topic C3708 i2c address in Embedded Intel Atom® Processors

C3708 i2c address

Jing1127 — Thu, 03 Mar 2022 10:33:27 GMT

Hello

We use C3708 for our CPU ,after we detect i2c in Linux shell.We found that there is an address we don't define, but always show in our i2c result.That address is 0x08. I want to ask what is that address? Is this address that originally existed in the C3708?

Thanks~~

Re: C3708 i2c address

Adolfo_S_Intel — Thu, 03 Mar 2022 20:09:24 GMT

Hello, @Jing1127

Coudl you please indicate the exact linux command you used, and share the output?

BR,

@Adolfo_S_Intel

Re: C3708 i2c address

Jing1127 — Fri, 04 Mar 2022 01:01:22 GMT

Hello @Adolfo_S_Intel

I use the command is i2cdetect -y 0 and my result is as show below.

Thanks~~

Re: C3708 i2c address

Adolfo_S_Intel — Thu, 10 Mar 2022 01:08:27 GMT

Hello, @Jing1127 ,

The board you are using is a Third Party board or it is manufactured by your own company?

BR,

@Adolfo_S_Intel

Re: C3708 i2c address

Jing1127 — Mon, 14 Mar 2022 01:16:44 GMT

Hello @Adolfo_S_Intel

The board is made by ourselves .We confirm that we don't define this address.

So we want to know if this address may exist in C3708?

Thanks~~

Re: C3708 i2c address

Adolfo_S_Intel — Wed, 16 Mar 2022 23:17:10 GMT

Hello, @Jing1127 ,

Do you see the device in the /sys/bus/i2c/devices/ if so, as suggested by this article: https://www.kernel.org/doc/html/latest/i2c/i2c-sysfs.html it might be possible that the device folder has a name file or information about the type of device.

Also can you confirm what do you see with the commands:

i2cget -y -f 0 or i2cget -y -f 1

Best Regards,

@Adolfo_S_Intel

Re: C3708 i2c address

Jing1127 — Fri, 01 Apr 2022 06:51:39 GMT

Hello @Adolfo_S_Intel

Sorry for replying so late.

I use the command # ls /sys/bus/i2c/devices/,and it show as below.

I try some command and found as below.

Is that 0x08 is address of LNXCPU or device in C3708?

Also I try the command i2cget -y -f 0 as below.

But it seems like 0x08 is not exists.

Thanks~~

Re: C3708 i2c address

Adolfo_S_Intel — Fri, 01 Apr 2022 18:06:45 GMT

Hello, @Jing1127 ,

Can you show me the contents of /sys/bus/i2cdevices/i2c-0/?
What do you see on the LNXCPU:08 folder and what do you see on the device:08 folder?

I would suggest you also consult within the Linux community.

BR,

@Adolfo_S_Intel

Re: C3708 i2c address

Jing1127 — Wed, 06 Apr 2022 01:27:34 GMT

Hello @Adolfo_S_Intel

The result of the contents of /sys/bus/i2cdevices/i2c-0/ show as below.

The result on the LNXCPU:08 folder and the device:08 folder as below

Thanks~~