corrections after running on hardware

timeout can be disabled (timeout reg value 0)

Signed-off-by: Marek Czerski <ma.czerski@gmail.com>
added refrence documents

Signed-off-by: Marek Czerski <ma.czerski@gmail.com>
fixes after unaligned access to registers commit

Signed-off-by: Marek Czerski <ma.czerski@gmail.com>