By debugging, get failure callstack:
ds1307_attach_adapter->i2c_probe->i2c_probe_address->i2c_smbus_xfer->i2c_smbus_xfer_emulated->i2c_transfer->i2c_davinci_xfer->i2c_davinci_xfer_msg
if (dev->cmd_err & DAVINCI_I2C_STR_NACK) {
if (msg->flags & I2C_M_IGNORE_NAK)
return msg->len;
if (stop) {
w = davinci_i2c_read_reg(dev, DAVINCI_I2C_MDR_REG);
MOD_REG_BIT(w, DAVINCI_I2C_MDR_STP, 1);
davinci_i2c_write_reg(dev, DAVINCI_I2C_MDR_REG, w);
}
*return -EREMOTEIO;*
}
Please give me the answer of this problem. Thanks.
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