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authorViresh Kumar <viresh.kumar@linaro.org>2018-01-12 10:03:45 +0530
committerViresh Kumar <viresh.kumar@linaro.org>2018-05-09 10:15:19 +0530
commite2f4b5f8dc59c28605a320ea923905e519fd2ca7 (patch)
tree3cd38123affd84dd6b6f58a79e583cb98673a85a
parenta88bd2a51e901ed8081841d647157de8153df813 (diff)
downloadlinux-e2f4b5f8dc59c28605a320ea923905e519fd2ca7.tar.bz2
PM / OPP: Implement dev_pm_opp_get_of_node()
This adds a new helper to let the power domain drivers to access opp->np, so that they can read platform specific properties from the node. Signed-off-by: Jordan Crouse <jcrouse@codeaurora.org> Signed-off-by: Rajendra Nayak <rnayak@codeaurora.org> Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org> Reviewed-by: Ulf Hansson <ulf.hansson@linaro.org>
-rw-r--r--drivers/opp/of.c19
-rw-r--r--include/linux/pm_opp.h5
2 files changed, 24 insertions, 0 deletions
diff --git a/drivers/opp/of.c b/drivers/opp/of.c
index 6380ec3d695b..de41e68b780f 100644
--- a/drivers/opp/of.c
+++ b/drivers/opp/of.c
@@ -727,3 +727,22 @@ put_opp_table:
return opp;
}
EXPORT_SYMBOL_GPL(of_dev_pm_opp_find_required_opp);
+
+/**
+ * dev_pm_opp_get_of_node() - Gets the DT node corresponding to an opp
+ * @opp: opp for which DT node has to be returned for
+ *
+ * Return: DT node corresponding to the opp, else 0 on success.
+ *
+ * The caller needs to put the node with of_node_put() after using it.
+ */
+struct device_node *dev_pm_opp_get_of_node(struct dev_pm_opp *opp)
+{
+ if (IS_ERR_OR_NULL(opp)) {
+ pr_err("%s: Invalid parameters\n", __func__);
+ return NULL;
+ }
+
+ return of_node_get(opp->np);
+}
+EXPORT_SYMBOL_GPL(dev_pm_opp_get_of_node);
diff --git a/include/linux/pm_opp.h b/include/linux/pm_opp.h
index 70686f434c13..8fd34c4398b2 100644
--- a/include/linux/pm_opp.h
+++ b/include/linux/pm_opp.h
@@ -310,6 +310,7 @@ void dev_pm_opp_of_cpumask_remove_table(const struct cpumask *cpumask);
int dev_pm_opp_of_get_sharing_cpus(struct device *cpu_dev, struct cpumask *cpumask);
struct device_node *dev_pm_opp_of_get_opp_desc_node(struct device *dev);
struct dev_pm_opp *of_dev_pm_opp_find_required_opp(struct device *dev, struct device_node *np);
+struct device_node *dev_pm_opp_get_of_node(struct dev_pm_opp *opp);
#else
static inline int dev_pm_opp_of_add_table(struct device *dev)
{
@@ -348,6 +349,10 @@ static inline struct dev_pm_opp *of_dev_pm_opp_find_required_opp(struct device *
{
return NULL;
}
+static inline struct device_node *dev_pm_opp_get_of_node(struct dev_pm_opp *opp)
+{
+ return NULL;
+}
#endif
#endif /* __LINUX_OPP_H__ */