_M664
static DEVICE_ATTR(map_seg7 , _M664, show_map , store_map );
static DEVICE_ATTR(line1 , _M664, show_line1 , store_line1 );
static DEVICE_ATTR(line2 , _M664, show_line2 , store_line2 );
static DEVICE_ATTR(line3 , _M664, show_line3 , store_line3 );