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PM / OPP: Implement dev_pm_opp_get_of_node()

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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>
This commit is contained in:
Viresh Kumar 2018-01-12 10:03:45 +05:30
parent a88bd2a51e
commit e2f4b5f8dc
2 changed files with 24 additions and 0 deletions
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19
drivers/opp/of.c
View File

@ -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);

5
include/linux/pm_opp.h
View File

@ -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__ */