On Fri, 2013-12-06 at 20:53 +1100, James Cameron wrote: > I don't understand why /dev/ttyS2 (4,66) changed to /dev/ttyS0 (4,64) > after the patch was applied to olpc-kernel/arm-3.5 but, as you say it > doesn't change, perhaps there is something between 3.5 and now for me > to watch out for. My problem. The old pxa.c set device ids explicitly: -static int serial_pxa_probe_dt(struct platform_device *pdev, - struct uart_pxa_port *sport) -{ - struct device_node *np = pdev->dev.of_node; - int ret; - - if (!np) - return 1; - - ret = of_alias_get_id(np, "serial"); - if (ret < 0) { - dev_err(&pdev->dev, "failed to get alias id, errno %d \n", ret); - return ret; - } - sport->port.line = ret; - return 0; -} and - ret = serial_pxa_probe_dt(dev, sport); - if (ret > 0) - sport->port.line = dev->id; However, this is not possible with 8250_core. The latter assigns device ids strictly in the call order of serial8250_register_8250_port(). Hope it helps. -- To unsubscribe from this list: send the line "unsubscribe devicetree" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html