The elf_parser library now generates a dot file with device dependencies
that can be later rendered using Graphviz. Each node in the diagram
contains the device label (taken from DT node). In some cases the label
property can be None, leading to build failures like:
```
line 273, in device_dependency_graph
text = '{:s}\\nOrdinal: {:d} | Handle: {:d}\\n{:s}'.format(
TypeError: unsupported format string passed to NoneType.__format__
```
This patch switches to node name instead, which will always be set to
some value. This value is actually what devices get now as a name if
they do not have a label set.
Signed-off-by: Gerard Marull-Paretas <gerard.marull@nordicsemi.no>
If a device manually specifies that it depends on a second DT device,
add the first device to the second devices list of supported devices.
Signed-off-by: Jordan Yates <jordan.yates@data61.csiro.au>
Output the final dependency graph as a `.dot` file, which when rendered
by graphviz can be easier to comprehend than the text descriptions.
This output is optional in that it will not be generated if `graphviz`
is not installed.
Signed-off-by: Jordan Yates <jordan.yates@data61.csiro.au>
Adds a python module intended to simplify other scripts that need to
work with device information compiled into the first pass `.elf` file.
Scripts utilizing this module can focus on iterating over dependency
graphs to generate the desired output, instead of also needing to
extract and build the graphs in the first place.
Signed-off-by: Jordan Yates <jordan.yates@data61.csiro.au>
