[v4,0/2] gpio: add generic gpio input multiplexer

Hello all!

I changed my email setup because there were serious issues with it
previously and patches were not delivered to people. Hopefully it's working
now. Because of that I am sending updated patches in v4, which consist of
the same functionality as in v3 added with cosmetic changes to Kconfig and
updated author email address.

Drew gave acked and tested-by tags in [1] so I took the liberty to include
them in the patches.

For convenience I am including also rangediff between v3 and v4 below.

Thanks,
Mauri

[1] https://www.spinics.net/lists/linux-gpio/msg61277.html

1:  1ca26bb53ab6 ! 1:  496558967cd8 dt-bindings: gpio-mux-input: add documentation
    @@
      ## Metadata ##
    -Author: Mauri Sandberg <sandberg@mailfence.com>
    +Author: Mauri Sandberg <maukka@ext.kapsi.fi>
     
      ## Commit message ##
         dt-bindings: gpio-mux-input: add documentation
     
         Add documentation for a general GPIO multiplexer.
     
    -    Signed-off-by: Mauri Sandberg <sandberg@mailfence.com>
    +    Signed-off-by: Mauri Sandberg <maukka@ext.kapsi.fi>
    +    Tested-by: Drew Fustini <drew@beagleboard.org>
    +    Reviewed-by: Drew Fustini <drew@beagleboard.org>
         ---
    +    v3 -> v4:
    +     - Changed author email
    +     - Included Tested-by and Reviewed-by from Drew
         v2 -> v3: added a complete example on dual 4-way multiplexer
         v1 -> v2: added a little bit more text in the binding documenation
     
    @@ Documentation/devicetree/bindings/gpio/gpio-mux-input.yaml (new)
     +title: Generic GPIO input multiplexer
     +
     +maintainers:
    -+  - Mauri Sandberg <sandberg@mailfence.com>
    ++  - Mauri Sandberg <maukka@ext.kapsi.fi>
     +
     +description: |
     +  A generic GPIO based input multiplexer
2:  dcd76ada9d34 ! 2:  782e009ba54b gpio: gpio-mux-input: add generic gpio input multiplexer
    @@
      ## Metadata ##
    -Author: Mauri Sandberg <sandberg@mailfence.com>
    +Author: Mauri Sandberg <maukka@ext.kapsi.fi>
     
      ## Commit message ##
         gpio: gpio-mux-input: add generic gpio input multiplexer
    @@ Commit message
         pin.
     
         Reported-by: kernel test robot <lkp@intel.com>
    -    Signed-off-by: Mauri Sandberg <sandberg@mailfence.com>
    +    Signed-off-by: Mauri Sandberg <maukka@ext.kapsi.fi>
    +    Tested-by: Drew Fustini <drew@beagleboard.org>
    +    Reviewed-by: Drew Fustini <drew@beagleboard.org>
         ---
    +    v3 -> v4:
    +     - Changed author email
    +     - Included Tested-by and Reviewed-by from Drew
         v2 -> v3:
          - use managed device resources
          - update Kconfig description
    @@ drivers/gpio/Kconfig: config GPIO_MOCKUP
     +	help
     +	  Say yes here to enable support for generic GPIO input multiplexer.
     +
    -+  	  This driver uses a mux-controller to drive the multiplexer and has a
    -+  	  single output pin for reading the inputs to the mux. The driver can be
    -+  	  used in situations when GPIO pins are used to select what multiplexer
    -+  	  pin should be used for reading input and the output pin of the
    -+  	  multiplexer is connected to a GPIO input pin.
    ++	  This driver uses a mux-controller to drive the multiplexer and has a
    ++	  single output pin for reading the inputs to the mux. The driver can
    ++	  be used in situations when GPIO pins are used to select what
    ++	  multiplexer pin should be used for reading input and the output pin
    ++	  of the multiplexer is connected to a GPIO input pin.
     +
      endif
     
    @@ drivers/gpio/gpio-mux-input.c (new)
     +/*
     + *  A generic GPIO input multiplexer driver
     + *
    -+ *  Copyright (C) 2021 Mauri Sandberg <sandberg@mailfence.com>
    ++ *  Copyright (C) 2021 Mauri Sandberg <maukka@ext.kapsi.fi>
     + *
     + */
     +
    @@ drivers/gpio/gpio-mux-input.c (new)
     +};
     +module_platform_driver(gpio_mux_input_driver);
     +
    -+MODULE_AUTHOR("Mauri Sandberg <sandberg@mailfence.com>");
    ++MODULE_AUTHOR("Mauri Sandberg <maukka@ext.kapsi.fi>");
     +MODULE_DESCRIPTION("Generic GPIO input multiplexer");
     +MODULE_LICENSE("GPL");

Mauri Sandberg (2):
  dt-bindings: gpio-mux-input: add documentation
  gpio: gpio-mux-input: add generic gpio input multiplexer

 .../bindings/gpio/gpio-mux-input.yaml         |  75 +++++++++++
 drivers/gpio/Kconfig                          |  16 +++
 drivers/gpio/Makefile                         |   1 +
 drivers/gpio/gpio-mux-input.c                 | 124 ++++++++++++++++++
 4 files changed, 216 insertions(+)
 create mode 100644 Documentation/devicetree/bindings/gpio/gpio-mux-input.yaml
 create mode 100644 drivers/gpio/gpio-mux-input.c


base-commit: c354c29524eeabba63da51f30a09b85ec9dc853a