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This patch adds a dummy PTP clock driver implementation that provides a software-based PTP clock for testing and development purposes. Key changes include: 1. Dummy PTP clock driver implementation: - Added drivers/timers/ptp_clock_dummy.c - Provides software-based PTP clock using system monotonic clock - Implements all required lower-half driver operations 2. Lower-half driver operations: - adjfine: Frequency adjustment (stores adjustment value) - adjtime: Time offset adjustment (applies delta to base time) - gettime: Returns current PTP clock time - settime: Sets PTP clock time - getcaps: Reports clock capabilities (1 billion PPB max adjustment) - getcrosststamp: Provides system/device cross-timestamp 3. Driver initialization: - Added ptp_clock_dummy_init() in drivers/drivers_initialize.c - Auto-registration under CONFIG_PTP_CLOCK_DUMMY configuration - Creates /dev/ptp0 character device node 4. Build system integration: - Added CONFIG_PTP_CLOCK_DUMMY Kconfig option (depends on PTP_CLOCK) - Updated CMakeLists.txt and Make.defs - Added include/nuttx/timers/ptp_clock_dummy.h header 5. Implementation details: - Uses clock_gettime(CLOCK_MONOTONIC) as time base - Tracks time offset and frequency adjustment internally - Suitable for testing PTP clock applications without hardware This dummy driver enables development and testing of PTP clock applications on platforms without dedicated PTP hardware support. Signed-off-by: dongjiuzhu1 <dongjiuzhu1@xiaomi.com> |
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| binfmt | ||
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| cmake | ||
| crypto | ||
| Documentation | ||
| drivers | ||
| dummy | ||
| fs | ||
| graphics | ||
| include | ||
| libs | ||
| mm | ||
| net | ||
| openamp | ||
| pass1 | ||
| sched | ||
| syscall | ||
| tools | ||
| video | ||
| wireless | ||
| .asf.yaml | ||
| .codespell-ignore-lines | ||
| .codespellrc | ||
| .editorconfig | ||
| .gitignore | ||
| .gitmessage | ||
| .pre-commit-config.yaml | ||
| .yamllint | ||
| AUTHORS | ||
| CMakeLists.txt | ||
| CONTRIBUTING.md | ||
| INVIOLABLES.md | ||
| Kconfig | ||
| LICENSE | ||
| Makefile | ||
| NOTICE | ||
| README.md | ||
| ReleaseNotes | ||
Apache NuttX is a real-time operating system (RTOS) with an emphasis on standards compliance and small footprint. Scalable from 8-bit to 64-bit microcontroller environments, the primary governing standards in NuttX are POSIX and ANSI standards. Additional standard APIs from Unix and other common RTOSs (such as VxWorks) are adopted for functionality not available under these standards, or for functionality that is not appropriate for deeply-embedded environments (such as fork()).
For brevity, many parts of the documentation will refer to Apache NuttX as simply NuttX.
Getting Started
First time on NuttX? Read the Getting Started guide! If you don't have a board available, NuttX has its own simulator that you can run on terminal.
Documentation
You can find the current NuttX documentation on the Documentation Page.
Alternatively, you can build the documentation yourself by following the Documentation Build Instructions.
The old NuttX documentation is still available in the Apache wiki.
Supported Boards
NuttX supports a wide variety of platforms. See the full list on the Supported Platforms page.
Contributing
If you wish to contribute to the NuttX project, read the Contributing guidelines for information on Git usage, coding standard, workflow and the NuttX principles.
License
The code in this repository is under either the Apache 2 license, or a license compatible with the Apache 2 license. See the License Page for more information.