[PATCH 1/2] arm: mach-k3: am642: Update MAIN UART1 serial alias from 3 to 1

Vishal Mahaveer vishalm at ti.com
Fri Jun 5 21:38:28 CEST 2026


The upstream device tree changed the serial alias for MAIN UART1 from
serial3 to serial1. Update the board initialization code to match this
change by modifying the UCLASS_SERIAL sequence number lookup.

This ensures proper pin control configuration for the UART used by
system firmware (SYSFW).

Signed-off-by: Vishal Mahaveer <vishalm at ti.com>
---
 arch/arm/mach-k3/am64x/am642_init.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/arch/arm/mach-k3/am64x/am642_init.c b/arch/arm/mach-k3/am64x/am642_init.c
index a15adf1cb1e..d6cc7a85aae 100644
--- a/arch/arm/mach-k3/am64x/am642_init.c
+++ b/arch/arm/mach-k3/am64x/am642_init.c
@@ -212,14 +212,14 @@ void board_init_f(ulong dummy)
 
 #if defined(CONFIG_K3_LOAD_SYSFW)
 	/*
-	 * Process pinctrl for serial3 a.k.a. MAIN UART1 module and continue
+	 * Process pinctrl for serial1 a.k.a. MAIN UART1 module and continue
 	 * regardless of the result of pinctrl. Do this without probing the
 	 * device, but instead by searching the device that would request the
 	 * given sequence number if probed. The UART will be used by the system
 	 * firmware (SYSFW) image for various purposes and SYSFW depends on us
 	 * to initialize its pin settings.
 	 */
-	ret = uclass_find_device_by_seq(UCLASS_SERIAL, 3, &dev);
+	ret = uclass_find_device_by_seq(UCLASS_SERIAL, 1, &dev);
 	if (!ret)
 		pinctrl_select_state(dev, "default");
 
-- 
2.34.1



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