mirror of
https://github.com/edk2-porting/linux-next.git
synced 2024-12-16 17:23:55 +08:00
PM / devfreq: Use the available min/max frequency
The commit a76caf55e5
("thermal: Add devfreq cooling") is able
to disable OPP as a cooling device. In result, both update_devfreq()
and {min|max}_freq_show() have to consider the 'opp->available'
status of each OPP.
So, this patch adds the 'scaling_{min|max}_freq' to struct devfreq
in order to indicate the available mininum and maximum frequency
by adjusting OPP interface such as dev_pm_opp_{disable|enable}().
The 'scaling_{min|max}_freq' are used for on both update_devfreq()
and {min|max}_freq_show().
Signed-off-by: Chanwoo Choi <cw00.choi@samsung.com>
Signed-off-by: MyungJoo Ham <myungjoo.ham@samsung.com>
This commit is contained in:
parent
1051e2c304
commit
f1d981eaec
@ -28,6 +28,9 @@
|
||||
#include <linux/of.h>
|
||||
#include "governor.h"
|
||||
|
||||
#define MAX(a,b) ((a > b) ? a : b)
|
||||
#define MIN(a,b) ((a < b) ? a : b)
|
||||
|
||||
static struct class *devfreq_class;
|
||||
|
||||
/*
|
||||
@ -255,7 +258,7 @@ static int devfreq_notify_transition(struct devfreq *devfreq,
|
||||
int update_devfreq(struct devfreq *devfreq)
|
||||
{
|
||||
struct devfreq_freqs freqs;
|
||||
unsigned long freq, cur_freq;
|
||||
unsigned long freq, cur_freq, min_freq, max_freq;
|
||||
int err = 0;
|
||||
u32 flags = 0;
|
||||
|
||||
@ -273,19 +276,21 @@ int update_devfreq(struct devfreq *devfreq)
|
||||
return err;
|
||||
|
||||
/*
|
||||
* Adjust the frequency with user freq and QoS.
|
||||
* Adjust the frequency with user freq, QoS and available freq.
|
||||
*
|
||||
* List from the highest priority
|
||||
* max_freq
|
||||
* min_freq
|
||||
*/
|
||||
max_freq = MIN(devfreq->scaling_max_freq, devfreq->max_freq);
|
||||
min_freq = MAX(devfreq->scaling_min_freq, devfreq->min_freq);
|
||||
|
||||
if (devfreq->min_freq && freq < devfreq->min_freq) {
|
||||
freq = devfreq->min_freq;
|
||||
if (min_freq && freq < min_freq) {
|
||||
freq = min_freq;
|
||||
flags &= ~DEVFREQ_FLAG_LEAST_UPPER_BOUND; /* Use GLB */
|
||||
}
|
||||
if (devfreq->max_freq && freq > devfreq->max_freq) {
|
||||
freq = devfreq->max_freq;
|
||||
if (max_freq && freq > max_freq) {
|
||||
freq = max_freq;
|
||||
flags |= DEVFREQ_FLAG_LEAST_UPPER_BOUND; /* Use LUB */
|
||||
}
|
||||
|
||||
@ -494,6 +499,19 @@ static int devfreq_notifier_call(struct notifier_block *nb, unsigned long type,
|
||||
int ret;
|
||||
|
||||
mutex_lock(&devfreq->lock);
|
||||
|
||||
devfreq->scaling_min_freq = find_available_min_freq(devfreq);
|
||||
if (!devfreq->scaling_min_freq) {
|
||||
mutex_unlock(&devfreq->lock);
|
||||
return -EINVAL;
|
||||
}
|
||||
|
||||
devfreq->scaling_max_freq = find_available_max_freq(devfreq);
|
||||
if (!devfreq->scaling_max_freq) {
|
||||
mutex_unlock(&devfreq->lock);
|
||||
return -EINVAL;
|
||||
}
|
||||
|
||||
ret = update_devfreq(devfreq);
|
||||
mutex_unlock(&devfreq->lock);
|
||||
|
||||
@ -593,6 +611,7 @@ struct devfreq *devfreq_add_device(struct device *dev,
|
||||
err = -EINVAL;
|
||||
goto err_dev;
|
||||
}
|
||||
devfreq->scaling_min_freq = devfreq->min_freq;
|
||||
|
||||
devfreq->max_freq = find_available_max_freq(devfreq);
|
||||
if (!devfreq->max_freq) {
|
||||
@ -600,6 +619,7 @@ struct devfreq *devfreq_add_device(struct device *dev,
|
||||
err = -EINVAL;
|
||||
goto err_dev;
|
||||
}
|
||||
devfreq->scaling_max_freq = devfreq->max_freq;
|
||||
|
||||
dev_set_name(&devfreq->dev, "devfreq%d",
|
||||
atomic_inc_return(&devfreq_no));
|
||||
@ -1127,7 +1147,9 @@ unlock:
|
||||
static ssize_t min_freq_show(struct device *dev, struct device_attribute *attr,
|
||||
char *buf)
|
||||
{
|
||||
return sprintf(buf, "%lu\n", to_devfreq(dev)->min_freq);
|
||||
struct devfreq *df = to_devfreq(dev);
|
||||
|
||||
return sprintf(buf, "%lu\n", MAX(df->scaling_min_freq, df->min_freq));
|
||||
}
|
||||
|
||||
static ssize_t max_freq_store(struct device *dev, struct device_attribute *attr,
|
||||
@ -1161,7 +1183,9 @@ static DEVICE_ATTR_RW(min_freq);
|
||||
static ssize_t max_freq_show(struct device *dev, struct device_attribute *attr,
|
||||
char *buf)
|
||||
{
|
||||
return sprintf(buf, "%lu\n", to_devfreq(dev)->max_freq);
|
||||
struct devfreq *df = to_devfreq(dev);
|
||||
|
||||
return sprintf(buf, "%lu\n", MIN(df->scaling_max_freq, df->max_freq));
|
||||
}
|
||||
static DEVICE_ATTR_RW(max_freq);
|
||||
|
||||
|
@ -120,6 +120,8 @@ struct devfreq_dev_profile {
|
||||
* touch this.
|
||||
* @min_freq: Limit minimum frequency requested by user (0: none)
|
||||
* @max_freq: Limit maximum frequency requested by user (0: none)
|
||||
* @scaling_min_freq: Limit minimum frequency requested by OPP interface
|
||||
* @scaling_max_freq: Limit maximum frequency requested by OPP interface
|
||||
* @stop_polling: devfreq polling status of a device.
|
||||
* @total_trans: Number of devfreq transitions
|
||||
* @trans_table: Statistics of devfreq transitions
|
||||
@ -153,6 +155,8 @@ struct devfreq {
|
||||
|
||||
unsigned long min_freq;
|
||||
unsigned long max_freq;
|
||||
unsigned long scaling_min_freq;
|
||||
unsigned long scaling_max_freq;
|
||||
bool stop_polling;
|
||||
|
||||
/* information for device frequency transition */
|
||||
|
Loading…
Reference in New Issue
Block a user