imx6 uart module clock

[deepanrajanbara]

hi,

I am working on Imx6 with Linux Kernel and what we require is the wanted to the debug uart to work at 4Mbps but the baudrate given defaultly is  115200 . In reference to i.MX 6Dual/6Quad Applications Processor Reference Manual, Rev. 2, 06/2014.it was found that in order to change the baudrate the module clock must be change according to reference clock but not able to locate the module clock value or the reference clock value for Uart in u-boot level.so if anyone know how to configure the Uart please reply.

Thankyou

[alejandrolozan1]

Hi,

You first can try to change the next:

/include/configs/mx6sabre_common.h   :#define CONFIG_BAUDRATE

115200

It might be probable that you might need to change the clock source of the module. But first try this change.

Please let me know how it goes.

Best Regards,

Alejandro

[deepanrajanbara]

Hi,

Actually i changed

#define CONFIG_BAUDRATE

4000000

But for 4000000 baudrate do i need to change the register value.when i run with this u-boot the terminal comes with junk characters in teraterm with baudrate 115200.how do i set the baudrate in teraterm or minicom with 4000000 baudrate.

Thankyou,

Deepanraj

[igorpadykov]

Hi Deepanraj

you can check some fixes for high baudrates below

[PATCH 0/5] serial: imx: fixes (Linux Serial)

Best regards

chip

[deepanrajanbara]

Actually i am not able to find the patch file