LS1043A-process about I2C bus Arbitration Lost

[qingshanli]

In linux i2c driver i2c-imx.c:

if(temp & I2SR_IAL) {

    temp &= ~I2SR_IAL;

    imx_i2c_write_reg(temp, i2c_imx, IMX_I2C_I2SR);

    return -EAGAIN;

}

Here if I2SR_IAL be 1, driver will write zero to clear it.

But in <QorIQ LS1043A Reference Manual> chapter 24.5.6, there have a line to descript IBAL: This bit must be cleared by software, by writing a one  to it. A write of zero has no effect.

So there is different desc about how to clear arbitration lost status in the driver code and reference manual. Which one is right?

[alexander_yakov]

Sorry for delayed response.

The code is correct for i.MX processors, but not correct for LSxxxx processors.

This question is already asked, please look for example this link:

https://community.nxp.com/thread/446887

Have a great day,
Alexander
TIC

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