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SK-AM62B: i2c tool detect timed out

Iron Kang
Prodigy 50 points
Part Number: SK-AM62B

Hi Ti

I use i2c tool to detect all devices on i2c-1. 

When I type command 'i2cdetect -y -r 1', i would receive warning kernel message "map_i2c 20010000.i2c: controller timed out".

I use logic analyzer to logic analyzer the i2c bus state. As soon as i2cdetect scan security IC, the Data pin would keep low.

But it is normal that I use ioctl to read/write data from i2c bus.

By the way, it's normal when i use i2c tool to detect another device on the same bus(i2c-1).

Thanks

  • 0
    TI__Guru* 88245 points

    Hello Iron,

    Apologies for the delayed response on this thread. Do you still need support here?

    If so, 

    1) I assume this is on your custom board?

    2) Have we already added the I2C devices to the updated Linux devicetree?

    3) Are you seeing any helpful terminal output during boot time about the I2C and peripherals?

    4) Please reword this sentence, I do not understand what you mean by "normal" here: "By the way, it's normal when i use i2c tool to detect another device on the same bus(i2c-1)"

    Regards,

    Nick