Hello, I am in the process of bringing kernel 5.10 up on an mt7621-based board. The board is equipped with a temperature sensor that is connected to the i2c bus. Reading the temperature worked fine with my previous kernel (OpenWRT 4.14/downstream i2c driver), but fails when I use the upstream driver. With the 5.10 i2c-mt7621-driver, i2cdetect is no longer able to detect the sensor and i2cget fails with "Error: Read failed". An strace of i2cget reveals the cause to be the final ioctl call failing with ETIMEDOUT. Replacing the new with the old driver makes i2c work again, but I would like to try to avoid that. My knowledge of i2c is very limited, so I wondered if anyone knows what could be wrong or have any suggestions on things I can try to for example change in the driver? Thanks in advance for any help, Kristian
