From: Sudeep Holla <sudeep.holla@arm.com>
Date: Fri, 31 Jan 2025 14:18:22 +0000 (+0000)
Subject: firmware: arm_scmi: Emit modalias for SCMI devices
X-Git-Tag: v6.15-rc1~158^2~15^2
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=d069c33f5ce2fe8f13489ba396080fcf28c10f60;p=thirdparty%2Fkernel%2Flinux.git

firmware: arm_scmi: Emit modalias for SCMI devices

In order to enable libkmod lookups for SCMI device objects to their
corresponding module, add 'modalias' to the base attribute of SCMI
devices.

Message-Id: <20250131141822.514342-3-sudeep.holla@arm.com>
Signed-off-by: Sudeep Holla <sudeep.holla@arm.com>
---

diff --git a/drivers/firmware/arm_scmi/bus.c b/drivers/firmware/arm_scmi/bus.c
index 862dd34eca624..7af01664ce7e2 100644
--- a/drivers/firmware/arm_scmi/bus.c
+++ b/drivers/firmware/arm_scmi/bus.c
@@ -287,6 +287,17 @@ static int scmi_device_uevent(const struct device *dev, struct kobj_uevent_env *
 			      scmi_dev->name);
 }
 
+static ssize_t modalias_show(struct device *dev,
+			     struct device_attribute *attr, char *buf)
+{
+	struct scmi_device *scmi_dev = to_scmi_dev(dev);
+
+	return sysfs_emit(buf, SCMI_UEVENT_MODALIAS_FMT,
+			  dev_name(&scmi_dev->dev), scmi_dev->protocol_id,
+			  scmi_dev->name);
+}
+static DEVICE_ATTR_RO(modalias);
+
 static ssize_t protocol_id_show(struct device *dev,
 				 struct device_attribute *attr, char *buf)
 {
@@ -308,6 +319,7 @@ static DEVICE_ATTR_RO(name);
 static struct attribute *scmi_device_attributes_attrs[] = {
 	&dev_attr_protocol_id.attr,
 	&dev_attr_name.attr,
+	&dev_attr_modalias.attr,
 	NULL,
 };
 ATTRIBUTE_GROUPS(scmi_device_attributes);