diff options
Diffstat (limited to 'drivers/devfreq/governor_simpleondemand.c')
| -rw-r--r-- | drivers/devfreq/governor_simpleondemand.c | 65 |
1 files changed, 31 insertions, 34 deletions
diff --git a/drivers/devfreq/governor_simpleondemand.c b/drivers/devfreq/governor_simpleondemand.c index 0720ba84ca92..ac9c5e9e51a4 100644 --- a/drivers/devfreq/governor_simpleondemand.c +++ b/drivers/devfreq/governor_simpleondemand.c @@ -1,37 +1,36 @@ +// SPDX-License-Identifier: GPL-2.0-only /* * linux/drivers/devfreq/governor_simpleondemand.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/errno.h> #include <linux/module.h> #include <linux/devfreq.h> +#include <linux/devfreq-governor.h> #include <linux/math64.h> -#include "governor.h" /* Default constants for DevFreq-Simple-Ondemand (DFSO) */ #define DFSO_UPTHRESHOLD (90) -#define DFSO_DOWNDIFFERENCTIAL (5) +#define DFSO_DOWNDIFFERENTIAL (5) static int devfreq_simple_ondemand_func(struct devfreq *df, unsigned long *freq) { - struct devfreq_dev_status stat; - int err = df->profile->get_dev_status(df->dev.parent, &stat); + int err; + struct devfreq_dev_status *stat; unsigned long long a, b; unsigned int dfso_upthreshold = DFSO_UPTHRESHOLD; - unsigned int dfso_downdifferential = DFSO_DOWNDIFFERENCTIAL; + unsigned int dfso_downdifferential = DFSO_DOWNDIFFERENTIAL; struct devfreq_simple_ondemand_data *data = df->data; - unsigned long max = (df->max_freq) ? df->max_freq : UINT_MAX; + err = devfreq_update_stats(df); if (err) return err; + stat = &df->last_status; + if (data) { if (data->upthreshold) dfso_upthreshold = data->upthreshold; @@ -43,50 +42,45 @@ static int devfreq_simple_ondemand_func(struct devfreq *df, return -EINVAL; /* Assume MAX if it is going to be divided by zero */ - if (stat.total_time == 0) { - *freq = max; + if (stat->total_time == 0) { + *freq = DEVFREQ_MAX_FREQ; return 0; } /* Prevent overflow */ - if (stat.busy_time >= (1 << 24) || stat.total_time >= (1 << 24)) { - stat.busy_time >>= 7; - stat.total_time >>= 7; + if (stat->busy_time >= (1 << 24) || stat->total_time >= (1 << 24)) { + stat->busy_time >>= 7; + stat->total_time >>= 7; } /* Set MAX if it's busy enough */ - if (stat.busy_time * 100 > - stat.total_time * dfso_upthreshold) { - *freq = max; + if (stat->busy_time * 100 > + stat->total_time * dfso_upthreshold) { + *freq = DEVFREQ_MAX_FREQ; return 0; } /* Set MAX if we do not know the initial frequency */ - if (stat.current_frequency == 0) { - *freq = max; + if (stat->current_frequency == 0) { + *freq = DEVFREQ_MAX_FREQ; return 0; } /* Keep the current frequency */ - if (stat.busy_time * 100 > - stat.total_time * (dfso_upthreshold - dfso_downdifferential)) { - *freq = stat.current_frequency; + if (stat->busy_time * 100 > + stat->total_time * (dfso_upthreshold - dfso_downdifferential)) { + *freq = stat->current_frequency; return 0; } /* Set the desired frequency based on the load */ - a = stat.busy_time; - a *= stat.current_frequency; - b = div_u64(a, stat.total_time); + a = stat->busy_time; + a *= stat->current_frequency; + b = div_u64(a, stat->total_time); b *= 100; b = div_u64(b, (dfso_upthreshold - dfso_downdifferential / 2)); *freq = (unsigned long) b; - if (df->min_freq && *freq < df->min_freq) - *freq = df->min_freq; - if (df->max_freq && *freq > df->max_freq) - *freq = df->max_freq; - return 0; } @@ -102,8 +96,8 @@ static int devfreq_simple_ondemand_handler(struct devfreq *devfreq, devfreq_monitor_stop(devfreq); break; - case DEVFREQ_GOV_INTERVAL: - devfreq_interval_update(devfreq, (unsigned int *)data); + case DEVFREQ_GOV_UPDATE_INTERVAL: + devfreq_update_interval(devfreq, (unsigned int *)data); break; case DEVFREQ_GOV_SUSPEND: @@ -122,7 +116,9 @@ static int devfreq_simple_ondemand_handler(struct devfreq *devfreq, } static struct devfreq_governor devfreq_simple_ondemand = { - .name = "simple_ondemand", + .name = DEVFREQ_GOV_SIMPLE_ONDEMAND, + .attrs = DEVFREQ_GOV_ATTR_POLLING_INTERVAL + | DEVFREQ_GOV_ATTR_TIMER, .get_target_freq = devfreq_simple_ondemand_func, .event_handler = devfreq_simple_ondemand_handler, }; @@ -144,4 +140,5 @@ static void __exit devfreq_simple_ondemand_exit(void) return; } module_exit(devfreq_simple_ondemand_exit); +MODULE_DESCRIPTION("DEVFREQ Simple On-demand governor"); MODULE_LICENSE("GPL"); |