topic imx6 uart module clock in i.MX Processors

imx6 uart module clock

deepanrajanbara — Mon, 25 Aug 2014 10:25:00 GMT

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

Re: imx6 uart module clock

alejandrolozan1 — Thu, 28 Aug 2014 19:32:33 GMT

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

Re: imx6 uart module clock

deepanrajanbara — Mon, 01 Sep 2014 06:43:05 GMT

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

Re: imx6 uart module clock

igorpadykov — Tue, 02 Sep 2014 12:01:38 GMT

Hi Deepanraj

you can check some fixes for high baudrates below

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

Best regards

chip

Re: imx6 uart module clock

deepanrajanbara — Tue, 02 Sep 2014 14:44:43 GMT

Actually i am not able to find the patch file