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