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Tom Burdick b14296af38 dma: HDA ignore repeated start/stop requests
The DMA API contract specifies that start/stop may be called multiple
times. Prior to adding power management this was perfectly fine as it was.
In adding power management, there are additional side effects that can
cause issues. Instead check the state of the channel prior to start/stop
and do nothing if already in the desired state.

Signed-off-by: Tom Burdick <thomas.burdick@intel.com>
2023-01-23 11:51:21 -08:00
.github ci: doc-build: change Doxygen download URL 2023-01-19 17:13:36 +01:00
arch xtensa: stop execution under simulator for double exception 2023-01-23 10:09:18 +00:00
boards samples: watchdog: board s32z270dc2_r52 only build and not running 2023-01-23 11:46:43 -08:00
cmake cmake/gcc: Don't use -nostdinc with toolchain picolibc 2023-01-20 09:03:25 +01:00
doc doc: dts: add missing entry to dts/bindings search path 2023-01-23 07:16:04 -08:00
drivers dma: HDA ignore repeated start/stop requests 2023-01-23 11:51:21 -08:00
dts dts: arm: stm32 devices include the dma definitions for driver 2023-01-23 09:15:21 -06:00
include/zephyr dma: Document expected behavior of start/stop 2023-01-23 11:51:21 -08:00
kernel treewide: Use CONFIG_CPP instead of CONFIG_CPLUSPLUS 2023-01-13 17:42:55 -05:00
lib posix: mqueue: do not typedef mq_attr 2023-01-23 09:57:31 -08:00
misc misc: generated: update configs.c template with <zephyr/...> prefix 2022-05-09 12:45:29 -04:00
modules manifest: openthread upmerge up to commit a1979fd 2023-01-18 12:14:59 +01:00
samples samples: watchdog: board s32z270dc2_r52 only build and not running 2023-01-23 11:46:43 -08:00
scripts twister: Better messages for keyed test exclusions 2023-01-20 12:17:29 +01:00
share sysbuild: Check for duplicate image names 2023-01-13 12:00:57 +01:00
soc dma: HDA ignore repeated start/stop requests 2023-01-23 11:51:21 -08:00
submanifests west.yml: allow users to easily add more modules 2021-10-07 13:45:42 +02:00
subsys net: sockets: conditionally include zephyr/posix/fcntl.h 2023-01-23 09:57:31 -08:00
tests dma: Test repeatedly calling start/stop 2023-01-23 11:51:21 -08:00
.checkpatch.conf checkpatch: Remove ext/ from excludes 2022-11-30 12:06:55 -05:00
.clang-format tools: Fix clang-format values 2023-01-19 09:18:05 -08:00
.codecov.yml yamllint: fix all yamllint comments errors 2023-01-04 01:16:45 +09:00
.editorconfig editorconfig: Improve verbosity 2022-04-28 08:55:39 -04:00
.gitattributes gitattributes: consider SVG files generated 2021-10-14 12:42:44 -04:00
.gitignore scripts: compliance: Use consistent naming convention 2022-11-21 11:02:39 -05:00
.gitlint gitlint: Stop ignoring merge, revert, fixup and squash commits 2022-01-10 08:13:36 -05:00
.mailmap mailmap: update mailmap file with some stray emails 2021-06-17 14:15:41 -04:00
.yamllint scripts: compliance: add support for YAMLLint 2023-01-04 17:29:23 +01:00
CMakeLists.txt cpp: Fix toolchain C++ standard library linkage 2023-01-17 09:21:09 +01:00
CODE_OF_CONDUCT.md
CODEOWNERS CODEOWNERS: remove inactive code owners 2023-01-18 15:13:37 -05:00
CONTRIBUTING.rst doc: Fixed a link in CONTRIBUTING.rst 2019-02-28 12:46:04 -08:00
Kconfig kconfig: Clean up header comments and make them consistent 2019-11-04 17:31:27 -05:00
Kconfig.zephyr kconfig: linker: Add --no-relax build option 2023-01-16 11:20:32 +00:00
LICENSE
MAINTAINERS.yml MAINTAINERS: remove inactive maintainers/collaborators 2023-01-18 15:13:37 -05:00
README.rst readme: Add support for light/dark modes in the logo 2022-11-18 08:58:59 +01:00
VERSION VERSION: bump to 3.2.99 2022-09-30 13:06:22 -05:00
version.h.in cmake: version.h generation performed at build time 2022-02-08 07:50:24 -05:00
west.yml manifest: pull mcuboot change for sys_clock_disable refactor 2023-01-20 20:02:20 +01:00
zephyr-env.cmd scripts: remove west from scripts/ 2019-01-29 10:15:01 +01:00
zephyr-env.sh everywhere: fix typos 2022-03-18 13:24:08 -04:00

