Hi Andrew,

Thank you for your reply.

quoted

+	rgmii_tx_delay = DIV_ROUND_CLOSEST(rgmii_tx_delay,

rgmii_delay_unit);

quoted

+	if (rgmii_tx_delay >= 32) {
+		dev_err(&pdev->dev,
+			"The index %u of TX delay setting is out of range\n",
+			rgmii_tx_delay);

The index is not really interesting here, it is not something a DT author uses. It
is the delay in ps in the .dts file which is too big.

Agreed - the "index" isn't meaningful to DT authors.
I'll modify the error message to display the actual TX/RX delay value in picoseconds 
instead of the internal index, so it's clearer which DT value is too large.

Thanks,
Jacky