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 deb9d4fa9cb0..b757fd1bdbfa 100644 --- a/drivers/tty/serial/fsl_lpuart.c +++ b/drivers/tty/serial/fsl_lpuart.c @@ -2164,7 +2164,7 @@ 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; ret = platform_get_irq(pdev, 0);