Export name and uuid via sysfs and uevent
Cc: linux-api@xxxxxxxxxxxxxxx
Signed-off-by: Tomas Winkler <tomas.winkler@xxxxxxxxx>
---
Documentation/ABI/testing/sysfs-bus-mei | 14 ++++++++++++++
drivers/misc/mei/bus.c | 33 +++++++++++++++++++++++++++++++++
2 files changed, 47 insertions(+)
diff --git a/Documentation/ABI/testing/sysfs-bus-mei b/Documentation/ABI/testing/sysfs-bus-mei
index 91967a70313a..20e4d1638bac 100644
--- a/Documentation/ABI/testing/sysfs-bus-mei
+++ b/Documentation/ABI/testing/sysfs-bus-mei
@@ -5,3 +5,17 @@ Contact: Samuel Ortiz <sameo@xxxxxxxxxxxxxxx>
linux-mei@xxxxxxxxxxxxxxx
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@xxxxxxxxx>
+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@xxxxxxxxx>
+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 17b00baa53b1..e76d94aa6e12 100644
--- 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;
--
2.1.0
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