linux-kernel - [PATCH v3 05/14] software node: Add software_node_device

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Message-Id: <20260110-pci-m2-e-v3-5-4faee7d0d5ae@oss.qualcomm.com>
Date: Sat, 10 Jan 2026 12:26:23 +0530
From: Manivannan Sadhasivam via B4 Relay <devnull+manivannan.sadhasivam.oss.qualcomm.com@...nel.org>
To: Rob Herring <robh@...nel.org>, 
 Greg Kroah-Hartman <gregkh@...uxfoundation.org>, 
 Jiri Slaby <jirislaby@...nel.org>, Nathan Chancellor <nathan@...nel.org>, 
 Nicolas Schier <nicolas.schier@...ux.dev>, Hans de Goede <hansg@...nel.org>, 
 Ilpo Järvinen <ilpo.jarvinen@...ux.intel.com>, 
 Mark Pearson <mpearson-lenovo@...ebb.ca>, 
 "Derek J. Clark" <derekjohn.clark@...il.com>, 
 Manivannan Sadhasivam <mani@...nel.org>, 
 Krzysztof Kozlowski <krzk+dt@...nel.org>, 
 Conor Dooley <conor+dt@...nel.org>, Marcel Holtmann <marcel@...tmann.org>, 
 Luiz Augusto von Dentz <luiz.dentz@...il.com>, 
 Bartosz Golaszewski <brgl@...ev.pl>, 
 Andy Shevchenko <andriy.shevchenko@...ux.intel.com>, 
 Daniel Scally <djrscally@...il.com>, 
 Heikki Krogerus <heikki.krogerus@...ux.intel.com>, 
 Sakari Ailus <sakari.ailus@...ux.intel.com>, 
 "Rafael J. Wysocki" <rafael@...nel.org>, Danilo Krummrich <dakr@...nel.org>, 
 Bartosz Golaszewski <brgl@...nel.org>
Cc: linux-serial@...r.kernel.org, linux-kernel@...r.kernel.org, 
 linux-kbuild@...r.kernel.org, platform-driver-x86@...r.kernel.org, 
 linux-pci@...r.kernel.org, devicetree@...r.kernel.org, 
 linux-arm-msm@...r.kernel.org, linux-bluetooth@...r.kernel.org, 
 linux-pm@...r.kernel.org, Stephan Gerhold <stephan.gerhold@...aro.org>, 
 Dmitry Baryshkov <dmitry.baryshkov@....qualcomm.com>, 
 linux-acpi@...r.kernel.org, 
 Manivannan Sadhasivam <manivannan.sadhasivam@....qualcomm.com>
Subject: [PATCH v3 05/14] software node: Add software_node_device_uevent()
 API

From: Manivannan Sadhasivam <manivannan.sadhasivam@....qualcomm.com>

Add software_node_device_uevent() API to return the uevent variable for
swnode using the DT compatible property. The uevent will have the DT prefix
of "of:N*T*C" to match the DT's module device table.

Signed-off-by: Manivannan Sadhasivam <manivannan.sadhasivam@....qualcomm.com>
---
 drivers/base/swnode.c    | 13 +++++++++++++
 include/linux/property.h |  1 +
 2 files changed, 14 insertions(+)

diff --git a/drivers/base/swnode.c b/drivers/base/swnode.c
index 4a3b367dea02..c33e09300e5f 100644
--- a/drivers/base/swnode.c
+++ b/drivers/base/swnode.c
@@ -388,6 +388,19 @@ bool software_node_match_device(struct device *dev, const struct device_driver *
 }
 EXPORT_SYMBOL_GPL(software_node_match_device);

+int software_node_device_uevent(const struct device *dev, struct kobj_uevent_env *env)
+{
+	const char *compatible;
+	int ret;
+
+	ret = device_property_read_string(dev, "compatible", &compatible);
+	if (ret)
+		return ret;
+
+	return add_uevent_var(env, "MODALIAS=of:N*T*C%s", compatible);
+}
+EXPORT_SYMBOL_GPL(software_node_device_uevent);
+
 /* -------------------------------------------------------------------------- */
 /* fwnode operations */

diff --git a/include/linux/property.h b/include/linux/property.h
index 7fe75ab732f6..14f85fd66bfc 100644
--- a/include/linux/property.h
+++ b/include/linux/property.h
@@ -599,6 +599,7 @@ int software_node_register(const struct software_node *node);
 void software_node_unregister(const struct software_node *node);

 bool software_node_match_device(struct device *dev, const struct device_driver *drv);
+int software_node_device_uevent(const struct device *dev, struct kobj_uevent_env *env);

 struct fwnode_handle *
 fwnode_create_software_node(const struct property_entry *properties,

-- 
2.48.1