Tidy up the "s626" driver a bit more. In particular, the handling of
encoder setup values is a bit hard to follow with lots of bit-shifting
and masking, particularly when converting between the "standardized"
setup values and the 'CRA' and 'CRB' register values. (There are 6
encoders in all, split between 3 pairs of encoders, 'A' and 'B', with
each pair controlled by a pair of 'CRA' and 'CRB' registers. The 'A'
encoder is mostly set-up by the 'CRA' register and the 'B' encoder is
mostly set-up by the 'CRB' register, but both registers are involved in
setting up each encoder.)
Also, avoid some confusion between the overall mode of the encoder
specified in the "standardized" setup value and the "counter source"
value in the hardware, expand the "index source" values in the
standardized setup value to cover all the hardware values to keep things
simple, and remove some macros that duplicate the values of other
macros.
01) staging: comedi: s626: clock polarity and direction are the same
02) staging: comedi: s626: specify bitshift for encoder A clock source
03) staging: comedi: s626: correct a comment in s626_get_mode_b()
04) staging: comedi: s626: distinguish counter src from encoder mode
05) staging: comedi: s626: correct S626_CRAMSK_CLKPOL_A macro (unused)
06) staging: comedi: s626: add missing bits for 'CRB' register
07) staging: comedi: s626: bitfield manipulation macros for CRA, CRB and
setup
08) staging: comedi: s626: make CRA and CRB setup conversions more
readable
09) staging: comedi: s626: expand standardized IndxSrc values
10) staging: comedi: s626: remove S626_BF_* macros
11) staging: comedi: s626: replace S626_MULT_X? values
drivers/staging/comedi/drivers/s626.c | 379 ++++++++++++++++------------------
drivers/staging/comedi/drivers/s626.h | 306 ++++++++++++++++++++-------
2 files changed, 416 insertions(+), 269 deletions(-)
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