drivers: serial: sf32lb: add uart interrupt support

[ck-telecom]

add sf32lb52x uart interrupt support

[gmarull]

the IRQ flags are not being handled properly

[ck-telecom]

Run export ZEPHYR_BASE=${PWD}
Traceback (most recent call last):
  File "/home/runner/work/zephyr/zephyr/zephyr/./scripts/ci/test_plan.py", line 38, in <module>
    import list_boards
  File "/home/runner/work/zephyr/zephyr/zephyr/scripts/list_boards.py", line 14, in <module>
    import jsonschema
ModuleNotFoundError: No module named 'jsonschema'

this seems need install python jsonschema module

[Copilot]

Pull Request Overview

This PR adds interrupt-driven UART support to the SF32LB serial driver. The changes enable asynchronous UART operations using interrupts instead of polling, which improves performance and reduces CPU usage.

• Implements interrupt-driven UART functionality for SF32LB52x devices
• Adds interrupt service routine and callback management
• Includes error handling and status checking functions

Reviewed Changes

Copilot reviewed 2 out of 2 changed files in this pull request and generated 4 comments.

File	Description
drivers/serial/uart_sf32lb.c	Adds interrupt support infrastructure, ISR, FIFO operations, and interrupt control functions
drivers/serial/Kconfig.sf32lb	Enables interrupt support capability in the driver configuration

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[Copilot]

Pull Request Overview

Copilot reviewed 2 out of 2 changed files in this pull request and generated 3 comments.

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[gmarull]

please provide some proof this branch works as expected.

[ck-telecom]

please provide some proof this branch works as expected.

west build -p auto -b sf32lb52_devkit_lcd samples/drivers/uart/echo_bot/
west flash --runner=sftool --port <your port>

sifli trace tool seems bugs when input first word, so I am using PuTTY works well with COM5, buad rate 1000000

SFBL
    *** Booting Zephyr OS build v4.2.0-5356-g90cee9c36a53 ***
Hello! I'm your echo bot.
Tell me something and press enter:
h
Echo: h
hello
Echo: hello
123456799999999999999999999999999999999999999999
Echo: 1234567999999999999999999999999

[sonarqubecloud]

Quality Gate passed

Issues
0 New issues
0 Accepted issues

Measures
0 Security Hotspots
0.0% Coverage on New Code
0.0% Duplication on New Code

See analysis details on SonarQube Cloud

[Copilot]

Pull Request Overview

Copilot reviewed 2 out of 2 changed files in this pull request and generated 1 comment.

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