This is ported this from Broadcom's XLDK. There seem to be 3 different
IP blocks for 3 separate banks of GPIOs in the iProc chips.

I've dropped everything except support for the Chip Common A GPIO
controller because the other blocks actually seem to be supportable with
other drivers. The driver itself is halfway between pinctrl-nsp-gpio.c
and pinctrl-iproc-gpio.c.

Chris Packham (2):
  dt-bindings: gpio: brcm: Add bindings for xgs-iproc
  gpio: Add xgs-iproc driver

 .../bindings/gpio/brcm,xgs-iproc.txt          |  41 ++
 drivers/gpio/Kconfig                          |   9 +
 drivers/gpio/Makefile                         |   1 +
 drivers/gpio/gpio-xgs-iproc.c                 | 422 ++++++++++++++++++
 4 files changed, 473 insertions(+)
 create mode 100644 Documentation/devicetree/bindings/gpio/brcm,xgs-iproc.txt
 create mode 100644 drivers/gpio/gpio-xgs-iproc.c

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2.23.0