tifm: add sysfs attribute for tifm devices

A sysfs attribute reflecting current media type is added.

Signed-off-by: Alex Dubov <oakad@yahoo.com>
Signed-off-by: Pierre Ossman <drzeus@drzeus.cx>

1 files changed, 20 insertions, 7 deletions

diff --git a/drivers/misc/tifm_core.c b/drivers/misc/tifm_core.c
index 1e591989835d..70220beb3e04 100644
--- a/drivers/misc/tifm_core.c
+++ b/drivers/misc/tifm_core.c
@@ -142,14 +142,27 @@ static int tifm_device_resume(struct device *dev)
 
 #endif /* CONFIG_PM */
 
+static ssize_t type_show(struct device *dev, struct device_attribute *attr,
+                         char *buf)
+{
+        struct tifm_dev *sock = container_of(dev, struct tifm_dev, dev);
+        return sprintf(buf, "%x", sock->type);
+}
+
+static struct device_attribute tifm_dev_attrs[] = {
+        __ATTR(type, S_IRUGO, type_show, NULL),
+        __ATTR_NULL
+};
+
 static struct bus_type tifm_bus_type = {
-        .name    = "tifm",
-        .match   = tifm_bus_match,
-        .uevent  = tifm_uevent,
-        .probe   = tifm_device_probe,
-        .remove  = tifm_device_remove,
-        .suspend = tifm_device_suspend,
-        .resume  = tifm_device_resume
+        .name           = "tifm",
+        .dev_attrs      = tifm_dev_attrs,
+        .match          = tifm_bus_match,
+        .uevent         = tifm_uevent,
+        .probe          = tifm_device_probe,
+        .remove         = tifm_device_remove,
+        .suspend        = tifm_device_suspend,
+        .resume         = tifm_device_resume
 };
 
 static void tifm_free(struct class_device *cdev)