feat(zdevice): add GPIO_ACTIVE_HIGH flag macro

[swoisz]

What

gpio_dt.h defined GPIO_ACTIVE_LOW but not its companion GPIO_ACTIVE_HIGH. Active-high pins already behaved correctly at runtime (active-high is simply the absence of the active-low bit — see gpio_pin_get_dt/gpio_pin_set_dt), but any board, devicetree, or application code that referenced the symbol explicitly failed to compile.

Change

• Define GPIO_ACTIVE_HIGH as (0 << 0), mirroring upstream Zephyr's named-zero form in dt-bindings/gpio/gpio.h:

  #define GPIO_ACTIVE_LOW  (1 << 0)
  #define GPIO_ACTIVE_HIGH (0 << 0)

• Add a test asserting the macro is zero and that a gpio_dt_spec declared with it behaves identically to the active-high default.

Testing

Linux test suite (idf.py --preview set-target linux && idf.py build && ./build/boreas_test.elf): 224 tests, 0 failures.

The new GPIO test compiles on the esp32s3 target only — test_gpio_flags.c is excluded from the Linux build because the mock requires ESP-IDF's driver/gpio.h.

🤖 Generated with Claude Code

[Copilot]

Pull request overview

This PR adds an explicit GPIO_ACTIVE_HIGH macro to the Zephyr-compatible gpio_dt.h GPIO DT helpers so devicetree/board/application code can state active-high intent without failing to compile, and adds a unit test verifying it is a named-zero flag and behaves identically to the default active-high behavior.

Changes:

• Define GPIO_ACTIVE_HIGH as a named-zero macro ((0 << 0)) alongside GPIO_ACTIVE_LOW.
• Add a unit test that asserts GPIO_ACTIVE_HIGH == 0 and that gpio_pin_set_dt() does not invert values when using it.
• Register the new test in the existing GPIO flags test group.

Reviewed changes

Copilot reviewed 2 out of 2 changed files in this pull request and generated no comments.

File	Description
components/zdevice/include/boreas/gpio_dt.h	Adds GPIO_ACTIVE_HIGH named-zero macro to match Zephyr dt-bindings semantics and avoid compile failures when referenced explicitly.
test/main/test_gpio_flags.c	Adds a test ensuring GPIO_ACTIVE_HIGH is zero and behaves the same as default active-high DT flags.

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