Query Regarding UART Controller Device Driver in Linux Kernel

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Dear Linux Kernel Community,

I hope this email finds you well. I need to work on the high speed
UART controller driver in the Linux kernel, and I have a few questions
that I would appreciate your guidance on:

I understand that the Linux kernel tree contains multiple source code
files related to UART controller device drivers. Could you please
point me to the relevant source code paths for these drivers?

What is the maximum supported UART baud rate in the current kernel
driver's supports? For example, if the hardware supports high-speed
baud rates (e.g., 12 Mbps), are there any specific design strategies
or modifications needed in the driver to support such high speeds?

Are there any user-space utilities available for testing UART
interfaces in Linux? If so, could you kindly share details on these
utilities or provide any resources that would be useful for testing?

Thank you for your time and support. I look forward to your response.


-- 
Thanks,
Sekhar




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