Which document I can refer to understand the Hikey Pin Control definitions in device tree?

Which document can I refer to understand the Pin Control definitions in the device tree : https://elixir.bootlin.com/linux/latest/source/arch/arm64/boot/dts/hisilicon/hikey-pinctrl.dtsi for LeMaker Hikey 620?

Is there SoC document available on which these definitions are based?
I am new to device tree (know how device tree works at basic level) and hence trying to understand the pin control definitions by reading the device tree files for Hikey 620. I was curious on what data/document are these definitons based on?

Yeah, the pin control DT binding is not easy to understand for me as well :slight_smile: Usually, I will go back to read the doc: https://elixir.bootlin.com/linux/v5.2.2/source/Documentation/devicetree/bindings/pinctrl/pinctrl-single.txt

I think he means the specific values for hikey itself.

yes. I mean the specific values. Sorry in case was not clear.