i.MX ProcessorsのトピックRe: IMX8MP : Maximum baud rate for UART in Linux

IMX8MP : Maximum baud rate for UART in Linux

mahesh_hns — Mon, 26 Feb 2024 18:54:31 GMT

Hi,

What is the maximum baudrate which can be achieved in UART on an imx8mp processor which is running Linux? I read in the MRM that up to 4.8Mbps can be achieved with increasing the module clock settings.

Has it been tried in Linux? If so, what changes would I have to make ? (device tree, defconfig etc)

If that baud rate is not achievable, what is the highest which can be achieved?

Thanks

Regards

Re: IMX8MP : Maximum baud rate for UART in Linux

AldoG — Thu, 29 Feb 2024 19:43:48 GMT

Hello,

As said here:
https://community.nxp.com/t5/i-MX-Processors/uart-support-with-up-to-4Mbps/m-p/1750756

UART baudrate depende upon module clock of UART.
module_clock frequency must always be greater or equal to 16x the maximum baud rate.

You may refer to the same thread for device tree configuration.

Best reagrds/Saludos,
Aldo.