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Nicolas Pitre 0fc9c9f46a drivers/timer/arm_arch_timer: driver revamp
Couple issues:

- `sys_clock_set_timeout()` should not base its `mtime` on the current
  time either. Tracking the `last_tick` and `last_elapsed` values avoids
  the need for all the tick rounding computation.

- The MIN_DELAY thing is pointless. The hardware performs a signed
  comparison. If the delay gets close or even behind current time then
  the IRQ will be triggered right away. This is unlikely to happen very
  often anyway so the constant overhead is uncalled for.

- Runtime 64-bits divisions on 32-bits hardware are very expensive.

- The timer must be enabled before the count can return a sensible
  value during driver init (at least on qemu_cortex_a9).

Discussion in PR #54919 applies here too.

Signed-off-by: Nicolas Pitre <npitre@baylibre.com>
2023-03-02 15:37:35 -05:00
.github ci: doc-build: fix PDF build 2023-02-23 18:52:52 -05:00
arch arch: riscv enable flash config 2023-02-28 10:29:03 +01:00
boards boards: arm: sparkfun_pro_micro_rp2040: add regulator definition on dts 2023-03-02 21:14:34 +01:00
cmake cmake/compiler: Limit warning flag usage to compatible toolchains 2023-03-01 19:42:32 -05:00
doc doc: services: device_mgmt: smp_groups: Correct smp img upload request 2023-03-02 21:14:11 +01:00
drivers drivers/timer/arm_arch_timer: driver revamp 2023-03-02 15:37:35 -05:00
dts drivers: regulator: add support for RaspberryPi Pico regulator. 2023-03-02 21:14:34 +01:00
include/zephyr drivers: regulator: add support for RaspberryPi Pico regulator. 2023-03-02 21:14:34 +01:00
kernel kernel: Remove unused derived offset symbols 2023-02-22 16:01:32 +01:00
lib lib: hashmap: Move hash table files lib/hashmap 2023-03-02 12:03:07 -05:00
misc misc: generated: update configs.c template with <zephyr/...> prefix 2022-05-09 12:45:29 -04:00
modules lvgl: change misleading options for color depth 2023-03-01 06:36:25 -05:00
samples samples: usb: mass: Increase main stack size 2023-03-02 15:05:58 +01:00
scripts footprint: ci: Remove audio SOF samples 2023-03-02 11:46:54 -05:00
share sysbuild: Check for duplicate image names 2023-01-13 12:00:57 +01:00
soc intel_adsp: cmake: add_custom_command(.mod) to fix incremental build 2023-03-02 15:34:55 -05:00
submanifests west.yml: allow users to easily add more modules 2021-10-07 13:45:42 +02:00
subsys Bluetooth: Host: Log incomplete adv reports 2023-03-02 21:19:16 +01:00
tests tests: timer_behavior: accuracy improvements 2023-03-02 21:14:52 +01:00
.checkpatch.conf checkpatch: Remove ext/ from excludes 2022-11-30 12:06:55 -05:00
.clang-format clang-format: Add CHECKIF to IfMacros 2023-02-27 10:47:11 -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 gitignore: update the list of compliance generated files 2023-01-27 18:10:44 +09:00
.gitlint gitlint: Stop ignoring merge, revert, fixup and squash commits 2022-01-10 08:13:36 -05:00
.mailmap
.yamllint scripts: compliance: add support for YAMLLint 2023-01-04 17:29:23 +01:00
CMakeLists.txt toolchain: oneApi: Fix support and update for 2023.0.0 release 2023-02-23 14:30:03 -05:00
CODE_OF_CONDUCT.md
CODEOWNERS CODEOWNERS: Update codeowners for Infineon/Cypress sources 2023-03-01 11:44:57 +01:00
CONTRIBUTING.rst
Kconfig
Kconfig.zephyr kconfig: add esp32s3 into configuration 2023-02-27 19:41:33 +01:00
LICENSE
MAINTAINERS.yml maintainers: make myself SDHC maintainer 2023-03-01 16:35:22 -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 3.3.99 2023-02-19 20:34:26 +09:00
version.h.in cmake: version.h generation performed at build time 2022-02-08 07:50:24 -05:00
west.yml west.yml: Reset MCUboot revision due to history overwrite 2023-03-02 18:23:38 +01:00
zephyr-env.cmd
zephyr-env.sh everywhere: fix typos 2022-03-18 13:24:08 -04:00

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   src="https://bestpractices.coreinfrastructure.org/projects/74/badge"></a>
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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