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mei: bus: add name and uuid into device attributes 

Export name and uuid via sysfs and uevent

Cc: linux-api@vger.kernel.org
Signed-off-by: Tomas Winkler <tomas.winkler@intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Tomas Winkler 2015-05-07 15:54:03 +03:00 committed by Greg Kroah-Hartman
parent c93b76b34b
commit 007d64eb22
2 changed files with 47 additions and 0 deletions
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14
Documentation/ABI/testing/sysfs-bus-mei
View File

@ -5,3 +5,17 @@ Contact: Samuel Ortiz <sameo@linux.intel.com>
linux-mei@linux.intel.com
Description: Stores the same MODALIAS value emitted by uevent
Format: mei:<mei device name>:<device uuid>:
What: /sys/bus/mei/devices/.../name
Date: May 2015
KernelVersion: 4.2
Contact: Tomas Winkler <tomas.winkler@intel.com>
Description: Stores mei client device name
Format: string
What: /sys/bus/mei/devices/.../uuid
Date: May 2015
KernelVersion: 4.2
Contact: Tomas Winkler <tomas.winkler@intel.com>
Description: Stores mei client device uuid
Format: xxxxxxxx-xxxx-xxxx-xxxx-xxxxxxxxxxxx

33
drivers/misc/mei/bus.c
View File

@ -114,6 +114,31 @@ static int mei_cl_device_remove(struct device *dev)
return driver->remove(device);
}
static ssize_t name_show(struct device *dev, struct device_attribute *a,
char *buf)
{
struct mei_cl_device *device = to_mei_cl_device(dev);
size_t len;
len = snprintf(buf, PAGE_SIZE, "%s", device->name);
return (len >= PAGE_SIZE) ? (PAGE_SIZE - 1) : len;
}
static DEVICE_ATTR_RO(name);
static ssize_t uuid_show(struct device *dev, struct device_attribute *a,
char *buf)
{
struct mei_cl_device *device = to_mei_cl_device(dev);
const uuid_le *uuid = mei_me_cl_uuid(device->me_cl);
size_t len;
len = snprintf(buf, PAGE_SIZE, "%pUl", uuid);
return (len >= PAGE_SIZE) ? (PAGE_SIZE - 1) : len;
}
static DEVICE_ATTR_RO(uuid);
static ssize_t modalias_show(struct device *dev, struct device_attribute *a,
char *buf)
{
@ -129,6 +154,8 @@ static ssize_t modalias_show(struct device *dev, struct device_attribute *a,
static DEVICE_ATTR_RO(modalias);
static struct attribute *mei_cl_dev_attrs[] = {
&dev_attr_name.attr,
&dev_attr_uuid.attr,
&dev_attr_modalias.attr,
NULL,
};
@ -139,6 +166,12 @@ static int mei_cl_uevent(struct device *dev, struct kobj_uevent_env *env)
struct mei_cl_device *device = to_mei_cl_device(dev);
const uuid_le *uuid = mei_me_cl_uuid(device->me_cl);
if (add_uevent_var(env, "MEI_CL_UUID=%pUl", uuid))
return -ENOMEM;
if (add_uevent_var(env, "MEI_CL_NAME=%s", device->name))
return -ENOMEM;
if (add_uevent_var(env, "MODALIAS=mei:%s:" MEI_CL_UUID_FMT ":",
device->name, MEI_CL_UUID_ARGS(uuid->b)))
return -ENOMEM;