layerscape: add patches-5.4

[openwrt/staging/wigyori.git] / target / linux / layerscape / patches-5.4 / 819-uart-0004-MLK-18137-fsl_lpuart-Fix-loopback-mode.patch

diff --git a/target/linux/layerscape/patches-5.4/819-uart-0004-MLK-18137-fsl_lpuart-Fix-loopback-mode.patch b/target/linux/layerscape/patches-5.4/819-uart-0004-MLK-18137-fsl_lpuart-Fix-loopback-mode.patch
new file mode 100644 (file)
index 0000000..0f9f2dc
--- /dev/null
+++ b/target/linux/layerscape/patches-5.4/819-uart-0004-MLK-18137-fsl_lpuart-Fix-loopback-mode.patch
@@ -0,0 +1,28 @@
+From 392865cdcca83fbc9624725e505feb31dda7e67a Mon Sep 17 00:00:00 2001
+From: Andy Duan <fugang.duan@nxp.com>
+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 <leonard.crestez@nxp.com>
+Acked-by: Fugang Duan <fugang.duan@nxp.com>
+Signed-off-by: Adriana Reus <adriana.reus@nxp.com>
+---
+ 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
+@@ -2454,7 +2454,7 @@ 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;