I recently stumbled over the MagPi Essentials Camera. In chapter 7 "Flash photography using an LED" (p.41+), they show how to configure pin BCM17 to act as a flash for the official Raspberry Pi Camera. This totally works for me, but I usually don't take things for granted.
The device tree definition in
dt-blob.dts is full of magic strings like
FLASH_0_ENABLE that I cannot find anywhere in the git repository (except in binary form in the
Where can I find the definition or documentation to those strings? This is just out of curiosity if there are more unaccessible features lurking in the Pi that reveal the fact that it actually is based on a SoC intended for use in mobile phones.