Commit 22779149 authored by Sudeep Holla's avatar Sudeep Holla
Browse files

firmware: arm_ffa: Emit modalias for FF-A devices 



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

Tested-by: default avatarAbdellatif El Khlifi <abdellatif.elkhlifi@arm.com>
Link: https://lore.kernel.org/r/20231005175640.379631-1-sudeep.holla@arm.com


Signed-off-by: default avatarSudeep Holla <sudeep.holla@arm.com>
parent 2d698e8b

drivers/firmware/arm_ffa/bus.c

+14 −1
Original line number Diff line number Diff line
@@ -15,6 +15,8 @@ 


#include "common.h"



#define SCMI_UEVENT_MODALIAS_FMT	"arm_ffa:%04x:%pUb"



static DEFINE_IDA(ffa_bus_id);



static int ffa_device_match(struct device *dev, struct device_driver *drv)
@@ -63,10 +65,20 @@ static int ffa_device_uevent(const struct device *dev, struct kobj_uevent_env *e 
{

	const struct ffa_device *ffa_dev = to_ffa_dev(dev);



	return add_uevent_var(env, "MODALIAS=arm_ffa:%04x:%pUb",

	return add_uevent_var(env, "MODALIAS=" SCMI_UEVENT_MODALIAS_FMT,

			      ffa_dev->vm_id, &ffa_dev->uuid);

}



static ssize_t modalias_show(struct device *dev,

			     struct device_attribute *attr, char *buf)

{

	struct ffa_device *ffa_dev = to_ffa_dev(dev);



	return sysfs_emit(buf, SCMI_UEVENT_MODALIAS_FMT, ffa_dev->vm_id,

			  &ffa_dev->uuid);

}

static DEVICE_ATTR_RO(modalias);



static ssize_t partition_id_show(struct device *dev,

				 struct device_attribute *attr, char *buf)

{
@@ -88,6 +100,7 @@ static DEVICE_ATTR_RO(uuid); 
static struct attribute *ffa_device_attributes_attrs[] = {

	&dev_attr_partition_id.attr,

	&dev_attr_uuid.attr,

	&dev_attr_modalias.attr,

	NULL,

};

ATTRIBUTE_GROUPS(ffa_device_attributes);