From 392865cdcca83fbc9624725e505feb31dda7e67a Mon Sep 17 00:00:00 2001 From: Andy Duan Date: Mon, 28 Jan 2019 14:29:14 +0800 Subject: [PATCH] MLK-18137: fsl_lpuart: Fix loopback mode Register offset needs to be applied on mapbase also. dma_tx/rx_request use the physical address of UARTDATA. Register offset is currently only applied to membase (the corresponding virtual addr) but not on mapbase. Reviewed-by: Leonard Crestez Acked-by: Fugang Duan Signed-off-by: Adriana Reus --- drivers/tty/serial/fsl_lpuart.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) --- a/drivers/tty/serial/fsl_lpuart.c +++ b/drivers/tty/serial/fsl_lpuart.c @@ -2452,7 +2452,7 @@ static int lpuart_probe(struct platform_ return PTR_ERR(sport->port.membase); sport->port.membase += sdata->reg_off; - sport->port.mapbase = res->start; + sport->port.mapbase = res->start + sdata->reg_off; sport->port.dev = &pdev->dev; sport->port.type = PORT_LPUART; sport->devtype = sdata->devtype;