drm/gk20a: support for reclocking

Second version of the gk20a clock patches. I have tried to keep the therm and volt devices mandatory in the clock driver, but unfortunately they are too tied to bios to allow this, at least for the moment. Consequently this version is mostly a port of the first version to Ben's tree.

Ben, please let me know what I have done wrong in terms of integration to your tree, as the main purpose of writing patches against it instead of the kernel is to make your life easier. :)

Alexandre Courbot (3):
clk: make therm and volt devices optional
clk: support for non-BIOS pstates
gk20a: reclocking support

 drm/Kbuild                      |   1 +
 drm/core/os.h                   |   1 +
 drm/core/subdev/clock/gk20a.c   |   1 +
 drm/core/subdev/fb/ramgk20a.h   |   1 +
 drm/core/subdev/instmem/gk20a.c |   1 +
 lib/core/os.h                   |  10 +
 nvkm/engine/device/nve0.c       |   1 +
 nvkm/include/subdev/clock.h     |   9 +-
 nvkm/subdev/clock/Makefile.am   |   1 +
 nvkm/subdev/clock/base.c        |  52 ++--
 nvkm/subdev/clock/gk20a.c       | 665 ++++++++++++++++++++++++++++++++++++++++
 nvkm/subdev/clock/nv04.c        |   4 +-
 nvkm/subdev/clock/nv40.c        |   4 +-
 nvkm/subdev/clock/nv50.c        |   2 +-
 nvkm/subdev/clock/nva3.c        |   4 +-
 nvkm/subdev/clock/nvaa.c        |   4 +-
 nvkm/subdev/clock/nvc0.c        |   4 +-
 nvkm/subdev/clock/nve0.c        |   4 +-
 18 files changed, 735 insertions(+), 34 deletions(-)
 create mode 120000 drm/core/subdev/clock/gk20a.c
 create mode 120000 drm/core/subdev/fb/ramgk20a.h
 create mode 120000 drm/core/subdev/instmem/gk20a.c
 create mode 100644 nvkm/subdev/clock/gk20a.c

2.0.2