update buildroot to 2017.02.11

bsp/buildroot-2017.02.11/board/lego/ev3/genimage.cfg

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+# LEGO MINDSTORMS EV3 can boot from a 16MB flash or from a microSD card.
+# The U-Boot bootloader from the flash is always used, even when booting
+# from a microSD card.
+
+# The Flash image
+
+flash nor-16M-256 {
+	pebsize = 4096
+	numpebs = 4096
+	minimum-io-unit-size = 256
+}
+
+image flash.bin {
+	flash {
+	}
+	flashtype = "nor-16M-256"
+	partition uboot {
+		image = "u-boot.bin"
+		size = 320K
+	}
+	partition uimage {
+		image = "uImage"
+		size = 3M
+		offset = 0x50000
+	}
+	partition rootfs {
+		image = "rootfs.squashfs"
+		size = 9600K
+		offset = 0x350000
+	}
+}
+
+# The SD card image
+
+image boot.vfat {
+	vfat {
+		files = {
+			"uImage"
+		}
+	}
+	size = 16M
+}
+
+image sdcard.img {
+	hdimage {
+	}
+	partition boot {
+		partition-type = 0xC
+		bootable = "true"
+		image = "boot.vfat"
+		offset = 4M
+	}
+	partition rootfs {
+		partition-type = 0x83
+		image = "rootfs.ext2"
+	}
+}

bsp/buildroot-2017.02.11/board/lego/ev3/linux.fragment

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+CONFIG_BLK_DEV_RAM=y
+CONFIG_BLK_DEV_RAM_COUNT=1
+CONFIG_BLK_DEV_RAM_SIZE=32768
+CONFIG_SQUASHFS=y
+CONFIG_SQUASHFS_LZ4=y
+CONFIG_SQUASHFS_LZO=y
+CONFIG_SQUASHFS_XZ=y

bsp/buildroot-2017.02.11/board/lego/ev3/post-image.sh

@@ -0,0 +1,14 @@
+#!/bin/sh
+
+BOARD_DIR="$(dirname $0)"
+GENIMAGE_CFG="${BOARD_DIR}/genimage.cfg"
+GENIMAGE_TMP="${BUILD_DIR}/genimage.tmp"
+
+rm -rf "${GENIMAGE_TMP}"
+
+genimage \
+  --rootpath "${TARGET_DIR}" \
+  --tmppath "${GENIMAGE_TMP}" \
+  --inputpath "${BINARIES_DIR}" \
+  --outputpath "${BINARIES_DIR}" \
+  --config "${GENIMAGE_CFG}"

bsp/buildroot-2017.02.11/board/lego/ev3/readme.txt

@@ -0,0 +1,87 @@
+Lego Mindstorms EV3
+
+Intro
+=====
+
+This is the buildroot basic board support for the Lego Mindstorms EV3
+programmable brick.
+
+The Lego Mindstorms EV3 brick comprises a Texas Instruments AM1808 SoC, with
+an ARM 926EJ-S main processor running at 300 MHz.
+See:
+- https://en.wikipedia.org/wiki/Lego_Mindstorms_EV3
+- http://www.lego.com/en-us/mindstorms/products/ev3/31313-mindstorms-ev3/
+- http://www.ti.com/product/am1808
+
+The buildroot configuration uses the Linux kernel of the ev3dev project.
+See:
+- https://github.com/ev3dev/ev3-kernel/
+- https://github.com/ev3dev/lego-linux-drivers/
+- http://www.ev3dev.org/
+
+How it works
+============
+
+Boot process :
+--------------
+
+The EV3 boots from an EEPROM. This loads whatever is on the built-in 16MB flash
+(usually U-Boot) and runs it. The U-Boot from the official LEGO firmware and
+mainline U-Boot will attempt to boot a Linux kernel from the external µSD card.
+It will try to load a uImage (and optional boot.scr) from the first µSD card
+partition, which must be formatted with a FAT filesystem. If no µSD is found or
+it does not contain a uImage file, then the EV3 will boot the uImage from the
+built-in 16MB flash.
+
+How to build it
+===============
+
+Configure Buildroot
+-------------------
+
+The lego_ev3_defconfig configuration provides basic support to boot on the Lego
+Mindstorms EV3 programmable brick:
+
+  $ make lego_ev3_defconfig
+
+Build everything
+----------------
+
+Note: you will need to have access to the network, since Buildroot will
+download the packages' sources.
+
+  $ make
+
+Result of the build
+-------------------
+
+After building, you should obtain this tree:
+
+    output/images/
+    ├── boot.vfat
+    ├── flash.bin
+    ├── rootfs.ext2
+    ├── rootfs.ext3 -> rootfs.ext2
+    ├── rootfs.squashfs
+    ├── sdcard.img
+    ├── u-boot.bin
+    └── uImage
+
+Installation
+============
+
+You can use either flash.bin or the sdcard.img. To load flash.bin, use the
+official Lego Mindstorms EV3 programming software firmware update tool to load
+the image. To use sdcard.img, use a disk writing tool such as Etcher or dd to
+write the image to the µSD card.
+
+Finish
+======
+
+To have a serial console, you will need a proper USB to Lego serial port
+adapter plugged into the EV3 sensors port 1.
+See:
+- http://botbench.com/blog/2013/08/15/ev3-creating-console-cable/
+- http://botbench.com/blog/2013/08/05/mindsensors-ev3-usb-console-adapter/
+
+The serial port config to use is 115200/8-N-1.