On Mon, 24 May 2021 00:34:01 +0200, Sander Vanheule wrote:

Add a binding description for the Realtek RTL8231, a GPIO and LED
expander chip commonly used in ethernet switches based on a Realtek
switch SoC. These chips can be addressed via an MDIO or SMI bus, or used
as a plain 36-bit shift register.

This binding only describes the feature set provided by the MDIO/SMI
configuration, and covers the GPIO, PWM, and pin control properties. The
LED properties are defined in a separate binding.

Signed-off-by: Sander Vanheule <sander@svanheule.net>
---
 .../bindings/mfd/realtek,rtl8231.yaml         | 190 ++++++++++++++++++
 1 file changed, 190 insertions(+)
 create mode 100644 Documentation/devicetree/bindings/mfd/realtek,rtl8231.yaml

Reviewed-by: Rob Herring <robh@kernel.org>