logging: allow simplified logging of UART backend

[Shawn-Huang724]

This allows no timestamps, level prefixes, and colors in UART backend logging. The message format will be similar as the ones with CONFIG_LOG_MODE_MINIMAL=y. It also could reduce the output overhead of UART interface when logging backend is enabled.

[github-actions]

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[Shawn-Huang724]

On our platform, the logging will be switched from UART to another backend when the remote side is ready. That's why we need a simple and quick output text format in UART backend. Any advice would be appreciated, thank you.

[nordic-krch]

what about instead of adding uart specific option extend to skip level and timestamp for all backends?
There is already option to not use colors (but level and timestamp is already added).

zephyr/include/zephyr/logging/log_backend_std.h

Line 28 in 54165f4

if (IS_ENABLED(CONFIG_LOG_BACKEND_SHOW_COLOR)) {

[Shawn-Huang724]

Yes, I agree to extend this option to each backend. Thanks for your thoughtful suggestion and commit is updated.

[kartben]

Please add the new Kconfig options to 4.3 release notes

[Shawn-Huang724]

Sorry, fix some log tests failed in a2b3f98. Since log_backend_std_get_flags() always returns flags with timestamp and level enabled before this PL, these two new added options should be also default enabled for all cases.

[Shawn-Huang724]

Please add the new Kconfig options to 4.3 release notes

Sure, commit is updated as d3f4b4d. Thanks.

[JarmouniA]

Suggested change

	When enabled selected backend prints timestamps with log.
	When enabled, selected backend prints timestamps with log.

[JarmouniA]

Suggested change

	When enabled selected backend prints levels with log.
	When enabled, selected backend prints levels with log.

[Shawn-Huang724]

Thanks for your careful reviewing, commits were updated as 1d9a7ae.

[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