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firmware: arm_scmi: Add name and protocol id attributes

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Add the name and the protocol id attributes to the SCMI devices on the
bus so that they are exposed to the user-space via the sysfs.

Message-Id: <20250131141822.514342-2-sudeep.holla@arm.com>
Reviewed-by: Dhruva Gole <d-gole@ti.com>
Signed-off-by: Sudeep Holla <sudeep.holla@arm.com>
This commit is contained in:
Sudeep Holla
2025-01-31 14:18:21 +00:00
parent 21ee965267
commit feaea74fd6
1 changed files with 38 additions and 0 deletions
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38
drivers/firmware/arm_scmi/bus.c
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@@ -17,6 +17,8 @@
#include "common.h"
#define SCMI_UEVENT_MODALIAS_FMT "%s:%02x:%s"
BLOCKING_NOTIFIER_HEAD(scmi_requested_devices_nh);
EXPORT_SYMBOL_GPL(scmi_requested_devices_nh);
@@ -276,11 +278,47 @@ static void scmi_dev_remove(struct device *dev)
scmi_drv->remove(scmi_dev);
}
static int scmi_device_uevent(const struct device *dev, struct kobj_uevent_env *env)
{
const struct scmi_device *scmi_dev = to_scmi_dev(dev);
return add_uevent_var(env, "MODALIAS=" SCMI_UEVENT_MODALIAS_FMT,
dev_name(&scmi_dev->dev), scmi_dev->protocol_id,
scmi_dev->name);
}
static ssize_t protocol_id_show(struct device *dev,
struct device_attribute *attr, char *buf)
{
struct scmi_device *scmi_dev = to_scmi_dev(dev);
return sprintf(buf, "0x%02x\n", scmi_dev->protocol_id);
}
static DEVICE_ATTR_RO(protocol_id);
static ssize_t name_show(struct device *dev, struct device_attribute *attr,
char *buf)
{
struct scmi_device *scmi_dev = to_scmi_dev(dev);
return sprintf(buf, "%s\n", scmi_dev->name);
}
static DEVICE_ATTR_RO(name);
static struct attribute *scmi_device_attributes_attrs[] = {
&dev_attr_protocol_id.attr,
&dev_attr_name.attr,
NULL,
};
ATTRIBUTE_GROUPS(scmi_device_attributes);
const struct bus_type scmi_bus_type = {
.name = "scmi_protocol",
.match = scmi_dev_match,
.probe = scmi_dev_probe,
.remove = scmi_dev_remove,
.uevent = scmi_device_uevent,
.dev_groups = scmi_device_attributes_groups,
};
EXPORT_SYMBOL_GPL(scmi_bus_type);