|Founded||3 June 2010|
|Type||Not-for-profit engineering organization|
|Focus||Open-source software for the ARM architecture|
Linaro is a not-for-profit engineering organization that works on free and open-source software such as the Linux kernel, the GNU Compiler Collection (GCC), ARM power management, graphics and multimedia interfaces for the ARM family of instruction sets and implementations thereof as well as for the Heterogeneous System Architecture. The founding of Linaro was announced at Computex in June 2010 by ARM, Freescale Semiconductor, IBM, Samsung, ST-Ericsson, and Texas Instruments in a joint press conference. It also provides engineering and investment in upstream open source projects, a monthly release of tools and software and support to silicon companies in upstreaming code to be used with their system-on-a-chips (SoC). At some point Linaro joined the HSA Foundation.
Linaro focuses on the use of the ARM instruction set in its versions 7a (32-bit) and 8 (64-bit) including concrete implementations of these, such as SoCs that contain Cortex-A5, Cortex-A7 MPCore, Cortex-A8, Cortex-A9 MPCore, Cortex-A15, Cortex-A53 or Cortex-A57 processor(s). Linaro engineering works with upstream projects on a set of requirements that are determined by the Technical Steering Committee (TSC). At the end of each month there is a release of tools and software that acts as a staging tree for code that will be pushed upstream. Linaro works on software that is close to the silicon such as kernel, multimedia, power management, graphics and security. Linaro aims to provide stable, tested tools and code for multiple software distributions to use to reduce low-level fragmentation of embedded Linux software.
Linaro maintains an automated testing system called LAVA (Linaro Automated Validation Architecture) that Linaro developed. LAVA is for automated testing of the open source components that are used in the major Linux-based software platforms.
The Linaro Enterprise Group (LEG) focuses on Linux development for ARM servers. The Enterprise Group is made up of the following companies: AMD, AppliedMicro, ARM, Calxeda, Canonical, Cavium, Facebook, HiSilicon, HP, Marvell, Red Hat, ST Ericsson and Texas Instruments. The team's mission is to bring competing companies together to work on common solutions to problems and enable OEM's, commercial Linux providers and System on Chip (SOC) vendors to collaborate in a neutral environment on the development of the core software needed by the rapidly emerging market for low-power hyperscale servers.
The Linaro Networking Group (LNG) is a coalition of technology companies whose mission is to deliver an enhanced core Linux platform for networking equipment. Its founding members include AppliedMicro, ARM, Enea, Freescale, LSI, MontaVista, Nokia Siemens Networks and Texas Instruments (TI). With ARM-based SoCs part of the transformation occurring in cloud and mobile infrastructure applications such as switching, routing, base-stations and security, LNG’s members collaborate on fundamental software platforms to enable deployment of new services across a range of converged infrastructure platforms.
The Linaro Mobile Group (LMG) focuses on development for mobile devices, such as smartphones and tablets. As of March 2015, LMG has 3 sub-groups focusing on Android, Linux kernel changes for mobile devices, and Graphics. In the future, LMG is expected to also support ChromiumOS.
The following are milestones in the history of Linaro.
March 2010 – Company founded
- Membership agreements initiated
- Engineering begins
June 2010 – Company launch
- Website and wiki opened
- Engineering organization ramps
November 2010 – First release
- Linaro's 10.11 release is announced at TechCon
May 2011 - Second Release
- Linaro's 11.05 release and monthly releases announced
- Linaro Partner Program announced
- First independent Linaro Connect held
- Demo Friday begins to be held at each Linaro Connect
- LG Electronics joins Linaro
- HiSilicon joins Linaro
- Linaro Enterprise Group (LEG) announced
- Linaro Networking Group (LNG) announced
- Broadcom joins Linaro
- Fujitsu Semiconductor joins Linaro
- Linaro forms Security Working Group
- Qualcomm joins Linaro
- Allwinner joins Linaro
- MediaTek joins Linaro
- ZTE joins Linaro
- Samsung leaves Linaro
Between June 2010 and May 2011, Linaro had a six-month release cycle.
Since May 2011, Linaro has a monthly engineering and release cycle.
Linaro runs and continuously tests its output on member platforms. For the ARMv7-A code, these include TI's OMAP 3 and OMAP 4, Samsung's Exynos, and ST-Ericsson's NovaThor U8500. For development on platforms prior to silicon availability, e.g. big.LITTLE development starting at the end of 2011 and ARMv8-A work begun in 2012.
|Initial release||10 November 2010|
|Stable release||13.11 / 28 November 2013|
|License||EPL (default) and other licences|
There are three types of software downloads available from Linaro:
- At the end of each monthly cycle Linaro release an integrated build including all the software worked on during the cycle. These images are available from Linaro.org/Downloads.
- There are monthly versions of upstream software, such as GCC or QEMU. These are downloads from places such as releases.linaro.org.
- Linaro maintains public staging trees of upstream code they are working on. For example the kernel and u-boot trees are kept on git.linaro.org.
All code developed within Linaro working groups is open source and therefore available under standard Open Source Initiative (OSI) license terms. For more details see Linaro Membership Rules and Linaro Articles of Association.
- McGlaun, Shane (2010-06-03). "IBM, Freescale, Samsung Form Linaro to Aid in Developing ARM-compatible Software". Dailytech.com. Retrieved 2012-07-22.
- Paul, Ryan (2010-06-04). "Linaro nonprofit aims to fight ARM Linux fragmentation: A group of hardware companies has formed a new nonprofit organization that …". Arstechnica.com. Retrieved 2012-07-22.
- "HSA Foundation".
- "Linaro seeks to simplify ARM Linux landscape". Lwn.net. 2010-06-09. Retrieved 2012-07-22.
- Linaro Limited (2011-05-27). "Linaro completes first year with demonstrations of Linaro Evaluation Builds for Android and Ubuntu and introduction of new partner program". Linaro.org. Retrieved 2012-07-22.
- Linaro Limited (2012-11-01). "Industry leaders-collaborate to accelerate software ecosystem for ARM servers and join Linaro". Linaro.org. Retrieved 2013-01-15.
- Linaro Limited (2013-02-20). "Networking Leaders Collaborate to Maximize Choice, Performance and Power Efficiency". Linaro.org. Retrieved 2013-01-15.
- Bennett, Jamie (2010-11-10). "Linaro 10.11 Final released". Retrieved 2013-12-02.
- Linaro Limited. "Linaro presentations and documents for download". Linaro.org. Retrieved 2012-07-22.