workflow: add litex_fomu to ci

This adds fomu and litex and fomu to build on ci.  It requires downloading
a riscv toolchain.

Signed-off-by: Sean Cross <sean@xobs.io>

.github/workflows/build.yml

@@ -167,6 +167,7 @@ jobs:
         - "feather_nrf52840_express"
         - "feather_radiofruit_zigbee"
         - "feather_stm32f405_express"
+        - "fomu"
         - "gemma_m0"
         - "grandcentral_m4_express"
         - "hallowing_m0_express"
@@ -254,10 +255,13 @@ jobs:
         pip install requests sh click setuptools awscli
         wget https://adafruit-circuit-python.s3.amazonaws.com/gcc-arm-none-eabi-9-2019-q4-major-x86_64-linux.tar.bz2
         sudo tar -C /usr --strip-components=1 -xaf gcc-arm-none-eabi-9-2019-q4-major-x86_64-linux.tar.bz2
+        wget https://static.dev.sifive.com/dev-tools/riscv64-unknown-elf-gcc-8.3.0-2019.08.0-x86_64-linux-centos6.tar.gz
+        sudo tar -C /usr --strip-components=1 -xaf riscv64-unknown-elf-gcc-8.3.0-2019.08.0-x86_64-linux-centos6.tar.gz
     - name: Versions
       run: |
         gcc --version
         arm-none-eabi-gcc --version
+        riscv64-unknown-elf-gcc --version
         python3 --version
     - uses: actions/checkout@v1
       with:

tools/build_board_info.py

@@ -12,7 +12,7 @@ from sh.contrib import git
 sys.path.append("adabot")
 import adabot.github_requests as github
 
-SUPPORTED_PORTS = ["nrf", "atmel-samd", "stm", "cxd56", "mimxrt10xx"]
+SUPPORTED_PORTS = ["nrf", "atmel-samd", "stm", "cxd56", "mimxrt10xx", "litex"]
 
 BIN = ('bin',)
 UF2 = ('uf2',)
@@ -32,6 +32,7 @@ extension_by_port = {
     "stm": BIN,
     "cxd56": SPK,
     "mimxrt10xx": HEX_UF2,
+    "litex": BIN,
 }
 
 # Per board overrides