Comments from upstream patch submission:

    Updated avrxmega3-v9.diff.bz2 with latest AVR8X devices.
    Rebased on .ATDF from latest Atmel.ATtiny_DFP.1.3.229.atpack

    The new parser addition does:

        Generates iotn*.h just from atdf schema.
        Parse only AVR8X family types (constrained in script).
        Adds few alieases (hardcoded) as older coding-style.
        Headers generated are functional the same as Atmel's 3.6.1.
        Parser license is BSD (the very avr-libc one).

    Add _PROTECTED_WRITE_SPM in xmega.h (as per Atmel's upstream 3.6.1).

    Backports changes from Atmel 3.6.1 [1] toolchain:
      - eedef.h
      - eewr_block_xmega.c
      - eewr_byte.S

    This patch adds support for avrxmega3 devices already supported by latest gcc8 compiler:

    attiny1614, attiny1616, attiny1617, attiny212, attiny214,
    attiny3214, attiny3216, attiny3217, attiny412, attiny414,
    attiny416, attiny417, attiny814, attiny816, attiny817 .

    New files:

      - attinny*.S are generated from latest Atmel.ATtiny_DFP.1.3.169.atpack.zip .xml (.atdf) files.
      - iotn*.h are from latest avr8-gnu-toolchain-osx-3.6.1.495-darwin.any.x86_64.tar.gz ( http://distribute.atmel.no/tools/opensource/Atmel-AVR-GNU-Toolchain/3.6.1/ ).
      - ChangeLog-2017

    Changed files:

      - include/avr/io.h
      - include/avr/Makefile.am
      - devtools/generate_iosym.sh
      - devtools/gen-avr-lib-tree.sh
      - avr-libc/configure.ac
      - ChangeLog

configure.ac

@@ -1128,6 +1128,84 @@ AM_CONDITIONAL(HAS_atxmega32e5, test "x$HAS_atxmega32e5" = "xyes")
 CHECK_AVR_DEVICE(avrxmega3)
 AM_CONDITIONAL(HAS_avrxmega3, test "x$HAS_avrxmega3" = "xyes")
 
+CHECK_AVR_DEVICE(attiny202)
+AM_CONDITIONAL(HAS_attiny202, test "x$HAS_attiny202" = "xyes")
+
+CHECK_AVR_DEVICE(attiny204)
+AM_CONDITIONAL(HAS_attiny204, test "x$HAS_attiny204" = "xyes")
+
+CHECK_AVR_DEVICE(attiny212)
+AM_CONDITIONAL(HAS_attiny212, test "x$HAS_attiny212" = "xyes")
+
+CHECK_AVR_DEVICE(attiny214)
+AM_CONDITIONAL(HAS_attiny214, test "x$HAS_attiny214" = "xyes")
+
+CHECK_AVR_DEVICE(attiny402)
+AM_CONDITIONAL(HAS_attiny402, test "x$HAS_attiny402" = "xyes")
+
+CHECK_AVR_DEVICE(attiny404)
+AM_CONDITIONAL(HAS_attiny404, test "x$HAS_attiny404" = "xyes")
+
+CHECK_AVR_DEVICE(attiny406)
+AM_CONDITIONAL(HAS_attiny406, test "x$HAS_attiny406" = "xyes")
+
+CHECK_AVR_DEVICE(attiny412)
+AM_CONDITIONAL(HAS_attiny412, test "x$HAS_attiny412" = "xyes")
+
+CHECK_AVR_DEVICE(attiny414)
+AM_CONDITIONAL(HAS_attiny414, test "x$HAS_attiny414" = "xyes")
+
+CHECK_AVR_DEVICE(attiny416)
+AM_CONDITIONAL(HAS_attiny416, test "x$HAS_attiny416" = "xyes")
+
+CHECK_AVR_DEVICE(attiny417)
+AM_CONDITIONAL(HAS_attiny417, test "x$HAS_attiny417" = "xyes")
+
+CHECK_AVR_DEVICE(attiny804)
+AM_CONDITIONAL(HAS_attiny804, test "x$HAS_attiny804" = "xyes")
+
+CHECK_AVR_DEVICE(attiny806)
+AM_CONDITIONAL(HAS_attiny806, test "x$HAS_attiny806" = "xyes")
+
+CHECK_AVR_DEVICE(attiny807)
+AM_CONDITIONAL(HAS_attiny807, test "x$HAS_attiny807" = "xyes")
+
+CHECK_AVR_DEVICE(attiny814)
+AM_CONDITIONAL(HAS_attiny814, test "x$HAS_attiny814" = "xyes")
+
+CHECK_AVR_DEVICE(attiny816)
+AM_CONDITIONAL(HAS_attiny816, test "x$HAS_attiny816" = "xyes")
+
+CHECK_AVR_DEVICE(attiny817)
+AM_CONDITIONAL(HAS_attiny817, test "x$HAS_attiny817" = "xyes")
+
+CHECK_AVR_DEVICE(attiny1604)
+AM_CONDITIONAL(HAS_attiny1604, test "x$HAS_attiny1604" = "xyes")
+
+CHECK_AVR_DEVICE(attiny1606)
+AM_CONDITIONAL(HAS_attiny1606, test "x$HAS_attiny1606" = "xyes")
+
+CHECK_AVR_DEVICE(attiny1607)
+AM_CONDITIONAL(HAS_attiny1607, test "x$HAS_attiny1607" = "xyes")
+
+CHECK_AVR_DEVICE(attiny1614)
+AM_CONDITIONAL(HAS_attiny1614, test "x$HAS_attiny1614" = "xyes")
+
+CHECK_AVR_DEVICE(attiny1616)
+AM_CONDITIONAL(HAS_attiny1616, test "x$HAS_attiny1616" = "xyes")
+
+CHECK_AVR_DEVICE(attiny1617)
+AM_CONDITIONAL(HAS_attiny1617, test "x$HAS_attiny1617" = "xyes")
+
+CHECK_AVR_DEVICE(attiny3214)
+AM_CONDITIONAL(HAS_attiny3214, test "x$HAS_attiny3214" = "xyes")
+
+CHECK_AVR_DEVICE(attiny3216)
+AM_CONDITIONAL(HAS_attiny3216, test "x$HAS_attiny3216" = "xyes")
+
+CHECK_AVR_DEVICE(attiny3217)
+AM_CONDITIONAL(HAS_attiny3217, test "x$HAS_attiny3217" = "xyes")
+
 
