Better describe how to use tool options

[qwertyuiopzxcvbnmlkjhgfdsa1]

Could you please add description and usage, how to use this tool's options with examples?

• Regulators, how to get their names(from device dtsi/panel section?) like from "arch/arm64/boot/dts/qcom/"
• When to use option for backlight? How to distinguish if device has extra GPIO.
• dumb-dcs in what use cases to use it? Any problems it could cause?

And perhaps how to test it(how to compile on device and add it add module, and then "apk fix linux-postmarketos-*" ??). Thank you