boards: mec15xxevb_assy6853: enable flashing with build command

This utilizes the newly introduced dediprog west flash runner to flash
the image onto the onboard SPI chip.

Signed-off-by: Daniel Leung <daniel.leung@intel.com>

boards/arm/mec15xxevb_assy6853/CMakeLists.txt

@@ -45,7 +45,7 @@ if(DEFINED EVERGLADES_SPI_GEN)
   set_property(GLOBAL APPEND PROPERTY extra_post_build_commands
     COMMAND ${EVERGLADES_SPI_GEN}
     -i ${EVERGLADES_SPI_CFG}
-    -o ${PROJECT_BINARY_DIR}/spi_image.bin
+    -o ${PROJECT_BINARY_DIR}/${SPI_IMAGE_NAME}
   )
 
   unset(EVERGLADES_SPI_GEN)

boards/arm/mec15xxevb_assy6853/board.cmake

@@ -0,0 +1,11 @@
+# SPDX-License-Identifier: Apache-2.0
+
+set(SPI_IMAGE_NAME spi_image.bin)
+
+board_set_flasher_ifnset(dediprog)
+
+# --vcc=0 - use 3.5V to flash
+board_finalize_runner_args(dediprog
+  "--spi-image=${PROJECT_BINARY_DIR}/${SPI_IMAGE_NAME}"
+  "--vcc=0"
+)

boards/arm/mec15xxevb_assy6853/doc/index.rst

@@ -274,6 +274,17 @@ Flashing
 
    .. note:: Remember that SPI MISO/MOSI are swapped on dediprog headers!
 
+   - Flash your board using west:
+
+     .. code-block:: console
+
+        $ west flash
+
+     Make sure that the program ``dpcmd`` (on Linux) or
+     ``dpcmd.exe`` (on Windows) can be found in your ``PATH``.
+     The Windows version is installed with your DediProg software.
+     The source code of the Linux version can be found at `SF100 Linux GitHub`_.
+
 #. Run your favorite terminal program to listen for output. Under Linux the
    terminal should be :code:`/dev/ttyACM0`. For example:
 
@@ -324,3 +335,5 @@ References
     https://github.com/MicrochipTech/CPGZephyrDocs/blob/master/MEC1501/SPI%20Dongles%20and%20Aardvark%20Interposer%20Assy%206791%20Rev%20A1p1%20-%20SCH.pdf
 .. _SPI Image Gen:
     https://github.com/MicrochipTech/CPGZephyrDocs/tree/master/MEC1501/SPI_image_gen
+.. _SF100 Linux GitHub:
+    https://github.com/DediProgSW/SF100Linux