I have an RPi4 running Fedora 35. It hadn't been updated in a while, so I applied updates today. When I boot to the kernel 5.16.11-200, I lose the PPS device from my GPS hat. Boot back to 5.14.16-301.fc35 and it works. I'm booting with EFI firmware, and with a device tree config.txt that has "dtoverlay=pps-gpio,gpiopin=4" in it. I removed the /boot/dtb symlink and set /etc/u-boot.conf to not re-add it. When I boot 5.16, I see /proc/device-tree, and it has /proc/device-tree/pps@4 in it (and the contents look correct), but loading the pps-gpio kernel module just gives: pps-gpio: probe of pps@4 failed with error -22 -- Chris Adams <linux@xxxxxxxxxxx> _______________________________________________ arm mailing list -- arm@xxxxxxxxxxxxxxxxxxxxxxx To unsubscribe send an email to arm-leave@xxxxxxxxxxxxxxxxxxxxxxx Fedora Code of Conduct: https://docs.fedoraproject.org/en-US/project/code-of-conduct/ List Guidelines: https://fedoraproject.org/wiki/Mailing_list_guidelines List Archives: https://lists.fedoraproject.org/archives/list/arm@xxxxxxxxxxxxxxxxxxxxxxx Do not reply to spam on the list, report it: https://pagure.io/fedora-infrastructure
