[Buildroot] [PATCH v2 1/1] board: add support for RIoTboard

[Nikolay Dimitrov]

This is a small development board, based on Freescale IMX6 Solo SoC
(single core ARM Cortex-A9). The board has excellent support in mainline
U-Boot and Linux.

Signed-off-by: Nikolay Dimitrov <picmaster at mail.bg>
---
Changes v1 -> v2:
  - added support for extlinux, as required by U-Boot 2015.01
  - fixed some typos

 board/embest/riotboard/extlinux.conf |    6 ++++
 board/embest/riotboard/readme.txt    |   55 ++++++++++++++++++++++++++++++++++
 configs/riotboard_defconfig          |   30 +++++++++++++++++++
 3 files changed, 91 insertions(+)
 create mode 100644 board/embest/riotboard/extlinux.conf
 create mode 100644 board/embest/riotboard/readme.txt
 create mode 100644 configs/riotboard_defconfig

diff --git a/board/embest/riotboard/extlinux.conf b/board/embest/riotboard/extlinux.conf
new file mode 100644
index 0000000..eadb3f3
--- /dev/null
+++ b/board/embest/riotboard/extlinux.conf
@@ -0,0 +1,6 @@
+default buildroot
+
+label buildroot
+kernel /boot/uImage
+devicetree /boot/imx6dl-riotboard.dtb
+append console=ttymxc1,115200 root=/dev/mmcblk0p2 rw
diff --git a/board/embest/riotboard/readme.txt b/board/embest/riotboard/readme.txt
new file mode 100644
index 0000000..fc1efec
--- /dev/null
+++ b/board/embest/riotboard/readme.txt
@@ -0,0 +1,55 @@
+Buildroot for Embest RIoTboard
+==============================
+
+1. Compiling buildroot
+----------------------
+make distclean
+make riotboard_defconfig
+make
+
+2. Installing buildroot
+-----------------------
+Prepare an SD-card and plug it into your card reader. Write the bootloader to
+your SD-card:
+
+sudo dd if=output/images/u-boot.imx of=/dev/sdX bs=1k seek=1
+
+Create 2 partitions on the SD-card using your favourite tool. Partition 1
+should be around 32MiB, partition 2 should be big enough to hold your rootfs,
+for example 128MiB. Here's how an example of such partition layout:
+
+   Device Boot      Start         End      Blocks   Id  System
+/dev/sdX1            2048       67583       32768   83  Linux
+/dev/sdX2           67584      329727      131072   83  Linux
+
+Format these SD-card partitions with your favourite filesystem:
+
+sudo mkfs.ext2 /dev/sdX1
+sudo mkfs.ext2 /dev/sdX2
+
+Copy the kernel, device tree and extlinux configuration to SD-card partition 1:
+
+sudo mkdir /mnt/sdcard/
+sudo mount /dev/sdX1 /mnt/sdcard/
+sudo mkdir -p /mnt/sdcard/boot/extlinux/
+sudo cp -v board/embest/riotboard/extlinux.conf /mnt/sdcard/boot/extlinux/
+sudo cp -v uImage /mnt/sdcard/boot/
+sudo cp -v imx6dl-riotboard.dtb /mnt/sdcard/boot/
+sudo umount /dev/sdX1
+
+Then deploy your rootfs on SD-card partition 2:
+
+sudo mount /dev/sdX2 /mnt/sdcard/
+sudo tar xf rootfs.tar -C /mnt/sdcard/
+sudo umount /dev/sdX2
+
+3. Running buildroot
+--------------------
+Position the board so you can read the label "RIoTboard" on the right side of
+SW1 DIP switches. Configure the SW1 swiches like this:
+
+10100101 (1 means ON position, 0 means OFF position)
+
+Now plug your prepared SD-card in slot J6. Connect a serial console (115200, 8,
+N, 1) to header J18. Connect a 5V/1A power supply to the board and enjoy your
+new toy.
diff --git a/configs/riotboard_defconfig b/configs/riotboard_defconfig
new file mode 100644
index 0000000..ebcee69
--- /dev/null
+++ b/configs/riotboard_defconfig
@@ -0,0 +1,30 @@
+# architecture
+BR2_arm=y
+BR2_cortex_a9=y
+
+# system
+BR2_TARGET_GENERIC_GETTY=y
+BR2_TARGET_GENERIC_GETTY_PORT="ttymxc1"
+
+# toolchain
+BR2_TOOLCHAIN_BUILDROOT_LARGEFILE=y
+
+# rootfs
+BR2_TARGET_ROOTFS_EXT2=y
+BR2_TARGET_ROOTFS_EXT2_2r1=y
+
+# bootloader
+BR2_TARGET_UBOOT=y
+BR2_TARGET_UBOOT_VERSION="2015.01"
+BR2_TARGET_UBOOT_BOARDNAME="riotboard"
+BR2_TARGET_UBOOT_FORMAT_IMX=y
+
+# kernel headers
+BR2_KERNEL_HEADERS_3_18=y
+
+# kernel
+BR2_LINUX_KERNEL=y
+BR2_LINUX_KERNEL_DEFCONFIG="imx_v6_v7"
+BR2_LINUX_KERNEL_UIMAGE_LOADADDR="0x10008000"
+BR2_LINUX_KERNEL_DTS_SUPPORT=y
+BR2_LINUX_KERNEL_INTREE_DTS_NAME="imx6dl-riotboard"
-- 
1.7.10.4