[PATCH 08/23] driver core: platform: provide platform_device_set_of_node_from_dev()

[Bartosz Golaszewski <bartosz.golaszewski@oss.qualcomm.com>]

Provide a platform-specific variant of device_set_of_node_from_dev(). In
addition to bumping the reference count of the OF node being assigned,
it also assigns the fwnode of the platform device.

Signed-off-by: Bartosz Golaszewski <bartosz.golaszewski@oss.qualcomm.com>
---
 drivers/base/platform.c         | 16 ++++++++++++++++
 include/linux/platform_device.h |  2 ++
 2 files changed, 18 insertions(+)

diff --git a/drivers/base/platform.c b/drivers/base/platform.c
index 449914e657c9c58cbf030208e60583dde728d6c0..b14f707f077bcc535fff9484d1ec904616d0a1d1 100644
--- a/drivers/base/platform.c
+++ b/drivers/base/platform.c
@@ -730,6 +730,22 @@ void platform_device_set_fwnode(struct platform_device *pdev,
 }
 EXPORT_SYMBOL_GPL(platform_device_set_fwnode);
 
+/**
+ * platform_device_set_of_node_from_dev - reuse OF node of another device
+ * @pdev: platform device to set the node for
+ * @dev2: device whose OF node to reuse
+ *
+ * Reuses the OF node of another device in this platform device while
+ * internally keeping track of reference counting.
+ */
+void platform_device_set_of_node_from_dev(struct platform_device *pdev,
+					  const struct device *dev2)
+{
+	device_set_of_node_from_dev(&pdev->dev, dev2);
+	pdev->dev.fwnode = of_fwnode_handle(pdev->dev.of_node);
+}
+EXPORT_SYMBOL_GPL(platform_device_set_of_node_from_dev);
+
 /**
  * platform_device_add - add a platform device to device hierarchy
  * @pdev: platform device we're adding
diff --git a/include/linux/platform_device.h b/include/linux/platform_device.h
index a915a6f2da71284b60a6595dfeb013ca0dba542e..e5ca686f23998a3182a9573a7d1e84c6a6fcdafb 100644
--- a/include/linux/platform_device.h
+++ b/include/linux/platform_device.h
@@ -268,6 +268,8 @@ void platform_device_set_of_node(struct platform_device *pdev,
 				 struct device_node *np);
 void platform_device_set_fwnode(struct platform_device *pdev,
 				struct fwnode_handle *fwnode);
+void platform_device_set_of_node_from_dev(struct platform_device *pdev,
+					  const struct device *dev2);
 extern int platform_device_add(struct platform_device *pdev);
 extern void platform_device_del(struct platform_device *pdev);
 extern void platform_device_put(struct platform_device *pdev);

-- 
2.47.3