From 8877c06885ce43780f7630973dc47cd3a625524b Mon Sep 17 00:00:00 2001 From: Bartosz Golaszewski Date: Mon, 6 Jul 2026 14:44:15 +0200 Subject: [PATCH] driver core: platform: provide platform_device_set_fwnode() Provide a helper function encapsulating the logic of assigning firmware nodes to platform devices created with platform_device_alloc(). Make the kerneldoc state that this is the proper interface for assigning firmware nodes to dynamically allocated platform devices. This will allow us to switch to counting the references of the device's firmware nodes in the future, not only the OF nodes. Reviewed-by: Andy Shevchenko Signed-off-by: Bartosz Golaszewski Link: https://patch.msgid.link/20260706-pdev-fwnode-ref-v3-3-1ff028e33779@oss.qualcomm.com Signed-off-by: Greg Kroah-Hartman --- drivers/base/platform.c | 19 +++++++++++++++++++ include/linux/platform_device.h | 3 +++ 2 files changed, 22 insertions(+) diff --git a/drivers/base/platform.c b/drivers/base/platform.c index 3188d5aba5f9..6520b70cf305 100644 --- a/drivers/base/platform.c +++ b/drivers/base/platform.c @@ -711,6 +711,25 @@ void platform_device_set_of_node(struct platform_device *pdev, } EXPORT_SYMBOL_GPL(platform_device_set_of_node); +/** + * platform_device_set_fwnode - assign a firmware node to device + * @pdev: platform device to set the node for + * @fwnode: new firmware node + * + * Assign a firmware node to this platform device. Internally keep track of the + * reference count. Devices created with platform_device_alloc() must use this + * function instead of assigning the node manually. + */ +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; +} +EXPORT_SYMBOL_GPL(platform_device_set_fwnode); + /** * 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 870d168aeff8..c463d46b7b9a 100644 --- a/include/linux/platform_device.h +++ b/include/linux/platform_device.h @@ -20,6 +20,7 @@ struct mfd_cell; struct property_entry; struct platform_device_id; struct device_node; +struct fwnode_handle; struct platform_device { const char *name; @@ -265,6 +266,8 @@ extern int platform_device_add_data(struct platform_device *pdev, const void *data, size_t size); 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); 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);