BCM2835 datasheet clearly documents register structure and access to the device. I have not found similar document published by Bradcom for BCM2837 , but would assume it allows similar manipulations of internal registers.
Not being familiar with actual implementation of "canned" GPIO functions - YES there are numerous function each and every GPIO port can have, not limited to "canned" configuration,
can someone point me in the direction of Raspberry load process and actual code implementation of these function(s) ?
Since some on this forum have hard time interpreting my QUESTIONS, here is a different verbage for same - where is the "Open source" code for implementing such functions, and I not need "in github" (duh) as an answer.
I like to have, if possible to save me time looking, the real source file where such function is executed. But if it is not of common knowledge of some designer here, I'll just keep looking. Bonus question - why do my post DO NOT format the way I wrote them?