Donate to e Foundation | Murena handsets with /e/OS | Own a part of Murena! Learn more

Commit ab8f58ad authored by Chanwoo Choi's avatar Chanwoo Choi Committed by MyungJoo Ham
Browse files

PM / devfreq: Set min/max_freq when adding the devfreq device 



Prior to that, the min/max_freq of the devfreq device are always zero
before the user changes the min/max_freq through sysfs entries.
It might make the confusion for the min/max_freq.

This patch initializes the available min/max_freq by using the OPP
during adding the devfreq device.

Signed-off-by: default avatarChanwoo Choi <cw00.choi@samsung.com>
Signed-off-by: default avatarMyungJoo Ham <myungjoo.ham@samsung.com>
parent bb176f67

drivers/devfreq/devfreq.c

+42 −0
Original line number Diff line number Diff line
@@ -69,6 +69,34 @@ static struct devfreq *find_device_devfreq(struct device *dev) 
	return ERR_PTR(-ENODEV);

}



static unsigned long find_available_min_freq(struct devfreq *devfreq)

{

	struct dev_pm_opp *opp;

	unsigned long min_freq = 0;



	opp = dev_pm_opp_find_freq_ceil(devfreq->dev.parent, &min_freq);

	if (IS_ERR(opp))

		min_freq = 0;

	else

		dev_pm_opp_put(opp);



	return min_freq;

}



static unsigned long find_available_max_freq(struct devfreq *devfreq)

{

	struct dev_pm_opp *opp;

	unsigned long max_freq = ULONG_MAX;



	opp = dev_pm_opp_find_freq_floor(devfreq->dev.parent, &max_freq);

	if (IS_ERR(opp))

		max_freq = 0;

	else

		dev_pm_opp_put(opp);



	return max_freq;

}



/**

 * devfreq_get_freq_level() - Lookup freq_table for the frequency

 * @devfreq:	the devfreq instance
@@ -559,6 +587,20 @@ struct devfreq *devfreq_add_device(struct device *dev, 
		mutex_lock(&devfreq->lock);

	}



	devfreq->min_freq = find_available_min_freq(devfreq);

	if (!devfreq->min_freq) {

		mutex_unlock(&devfreq->lock);

		err = -EINVAL;

		goto err_dev;

	}



	devfreq->max_freq = find_available_max_freq(devfreq);

	if (!devfreq->max_freq) {

		mutex_unlock(&devfreq->lock);

		err = -EINVAL;

		goto err_dev;

	}



	dev_set_name(&devfreq->dev, "devfreq%d",

				atomic_inc_return(&devfreq_no));

	err = device_register(&devfreq->dev);