First hacks for buffered read
Signed-off-by: Andrew 'Necromant' Andrianov <andrew@ncrmnt.org>
Restore spi data rate to max, minor performance tuning

Signed-off-by: Andrew 'Necromant' Andrianov <andrew@ncrmnt.org>
First working refactored code

Signed-off-by: Andrew 'Necromant' Andrianov <andrew@ncrmnt.org>