Documentation for CHAR DDK

Hi,

In the serial port DDK → intr.c, there is a function called
set_attach_intr() to attach to an interrupt. Who is calling the detach
(ser_detach_intr) interrupt???

The most DDK’s are well documented but the CHAR DDK is not documented at
all. Can we expect documents for this DDK or will this be a DIY DDK?

TIA,
Freddy