pmdomain: rockchip: Simplify with scoped for each OF child loop

Use scoped for_each_available_child_of_node_scoped() and
for_each_child_of_node_scoped() when iterating over
device nodes to make code a bit simpler.

Signed-off-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
Reviewed-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
Link: https://lore.kernel.org/r/20240823-cleanup-h-guard-pm-domain-v1-1-8320722eaf39@linaro.org
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>

Author: krzk

drivers/pmdomain/rockchip/pm-domains.c

@@ -804,43 +804,42 @@ static void rockchip_configure_pd_cnt(struct rockchip_pmu *pmu,
 static int rockchip_pm_add_subdomain(struct rockchip_pmu *pmu,
 				     struct device_node *parent)
 {
-	struct device_node *np;
 	struct generic_pm_domain *child_domain, *parent_domain;
 	int error;
 
-	for_each_child_of_node(parent, np) {
+	for_each_child_of_node_scoped(parent, np) {
 		u32 idx;
 
 		error = of_property_read_u32(parent, "reg", &idx);
 		if (error) {
 			dev_err(pmu->dev,
 				"%pOFn: failed to retrieve domain id (reg): %d\n",
 				parent, error);
-			goto err_out;
+			return error;
 		}
 		parent_domain = pmu->genpd_data.domains[idx];
 
 		error = rockchip_pm_add_one_domain(pmu, np);
 		if (error) {
 			dev_err(pmu->dev, "failed to handle node %pOFn: %d\n",
 				np, error);
-			goto err_out;
+			return error;
 		}
 
 		error = of_property_read_u32(np, "reg", &idx);
 		if (error) {
 			dev_err(pmu->dev,
 				"%pOFn: failed to retrieve domain id (reg): %d\n",
 				np, error);
-			goto err_out;
+			return error;
 		}
 		child_domain = pmu->genpd_data.domains[idx];
 
 		error = pm_genpd_add_subdomain(parent_domain, child_domain);
 		if (error) {
 			dev_err(pmu->dev, "%s failed to add subdomain %s: %d\n",
 				parent_domain->name, child_domain->name, error);
-			goto err_out;
+			return error;
 		} else {
 			dev_dbg(pmu->dev, "%s add subdomain: %s\n",
 				parent_domain->name, child_domain->name);
@@ -850,17 +849,12 @@ static int rockchip_pm_add_subdomain(struct rockchip_pmu *pmu,
 	}
 
 	return 0;
-
-err_out:
-	of_node_put(np);
-	return error;
 }
 
 static int rockchip_pm_domain_probe(struct platform_device *pdev)
 {
 	struct device *dev = &pdev->dev;
 	struct device_node *np = dev->of_node;
-	struct device_node *node;
 	struct device *parent;
 	struct rockchip_pmu *pmu;
 	const struct rockchip_pmu_info *pmu_info;
@@ -918,20 +912,18 @@ static int rockchip_pm_domain_probe(struct platform_device *pdev)
 	 */
 	mutex_lock(&dmc_pmu_mutex);
 
-	for_each_available_child_of_node(np, node) {
+	for_each_available_child_of_node_scoped(np, node) {
 		error = rockchip_pm_add_one_domain(pmu, node);
 		if (error) {
 			dev_err(dev, "failed to handle node %pOFn: %d\n",
 				node, error);
-			of_node_put(node);
 			goto err_out;
 		}
 
 		error = rockchip_pm_add_subdomain(pmu, node);
 		if (error < 0) {
 			dev_err(dev, "failed to handle subdomain node %pOFn: %d\n",
 				node, error);
-			of_node_put(node);
 			goto err_out;
 		}
 	}