TODO

 1TODO:
 2- checkpatch.pl fixes
 3  These checks should be ignored:
 4    CHECK:ALLOC_SIZEOF_STRUCT: Prefer kmalloc(sizeof(*board->private_data)...) over kmalloc(sizeof(struct xxx_priv)...)
 5    ./gpio/gpib_bitbang.c:50: ERROR:COMPLEX_MACRO: Macros with complex values should be enclosed in parenthese
 6  This warning will be addressed later:  WARNING:UNDOCUMENTED_DT_STRING: DT compatible string
 7- resolve XXX notes where possible
 8- fix FIXME notes
 9- clean-up commented-out code
10- fix typos