U-boot prints strange characters

[SimoneBongini]

Hello

I'm using an ArrowElectronic Shield96 boad which based on SAMA5D27_SIP.

I was able to build:

• at91bootstrap (4.0.5+gitAUTOINC+8fe4b67188-r0 )
• at91 u-boot (v2022.01-at91+gitAUTOINC+76f7f55e04-r0)
• at91 linux kernel (5.15+gitAUTOINC+5aedde3bc3-r0)
• rootFS obtaining a .wic image. After flashed successfully the SDCard with balenaEtcher, I got that the U-boot print strange characters.

AT91Bootstrap 4.0.5 (2022-11-09 13:05:42) SD/MMC: Image: Read file u-boot.bin to 0x23f0000 MMC: ADMA supported SD: Card Capacity: High or Extended SD: Specification Version 3.0X SD/MMC: Done to load image 怘▒怘▒f3▒0▒▒▒▒?▒▒▒▒?▒▒<f̆▒f?▒▒▒▒f▒f▒f▒ x ▒x x ▒▒0?3▒x?▒▒▒▒▒▒▒▒▒▒x ~ ▒▒▒▒▒▒f ▒▒▒▒▒▒03 03▒0▒f3▒▒▒ffff▒ ▒x▒0fx▒0▒▒f▒▒▒▒▒ ▒▒▒x ▒▒▒▒fff ▒▒f▒▒▒▒f▒▒▒ ... ▒▒Ø▒▒f▒x<x ▒▒▒▒▒▒<Ø▒▒3▒f3xx0▒▒▒▒▒怘▒怘▒3?<??▒▒▒~<▒▒fÆ▒f<▒???▒0303▒ Booting Linux on physical CPU 0x0 Linux version 5.15.68-linux4microchip-2022.10 (oe-user@oe-host) (arm-poky-linux-gnueabi-gcc (GCC) 11.3.0, GNU ld (GNU Binutils) 2.38.20220708) #1 Wed Nov 9 12:48:42 UTC 2022 CPU: ARMv7 Processor [410fc051] revision 1 (ARMv7), cr=10c53c7d CPU: PIPT / VIPT nonaliasing data cache, VIP

Then kernel start normally.

Seems u-boot change serial baudrate. Is it possible?