Hi Chris, Am 02.03.22 um 10:51 schrieb Peter Robinson: >> 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 > All our firmware are EFI, that's the only way we support booting, is > it the default U-Boot based one or are you using the edk2 one? > >> 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 > Any chance you can tell us which kernel it started with, 5.14.x to > 5.16.x is a big window to debug and looking at kernel logs for > drivers/pps there's been no changes in that space in the 5.15+ kernels > at all. > > I wonder if it's a change/regression in the firmware overlay <-> > kernel interface. do you use the DTB file from 5.14.x or 5.16x? I guess this is related to this commit: https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/commit/?h=linux-5.16.y&id=266423e60ea1b953fcc0cd97f3dad85857e434d1 Unfortunately this is a change which requires this DTS fix: https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/commit/?h=linux-5.16.y&id=c8013355ead68dce152cf426686f8a5f80d88b40 So DTB and kernel must "match". > _______________________________________________ > 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 _______________________________________________ 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
