I2C4 strange behavior

[raimo]

Hi, we are using a custom board with OSD32MP157c. We have a video decoder with i2c address 0x20 (7-bit). This address is defined in the devicetree too. It’s wired to the I2C4 interface. However the linux driver doesn’t find it. The linux i2cdetect utility finds it from 0x50 address. Is there some remapping inside the MPU or some other things that should notice?

[raimo]

Sorry, there was a mistake on the board. I2c data and clock lines were swapped. So no issue with that.

• This reply was modified 3 years, 10 months ago by raimo.

[Neeraj Dantu]

ramio,

Glad you could solve your issue. Please let us know if you have more questions.

 

Best,

Neeraj

[LevDower]

Hello…in my case I copied and executed the I2C Scanner and it gave me Int32 address 112, which i right shifted by 1 and used and it WORKED for my other project!Not sure how on earth one (read, novice like me!) would think of running a scanner to determine an address of a device and then use it.

[Author]

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