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[v2,0/2] Add Realtek Otto GPIO support

Message ID 20210315190806.66762-1-sander@svanheule.net
Headers show
Series Add Realtek Otto GPIO support | expand

Message

Sander Vanheule March 15, 2021, 7:08 p.m. UTC 
Add support for the GPIO controller employed by Realtek in multiple series of
MIPS SoCs. These include the supported RTL838x and RTL839x. The register layout
also matches the one found in the GPIO controller of other (Lexra-based) SoCs
such as RTL8196E, RTL8197D, and RTL8197F.

For the platform name 'otto', I am not aware of any official resources as to
what hardware this specifically applies to. However, in all of the GPL archives
we've received, from vendors using compatible SoCs in their design, the
platform under the MIPS architecture is referred to by this name.

The GPIO ports have been tested on a Zyxel GS1900-8 (RTL8380), and Zyxel
GS1900-48 (RTL8393). Furthermore, the GPIO ports and interrupt controller have
been tested on a Netgear GS110TPPv1 (RTL8381).

Changes in v2:
- Clarify structure and usage of IMR registers

Sander Vanheule (2):
  dt-bindings: gpio: Binding for Realtek Otto GPIO
  gpio: Add Realtek Otto GPIO support

 .../bindings/gpio/gpio-realtek-otto.yaml      |  80 +++++
 drivers/gpio/Kconfig                          |  12 +
 drivers/gpio/Makefile                         |   1 +
 drivers/gpio/gpio-realtek-otto.c              | 331 ++++++++++++++++++
 4 files changed, 424 insertions(+)
 create mode 100644 Documentation/devicetree/bindings/gpio/gpio-realtek-otto.yaml
 create mode 100644 drivers/gpio/gpio-realtek-otto.c