From ace9429bb58fd418f0c81d4c2835699bddf6bde6 Mon Sep 17 00:00:00 2001 From: Daniel Baumann Date: Thu, 11 Apr 2024 10:27:49 +0200 Subject: Adding upstream version 6.6.15. Signed-off-by: Daniel Baumann --- drivers/devfreq/governor_powersave.c | 61 ++++++++++++++++++++++++++++++++++++ 1 file changed, 61 insertions(+) create mode 100644 drivers/devfreq/governor_powersave.c (limited to 'drivers/devfreq/governor_powersave.c') diff --git a/drivers/devfreq/governor_powersave.c b/drivers/devfreq/governor_powersave.c new file mode 100644 index 0000000000..4746af2435 --- /dev/null +++ b/drivers/devfreq/governor_powersave.c @@ -0,0 +1,61 @@ +// SPDX-License-Identifier: GPL-2.0-only +/* + * linux/drivers/devfreq/governor_powersave.c + * + * Copyright (C) 2011 Samsung Electronics + * MyungJoo Ham + */ + +#include +#include +#include "governor.h" + +static int devfreq_powersave_func(struct devfreq *df, + unsigned long *freq) +{ + /* + * target callback should be able to get ceiling value as + * said in devfreq.h + */ + *freq = DEVFREQ_MIN_FREQ; + return 0; +} + +static int devfreq_powersave_handler(struct devfreq *devfreq, + unsigned int event, void *data) +{ + int ret = 0; + + if (event == DEVFREQ_GOV_START) { + mutex_lock(&devfreq->lock); + ret = update_devfreq(devfreq); + mutex_unlock(&devfreq->lock); + } + + return ret; +} + +static struct devfreq_governor devfreq_powersave = { + .name = DEVFREQ_GOV_POWERSAVE, + .get_target_freq = devfreq_powersave_func, + .event_handler = devfreq_powersave_handler, +}; + +static int __init devfreq_powersave_init(void) +{ + return devfreq_add_governor(&devfreq_powersave); +} +subsys_initcall(devfreq_powersave_init); + +static void __exit devfreq_powersave_exit(void) +{ + int ret; + + ret = devfreq_remove_governor(&devfreq_powersave); + if (ret) + pr_err("%s: failed remove governor %d\n", __func__, ret); + + return; +} +module_exit(devfreq_powersave_exit); +MODULE_LICENSE("GPL"); -- cgit v1.2.3