This layer provides support for Microchip microprocessors (aka AT91)
====================================================================

For more information about the Microchip MPU product line see:
http://www.microchip.com/design-centers/32-bit-mpus
Linux & Open Source on Microchip microprocessors:
http://www.linux4sam.org


Supported SoCs / MACHINE names
==============================
Note that most of the machine names below, have a SD Card variant that can be
built by adding an "-sd" suffix to the machine name.
- SAMA5D2 product family / sama5d2-xplained, sama5d2-xplained-emmc, sama5d27-som1-ek-sd, sama5d2-ptc-ek, sama5d2-icp, sama5d27-wlsom1-ek-sd
- SAMA5D4 product family / sama5d4ek, sama5d4-xplained
- SAMA5D3 product family / sama5d3xek, sama5d3-xplained
- AT91SAM9x5 product family (AT91SAM9G15, AT91SAM9G25, AT91SAM9X25, AT91SAM9G35 and AT91SAM9X35) / at91sam9x5ek
- AT91SAM9RL / at91sam9rlek
- AT91SAM9G45 / at91sam9m10g45ek
- SAM9X60 / sam9x60ek
- SAMA7G5 / sama7g5ek-sd, sama7g5ek-emmc


Sources
=======
- meta-atmel
URI: git://github.com/linux4sam/meta-atmel.git
URI: https://github.com/linux4sam/meta-atmel.git
Branch: dunfell


Dependencies
============
This Layer depends on :
- poky
URI: git://git.yoctoproject.org/poky
Branch: dunfell
Tag: 861cfcd52f0b769772c3726530210f2f43c3449b

- meta-openembedded
URI: git://git.openembedded.org/meta-openembedded
URI: http://cgit.openembedded.org/meta-openembedded/
Branch: dunfell
Tag: f2d02cb71eaff8eb285a1997b30be52486c160ae

- meta-aws (for AWS Greengrass, mandatory for SAMA5D2 microchip-* images)
URI: git://github.com/aws/meta-aws.git
URI: https://github.com/aws/meta-aws
Branch: dunfell
Tag: e34ed15a87e36fa4199c63a184630fa370abac55

Build procedure
===============

0/ Create a directory
mkdir my_dir
cd my_dir

1/ Clone yocto/poky git repository with the proper branch ready
git clone git://git.yoctoproject.org/poky -b dunfell

2/ Clone meta-openembedded git repository with the proper branch ready
git clone git://git.openembedded.org/meta-openembedded -b dunfell

3/ Clone meta-aws git repository with the proper branch ready
git clone git://github.com/aws/meta-aws -b dunfell

4/ Clone meta-atmel layer with the proper branch ready
git clone git://github.com/linux4sam/meta-atmel.git -b dunfell

5/ Enter the poky directory to configure the build system and start the build process
cd poky

6/ Change TEMPLATECONF from .templateconf to:
export TEMPLATECONF=${TEMPLATECONF:-../meta-atmel/conf}
Note: If it's the first time you use Yocto Project templates, and if the
build-microchip directory remains from a previous use, we advice you start
from a fresh directory. Keep your build-microchip/conf/local.conf file for
reference.

7/ Initialize build directory
source oe-init-build-env build-microchip

8/ To build a small image provided by Yocto Project:
[MACHINE=<machine>] bitbake core-image-minimal

Example for sama5d2-xplained-sd SD card image:
MACHINE=sama5d2-xplained-sd bitbake core-image-minimal

9/ To build the microchip image with no graphics support:
[MACHINE=<machine>] bitbake microchip-headless-image

Example for sama5d2-xplained-sd SD card image:
MACHINE=sama5d2-xplained-sd bitbake microchip-headless-image

10/ To build the microchip image with graphics support (EGT):
[MACHINE=<machine>] bitbake microchip-graphics-image

Example for sama5d2-xplained-sd SD card image:
MACHINE=sama5d2-xplained-sd bitbake microchip-graphics-image

Typical bitbake output
======================
Build Configuration:
BB_VERSION           = "1.46.0"
BUILD_SYS            = "x86_64-linux"
NATIVELSBSTRING      = "universal"
TARGET_SYS           = "arm-poky-linux-gnueabi"
MACHINE              = "sama5d2-xplained-sd"
DISTRO               = "poky-atmel"
DISTRO_VERSION       = "3.1.4"
TUNE_FEATURES        = "arm vfp cortexa5 neon vfpv4 thumb callconvention-hard"
TARGET_FPU           = "hard"
meta
meta-poky
meta-yocto-bsp       = "dunfell:861cfcd52f0b769772c3726530210f2f43c3449b"
meta-oe
meta-networking
meta-python
meta-initramfs       = "dunfell:f2d02cb71eaff8eb285a1997b30be52486c160ae"
meta-atmel           = "dunfell:060a1d102176dbffdcd113d62585f728735811d3"
meta-multimedia      = "dunfell:f2d02cb71eaff8eb285a1997b30be52486c160ae"
meta-aws             = "dunfell:e34ed15a87e36fa4199c63a184630fa370abac55"


Contributing
============
To contribute to this layer you should submit the patches for review to:
the github pull-request facility directly or the forum. Anyway, don't forget to
Cc the maintainers.

AT91 Forum:
http://www.at91.com/discussions/

for some useful guidelines to be followed when submitting patches:
http://www.openembedded.org/wiki/How_to_submit_a_patch_to_OpenEmbedded

Maintainers:
Codrin Ciubotariu <[email protected]>
Nicolas Ferre <[email protected]>

When creating patches insert the [meta-atmel] tag in the subject, for example
use something like:
git format-patch -s --subject-prefix='meta-atmel][PATCH' <origin>