor(&devfreq_performance); | |
| 52 | } | |
| 53 | subsys_initcall(devfreq_performance_init); | |
| 54 | ||
| 55 | static void __exit devfreq_performance_exit(void) | |
| 56 | { | |
| 57 | int ret; | |
| 58 | ||
| 59 | ret = devfreq_remove_governor(&devfreq_performance); | |
| 60 | if (ret) | |
| 61 | pr_err("%s: failed remove governor %d\n", __func__, ret); | |
| 62 | ||
| 63 | return; | |
| 64 | } | |
| 65 | module_exit(devfreq_performance_exit); |