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path: root/drivers/devfreq/devfreq.c
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Diffstat (limited to 'drivers/devfreq/devfreq.c')
-rw-r--r--drivers/devfreq/devfreq.c46
1 files changed, 35 insertions, 11 deletions
diff --git a/drivers/devfreq/devfreq.c b/drivers/devfreq/devfreq.c
index 071b59fe84d2..d4424b5d8306 100644
--- a/drivers/devfreq/devfreq.c
+++ b/drivers/devfreq/devfreq.c
@@ -984,6 +984,32 @@ EXPORT_SYMBOL(devm_devfreq_add_device);
#ifdef CONFIG_OF
/*
+ * devfreq_get_devfreq_by_node - Get the devfreq device from devicetree
+ * @node - pointer to device_node
+ *
+ * return the instance of devfreq device
+ */
+struct devfreq *devfreq_get_devfreq_by_node(struct device_node *node)
+{
+ struct devfreq *devfreq;
+
+ if (!node)
+ return ERR_PTR(-EINVAL);
+
+ mutex_lock(&devfreq_list_lock);
+ list_for_each_entry(devfreq, &devfreq_list, node) {
+ if (devfreq->dev.parent
+ && devfreq->dev.parent->of_node == node) {
+ mutex_unlock(&devfreq_list_lock);
+ return devfreq;
+ }
+ }
+ mutex_unlock(&devfreq_list_lock);
+
+ return ERR_PTR(-ENODEV);
+}
+
+/*
* devfreq_get_devfreq_by_phandle - Get the devfreq device from devicetree
* @dev - instance to the given device
* @index - index into list of devfreq
@@ -1005,26 +1031,24 @@ struct devfreq *devfreq_get_devfreq_by_phandle(struct device *dev, int index)
if (!node)
return ERR_PTR(-ENODEV);
- mutex_lock(&devfreq_list_lock);
- list_for_each_entry(devfreq, &devfreq_list, node) {
- if (devfreq->dev.parent
- && devfreq->dev.parent->of_node == node) {
- mutex_unlock(&devfreq_list_lock);
- of_node_put(node);
- return devfreq;
- }
- }
- mutex_unlock(&devfreq_list_lock);
+ devfreq = devfreq_get_devfreq_by_node(node);
of_node_put(node);
- return ERR_PTR(-EPROBE_DEFER);
+ return devfreq;
}
+
#else
+struct devfreq *devfreq_get_devfreq_by_node(struct device_node *node)
+{
+ return ERR_PTR(-ENODEV);
+}
+
struct devfreq *devfreq_get_devfreq_by_phandle(struct device *dev, int index)
{
return ERR_PTR(-ENODEV);
}
#endif /* CONFIG_OF */
+EXPORT_SYMBOL_GPL(devfreq_get_devfreq_by_node);
EXPORT_SYMBOL_GPL(devfreq_get_devfreq_by_phandle);
/**