In P9, OCC(On Chip Controller) can be sent commands inband via shared memory based command response interface. This patch adds a platform driver to support the OCC command-response interface.
The skiboot patch for the interface is posted here: https://lists.ozlabs.org/pipermail/skiboot/2017-June/007705.html Shilpasri G Bhat (2): powerpc/powernv: Get a unique token for async completions powerpc/powernv : Add support for OPAL-OCC command/response interface arch/powerpc/include/asm/opal-api.h | 41 +++- arch/powerpc/include/asm/opal.h | 4 + arch/powerpc/platforms/powernv/Makefile | 2 +- arch/powerpc/platforms/powernv/opal-async.c | 46 ++++ arch/powerpc/platforms/powernv/opal-occ.c | 314 +++++++++++++++++++++++++ arch/powerpc/platforms/powernv/opal-wrappers.S | 1 + arch/powerpc/platforms/powernv/opal.c | 8 + 7 files changed, 414 insertions(+), 2 deletions(-) create mode 100644 arch/powerpc/platforms/powernv/opal-occ.c -- 1.8.3.1
