[PATCH v2] regulator: as3722: use the platform OF node setter

[Yige Jiang <yigejiang86@gmail.com>]

as3722_get_regulator_dt_data() gets the regulators child node and
assigns it only to dev.of_node. Platform device release now puts
dev.fwnode, leaving the acquired node reference unreleased.

Use platform_device_set_of_node() to synchronize both fields and
give the device its own reference. Use __free(device_node) to release
the local lookup reference when the function returns. This keeps
the node valid for regulator matching and the platform device
lifetime, while also replacing the previous device-owned reference
on a probe retry.

Fixes: 7b5b51b2b05c ("driver core: platform: count references to all kinds of firmware nodes")
Signed-off-by: Yige Jiang <yigejiang86@gmail.com>
---
Changes in v2:
- Use __free(device_node) for the local lookup reference, as suggested
  by Bartosz Golaszewski, instead of an explicit of_node_put().
- Remove the Assisted-by trailer; keep the disclosure below.

Based on linux-next next-20261102 (2637bdec0535).
Compile-tested: arm64, GCC 14.2.0, W=1, CONFIG_OF_DYNAMIC=y.
COMPILE_TEST=y.
Baseline and v2 target objects built from this exact base.
No full kernel/module-link, hardware or runtime test was performed.
AI assistance was used for analysis and patch preparation.

The earlier dangling-node fix is already present in this base.

 drivers/regulator/as3722-regulator.c | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/drivers/regulator/as3722-regulator.c b/drivers/regulator/as3722-regulator.c
index 85e2aaa1a06b..ffcefd72316a 100644
--- a/drivers/regulator/as3722-regulator.c
+++ b/drivers/regulator/as3722-regulator.c
@@ -585,18 +585,18 @@
 static int as3722_get_regulator_dt_data(struct platform_device *pdev,
 		struct as3722_regulators *as3722_regs)
 {
-	struct device_node *np;
 	struct as3722_regulator_config_data *reg_config;
 	u32 prop;
 	int id;
 	int ret;
 
-	np = of_get_child_by_name(pdev->dev.parent->of_node, "regulators");
+	struct device_node *np __free(device_node) =
+		of_get_child_by_name(pdev->dev.parent->of_node, "regulators");
 	if (!np) {
 		dev_err(&pdev->dev, "Device is not having regulators node\n");
 		return -ENODEV;
 	}
-	pdev->dev.of_node = np;
+	platform_device_set_of_node(pdev, np);
 
 	ret = of_regulator_match(&pdev->dev, np, as3722_regulator_matches,
 			ARRAY_SIZE(as3722_regulator_matches));

base-commit: 2637bdec0535a2044cd830eba9a79363651d9043