[RFC,0/2] Add secondary master

Message

Vitor Soares Nov. 28, 2019, 1:15 a.m. UTC

As agreed I'm sharing with you my secondary master approach based on
[1] and [2]. It is not my goal to use this as alternative solution to
[1] and [2] but to provide you feedback about my challenges. Futher the
following patch should be considered as final work.

During proposal of [1] and [2] I was't able to compile the code directly and
dad need to adjust them to be able to compile dw-i3c-master and found that
they didn'd address my use case.

Apart of what already was done IMO:
  - We may have a secondary master struct to embbed master and slave rules.
  - Algorithm to define the way masters share bus ownership
  - Delay a tranfers when secondary master doesn't bus ownership.

[1] https://patchwork.kernel.org/patch/11011447/
[2] https://patchwork.kernel.org/patch/10846309/

Vitor Soares (2):
  i3c: Add prliminary support for secondary master
  i3c: dw: add preliminary support for sec master

 drivers/i3c/master.c               | 365 +++++++++++++++++++++-
 drivers/i3c/master/dw-i3c-master.c | 619 +++++++++++++++++++++++++++++++++----
 include/linux/i3c/master.h         |  39 +++
 3 files changed, 959 insertions(+), 64 deletions(-)