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    Subject[PATCH 5.14 263/334] tty: serial: fsl_lpuart: fix the wrong mapbase value
    Date
    From: Andy Duan <fugang.duan@nxp.com>

    [ Upstream commit d5c38948448abc2bb6b36dbf85a554bf4748885e ]

    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.

    Fixes: 24b1e5f0e83c ("tty: serial: lpuart: add imx7ulp support")
    Reviewed-by: Leonard Crestez <leonard.crestez@nxp.com>
    Signed-off-by: Adriana Reus <adriana.reus@nxp.com>
    Signed-off-by: Sherry Sun <sherry.sun@nxp.com>
    Signed-off-by: Andy Duan <fugang.duan@nxp.com>
    Link: https://lore.kernel.org/r/20210819021033.32606-1-sherry.sun@nxp.com
    Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
    Signed-off-by: Sasha Levin <sashal@kernel.org>
    ---
    drivers/tty/serial/fsl_lpuart.c | 2 +-
    1 file changed, 1 insertion(+), 1 deletion(-)

    diff --git a/drivers/tty/serial/fsl_lpuart.c b/drivers/tty/serial/fsl_lpuart.c
    index f0e5da77ed6d..460e428b7592 100644
    --- a/drivers/tty/serial/fsl_lpuart.c
    +++ b/drivers/tty/serial/fsl_lpuart.c
    @@ -2611,7 +2611,7 @@ static int lpuart_probe(struct platform_device *pdev)
    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;
    --
    2.30.2


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