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ARM: dts: am33xx: Add missing serial console speed

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Without a serial console speed specified in chosen/stdout-path in the
DTB, the serial console uses the default speed of the serial driver,
unless explicitly overridden in a legacy console= kernel command-line
parameter.

After dropping "ti,omap3-uart" from the list of compatible values in DT,
AM33xx serial ports can no longer be used with the legacy OMAP serial
driver, but only with the OMAP-flavored 8250 serial driver (which is
mutually-exclusive with the former).  However, replacing
CONFIG_SERIAL_OMAP=y by CONFIG_SERIAL_8250_OMAP=y (with/without enabling
CONFIG_SERIAL_8250_OMAP_TTYO_FIXUP) may not be sufficient to restore
serial console functionality: the legacy OMAP serial driver defaults to
115200 bps, while the 8250 serial driver defaults to 9600 bps, causing
no visible output on the serial console when no appropriate console=
kernel command-line parameter is specified.

Fix this for all AM33xx boards by adding ":115200n8" to
chosen/stdout-path.  This requires replacing the "&uartN" reference by
the corresponding "serialN" DT alias.

Fixes: ca8be8fc2c ("ARM: dts: am33xx-l4: fix UART compatible")
Fixes: 077e1cde78 ("ARM: omap2plus_defconfig: Enable 8250_OMAP")
Closes: https://lore.kernel.org/CAMuHMdUb7Jb2=GqK3=Rn+Gv5G9KogcQieqDvjDCkJA4zyX4VcA@mail.gmail.com
Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>
Reviewed-by: Matti Vaittinen <mazziesaccount@gmail.com>
Tested-by: Matti Vaittinen <mazziesaccount@gmail.com>
Reviewed-by: Bruno Thomsen <bruno.thomsen@gmail.com>
Link: https://lore.kernel.org/r/63cef5c3643d359e8ec13366ca79377f12dd73b1.1759398641.git.geert+renesas@glider.be
Signed-off-by: Kevin Hilman <khilman@baylibre.com>
This commit is contained in:
Geert Uytterhoeven
2025-10-02 11:53:05 +02:00
committed by Kevin Hilman
parent 3a86608788
commit 9c95fc710b
12 changed files with 12 additions and 12 deletions
Download Patch File Download Diff File Expand all files Collapse all files

2
arch/arm/boot/dts/ti/omap/am335x-bone-common.dtsi
View File

@@ -16,7 +16,7 @@ memory@80000000 {
};
chosen {
stdout-path = &uart0;
stdout-path = "serial0:115200n8";
};
leds {

2
arch/arm/boot/dts/ti/omap/am335x-boneblue.dts
View File

@@ -13,7 +13,7 @@ / {
compatible = "ti,am335x-bone-blue", "ti,am33xx";
chosen {
stdout-path = &uart0;
stdout-path = "serial0:115200n8";
};
leds {

2
arch/arm/boot/dts/ti/omap/am335x-chiliboard.dts
View File

@@ -12,7 +12,7 @@ / {
"ti,am33xx";
chosen {
stdout-path = &uart0;
stdout-path = "serial0:115200n8";
};
leds {

2
arch/arm/boot/dts/ti/omap/am335x-evm.dts
View File

@@ -23,7 +23,7 @@ memory@80000000 {
};
chosen {
stdout-path = &uart0;
stdout-path = "serial0:115200n8";
};
vbat: fixedregulator0 {

2
arch/arm/boot/dts/ti/omap/am335x-evmsk.dts
View File

@@ -30,7 +30,7 @@ memory@80000000 {
};
chosen {
stdout-path = &uart0;
stdout-path = "serial0:115200n8";
};
vbat: fixedregulator0 {

2
arch/arm/boot/dts/ti/omap/am335x-guardian.dts
View File

@@ -14,7 +14,7 @@ / {
compatible = "bosch,am335x-guardian", "ti,am33xx";
chosen {
stdout-path = &uart0;
stdout-path = "serial0:115200n8";
tick-timer = &timer2;
};

2
arch/arm/boot/dts/ti/omap/am335x-icev2.dts
View File

@@ -22,7 +22,7 @@ memory@80000000 {
};
chosen {
stdout-path = &uart3;
stdout-path = "serial3:115200n8";
};
vbat: fixedregulator0 {

2
arch/arm/boot/dts/ti/omap/am335x-myirtech-myd.dts
View File

@@ -15,7 +15,7 @@ / {
compatible = "myir,myd-am335x", "myir,myc-am335x", "ti,am33xx";
chosen {
stdout-path = &uart0;
stdout-path = "serial0:115200n8";
};
clk12m: clk12m {

2
arch/arm/boot/dts/ti/omap/am335x-osd3358-sm-red.dts
View File

@@ -147,7 +147,7 @@ simple-audio-card,codec {
};
chosen {
stdout-path = &uart0;
stdout-path = "serial0:115200n8";
};
leds {

2
arch/arm/boot/dts/ti/omap/am335x-pdu001.dts
View File

@@ -21,7 +21,7 @@ / {
compatible = "ti,am33xx";
chosen {
stdout-path = &uart3;
stdout-path = "serial3:115200n8";
};
cpus {

2
arch/arm/boot/dts/ti/omap/am335x-pocketbeagle.dts
View File

@@ -15,7 +15,7 @@ / {
compatible = "ti,am335x-pocketbeagle", "ti,am335x-bone", "ti,am33xx";
chosen {
stdout-path = &uart0;
stdout-path = "serial0:115200n8";
};
leds {

2
arch/arm/boot/dts/ti/omap/am335x-sl50.dts
View File

@@ -25,7 +25,7 @@ memory@80000000 {
};
chosen {
stdout-path = &uart0;
stdout-path = "serial0:115200n8";
};
leds {