configs/toradex_apalis_imx6_defconfig: new board

Signed-off-by: Sergio Prado <sergio.prado@e-labworks.com>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>

board/toradex/apalis-imx6/genimage.cfg

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+# Minimal SD card image for the Toradex Apalis i.MX6 COM
+#
+# It does not need a boot section for a bootloader since it is booted
+# from its internal flash memory (eMMC).
+
+image sdcard.img {
+  hdimage {
+  }
+
+  partition rootfs {
+    partition-type = 0x83
+    image = "rootfs.ext2"
+    size = 512M
+  }
+}

board/toradex/apalis-imx6/post-image.sh

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+#!/usr/bin/env bash
+
+GENIMAGE_CFG="$(dirname $0)/genimage.cfg"
+GENIMAGE_TMP="${BUILD_DIR}/genimage.tmp"
+
+# copy the uEnv.txt to the output/images directory
+cp board/toradex/apalis-imx6/uEnv.txt $BINARIES_DIR/uEnv.txt
+
+rm -rf "${GENIMAGE_TMP}"
+
+# generate rootfs.img
+genimage \
+  --rootpath "${TARGET_DIR}" \
+  --tmppath "${GENIMAGE_TMP}" \
+  --inputpath "${BINARIES_DIR}" \
+  --outputpath "${BINARIES_DIR}" \
+  --config "${GENIMAGE_CFG}"
+
+RET=${?}
+exit ${RET}

board/toradex/apalis-imx6/readme.txt

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+Toradex Apalis i.MX6 Computer on Module
+
+Intro
+=====
+
+The Apalis iMX6 is a small form-factor Computer on Module that comes
+in both quad core and dual core versions based on Freescale i.MX6Q and
+Freescale i.MX6D SoCs respectively. The Cortex A9 quad core and dual
+core CPU peaks at 1 GHz for commercial temperature variant, while the
+industrial temperature variant has a peak frequency of 800 MHz.
+
+https://www.toradex.com/computer-on-modules/apalis-arm-family/freescale-imx-6
+
+It supports two carrier boards:
+
+Apalis Evaluation Board
+https://www.toradex.com/products/carrier-boards/apalis-evaluation-board
+
+Ixora Carrier Board
+https://www.toradex.com/products/carrier-boards/ixora-carrier-board
+
+How to build it
+===============
+
+Configure Buildroot:
+
+    $ make toradex_apalis_imx6_defconfig
+
+Compile everything and build the rootfs image:
+
+    $ make
+
+How to boot the image
+=====================
+
+The board only boots from its internal flash memory eMMC, so the
+bootloader image should be copied to it, following the procedures
+described in Toradex website.
+
+http://developer.toradex.com/knowledge-base/flashing-linux-on-imx6-modules
+
+Buildroot prepares a "sdcard.img" in output/images/ with the kernel
+image, device tree and a root filesystem, ready to be dumped on an SD
+card.
+
+    $ dd if=output/images/sdcard.img of=/dev/sdX bs=1M
+
+To boot from the SD card, you should change the U-Boot
+environment. Since U-Boot is running from internal eMMC, you will need
+to access its command line prompt and manually set the necessary
+variables to boot from the external SD card. For convenience, you can
+use uEnv.txt provided in output/images/ as a reference to create the
+necessary U-Boot variables to boot from the SD card.

board/toradex/apalis-imx6/uEnv.txt

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+boot_file=zImage
+fdt_file=imx6q-apalis_v1_0-ixora.dtb
+sdargs=ip=off root=/dev/mmcblk1p1 rw,noatime rootfstype=ext4 rootwait
+sddtbload=ext2load mmc 2:1 ${fdt_addr_r} boot/${fdt_file}
+sdkernelload=ext2load mmc 2:1 ${kernel_addr_r} boot/${boot_file}
+bootcmd=run setup; setenv bootargs ${defargs} ${sdargs} ${setupargs} ${vidargs}; echo Booting from SD card...; run sddtbload; run sdkernelload; bootz ${kernel_addr_r} - ${fdt_addr_r}

configs/toradex_apalis_imx6_defconfig

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+BR2_arm=y
+BR2_cortex_a9=y
+BR2_PACKAGE_HOST_LINUX_HEADERS_CUSTOM_3_14=y
+BR2_TARGET_GENERIC_GETTY_PORT="ttymxc0"
+BR2_ROOTFS_POST_IMAGE_SCRIPT="board/toradex/apalis-imx6/post-image.sh"
+BR2_LINUX_KERNEL=y
+BR2_LINUX_KERNEL_CUSTOM_GIT=y
+BR2_LINUX_KERNEL_CUSTOM_REPO_URL="git://git.toradex.com/linux-toradex.git"
+BR2_LINUX_KERNEL_CUSTOM_REPO_VERSION="8f237ebe42f2cb911245369276a6b3043c2815f2"
+BR2_LINUX_KERNEL_DEFCONFIG="apalis_imx6"
+BR2_LINUX_KERNEL_DTS_SUPPORT=y
+BR2_LINUX_KERNEL_INTREE_DTS_NAME="imx6q-apalis-eval imx6q-apalis-ixora imx6q-apalis_v1_0-eval imx6q-apalis_v1_0-ixora"
+BR2_LINUX_KERNEL_INSTALL_TARGET=y
+BR2_TARGET_ROOTFS_EXT2=y
+BR2_TARGET_ROOTFS_EXT2_4=y
+BR2_TARGET_UBOOT=y
+BR2_TARGET_UBOOT_BUILD_SYSTEM_KCONFIG=y
+BR2_TARGET_UBOOT_CUSTOM_GIT=y
+BR2_TARGET_UBOOT_CUSTOM_REPO_URL="git://git.toradex.com/u-boot-toradex.git"
+BR2_TARGET_UBOOT_CUSTOM_REPO_VERSION="1ef4a29e8cea0239411dde64f9617ad76248fd02"
+BR2_TARGET_UBOOT_BOARD_DEFCONFIG="apalis_imx6"
+BR2_TARGET_UBOOT_FORMAT_CUSTOM=y
+BR2_TARGET_UBOOT_FORMAT_CUSTOM_NAME="u-boot.imx"
+BR2_PACKAGE_HOST_GENIMAGE=y