HID: roccat: add sysfs attr "reset" for Isku

Isku needs an extra sysfs attr to support device reset.
Signed-off-by: Stefan Achatz <erazor_de@users.sourceforge.net>
Signed-off-by: Jiri Kosina <jkosina@suse.cz>

Documentation/ABI/testing/sysfs-driver-hid-roccat-isku

@@ -117,6 +117,14 @@ Description:	When written, this file lets one store macros with max 500
 		which profile and key to read.
 Users:		http://roccat.sourceforge.net
 
+What:		/sys/bus/usb/devices/<busnum>-<devnum>:<config num>.<interface num>/<hid-bus>:<vendor-id>:<product-id>.<num>/isku/roccatisku<minor>/reset
+Date:		November 2012
+Contact:	Stefan Achatz <erazor_de@users.sourceforge.net>
+Description:	When written, this file lets one reset the device.
+		The data has to be 3 bytes long.
+		This file is writeonly.
+Users:		http://roccat.sourceforge.net
+
 What:		/sys/bus/usb/devices/<busnum>-<devnum>:<config num>.<interface num>/<hid-bus>:<vendor-id>:<product-id>.<num>/isku/roccatisku<minor>/control
 Date:		June 2011
 Contact:	Stefan Achatz <erazor_de@users.sourceforge.net>

drivers/hid/hid-roccat-isku.c

@@ -218,6 +218,7 @@ ISKU_SYSFS_RW(last_set, LAST_SET)
 ISKU_SYSFS_W(talk, TALK)
 ISKU_SYSFS_R(info, INFO)
 ISKU_SYSFS_W(control, CONTROL)
+ISKU_SYSFS_W(reset, RESET)
 
 static struct bin_attribute isku_bin_attributes[] = {
 	ISKU_BIN_ATTR_RW(macro, MACRO),
@@ -233,6 +234,7 @@ static struct bin_attribute isku_bin_attributes[] = {
 	ISKU_BIN_ATTR_W(talk, TALK),
 	ISKU_BIN_ATTR_R(info, INFO),
 	ISKU_BIN_ATTR_W(control, CONTROL),
+	ISKU_BIN_ATTR_W(reset, RESET),
 	__ATTR_NULL
 };
 

drivers/hid/hid-roccat-isku.h

@@ -27,6 +27,7 @@ enum {
 	ISKU_SIZE_LAST_SET = 0x14,
 	ISKU_SIZE_LIGHT = 0x0a,
 	ISKU_SIZE_MACRO = 0x823,
+	ISKU_SIZE_RESET = 0x03,
 	ISKU_SIZE_TALK = 0x10,
 };
 
@@ -53,6 +54,7 @@ enum isku_commands {
 	ISKU_COMMAND_MACRO = 0xe,
 	ISKU_COMMAND_INFO = 0xf,
 	ISKU_COMMAND_LIGHT = 0x10,
+	ISKU_COMMAND_RESET = 0x11,
 	ISKU_COMMAND_KEYS_CAPSLOCK = 0x13,
 	ISKU_COMMAND_LAST_SET = 0x14,
 	ISKU_COMMAND_15 = 0x15,