2 files changed, 13 insertions, 4 deletions

diff --git a/Documentation/ABI/testing/sysfs-driver-hid-roccat-koneplus b/Documentation/ABI/testing/sysfs-driver-hid-roccat-koneplus
index 65e6e5dd67e8..f9e2a61900e5 100644
--- a/Documentation/ABI/testing/sysfs-driver-hid-roccat-koneplus
+++ b/Documentation/ABI/testing/sysfs-driver-hid-roccat-koneplus
@@ -104,9 +104,9 @@ What:		/sys/bus/usb/devices/<busnum>-<devnum>:<config num>.<interface num>/<hid-
 Date:           October 2010
 Contact:        Stefan Achatz <erazor_de@users.sourceforge.net>
 Description:    When written a calibration process for the tracking control unit
-                can be initiated/cancelled.
-                The data has to be 3 bytes long.
-                This file is writeonly.
+                can be initiated/cancelled. Also lets one read/write sensor
+                registers.
+                The data has to be 4 bytes long.
 Users:          http://roccat.sourceforge.net
 
 What:           /sys/bus/usb/devices/<busnum>-<devnum>:<config num>.<interface num>/<hid-bus>:<vendor-id>:<product-id>.<num>/koneplus/roccatkoneplus<minor>/tcu_image
diff --git a/drivers/hid/hid-roccat-koneplus.c b/drivers/hid/hid-roccat-koneplus.c
index f5602fec4865..c47540a5d4f3 100644
--- a/drivers/hid/hid-roccat-koneplus.c
+++ b/drivers/hid/hid-roccat-koneplus.c
@@ -222,6 +222,14 @@ static ssize_t koneplus_sysfs_write_tcu(struct file *fp,
                         sizeof(struct koneplus_tcu), KONEPLUS_COMMAND_TCU);
 }
 
+static ssize_t koneplus_sysfs_read_tcu(struct file *fp,
+                struct kobject *kobj, struct bin_attribute *attr, char *buf,
+                loff_t off, size_t count)
+{
+        return koneplus_sysfs_read(fp, kobj, buf, off, count,
+                        sizeof(struct koneplus_tcu), KONEPLUS_COMMAND_TCU);
+}
+
 static ssize_t koneplus_sysfs_read_tcu_image(struct file *fp,
                 struct kobject *kobj, struct bin_attribute *attr, char *buf,
                 loff_t off, size_t count)
@@ -426,8 +434,9 @@ static struct bin_attribute koneplus_bin_attributes[] = {
                 .write = koneplus_sysfs_write_sensor
         },
         {
-                .attr = { .name = "tcu", .mode = 0220 },
+                .attr = { .name = "tcu", .mode = 0660 },
                 .size = sizeof(struct koneplus_tcu),
+                .read = koneplus_sysfs_read_tcu,
                 .write = koneplus_sysfs_write_tcu
         },
         {