-KERNEL=="auer[0-9]*", NAME="usb/%k"
-KERNEL=="hw_random", NAME="hwrng"
-KERNEL=="mmtimer", MODE="0644"
-KERNEL=="rflash[0-9]*", MODE="0400"
-KERNEL=="rrom[0-9]*", MODE="0400"
-KERNEL=="sxctl", NAME="specialix_sxctl"
-KERNEL=="rioctl", NAME="specialix_rioctl"
-KERNEL=="iowarrior[0-9]*", NAME="usb/%k"
-KERNEL=="hiddev[0-9]*", NAME="usb/%k"
-KERNEL=="legousbtower[0-9]*", NAME="usb/%k"
-KERNEL=="dabusb[0-9]*", NAME="usb/%k"
-KERNEL=="usbdpfp[0-9]*", NAME="usb/%k"
-KERNEL=="cpad[0-9]*", NAME="usb/%k"
-
-# do not delete static device nodes
-ACTION=="remove", NAME=="?*", TEST=="/lib/udev/devices/$name", OPTIONS+="ignore_remove"
-ACTION=="remove", NAME=="", TEST=="/lib/udev/devices/%k", OPTIONS+="ignore_remove"
+KERNEL=="mmtimer", MODE="0644"
+KERNEL=="rflash[0-9]*", MODE="0400"
+KERNEL=="rrom[0-9]*", MODE="0400"
+
+SUBSYSTEM=="firmware", ACTION=="add", IMPORT{builtin}="firmware"