media: dvb-frontends/stv0910: field and register access helpers

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Add a write_field() function that acts as helper to update specific bits
specified in the field defines (FSTV0910_*) in stv0910_regs.h, which was
recently updated to carry the missing offset values. With that, add the
SET_FIELD(), SET_REG() and GET_REG() macros that wrap the write_field(),
write_reg() and read_reg() functions to allow for making all demod
access code cleaner.

The write_field() function is annotated with __maybe_unused temporarily
to silence eventual compile warnings.

Picked up from the dddvb upstream, with the macro names made uppercase
so they are distinguishable as such.

Cc: Ralph Metzler <rjkm@metzlerbros.de>
Signed-off-by: Daniel Scheller <d.scheller@gmx.net>
Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>

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Daniel Scheller 2017-12-26 18:37:58 -05:00 • committed by Mauro Carvalho Chehab

parent 8042e98c38

commit bdd7682b16

1 changed files with 28 additions and 0 deletions

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drivers/media/dvb-frontends/stv0910.c

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