Some progress. I reinstalled a SD and updated manually all the kernel RPMS that I can find. Only last kernel has this change (5.4.28 is still ok). On 15-Jun-20 22:59, Stephan GUILLOUX wrote: > Hello all, > > > Maybe some will be able to help a bit. > > I'm running 2 Raspberries 3B+, with the same old CentOS image, freshly > prepared. > > Both run raspberrypi2-kernel 4.19.xx > > Both Raspberry have a hat, with a valid EEPROM. > > > On both, the application I'm in charge of, has R/W access to > > /sys/class/i2c-adapter/i2c-3/3-0050/eeprom > > > On one Raspberry, I update the kernel and only the kernel (yum update > raspberrypi2-kernel) and I come to 5.4.42. > > After reboot, the whole content of /sys/class has changed, regarding I2C. > > 4.19.94: > > [root at Raspberry-DD7BD7 OLD ~]$ ls -al /sys/bus/i2c/devices/ > total 0 > drwxr-xr-x. 2 root root 0 Jan 1 1970 . > drwxr-xr-x. 4 root root 0 Jan 1 1970 .. > lrwxrwxrwx. 1 root root 0 Jan 1 1970 3-0050 -> > ../../../devices/platform/ffffffff.i2c/i2c-3/3-0050 > lrwxrwxrwx. 1 root root 0 Jan 1 1970 i2c-3 -> > ../../../devices/platform/ffffffff.i2c/i2c-3 > [root at Raspberry-DD7BD7 OLD ~]$ ls -al /sys/bus/i2c/devices/3-0050/eeprom > > 5.4.42: > > [root at CertifBox-8AC500 OLD ~]$ ls -al /sys/class/i2c-adapter/ > total 0 > drwxr-xr-x. 2 root root 0 Jan 1 1970 . > drwxr-xr-x. 54 root root 0 Jan 1 1970 .. > lrwxrwxrwx. 1 root root 0 Jun 15 22:53 i2c-11 -> > ../../devices/platform/ffffffff.i2c/i2c-11 > [root at CertifBox-8AC500 OLD ~]$ > > > Any idea where I can find this EEPROM file ? > > A module option, maybe ? > > > Regards, > > Stephan. > > > > > _______________________________________________ > Arm-dev mailing list > Arm-dev at centos.org > https://lists.centos.org/mailman/listinfo/arm-dev