> +	res = platform_get_resource(pdev, IORESOURCE_MEM, 1);

This breaks using a single MMIO for TX and RX. I will work on a better
solution.

> +	if (res) {
> +		tdev->rx_mmio = devm_ioremap_resource(&pdev->dev, res);
> +		if (PTR_ERR(tdev->rx_mmio) == -EBUSY) {
> +			size = resource_size(res);
> +			tdev->rx_mmio = devm_ioremap(&pdev->dev, res->start, size);
> +		} else if (IS_ERR(tdev->rx_mmio)) {
> +			tdev->rx_mmio = tdev->tx_mmio;
> +		}