Kernel drivers and IOCTLs

Hi, I'm working on a driver that would verify a Linux or U-Boot image is secure and I need to pass parameters such as the public key, starting address, etc. I'd heard in talking to developers that IOCTLs are frowned upon. I also found this article that seems to indicate that using sysfs or proc is a better way to go. https://www.linuxjournal.com/article/8110 but then I see this article from 2013 which is more recent than the article. https://www.kernel.org/doc/html/latest/process/botching-up-ioctls.html So are IOCTLs discouraged or not? Thanks, TW