Hi, I have an FPGA-based system controller connected over I2C to SoC running Linux. It currently exposes only one function (besides purely information things like sw version): selecting the boot source (via a register that takes effect after reboot). However in the future it will probably handle more functionalities like peripherals reset controller and interrupt controller. I'm wondering how I should approach this? My initial thought was that I could put the driver in the mfd that would load sub drivers but since it only has currently one functionality does it even make sense? The other thing is - how should I approach handling boot source selection? The simplest solution is by providing appropriate sysfs entries (e.g. syscon_bootsrc), allowing me to write the next boot source, but I'm wondering if there is any similar driver that I could reuse? I thought about reboot-mode but as the name suggests it's rather about mode (bootloader, recovery) selection than boot source selection. Thanks for guidance, Patryk