A problem with init-only drivers


The library-based approach looks best for hsw2020
We build-test everything, so nothing rusts away
We may change API (e.g. gpio_setup()) and fix it all

We pick a driver in the final binary only if we need it
e.g., the SPI driver is built not not used but for a demo

Initcalls are collected and executed only when needed
usleep_init is only there if we actually run usleep
We don't turn-on the GPIO block unless we use it

However, we have a problem with init-only drivers
We are not pulling-in them by actual use
One of them is the PLL initialization
The other is TMR32B1 that runs our jiffies variable