Currently the generic driver is always unconditionally compiled. Fix
this by compiling it only when needed.
Signed-off-by: Carlo Caione <ccaione@baylibre.com>
Instead of putting object files inside libzephyr.a,
simply build a separate static library as most other
driver types are doing this already.
Signed-off-by: Daniel Leung <daniel.leung@intel.com>
A syscon device is a device managing a memory region containing a set of
registers that are not cohesive enough to represent as any specific type
of device. We need a driver for that because several other drivers could
use the same region at the same time and we need to io-map the region at
boot for MMU enabled platforms.
Signed-off-by: Carlo Caione <ccaione@baylibre.com>