[PATCH V1 0/2] Add virtual controller for gpio configuration

[Harish Jenny K N <harish_kandiga@xxxxxxxxxx>]

The purpose of this patchset is to provide a new virtual
gpio controller to configure the polarity of the gpio pins
used by the userspace. When there is no kernel driver using
the gpio pin, it becomes necessary for the userspace
to configure the polarity of the gpio pin.
This driver enables the userspace to directly use the gpio pin
without worrying about the hardware level polarity configuration.
Polarity configuration will be done by the virtual gpio controller
based on device tree information.

This is created after the discussion in the thread
"gpio: set active-state of GPIO lines using device tree"
https://www.spinics.net/lists/linux-gpio/msg38829.html
to model inverters in the device tree to describe the hardware.

Thanks,
Harish.

Harish Jenny K N (2):
  gpio: inverter: Add virtual controller for gpio configuration
  gpio: inverter: document the inverter bindings

 .../devicetree/bindings/gpio/gpio-inverter.txt     |  30 +++++
 drivers/gpio/Kconfig                               |   9 ++
 drivers/gpio/Makefile                              |   1 +
 drivers/gpio/gpio-inverter.c                       | 144 +++++++++++++++++++++
 4 files changed, 184 insertions(+)
 create mode 100644 Documentation/devicetree/bindings/gpio/gpio-inverter.txt
 create mode 100644 drivers/gpio/gpio-inverter.c

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2.7.4