diff options
Diffstat (limited to 'drivers/devfreq/governor_userspace.c')
| -rw-r--r-- | drivers/devfreq/governor_userspace.c | 56 |
1 files changed, 25 insertions, 31 deletions
diff --git a/drivers/devfreq/governor_userspace.c b/drivers/devfreq/governor_userspace.c index 77028c27593c..395174f93960 100644 --- a/drivers/devfreq/governor_userspace.c +++ b/drivers/devfreq/governor_userspace.c @@ -1,21 +1,19 @@ +// SPDX-License-Identifier: GPL-2.0-only /* * linux/drivers/devfreq/governor_userspace.c * * Copyright (C) 2011 Samsung Electronics * MyungJoo Ham <myungjoo.ham@samsung.com> - * - * 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. */ #include <linux/slab.h> #include <linux/device.h> #include <linux/devfreq.h> +#include <linux/devfreq-governor.h> +#include <linux/kstrtox.h> #include <linux/pm.h> #include <linux/mutex.h> #include <linux/module.h> -#include "governor.h" struct userspace_data { unsigned long user_frequency; @@ -24,36 +22,31 @@ struct userspace_data { static int devfreq_userspace_func(struct devfreq *df, unsigned long *freq) { - struct userspace_data *data = df->data; - - if (data->valid) { - unsigned long adjusted_freq = data->user_frequency; - - if (df->max_freq && adjusted_freq > df->max_freq) - adjusted_freq = df->max_freq; + struct userspace_data *data = df->governor_data; - if (df->min_freq && adjusted_freq < df->min_freq) - adjusted_freq = df->min_freq; - - *freq = adjusted_freq; - } else { + if (data->valid) + *freq = data->user_frequency; + else *freq = df->previous_freq; /* No user freq specified yet */ - } + return 0; } -static ssize_t store_freq(struct device *dev, struct device_attribute *attr, - const char *buf, size_t count) +static ssize_t set_freq_store(struct device *dev, struct device_attribute *attr, + const char *buf, size_t count) { struct devfreq *devfreq = to_devfreq(dev); struct userspace_data *data; unsigned long wanted; int err = 0; + err = kstrtoul(buf, 0, &wanted); + if (err) + return err; + mutex_lock(&devfreq->lock); - data = devfreq->data; + data = devfreq->governor_data; - sscanf(buf, "%lu", &wanted); data->user_frequency = wanted; data->valid = true; err = update_devfreq(devfreq); @@ -63,15 +56,15 @@ static ssize_t store_freq(struct device *dev, struct device_attribute *attr, return err; } -static ssize_t show_freq(struct device *dev, struct device_attribute *attr, - char *buf) +static ssize_t set_freq_show(struct device *dev, + struct device_attribute *attr, char *buf) { struct devfreq *devfreq = to_devfreq(dev); struct userspace_data *data; int err = 0; mutex_lock(&devfreq->lock); - data = devfreq->data; + data = devfreq->governor_data; if (data->valid) err = sprintf(buf, "%lu\n", data->user_frequency); @@ -81,13 +74,13 @@ static ssize_t show_freq(struct device *dev, struct device_attribute *attr, return err; } -static DEVICE_ATTR(set_freq, 0644, show_freq, store_freq); +static DEVICE_ATTR_RW(set_freq); static struct attribute *dev_entries[] = { &dev_attr_set_freq.attr, NULL, }; static const struct attribute_group dev_attr_group = { - .name = "userspace", + .name = DEVFREQ_GOV_USERSPACE, .attrs = dev_entries, }; @@ -102,7 +95,7 @@ static int userspace_init(struct devfreq *devfreq) goto out; } data->valid = false; - devfreq->data = data; + devfreq->governor_data = data; err = sysfs_create_group(&devfreq->dev.kobj, &dev_attr_group); out: @@ -118,8 +111,8 @@ static void userspace_exit(struct devfreq *devfreq) if (devfreq->dev.kobj.sd) sysfs_remove_group(&devfreq->dev.kobj, &dev_attr_group); - kfree(devfreq->data); - devfreq->data = NULL; + kfree(devfreq->governor_data); + devfreq->governor_data = NULL; } static int devfreq_userspace_handler(struct devfreq *devfreq, @@ -142,7 +135,7 @@ static int devfreq_userspace_handler(struct devfreq *devfreq, } static struct devfreq_governor devfreq_userspace = { - .name = "userspace", + .name = DEVFREQ_GOV_USERSPACE, .get_target_freq = devfreq_userspace_func, .event_handler = devfreq_userspace_handler, }; @@ -164,4 +157,5 @@ static void __exit devfreq_userspace_exit(void) return; } module_exit(devfreq_userspace_exit); +MODULE_DESCRIPTION("DEVFREQ Userspace governor"); MODULE_LICENSE("GPL"); |