Possible Sysfs for led class drivers

Hi, I have scanned through some of the led sysfs interfaces of my hardware boards inside the /sys/class/leds and found these brightness, max_brightness trigger uevent invert sata I want to know can we add our own custom sysfs interface ? Does there exists a default list of interfaces provided by the led class subsystem? like brightness, max_brightness,trigger,uevent ,etc?? Thanks in advance ! Rgds Rp