fix(board_manager): default disabled PA pin to -1 instead of GPIO0 (AUD-7247)

[wxzed]

Description

Fixes the default pa_cfg initialization in dev_audio_codec.py when no PA peripheral is configured.

Problem

When an audio_codec device does not define gpio_pa_control, _parse_codec_peripherals() initializes:

• pa_cfg.name = NULL
• pa_cfg.port = 0

On ESP32-class targets, GPIO0 is a valid GPIO number, so 0 is ambiguous with “PA disabled” and can conflict with boards that use GPIO0 as I2S BCLK (see discussion in issue #42).

Change (this PR)

• Change the default pa_cfg.port from 0 to -1 when PA is not configured.

Out of scope (tracked separately / follow-up)

• Runtime hardening in dev_audio_codec.c (only apply pa_pin when PA is explicitly configured) is suggested in Bug: dev_audio_codec generator defaults PA pin to GPIO0 when PA not configured (AUD-7246) #42 but not included in this PR to keep the change minimal.

Related

Fixes #42

Testing

• Ran idf.py gen-bmgr-config for a board where audio_codec has no gpio_pa_control.
• Verified generated gen_board_device_config.c shows pa_cfg.port = -1 when PA is absent.

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Checklist

• 🚨 This PR does not introduce breaking changes.
• All CI checks (GH Actions) pass.
• Documentation is updated as needed.
• Tests are updated or added as necessary.
• Code is well-commented, especially in complex areas.
• Git history is clean — commits are squashed to the minimum necessary.

[LiuCodee]

Processing this fix. The issue will be fixed in v0.5.10.

[LiuCodee]

This fix has now been included in v0.5.10. Thanks again for the contribution and testing!

Also, esp_board_manager now has a standalone repository. Feel free to report future issues or submit PRs there:
https://github.com/espressif/esp-board-manager