Which document can I refer to understand the Pin Control definitions in the device tree : hikey-pinctrl.dtsi - arch/arm64/boot/dts/hisilicon/hikey-pinctrl.dtsi - Linux source code (v5.15.12) - Bootlin 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?