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OPP: Improve _find_table_of_opp_np()

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Make _find_table_of_opp_np() more efficient by using of_get_parent() to
find the parent OPP table node.

Tested-by: Rajendra Nayak <rnayak@codeaurora.org>
Reviewed-by: Ulf Hansson <ulf.hansson@linaro.org>
Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org>
This commit is contained in:
Viresh Kumar 2018-11-22 11:04:00 +05:30
parent 68de2fe57a
commit 699e21e417
1 changed files with 10 additions and 4 deletions
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14
drivers/opp/of.c
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@ -114,19 +114,25 @@ static struct device_node *of_parse_required_opp(struct device_node *np,
static struct opp_table *_find_table_of_opp_np(struct device_node *opp_np)
{
struct opp_table *opp_table;
struct dev_pm_opp *opp;
struct device_node *opp_table_np;
lockdep_assert_held(&opp_table_lock);
opp_table_np = of_get_parent(opp_np);
if (!opp_table_np)
goto err;
/* It is safe to put the node now as all we need now is its address */
of_node_put(opp_table_np);
list_for_each_entry(opp_table, &opp_tables, node) {
opp = _find_opp_of_np(opp_table, opp_np);
if (opp) {
dev_pm_opp_put(opp);
if (opp_table_np == opp_table->np) {
_get_opp_table_kref(opp_table);
return opp_table;
}
}
err:
return ERR_PTR(-ENODEV);
}