| 1 | // SPDX-License-Identifier: GPL-2.0-only |
|---|---|
| 2 | /* |
| 3 | * linux/drivers/devfreq/governor_performance.c |
| 4 | * |
| 5 | * Copyright (C) 2011 Samsung Electronics |
| 6 | * MyungJoo Ham <myungjoo.ham@samsung.com> |
| 7 | */ |
| 8 | |
| 9 | #include <linux/devfreq.h> |
| 10 | #include <linux/module.h> |
| 11 | #include "governor.h" |
| 12 | |
| 13 | static int devfreq_performance_func(struct devfreq *df, |
| 14 | unsigned long *freq) |
| 15 | { |
| 16 | /* |
| 17 | * target callback should be able to get floor value as |
| 18 | * said in devfreq.h |
| 19 | */ |
| 20 | *freq = DEVFREQ_MAX_FREQ; |
| 21 | return 0; |
| 22 | } |
| 23 | |
| 24 | static int devfreq_performance_handler(struct devfreq *devfreq, |
| 25 | unsigned int event, void *data) |
| 26 | { |
| 27 | int ret = 0; |
| 28 | |
| 29 | if (event == DEVFREQ_GOV_START) { |
| 30 | mutex_lock(&devfreq->lock); |
| 31 | ret = update_devfreq(devfreq); |
| 32 | mutex_unlock(lock: &devfreq->lock); |
| 33 | } |
| 34 | |
| 35 | return ret; |
| 36 | } |
| 37 | |
| 38 | static struct devfreq_governor devfreq_performance = { |
| 39 | .name = DEVFREQ_GOV_PERFORMANCE, |
| 40 | .get_target_freq = devfreq_performance_func, |
| 41 | .event_handler = devfreq_performance_handler, |
| 42 | }; |
| 43 | |
| 44 | static int __init devfreq_performance_init(void) |
| 45 | { |
| 46 | return devfreq_add_governor(governor: &devfreq_performance); |
| 47 | } |
| 48 | subsys_initcall(devfreq_performance_init); |
| 49 | |
| 50 | static void __exit devfreq_performance_exit(void) |
| 51 | { |
| 52 | int ret; |
| 53 | |
| 54 | ret = devfreq_remove_governor(governor: &devfreq_performance); |
| 55 | if (ret) |
| 56 | pr_err("%s: failed remove governor %d\n", __func__, ret); |
| 57 | |
| 58 | return; |
| 59 | } |
| 60 | module_exit(devfreq_performance_exit); |
| 61 | MODULE_LICENSE("GPL"); |
| 62 |