d2912cb15b
Based on 2 normalized pattern(s): this program is free software you can redistribute it and or modify it under the terms of the gnu general public license version 2 as published by the free software foundation this program is free software you can redistribute it and or modify it under the terms of the gnu general public license version 2 as published by the free software foundation # extracted by the scancode license scanner the SPDX license identifier GPL-2.0-only has been chosen to replace the boilerplate/reference in 4122 file(s). Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Reviewed-by: Enrico Weigelt <info@metux.net> Reviewed-by: Kate Stewart <kstewart@linuxfoundation.org> Reviewed-by: Allison Randal <allison@lohutok.net> Cc: linux-spdx@vger.kernel.org Link: https://lkml.kernel.org/r/20190604081206.933168790@linutronix.de Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
62 lines
1.3 KiB
C
62 lines
1.3 KiB
C
// SPDX-License-Identifier: GPL-2.0-only
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/*
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* linux/drivers/devfreq/governor_powersave.c
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*
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* Copyright (C) 2011 Samsung Electronics
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* MyungJoo Ham <myungjoo.ham@samsung.com>
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*/
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#include <linux/devfreq.h>
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#include <linux/module.h>
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#include "governor.h"
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static int devfreq_powersave_func(struct devfreq *df,
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unsigned long *freq)
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{
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/*
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* target callback should be able to get ceiling value as
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* said in devfreq.h
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*/
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*freq = DEVFREQ_MIN_FREQ;
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return 0;
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}
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static int devfreq_powersave_handler(struct devfreq *devfreq,
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unsigned int event, void *data)
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{
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int ret = 0;
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if (event == DEVFREQ_GOV_START) {
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mutex_lock(&devfreq->lock);
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ret = update_devfreq(devfreq);
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mutex_unlock(&devfreq->lock);
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}
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return ret;
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}
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static struct devfreq_governor devfreq_powersave = {
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.name = DEVFREQ_GOV_POWERSAVE,
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.get_target_freq = devfreq_powersave_func,
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.event_handler = devfreq_powersave_handler,
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};
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static int __init devfreq_powersave_init(void)
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{
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return devfreq_add_governor(&devfreq_powersave);
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}
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subsys_initcall(devfreq_powersave_init);
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static void __exit devfreq_powersave_exit(void)
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{
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int ret;
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ret = devfreq_remove_governor(&devfreq_powersave);
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if (ret)
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pr_err("%s: failed remove governor %d\n", __func__, ret);
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return;
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}
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module_exit(devfreq_powersave_exit);
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MODULE_LICENSE("GPL");
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