But maybe we could support such cases by the helpers?

I CC'd Yangtao Li.

For example we could do this:

diff --git a/drivers/opp/core.c b/drivers/opp/core.c
index ca8c6acc29f4..e2eb0f9cf46c 100644
--- a/drivers/opp/core.c
+++ b/drivers/opp/core.c

@@ -1771,7 +1771,8 @@ static void devm_pm_opp_supported_hw_release(void *data)
 
 /**
  * devm_pm_opp_set_supported_hw() - Set supported platforms
- * @dev: Device for which supported-hw has to be set.
+ * @dev: Device which manages allocated resources.
+ * @opp_dev: Device for which supported-hw has to be set.
  * @versions: Array of hierarchy of versions to match.
  * @count: Number of elements in the array.
  *

@@ -1783,13 +1784,14 @@ static void devm_pm_opp_supported_hw_release(void *data)
  * The opp_table structure will be freed after the device is destroyed.
  */
 struct opp_table *devm_pm_opp_set_supported_hw(struct device *dev,
+					       struct device *opp_dev,
 					       const u32 *versions,
 					       unsigned int count)
 {
 	struct opp_table *opp_table;
 	int err;
 
-	opp_table = dev_pm_opp_set_supported_hw(dev, versions, count);
+	opp_table = dev_pm_opp_set_supported_hw(opp_dev, versions, count);
 	if (IS_ERR(opp_table))
 		return opp_table;