[PATCH 00/12] Add support for Tegra DPAUX pinctrl

[Jon Hunter]

The Display Port Auxiliary (DPAUX) channel pads can be shared with an
internal I2C controller. Add pinctrl support for these pads so that the
I2C controller can request and use these pads.

This series has been tested with Thierry's patches for correcting the
parent clock for the DPAUX devices [0].

Please note that I have kept the patch that adds the pinctrl function,
pinconf_generic_dt_free_map(), in this series for completeness, although
Linus W has already picked this up (as it is not in -next AFAICT yet).

Changes from initial RFC:
- Dropped patches for adding sor-safe clocks to DPAUX in favour of the
  patches from Thierry [0].
- Split the DPAUX function to enable the DPAUX pads into two functions:
  one for turning on and one for turning off the pads.
- Updated the description for the 'i2c-bus' node based upon Mark R's
  feedback.
- Dropped the second test if the i2c-core when checking for the presence
  of the 'i2c-bus' node based upon Thierry's feedback.
- Removed depedency on CONFIG_PINCTRL in the DPAUX driver in favour of
  using #ifdef's per Thierry's feedback (note by removing the dependency
  on CONFIG_PINCTRL I had to use #ifdefs as all the structures, function
  tables, and functions may not be defined).
- Updated SOR power partition device-tree node to include all clocks and
  resets as described in the Tegra210 TRM.

[0] http://marc.info/?l=linux-tegra&m=146667915802019&w=2

Jon Hunter (12):
  soc/tegra: pmc: Initialise resets associated with a power partition
  drm/tegra: Clean-up if probing DPAUX fails
  drm/tegra: Add helper functions for setting up DPAUX pads
  dt-bindings: display: Update Tegra DPAUX documentation
  drm/tegra: Prepare DPAUX for supporting generic PM domains
  pinctrl: pinconf: Add generic helper function for freeing mappings
  dt-bindings: i2c: Add support for 'i2c-bus' subnode
  i2c: core: Add support for 'i2c-bus' subnode
  dt-bindings: Add bindings for Tegra DPAUX pinctrl driver
  drm/tegra: Add pinctrl support for DPAUX
  arm64: tegra: Add SOR power-domain node
  arm64: tegra: Add DPAUX pinctrl bindings

 .../display/tegra/nvidia,tegra20-host1x.txt        |  12 +-
 Documentation/devicetree/bindings/i2c/i2c.txt      |   8 +
 .../pinctrl/nvidia,tegra124-dpaux-padctl.txt       |  60 ++++++
 arch/arm64/boot/dts/nvidia/tegra210.dtsi           |  78 +++++++
 drivers/gpu/drm/tegra/dpaux.c                      | 239 +++++++++++++++++----
 drivers/i2c/i2c-core.c                             |  10 +-
 drivers/pinctrl/pinconf-generic.c                  |   8 +
 drivers/soc/tegra/pmc.c                            |  18 +-
 include/linux/pinctrl/pinconf-generic.h            |   2 +
 9 files changed, 383 insertions(+), 52 deletions(-)
 create mode 100644 Documentation/devicetree/bindings/pinctrl/nvidia,tegra124-dpaux-padctl.txt

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2.1.4