Part Number: AM625
Tool/software:
Hi,
I want to change the boot ttyS2 to ttyS4, with the pin configuration still using main_uart0.
https://e2e.ti.com/support/processors-group/processors/f/processors-forum/1295252/am623-changing-console-from-uart0-to-uart2/4916153#4916153
I referred to the configuration method mentioned in the above post, but after making the changes, the U-Boot and Linux boot messages are printed, but the login interface does not appear.
Could you please help take a look? Thanks.
My patch is as follows:
Uboot
diff --git a/arch/arm/dts/k3-am625-r5-sk.dts b/arch/arm/dts/k3-am625-r5-sk.dts
index f64d6362..b7c37a34 100644
--- a/arch/arm/dts/k3-am625-r5-sk.dts
+++ b/arch/arm/dts/k3-am625-r5-sk.dts
@@ -20,7 +20,7 @@
};
chosen {
- stdout-path = "serial2:115200n8";
+ stdout-path = "serial4:115200n8";
tick-timer = &main_timer0;
};
diff --git a/arch/arm/dts/k3-am625-sk.dts b/arch/arm/dts/k3-am625-sk.dts
index 0e3b554a..20c781cc
--- a/arch/arm/dts/k3-am625-sk.dts
+++ b/arch/arm/dts/k3-am625-sk.dts
@@ -17,7 +17,7 @@
model = "Texas Instruments AM625 SK";
aliases {
- serial2 = &main_uart0;
+ serial4 = &main_uart0;
mmc0 = &sdhci0;
mmc1 = &sdhci1;
mmc2 = &sdhci2;
@@ -29,8 +29,8 @@
};
chosen {
- stdout-path = "serial2:115200n8";
- bootargs = "console=ttyS2,115200n8 earlycon=ns16550a,mmio32,0x02800000";
+ stdout-path = "serial4:115200n8";
+ bootargs = "console=ttyS4,115200n8 earlycon=ns16550a,mmio32,0x02800000";
};
diff --git a/arch/arm/dts/k3-am62x-sk-common-u-boot.dtsi b/arch/arm/dts/k3-am62x-sk-common-u-boot.dtsi
index a9924604..10d27b75
--- a/arch/arm/dts/k3-am62x-sk-common-u-boot.dtsi
+++ b/arch/arm/dts/k3-am62x-sk-common-u-boot.dtsi
@@ -6,7 +6,7 @@
/ {
chosen {
- stdout-path = "serial2:115200n8";
+ stdout-path = "serial4:115200n8";
tick-timer = &timer1;
};
diff --git a/arch/arm/dts/k3-am62x-sk-common.dtsi b/arch/arm/dts/k3-am62x-sk-common.dtsi
index 95923508..fbcb42f2
--- a/arch/arm/dts/k3-am62x-sk-common.dtsi
+++ b/arch/arm/dts/k3-am62x-sk-common.dtsi
@@ -12,7 +12,7 @@
/ {
aliases {
- serial2 = &main_uart0;
+ serial4 = &main_uart0;
mmc0 = &sdhci0;
mmc1 = &sdhci1;
mmc2 = &sdhci2;
@@ -24,8 +24,8 @@
};
chosen {
- stdout-path = "serial2:115200n8";
- bootargs = "console=ttyS2,115200n8 earlycon=ns16550a,mmio32,0x02800000";
+ stdout-path = "serial4:115200n8";
+ bootargs = "console=ttyS4,115200n8 earlycon=ns16550a,mmio32,0x02800000";
};
diff --git a/board/ti/am62x/am62x.env b/board/ti/am62x/am62x.env
index 1b6fd397..9176d1db 100644
--- a/board/ti/am62x/am62x.env
+++ b/board/ti/am62x/am62x.env
@@ -7,29 +7,29 @@
setenv name_fdt k3-am625-beagleplay.dtb; fi;
setenv fdtfile ${name_fdt}
name_kern=Image
-console=ttyS2,115200n8
+console=ttyS4,115200n8
args_all=
if test $boot = mmc; then
setenv optargs ${optargs} earlycon=ns16550a,mmio32,0x02800000;
Linux
diff --git a/ti-u-boot/arch/arm/dts/k3-am62x-sk-common.dtsi b/ti-u-boot/arch/arm/dts/k3-am62x-sk-common.dtsi
index 95923508..fbcb42f2
--- a/ti-u-boot/arch/arm/dts/k3-am62x-sk-common.dtsi
+++ b/ti-u-boot/arch/arm/dts/k3-am62x-sk-common.dtsi
@@ -12,2 +12,2 @@
/ {
aliases {
- serial2 = &main_uart0;
+ serial4 = &main_uart0;
mmc0 = &sdhci0;
mmc1 = &sdhci1;
mmc2 = &sdhci2;
spi0 = &ospi0;
ethernet0 = &cpsw_port1;
ethernet1 = &cpsw_port2;
usb0 = &usb0;
usb1 = &usb1;
};
chosen {
- stdout-path = "serial2:115200n8";
- bootargs = "console=ttyS2,115200n8 earlycon=ns16550a,mmio32,0x02800000";
+ stdout-path = "serial4:115200n8";
+ bootargs = "console=ttyS4,115200n8 earlycon=ns16550a,mmio32,0x02800000";
};
~# cat /etc/securetty # /etc/securetty: list of terminals on which root is allowed to login. # See securetty(5) and login(1). console # Standard serial ports ttyS0 ttyS1 ttyS2 ttyS3 ttyS4 # ARM AMBA SoCs ttyAM0 ttyAM1 ttyAM2 ttyAM3 ttyAMA0 ...
