Changing UART Baudrate to 115200


I want to change UART baudrate from 1500000 to 115200, how can i do that? I try to update U-Boot setting “CONFIG_BAUDRATE” in evb-rk3399_defconfig file.

Thanks for your help and support

One solution is to update the device tree node:

1 Like

Thanks a lot. It worked on my setup.

Hi @Loic,

I tried this change on Rock960c board. But the changes do not seem to take effect. I still get output at baud 1500000.

Also, I tried your suggesion at "getty: bad speed: 1500000" Error - #3 by csagin, by changing extconf at ./build/extlinux/rk3399.conf to the following.

console=ttyFIQ0,115200n8 .

The complete file looks like below

label kernel-4.4
    kernel /Image
    fdt /rock960-model-c-linux.dtb
    append earlycon=uart8250,mmio32,0xff1a0000 swiotlb=1 coherent_pool=1m earlyprintk console=ttyFIQ0,115200n8 rw root=PARTUUID=b921b045-1d rootfstype=ext4 init=/sbin/init rootwait

Could you please suggest?