Request for support opensource optee contribution guide line

Dear Sir,

I would like to know that, if I want submit any patch for optee opensource features, could please guide me what are the guide line I have to follow it. Below are some information require .

1. What is the maximum patch size shall I submit? 2. What are the code guide line I have to follow it? 3. What are mail chain I have to include for patch review purpose? 4. Is there any open source link for post quarry ?

Regards, Raghu