Messages in this thread Patch in this message | | | Date | Wed, 17 Jul 2019 15:23:40 -0700 | Subject | [PATCH v3 5/5] PM / devfreq: Add required OPPs support to passive governor | From | Saravana Kannan <> |
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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@google.com> Acked-by: MyungJoo Ham <myungjoo.ham@samsung.com> Acked-by: Chanwoo Choi <cw00.choi@samsung.com> --- drivers/devfreq/governor_passive.c | 20 +++++++++++++++----- 1 file changed, 15 insertions(+), 5 deletions(-)
diff --git a/drivers/devfreq/governor_passive.c b/drivers/devfreq/governor_passive.c index 58308948b863..24ce94c80f06 100644 --- a/drivers/devfreq/governor_passive.c +++ b/drivers/devfreq/governor_passive.c @@ -19,7 +19,7 @@ static int devfreq_passive_get_target_freq(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; + struct dev_pm_opp *opp = NULL, *p_opp = NULL; int i, count, ret = 0; /* @@ -56,13 +56,20 @@ static int devfreq_passive_get_target_freq(struct devfreq *devfreq, * list of parent device. Because in this case, *freq is temporary * value which is decided by ondemand governor. */ - opp = devfreq_recommended_opp(parent_devfreq->dev.parent, freq, 0); - if (IS_ERR(opp)) { - ret = PTR_ERR(opp); + p_opp = devfreq_recommended_opp(parent_devfreq->dev.parent, freq, 0); + if (IS_ERR(p_opp)) { + ret = PTR_ERR(p_opp); goto out; } - dev_pm_opp_put(opp); + if (devfreq->opp_table && parent_devfreq->opp_table) + opp = dev_pm_opp_xlate_opp(parent_devfreq->opp_table, + devfreq->opp_table, p_opp); + if (opp) { + *freq = dev_pm_opp_get_freq(opp); + dev_pm_opp_put(opp); + goto out; + } /* * Get the OPP table's index of decided freqeuncy by governor @@ -89,6 +96,9 @@ static int devfreq_passive_get_target_freq(struct devfreq *devfreq, *freq = child_freq; out: + if (!IS_ERR_OR_NULL(opp)) + dev_pm_opp_put(p_opp); + return ret; } -- 2.22.0.510.g264f2c817a-goog
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