> @@ -572,15 +576,36 @@ static int mtk8250_remove(struct platform_device *pdev)
> static int __maybe_unused mtk8250_suspend(struct device *dev)
> {
> struct mtk8250_data *data = dev_get_drvdata(dev);
> + struct uart_8250_port *up = serial8250_get_port(data->line);
Sorry. This line doesn't belong to this patch. I'll send a v3.
> + int irq = data->rx_wakeup_irq;
> + int err;
>
> serial8250_suspend_port(data->line);
>
> + pinctrl_pm_select_sleep_state(dev);
> + if (irq >= 0) {
> + err = enable_irq_wake(irq);
> + if (err) {
> + dev_err(dev,
> + "failed to enable irq wake on IRQ %d: %d\n",
> + irq, err);
> + pinctrl_pm_select_default_state(dev);
> + serial8250_resume_port(data->line);
> + return err;
> + }
> + }
> +
> return 0;
> }
