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C3708 i2c address

Jing1127
Beginner
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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~~  

 

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Adolfo_S_Intel
Moderator
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Hello, @Jing1127 

 

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

 

BR,

@Adolfo_S_Intel 

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Jing1127
Beginner
1,416 Views

Hello @Adolfo_S_Intel 

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

Jing1127_0-1646355657765.png

Thanks~~

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Adolfo_S_Intel
Moderator
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Hello, @Jing1127 ,

 

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

 

BR,

@Adolfo_S_Intel 

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Jing1127
Beginner
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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~~

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Adolfo_S_Intel
Moderator
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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 

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Jing1127
Beginner
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Hello @Adolfo_S_Intel

 

Sorry for replying so late.

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

Jing1127_0-1648795300815.png

I try some command and found as below.

Jing1127_1-1648795523582.png

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

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

Jing1127_2-1648795821311.png

But it seems like 0x08 is not exists.

Thanks~~

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Adolfo_S_Intel
Moderator
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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 

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Jing1127
Beginner
1,057 Views

Hello @Adolfo_S_Intel

 

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

Jing1127_0-1649208246010.png

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

Jing1127_1-1649208317607.png

Jing1127_2-1649208335928.png

Thanks~~

 

 

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