Merge from bittboy/buildroot@db180c0

board/grinn/liteboard/genimage.cfg

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+# Minimal microSD card image for Grinn's liteBoard
+#
+# We mimic the .sdcard Freescale's image format for i.MX6UL:
+# * the microSD card must have 1 kB free space at the beginning,
+# * SPL is dumped as is,
+# * U-Boot is dumped at 69K offset, as configured in SPL
+# * a FAT partition at offset 8 MB is containing zImage and dtbs,
+# * a single root filesystem partition is required (Ext4 in this case).
+#
+
+image boot.vfat {
+  vfat {
+    files = {
+      "imx6ul-liteboard.dtb",
+      "zImage"
+    }
+  }
+  size = 16M
+}
+
+image sdcard.img {
+  hdimage {
+  }
+
+  partition SPL {
+    in-partition-table = "no"
+    image = "SPL"
+    offset = 1K
+  }
+
+  partition u-boot {
+    in-partition-table = "no"
+    image = "u-boot.img"
+    offset = 69K
+  }
+
+  partition boot {
+    partition-type = 0xC
+    bootable = "true"
+    image = "boot.vfat"
+    offset = 8M
+  }
+
+  partition rootfs {
+    partition-type = 0x83
+    image = "rootfs.ext4"
+  }
+}

board/grinn/liteboard/post-image.sh

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+#!/usr/bin/env bash
+
+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}"

board/grinn/liteboard/readme.txt

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+*********
+liteBoard
+*********
+
+Build
+=====
+
+First, configure Buildroot for your liteBoard:
+
+  make grinn_liteboard_defconfig
+
+Build image:
+
+  make
+
+After building you should get a tree like this:
+
+  output/images/
+  ├── boot.vfat
+  ├── imx6ul-liteboard.dtb
+  ├── rootfs.ext2
+  ├── rootfs.ext4
+  ├── rootfs.tar
+  ├── sdcard.img
+  ├── u-boot.imx
+  └── zImage
+
+Create a bootable microSD card
+==============================
+
+Buildroot prepares a bootable microSD card image "sdcard.img" in output/images/
+directory, To flash SD card just run the following command:
+
+  sudo dd if=output/images/sdcard.img of=/dev/<sd_card> bs=1M
+
+where <sd_card> can be sdX or mmcblkX
+
+*** WARNING! This will destroy all contents of device you specify! ***
+
+Boot liteBoard
+==============
+
+- insert the microSD card in the microSD slot of the board;
+- plug micro USB cable to provide power and console interface
+- use terminal emulator with 115200 bps, 8n1