 # avrxmega4
 CHECK_AVR_DEVICE(avrxmega4)
@@ -1579,11 +1657,37 @@ AC_CONFIG_FILES([
 # avrxmega3
 AC_CONFIG_FILES([
 	avr/lib/avrxmega3/Makefile
+	avr/lib/avrxmega3/attiny1604/Makefile
+	avr/lib/avrxmega3/attiny1606/Makefile
+	avr/lib/avrxmega3/attiny1607/Makefile
+	avr/lib/avrxmega3/attiny1614/Makefile
+	avr/lib/avrxmega3/attiny1616/Makefile
+	avr/lib/avrxmega3/attiny1617/Makefile
+	avr/lib/avrxmega3/attiny3214/Makefile
+	avr/lib/avrxmega3/attiny3216/Makefile
+	avr/lib/avrxmega3/attiny3217/Makefile
 ])
 
 # avrxmega3/short-calls
 AC_CONFIG_FILES([
 	avr/lib/avrxmega3/short-calls/Makefile
+	avr/lib/avrxmega3/short-calls/attiny202/Makefile
+	avr/lib/avrxmega3/short-calls/attiny204/Makefile
+	avr/lib/avrxmega3/short-calls/attiny212/Makefile
+	avr/lib/avrxmega3/short-calls/attiny214/Makefile
+	avr/lib/avrxmega3/short-calls/attiny402/Makefile
+	avr/lib/avrxmega3/short-calls/attiny404/Makefile
+	avr/lib/avrxmega3/short-calls/attiny406/Makefile
+	avr/lib/avrxmega3/short-calls/attiny412/Makefile
+	avr/lib/avrxmega3/short-calls/attiny414/Makefile
+	avr/lib/avrxmega3/short-calls/attiny416/Makefile
+	avr/lib/avrxmega3/short-calls/attiny417/Makefile
+	avr/lib/avrxmega3/short-calls/attiny804/Makefile
+	avr/lib/avrxmega3/short-calls/attiny806/Makefile
+	avr/lib/avrxmega3/short-calls/attiny807/Makefile
+	avr/lib/avrxmega3/short-calls/attiny814/Makefile
+	avr/lib/avrxmega3/short-calls/attiny816/Makefile
+	avr/lib/avrxmega3/short-calls/attiny817/Makefile
 ])
 
 # avrxmega4