Merge from bittboy/buildroot@db180c0

board/olimex/a20_olinuxino/readme.txt

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+A20-OLinuXino-LIME and A20-OLinuXino-MICRO
+
+Intro
+=====
+
+These are open hardware boards, all based on the Allwinner A20 SoC.
+
+for more details about the boards see the following pages:
+ - https://www.olimex.com/Products/OLinuXino/open-source-hardware
+ - https://www.olimex.com/Products/OLinuXino/A20/A20-OLinuXino-MICRO/
+ - https://www.olimex.com/Products/OLinuXino/A20/A20-OLinuXino-LIME/
+ - https://www.olimex.com/Products/OLinuXino/A20/A20-OLinuXino-LIME2/
+
+The following defconfigs are available:
+ - olimex_a20_olinuxino_micro_defconfig
+   for the A20-OLinuXino-MICRO board using mainline kernel
+ - olimex_a20_olinuxino_lime_defconfig
+   for the A20-OLinuXino-LIME board using mainline kernel
+ - olimex_a20_olinuxino_lime2_defconfig
+   for the A20-OLinuXino-LIME2 board using mainline kernel
+
+The Mainline Kernel is already a much better choice for a headless server.
+And also the mainline kernel works fine even for a basic Linux desktop
+system running on top of a simple framebuffer, which may be good enough for
+the users who do not need fancy 3D graphics or video playback acceleration.
+
+(see http://linux-sunxi.org/Linux_Kernel for more details)
+
+How to build it
+===============
+
+Configure Buildroot:
+
+    $ make <board>_defconfig
+
+Compile everything and build the rootfs image:
+
+    $ make
+
+Result of the build
+-------------------
+
+After building, you should get a tree like this:
+
+    output/images/
+    +-- rootfs.ext2
+    +-- rootfs.ext4 -> rootfs.ext2
+    +-- sdcard.img
+    +-- sun7i-a20-olinuxino-lime.dtb (lime, mainline)
+    +-- sun7i-a20-olinuxino-lime2.dtb (lime2, mainline)
+    +-- sun7i-a20-olinuxino-micro.dtb (micro, mainline)
+    +-- u-boot.bin
+    +-- u-boot-sunxi-with-spl.bin
+    `-- zImage
+
+
+How to write the SD card
+========================
+
+The sdcard.img file is a complete bootable image ready to be written
+on the boot medium. To install it, simply copy the image to a uSD
+card:
+
+    # dd if=output/images/sdcard.img of=/dev/sdX
+
+Where 'sdX' is the device node of the uSD.
+
+Eject the SD card, insert it in the A20-OLinuXino board, and power it up.
+