[PATCH v3 04/20] driver core: platform: provide platform_device_set_of_node_from_dev()
From: Bartosz Golaszewski <hidden>
Date: 2026-07-06 12:45:10
Also in:
dri-devel, driver-core, imx, intel-xe, linux-arm-msm, linux-devicetree, linux-i2c, linux-iommu, linux-mips, linux-pm, linux-sound, linux-usb, lkml, netdev, platform-driver-x86
Subsystem:
driver core, kobjects, debugfs and sysfs, the rest · Maintainers:
Greg Kroah-Hartman, "Rafael J. Wysocki", Danilo Krummrich, Linus Torvalds
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. Reviewed-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com> Signed-off-by: Bartosz Golaszewski <redacted> --- 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 6520b70cf3052d683a2ecb1a0dd7227575546ba0..f24a5f406746b53ca9eaab9472f6dd1345e04ad6 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 f037e4101c41dfdbf628d013348d7149ac519721..5333237ec58f30aecb05a3e160c7704fa07a0490 100644
--- a/include/linux/platform_device.h
+++ b/include/linux/platform_device.h@@ -269,6 +269,8 @@ 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);
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2.47.3