Hi, I'm evaluating tcan4550 on Raspberry Pi 5 and currently using tcan4x5x module from 6.11.y tree (because I think there are some performance improvements there, which aren't available in 6.6.y). I think I found an issue if I set up can interface and do os reboot *without* setting interface down first. [ 7.917431] tcan4x5x spi0.0: Detected TCAN device version generic [ 7.919833] tcan4x5x spi0.0: refusing to configure device when in normal mode [ 7.927054] tcan4x5x spi0.0 (unnamed net_device) (uninitialized): failed to enable configuration mode [ 7.961160] tcan4x5x spi0.0: Failed registering m_can device -EBUSY [ 7.967940] tcan4x5x: probe of spi0.0 failed with error -16 Based on above log, I figured that "refusing to configure..." message is from this patch: https://lore.kernel.org/all/20240607105210.155435-1-martin@xxxxxxxxxx My question: is this expected? If I do `ip link set can0 down` before doing reboot, the issue disappears. I'm not sure if doing `systemctl reboot` should also set interface down, I think that's not the case. Regards, Renjaya
