Look at the required OPPs of the "parent" device to determine the OPP that
is required from the slave device managed by the passive governor. This
allows having mappings between a parent device and a slave device even when
they don't have the same number of OPPs.
Signed-off-by: Saravana Kannan <saravanak@xxxxxxxxxx>
---
drivers/devfreq/governor_passive.c | 25 +++++++++++++++++++++++--
1 file changed, 23 insertions(+), 2 deletions(-)
diff --git a/drivers/devfreq/governor_passive.c b/drivers/devfreq/governor_passive.c
index 3bc29acbd54e..bd4a98bb15b1 100644
--- a/drivers/devfreq/governor_passive.c
+++ b/drivers/devfreq/governor_passive.c
@@ -21,8 +21,9 @@ static int devfreq_passive_get_target_freq(struct devfreq *devfreq,
struct devfreq_passive_data *p_data
= (struct devfreq_passive_data *)devfreq->data;
struct devfreq *parent_devfreq = (struct devfreq *)p_data->parent;
+ struct opp_table *opp_table = NULL, *c_opp_table = NULL;
unsigned long child_freq = ULONG_MAX;
- struct dev_pm_opp *opp;
+ struct dev_pm_opp *opp = NULL, *c_opp = NULL;
int i, count, ret = 0;
/*
@@ -65,7 +66,20 @@ static int devfreq_passive_get_target_freq(struct devfreq *devfreq,
goto out;
}
- dev_pm_opp_put(opp);
+ opp_table = dev_pm_opp_get_opp_table(parent_devfreq->dev.parent);
+ if (IS_ERR_OR_NULL(opp_table)) {
+ ret = PTR_ERR(opp_table);
+ goto out;
+ }
+
+ c_opp_table = dev_pm_opp_get_opp_table(devfreq->dev.parent);
+ if (!IS_ERR_OR_NULL(c_opp_table))
+ c_opp = dev_pm_opp_xlate_opp(opp_table, c_opp_table, opp);
+ if (c_opp) {
+ *freq = dev_pm_opp_get_freq(c_opp);
+ dev_pm_opp_put(c_opp);
+ goto out;
+ }
/*
* Get the OPP table's index of decided freqeuncy by governor
@@ -92,6 +106,13 @@ static int devfreq_passive_get_target_freq(struct devfreq *devfreq,
*freq = child_freq;
out:
+ if (!IS_ERR_OR_NULL(opp_table))
+ dev_pm_opp_put_opp_table(opp_table);
+ if (!IS_ERR_OR_NULL(c_opp_table))
+ dev_pm_opp_put_opp_table(c_opp_table);
+ if (!IS_ERR_OR_NULL(opp))
+ dev_pm_opp_put(opp);
+
return ret;
}
--
2.22.0.rc2.383.gf4fbbf30c2-goog
