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authorGravatar Gergely Imreh <imrehg@gmail.com>2015-05-05 15:59:30 +0800
committerGravatar Peter Korsgaard <peter@korsgaard.com>2015-05-07 23:10:46 +0200
commit731b2257fe9b42c4572f7a71547c52c3b5843840 (patch)
tree558385d3251332b6764be62046a97de5228e3d23 /board
parent7b84f2c36b28178974719565aa00862c037c2d3e (diff)
downloadbuildroot-731b2257fe9b42c4572f7a71547c52c3b5843840.tar.gz
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board: add support for VIA VAB-820/AMOS-820
The VIA VAB-820 board (and the AMOS-820 system built around it) is based on Freescale i.MX6 for embedded and industrial computing. Signed-off-by: Gergely Imreh <imrehg@gmail.com> Signed-off-by: Peter Korsgaard <peter@korsgaard.com>
Diffstat (limited to 'board')
-rw-r--r--board/via/imx6_vab820/patches/uboot/default-to-boot-from-the-SD-card.patch25
-rw-r--r--board/via/imx6_vab820/readme.txt107
2 files changed, 132 insertions, 0 deletions
diff --git a/board/via/imx6_vab820/patches/uboot/default-to-boot-from-the-SD-card.patch b/board/via/imx6_vab820/patches/uboot/default-to-boot-from-the-SD-card.patch
new file mode 100644
index 0000000000..9b219f7cef
--- /dev/null
+++ b/board/via/imx6_vab820/patches/uboot/default-to-boot-from-the-SD-card.patch
@@ -0,0 +1,25 @@
+From 6e72bef18c928753c9861c1f6fc8c2c4dd5d1e97 Mon Sep 17 00:00:00 2001
+From: Gergely Imreh <imrehg@gmail.com>
+Date: Thu, 30 Apr 2015 16:24:38 +0800
+Subject: [PATCH] default to boot from the SD card
+
+---
+ include/configs/mx6qvab820_common.h | 2 +-
+ 1 file changed, 1 insertion(+), 1 deletion(-)
+
+diff --git a/include/configs/mx6qvab820_common.h b/include/configs/mx6qvab820_common.h
+index 99bc8a9..2e70c94 100644
+--- a/include/configs/mx6qvab820_common.h
++++ b/include/configs/mx6qvab820_common.h
+@@ -216,7 +216,7 @@
+ "bootcmd_mmc=setenv mmcdev 1; setenv rootdev 0; setenv mmcname mmc; run bootcmd_main;\0"
+
+ #define CONFIG_BOOTCOMMAND \
+- "run bootcmd_mmc"
++ "run bootcmd_sd"
+
+ #define CONFIG_ARP_TIMEOUT 200UL
+
+--
+2.3.7
+
diff --git a/board/via/imx6_vab820/readme.txt b/board/via/imx6_vab820/readme.txt
new file mode 100644
index 0000000000..7345e5ded7
--- /dev/null
+++ b/board/via/imx6_vab820/readme.txt
@@ -0,0 +1,107 @@
+VIA VAB-820/AMOS-820
+====================
+
+This file documents the Buildroot support for the VIA VAB-820 board and
+VIA AMOS-820 system, which are built around a Freescale i.MX6 Quad/Dual SoC.
+The kernel and u-boot is based on the official VIA BSP, which is in turn
+based on the Freescale Linux 3.10.17_1.0.0_ga BSP.
+
+
+Configuring and building Buildroot
+----------------------------------
+
+Start from the defconfig:
+
+ $ make via_imx6_vab820_defconfig
+
+You can edit build options the usual way:
+
+ $ make menuconfig
+
+When you are happy with the setup, run:
+
+ $ make
+
+The result of the build with the default settings should be these files:
+
+ output/images
+ ├── imx6q-vab820.dtb
+ ├── rootfs.tar
+ ├── u-boot.imx
+ └── uImage
+
+
+Set up your SD card
+-------------------
+
+*Important*: pay attention which partition you are modifying so you don't
+accidentally erase the wrong file system, e.g your host computer or your
+external storage!
+
+In the default setup you need to create 2 partitions on your SD card:
+a boot partition and a root partition. In this guide and in the default u-boot
+settings the boot partition is vfat, while the root partition is ext4.
+
+You also need to leave space for u-boot at the beginning of the card, before
+all the partitions.
+
+For example, if your SD card is at /dev/sdX, using fdisk, and starting from
+an empty card, the steps are along these lines:
+
+ # fdisk /dev/sdX
+ n (new partition)
+ p (primary partition)
+ 1 (first partition)
+ <return> (default first sector, should be at least 1MB from the beginning
+ which is 2048 sectors if the sector size is 512KB)
+ +50M (50MB size, as an example)
+ t (switch partition type)
+ b (select "W95 FAT32" type)
+ n (the second partition)
+ p (primary partition)
+ 2 (second partition)
+ <return> (default first sector)
+ <return> (use all remaining space)
+ p (print so the partition looks something like this below)
+ Device Boot Start End Sectors Size Id Type
+ /dev/sdX1 2048 104447 102400 50M b W95 FAT32
+ /dev/sdX2 104448 15564799 15460352 7.4G 83 Linux
+ w (save changes)
+
+After this you need to format the newly created file system:
+
+ # mkfs.vfat -L boot /dev/sdX1
+ # mkfs.ext4 -L rootfs /dev/sdX2
+
+Now the system can be copied onto the card. First copy the u-boot onto
+the region of the card before the first partition (starting from the
+root directory of buildroot):
+
+ # dd if=output/images/u-boot.imx of=/dev/sdX bs=512 seek=2
+
+Mount the first partition /dev/sdX1, and copy the kernel and the
+compiled device tree:
+
+ # cp output/images/uImage /mnt/<BOOT-PARTITION>
+ # cp output/images/imx6q-vab820.dtb /mnt/<BOOT-PARTITION>
+
+Finally, copy the root file system onto the mounted (empty) /dev/sdX2
+rootfs partition:
+
+ # tar xf output/images/rootfs.tar -C /mnt/<ROOTFS-PARTITION>
+
+
+Booting
+-------
+
+To use the on-card u-boot, you need adjust jumper J11 located just next to
+the SD card slot on the VAB-820 board. The correct position for SD card
+boot is jumping the two pins towards the inside of the board.
+
+To modify the default boot parameters compiled into u-boot, you can create
+a boot script with the file name `boot.scr` and place it onto the boot
+partition (same directory as `uImage`).
+
+If you want to have the login prompt on the serial debug line instead of
+the console, adjust the buildroot settings as:
+"System Configuration > getty options > TTY port > ttymxc1"