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How does one operate the serial port in the kernel space ??

Source: Internet
Author: User
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How does one operate the serial port in the kernel space ?? -- Linux general technology-Linux programming and kernel information. The following is a detailed description. I have encountered a problem during development recently and I have never understood it. please help me solve it. This is the case. I need a printer driver. The driver implements the following functions: the driver receives data from the user space and then processes the data, finally, the data is transmitted to the printer through the serial port in the driver. How can I set the baud rate of the serial port in the kernel driver to implement read/write operations ??? The serial driver is already available in the system.

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