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TSuzu6
Beginner
1,029 Views

Chip address for 82580 i2c interface with Linux

Hi! all

I use 82580EB whose i2c interface(SFP0_I2C_CLK,DATA) is connected to an i2c slave device.

I make igb driver as below,

[detail]

-Base ver:igb-5.2.9.4.tar.gz

-patches:add_i2cenable_parameter.patch

i2c_disables_oe_when_reading_scl_and_sda.patch

i2c_tristates_pins_for_high_value.patch

I try to check i2c interface as following steps,

(1)modprobe -r igb

(2)modprobe igb I2CBB=1

(3)modprobe i2c-dev

(4)i2cdetect - 0

-----------------------------result------------------------------------------

WARNING! This program can confuse your I2C bus, cause data loss and worse!

I will probe file /dev/i2c-0.

I will probe address range 0x03-0x77.

Continue? [Y/n] y

0 1 2 3 4 5 6 7 8 9 a b c d e f

00: -- -- -- -- -- 08 -- -- -- -- -- -- --

10: -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --

20: -- -- -- -- 24 -- -- -- -- -- -- -- -- -- -- --

30: -- -- -- -- -- -- -- -- 38 -- -- -- -- -- -- --

40: -- -- -- -- 44 -- -- -- -- -- -- -- -- -- -- --

50: 50 -- -- -- -- -- -- -- -- -- -- -- -- -- -- --

60: -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --

70: -- -- -- -- -- -- -- --

------------------------------------------------------------------------------------

I guess that "i2cdetect -y 0" detects 4 i2c interface. Because 82580 has 4 i2c interface.

But the result means that 5 i2c interface are detected.

I would like to know that what device is maeached to each chip address.

How should I confrm the relation between chip address and actual device ?

Best Regards,

Taira

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2 Replies
idata
Community Manager
101 Views

Hi Taira,

 

 

Thank you for posting in Wired Ethernet Community.

 

 

Based on your question, it involves integrating of ethernet component to your system, Our embedded community would be the best route for your needs. kindly visit the link below.

 

 

https://embedded.communities.intel.com/community/en

 

 

 

Best Regards,

 

Vince
TSuzu6
Beginner
101 Views

Hi Vince

Thank you for your response.

OK. I move to your link and post.

BR,

Taira

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