Add support for the GPIO controller employed by Realtek in multiple series of MIPS SoCs. These include the supported RTL838x and RTL839x series. The register layout also matches the one found in GPIO controllers 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 (RTL8380M), and Zyxel GS1900-48 (RTL8393M). Furthermore, the GPIO ports and interrupt controller have been tested on a Netgear GS110TPPv1 (RTL8381M). 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 | 320 ++++++++++++++++++ 4 files changed, 413 insertions(+) create mode 100644 Documentation/devicetree/bindings/gpio/gpio-realtek-otto.yaml create mode 100644 drivers/gpio/gpio-realtek-otto.c -- 2.30.2