.. raw:: html

   <a href="https://www.zephyrproject.org">
     <p align="center">
       <picture>
         <source media="(prefers-color-scheme: dark)" srcset="doc/_static/images/logo-readme-dark.svg">
         <source media="(prefers-color-scheme: light)" srcset="doc/_static/images/logo-readme-light.svg">
         <img src="doc/_static/images/logo-readme-light.svg">
       </picture>
     </p>
   </a>

   <a href="https://bestpractices.coreinfrastructure.org/projects/74"><img
   src="https://bestpractices.coreinfrastructure.org/projects/74/badge"></a>
   <a
   href="https://github.com/zephyrproject-rtos/zephyr/actions/workflows/twister.yaml?query=branch%3Amain">
   <img
   src="https://github.com/zephyrproject-rtos/zephyr/actions/workflows/twister.yaml/badge.svg?event=push"></a>


The Zephyr Project is a scalable real-time operating system (RTOS) supporting
multiple hardware architectures, optimized for resource constrained devices,
and built with security in mind.

The Zephyr OS is based on a small-footprint kernel designed for use on
resource-constrained systems: from simple embedded environmental sensors and
LED wearables to sophisticated smart watches and IoT wireless gateways.

The Zephyr kernel supports multiple architectures, including ARM (Cortex-A,
Cortex-R, Cortex-M), Intel x86, ARC, Nios II, Tensilica Xtensa, and RISC-V,
SPARC, MIPS, and a large number of `supported boards`_.

.. below included in doc/introduction/introduction.rst


Getting Started
***************

Welcome to Zephyr! See the `Introduction to Zephyr`_ for a high-level overview,
and the documentation's `Getting Started Guide`_ to start developing.

.. start_include_here

Community Support
*****************

Community support is provided via mailing lists and Discord; see the Resources
below for details.

.. _project-resources:

Resources
*********

Here's a quick summary of resources to help you find your way around:

* **Help**: `Asking for Help Tips`_
* **Documentation**: http://docs.zephyrproject.org (`Getting Started Guide`_)
* **Source Code**: https://github.com/zephyrproject-rtos/zephyr is the main
  repository; https://elixir.bootlin.com/zephyr/latest/source contains a
  searchable index
* **Releases**: https://github.com/zephyrproject-rtos/zephyr/releases
* **Samples and example code**: see `Sample and Demo Code Examples`_
* **Mailing Lists**: users@lists.zephyrproject.org and
  devel@lists.zephyrproject.org are the main user and developer mailing lists,
  respectively. You can join the developer's list and search its archives at
  `Zephyr Development mailing list`_. The other `Zephyr mailing list
  subgroups`_ have their own archives and sign-up pages.
* **Nightly CI Build Status**: https://lists.zephyrproject.org/g/builds
  The builds@lists.zephyrproject.org mailing list archives the CI nightly build results.
* **Chat**: Real-time chat happens in Zephyr's Discord Server. Use
  this `Discord Invite`_ to register.
* **Contributing**: see the `Contribution Guide`_
* **Wiki**: `Zephyr GitHub wiki`_
* **Issues**: https://github.com/zephyrproject-rtos/zephyr/issues
* **Security Issues**: Email vulnerabilities@zephyrproject.org to report
  security issues; also see our `Security`_ documentation. Security issues are
  tracked separately at https://zephyrprojectsec.atlassian.net.
* **Zephyr Project Website**: https://zephyrproject.org

.. _Discord Invite: https://chat.zephyrproject.org
.. _supported boards: http://docs.zephyrproject.org/latest/boards/index.html
.. _Zephyr Documentation: http://docs.zephyrproject.org
.. _Introduction to Zephyr: http://docs.zephyrproject.org/latest/introduction/index.html
.. _Getting Started Guide: http://docs.zephyrproject.org/latest/develop/getting_started/index.html
.. _Contribution Guide: http://docs.zephyrproject.org/latest/contribute/index.html
.. _Zephyr GitHub wiki: https://github.com/zephyrproject-rtos/zephyr/wiki
.. _Zephyr Development mailing list: https://lists.zephyrproject.org/g/devel
.. _Zephyr mailing list subgroups: https://lists.zephyrproject.org/g/main/subgroups
.. _Sample and Demo Code Examples: http://docs.zephyrproject.org/latest/samples/index.html
.. _Security: http://docs.zephyrproject.org/latest/security/index.html
.. _Asking for Help Tips: https://docs.zephyrproject.org/latest/develop/getting_started/index.html#asking-for-help