confusion re: CPM2 and 8xxx

Robert P. J. Day rpjday at
Fri Jul 9 06:53:29 EST 2004

   there's some confusion (well, ok, just me) regarding kernel config
settings in the linuxppc-2.5 tree.  when i select a processor type, i
see that i have a number of choices, including


so far, so good.  so i select 8xx and, later, under

   Device drivers
     Character devices
       Serial drivers

   <*> CPM2 SCC/SMC serial port support
   [*] Support for console on CPM2 SCC/SMC serial port

according to the help on that first option:

     This driver supports the SCC and SMC serial ports on Motorola
     embedded PowerPC that contain a CPM2 (8xxx) or a CPM1 (8xx)

given that i explicitly selected 8xx, i don't think i should be
presented with any options related to an 8xxx platform (that is,
anything saying "CPM2").  yes, it's picky, but the first time i did
this, i sat there thinking, "i know CPM, but what the heck is this
CPM2 thing, and what does it have to do with an 8xx platform?"



p.s. it's also a bit misleading since there are no options whatever in
.config that contain the string "CPM2", in case you go grepping for

p.p.s.  more pedantry to follow.

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