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>

diff --git a/Documentation/ABI/testing/sysfs-bus-mei b/Documentation/ABI/testing/sysfs-bus-mei
index 91967a7..20e4d16 100644 (file)
--- a/Documentation/ABI/testing/sysfs-bus-mei
+++ b/Documentation/ABI/testing/sysfs-bus-mei
@@ -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

diff --git a/drivers/misc/mei/bus.c b/drivers/misc/mei/bus.c
index 17b00ba..e76d94a 100644 (file)
--- a/drivers/misc/mei/bus.c
+++ b/drivers/misc/mei/bus.c
@@ -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;