I'm continuing my effort to port a large project to the latest SDK, and I've found that the SAI driver is missing entirely from the MK22FN1M0AVLH12 SDK package. It's there for the MK21, but it's not an option for the MK22. I'll copy it over, but this really makes me wonder what the package management system is for if everything has to be done manually anyway.
Other discoveries for this morning include: FTM driver has no option to enable the channel DMA flag. FTM driver can set the modulo value, but the example inexplicably accesses the register directly and doesn't even use the SDK. The clock gating controls (e.g., CLOCK_EnableClock) aren't documented at all. There's no function to flush the UART FIFO.