target/linux/layerscape/patches-5.4/819-uart-0004-MLK-18137-fsl_lpuart-Fix-loopback-mode.patch

   1 From 392865cdcca83fbc9624725e505feb31dda7e67a Mon Sep 17 00:00:00 2001
   2 From: Andy Duan <fugang.duan@nxp.com>
   3 Date: Mon, 28 Jan 2019 14:29:14 +0800
   4 Subject: [PATCH] MLK-18137: fsl_lpuart: Fix loopback mode
   5
   6 Register offset needs to be applied on mapbase also.
   7 dma_tx/rx_request use the physical address of UARTDATA.
   8 Register offset is currently only applied to membase (the
   9 corresponding virtual addr) but not on mapbase.
  10
  11 Reviewed-by: Leonard Crestez <leonard.crestez@nxp.com>
  12 Acked-by: Fugang Duan <fugang.duan@nxp.com>
  13 Signed-off-by: Adriana Reus <adriana.reus@nxp.com>
  14 ---
  15  drivers/tty/serial/fsl_lpuart.c | 2 +-
  16  1 file changed, 1 insertion(+), 1 deletion(-)
  17
  18 --- a/drivers/tty/serial/fsl_lpuart.c
  19 +++ b/drivers/tty/serial/fsl_lpuart.c
  20 @@ -2479,7 +2479,7 @@ static int lpuart_probe(struct platform_
  21                 return PTR_ERR(sport->port.membase);
  22
  23         sport->port.membase += sdata->reg_off;
  24 -       sport->port.mapbase = res->start;
  25 +       sport->port.mapbase = res->start + sdata->reg_off;
  26         sport->port.dev = &pdev->dev;
  27         sport->port.type = PORT_LPUART;
  28         sport->devtype = sdata->devtype;