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PM / devfreq: passive: Reduce duplicate code when passive_devfreq case

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In order to keep the consistent coding style between passive_devfreq
and passive_cpufreq, use common code for handling required opp property.
Also remove the unneed conditional statement and unify the comment
of both passive_devfreq and passive_cpufreq when getting the target frequency.

Tested-by: Chen-Yu Tsai <wenst@chromium.org>
Tested-by: Johnson Wang <johnson.wang@mediatek.com>
Signed-off-by: Chanwoo Choi <cw00.choi@samsung.com>
This commit is contained in:
Chanwoo Choi 2021-03-02 17:22:50 +09:00
parent a03dacb031
commit 05723e7123
1 changed files with 8 additions and 58 deletions
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66
drivers/devfreq/governor_passive.c
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@ -93,65 +93,16 @@ static int get_target_freq_with_devfreq(struct devfreq *devfreq,
= (struct devfreq_passive_data *)devfreq->data;
struct devfreq *parent_devfreq = (struct devfreq *)p_data->parent;
unsigned long child_freq = ULONG_MAX;
struct dev_pm_opp *opp, *p_opp;
int i, count;
/*
* If the devfreq device with passive governor has the specific method
* to determine the next frequency, should use the get_target_freq()
* of struct devfreq_passive_data.
*/
if (p_data->get_target_freq)
return p_data->get_target_freq(devfreq, freq);
/* Get target freq via required opps */
child_freq = get_target_freq_by_required_opp(parent_devfreq->dev.parent,
parent_devfreq->opp_table,
devfreq->opp_table, freq);
if (child_freq)
goto out;
/*
* If the parent and passive devfreq device uses the OPP table,
* get the next frequency by using the OPP table.
*/
/*
* - parent devfreq device uses the governors except for passive.
* - passive devfreq device uses the passive governor.
*
* Each devfreq has the OPP table. After deciding the new frequency
* from the governor of parent devfreq device, the passive governor
* need to get the index of new frequency on OPP table of parent
* device. And then the index is used for getting the suitable
* new frequency for passive devfreq device.
*/
if (!devfreq->profile || !devfreq->profile->freq_table
|| devfreq->profile->max_state <= 0)
return -EINVAL;
/*
* The passive governor have to get the correct frequency from OPP
* list of parent device. Because in this case, *freq is temporary
* value which is decided by ondemand governor.
*/
if (devfreq->opp_table && parent_devfreq->opp_table) {
p_opp = devfreq_recommended_opp(parent_devfreq->dev.parent,
freq, 0);
if (IS_ERR(p_opp))
return PTR_ERR(p_opp);
opp = dev_pm_opp_xlate_required_opp(parent_devfreq->opp_table,
devfreq->opp_table, p_opp);
dev_pm_opp_put(p_opp);
if (IS_ERR(opp))
goto no_required_opp;
*freq = dev_pm_opp_get_freq(opp);
dev_pm_opp_put(opp);
return 0;
}
no_required_opp:
/*
* Get the OPP table's index of decided frequency by governor
* of parent device.
*/
/* Use interpolation if required opps is not available */
for (i = 0; i < parent_devfreq->profile->max_state; i++)
if (parent_devfreq->profile->freq_table[i] == *freq)
break;
@ -159,7 +110,6 @@ no_required_opp:
if (i == parent_devfreq->profile->max_state)
return -EINVAL;
/* Get the suitable frequency by using index of parent device. */
if (i < devfreq->profile->max_state) {
child_freq = devfreq->profile->freq_table[i];
} else {
@ -167,7 +117,7 @@ no_required_opp:
child_freq = devfreq->profile->freq_table[count - 1];
}
/* Return the suitable frequency for passive device. */
out:
*freq = child_freq;
return 0;