devicetree: better DT_PROP_BY_IDX()/DT_FOREACH_PROP_ELEM() support
Support use of these macros with properties of type phandle and
string by allowing iterating over:
- a phandle as if it were a phandles of length 1, for convenience and
consistency with our ability to take its length (and getting 1)
- the non-null characters in a string: we exclude the null for
consistency with the return value of DT_PROP_LEN() on string
properties, which, like strlen(), does not include the null
With this and a previous patch expanding the usage of DT_PROP_LEN(),
there is now a relationship between being able to take a property's
logical length with DT_PROP_LEN() and being able to iterate over its
logical elements with DT_FOREACH_PROP_ELEM(). Explain this in the
documentation.
Signed-off-by: Martí Bolívar <marti.bolivar@nordicsemi.no>
2 files changed
