Claude review: driver core: platform: count references to all kinds of firmware nodes

[Claude Code Review Bot <claude-review@example.com>]

Patch Review

This is the payoff patch. Three key changes:

**Release function**:
```c
-	of_node_put(pa->pdev.dev.of_node);
+	fwnode_handle_put(pa->pdev.dev.fwnode);
```
Correct. For OF nodes, `fwnode_handle_put()` calls through to `of_node_put()` via the fwnode ops. For non-OF fwnodes, this now properly drops the reference that patch 23's updated helpers take.

**`platform_device_set_fwnode()` becomes the canonical implementation**:
```c
 void platform_device_set_fwnode(struct platform_device *pdev,
 				struct fwnode_handle *fwnode)
 {
-	if (is_of_node(fwnode))
-		platform_device_set_of_node(pdev, to_of_node(fwnode));
-	else
-		pdev->dev.fwnode = fwnode;
+	fwnode_handle_put(pdev->dev.fwnode);
+	pdev->dev.fwnode = fwnode_handle_get(fwnode);
+	pdev->dev.of_node = to_of_node(fwnode);
 }
```
Clean. Unified get/put for all fwnode types. `to_of_node()` returns NULL for non-OF fwnodes, correctly clearing `of_node`.

**`platform_device_set_of_node()` becomes a thin wrapper**:
```c
 void platform_device_set_of_node(struct platform_device *pdev,
 				 struct device_node *np)
 {
-	of_node_put(pdev->dev.of_node);
-	pdev->dev.of_node = of_node_get(np);
-	pdev->dev.fwnode = of_fwnode_handle(np);
+	platform_device_set_fwnode(pdev, of_fwnode_handle(np));
 }
```
Correct inversion of the delegation — `set_of_node` now calls `set_fwnode` instead of the reverse.

**`platform_device_register_full()`**:
```c
-	pdev->dev.fwnode = pdevinfo->fwnode;
-	pdev->dev.of_node = of_node_get(to_of_node(pdev->dev.fwnode));
+	pdev->dev.fwnode = fwnode_handle_get(pdevinfo->fwnode);
+	pdev->dev.of_node = to_of_node(pdev->dev.fwnode);
```
Correct. Takes a generic fwnode ref instead of only an OF ref. The `dev_assign_of_node_reused` call on the next line is not in the current tree — this needs a dependency note.

**Overall**: The refcounting is balanced. Every `fwnode_handle_get()` in the set functions is matched by the `fwnode_handle_put()` in `platform_device_release()`. The `platform_device_set_of_node_from_dev()` path works because for OF nodes, `of_node_get()` and `fwnode_handle_put()` operate on the same underlying refcount.

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Generated by Claude Code Patch Reviewer