layerscape: add patches-5.4

[openwrt/staging/wigyori.git] / target / linux / layerscape / patches-5.4 / 819-uart-0013-LF-484-tty-serial-lpuart-support-UPIO_MEM32-for-lpua.patch

diff --git a/target/linux/layerscape/patches-5.4/819-uart-0013-LF-484-tty-serial-lpuart-support-UPIO_MEM32-for-lpua.patch b/target/linux/layerscape/patches-5.4/819-uart-0013-LF-484-tty-serial-lpuart-support-UPIO_MEM32-for-lpua.patch
new file mode 100644 (file)
index 0000000..b94389c
--- /dev/null
+++ b/target/linux/layerscape/patches-5.4/819-uart-0013-LF-484-tty-serial-lpuart-support-UPIO_MEM32-for-lpua.patch
@@ -0,0 +1,37 @@
+From 1b00d871c9aaa05583b50abb5ba7dfb4ed8bc4f1 Mon Sep 17 00:00:00 2001
+From: Peng Fan <peng.fan@nxp.com>
+Date: Mon, 16 Dec 2019 15:53:00 +0800
+Subject: [PATCH] LF-484 tty: serial: lpuart: support UPIO_MEM32 for lpuart32
+
+"earlycon" no need to specify the value string since it uses
+stdout-path parameters. However when earlycon and normal console
+are not using the same uart port, we need specify value string
+to earlycon, this is what we need to do when support dual linux
+using jailhouse hypervisor. The 2nd linux will use the uart
+of the 1st linux as earlycon.
+
+earlycon=lpuart32,mmio32,0x5a060010,115200 not work for i.MX8QXP.
+It is because lpuart32_early_console_setup not support little endian.
+
+Since the original code is to support UPIO_MEM32BE, so if not
+UPIO_MEM32, we still take it as UPIO_MEM32BE
+
+Acked-by: Fugang Duan <fugang.duan@nxp.com>
+Signed-off-by: Peng Fan <peng.fan@nxp.com>
+---
+ drivers/tty/serial/fsl_lpuart.c | 4 +++-
+ 1 file changed, 3 insertions(+), 1 deletion(-)
+
+--- a/drivers/tty/serial/fsl_lpuart.c
++++ b/drivers/tty/serial/fsl_lpuart.c
+@@ -2600,7 +2600,9 @@ static int __init lpuart32_early_console
+       if (!device->port.membase)
+               return -ENODEV;
+ 
+-      device->port.iotype = UPIO_MEM32BE;
++      if (device->port.iotype != UPIO_MEM32)
++              device->port.iotype = UPIO_MEM32BE;
++
+       device->con->write = lpuart32_early_write;
+       return 0;
+ }