Enable i2c2-m0 in cm3 io board with b27 build

#1

Dear all , hope you are doing fine ,

i enable i2c2-m0 in restup overlay option , but still cant see it /dev/i2c* i only see i2c0 … in build b25 the i2c2-m0 enable by default , any suggestion or advice will be apricated

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regards

#2

Please show the extlinux.conf file by the cmd “cat /boot/extlinux/extlinux.conf”, if you enabled I2C2-m0, there will be a line like “fdtoverlays /boot/dtbo/rk3568-i2c2-m0.dtbo” in the extlinux.conf file.

#3

thank you for your replay , this is output

root@radxa-cm3-io:~# cat /boot/extlinux/extlinux.conf

/boot/extlinux/extlinux.conf

IMPORTANT WARNING

The configuration of this file is generated automatically.

Do not edit this file manually, use: u-boot-update

default l0
menu title U-Boot menu
prompt 1
timeout 10

label l0
menu label Ubuntu 22.04.3 LTS 5.10.160-26-rk356x
linux /boot/vmlinuz-5.10.160-26-rk356x
initrd /boot/initrd.img-5.10.160-26-rk356x

    fdtoverlays  /boot/dtbo/rk3568-i2c2-m0.dtbo
    append root=UUID=1a868455-fef3-45c0-8fe9-7a6134184750 console=ttyFIQ0,1500000n8 quiet splash loglevel=4 rw earlycon consoleblank=0 console=tty1 coherent_pool=2M irqchip.gicv3_pseudo_nmi=0 cgroup_enable=cpuset cgroup_memory=1 cgroup_enable=memory swapaccount=1

label l0r
menu label Ubuntu 22.04.3 LTS 5.10.160-26-rk356x (rescue target)
linux /boot/vmlinuz-5.10.160-26-rk356x
initrd /boot/initrd.img-5.10.160-26-rk356x

    append root=UUID=1a868455-fef3-45c0-8fe9-7a6134184750 console=ttyFIQ0,1500000n8 splash loglevel=4 rw earlycon consoleblank=0 console=tty1 coherent_pool=2M irqchip.gicv3_pseudo_nmi=0 cgroup_enable=cpuset cgroup_memory=1 cgroup_enable=memory swapaccount=1 single

root@radxa-cm3-io:~#

#4

and this from dmesg

root@radxa-cm3-io:~# dmesg | grep -i i2c
[ 12.034857] i2c /dev entries driver
[ 12.096111] rk808 0-0020: Looking up vcc8-supply property in node /i2c@fdd40000/pmic@20 failed
[ 12.096630] rk808 0-0020: Looking up vcc9-supply property in node /i2c@fdd40000/pmic@20 failed
[ 12.101175] input: rk805 pwrkey as /devices/platform/fdd40000.i2c/i2c-0/0-0020/rk805-pwrkey/input/input0

#5

Have you tried the debian system for b27? Such as radxa-cm3-io_debian_bullseye_xfce_b27.