[Buildroot] [PATCH v8 2/2] Add defconfig for MIPS Creator ci40

Tue Apr 18 11:42:33 UTC 2017

 Hi Abhimanyu,

 I have a few tiny improvement suggestions still, but it looks good already so
on your next iteration (with the improved genimage.sh) you can add my

Acked-by: Arnout Vandecappelle (Essensium/Mind) <arnout at mind.be>

On 16-04-17 19:40, Abhimanyu Vishwakarma wrote:
> From: Abhimanyu Vishwakarma <Abhimanyu.V at gmail.com>
> 
> Signed-off-by: Abhimanyu Vishwakarma <Abhimanyu.V at gmail.com>

[snip]
> diff --git a/board/ci40/post-build.sh b/board/ci40/post-build.sh
> new file mode 100755
> index 000000000..978ced585
> --- /dev/null
> +++ b/board/ci40/post-build.sh
> @@ -0,0 +1,4 @@
> +#!/bin/bash

 It's a bit of a personal preference: when the script doesn't rely on bashisms,
I prefer to use /bin/sh instead of /bin/bash.

> +
> +# Copy to target
> +cp ${BINARIES_DIR}/vmlinux.gz.itb ${TARGET_DIR}/fitImage
> diff --git a/board/ci40/readme.txt b/board/ci40/readme.txt
> new file mode 100644
> index 000000000..9d399c850
> --- /dev/null
> +++ b/board/ci40/readme.txt
> @@ -0,0 +1,64 @@
> +*********************
> +* MIPS Creator CI40 *
> +*********************
> +
> +This document details how to build and run a Buildroot system on the
> +MIPS Creator CI40 platform. For more details about the CI40, see
> +https://creatordev.io/ci40-iot-hub.html.
> +
> +How to build
> +------------
> +
> +$ make ci40_defconfig
> +$ make
> +
> +Prepare USB/MMC for boot
> +------------------------
> +
> +On successful build, "sdcard.img" file will be created in 'output/images'
> +folder.
> +
> +Use following command to write image to bootable device
> +
> +# dd if=./output/images/sdcard.img of=/dev/<your-microsd-or-usb-device>

 You could add here something like:

You usually have to be root to be allowed to do this

of just put sudo in front of the command line example (and start it with $
instead of #, of course).

> +
> +Booting from USB/MMC
> +--------------------
> +
> +The boot loader is already present in NOR flash. To boot your newly generated
> +Linux and root filesystem, you need to interrupt U-Boot autoboot. Current
> +U-Boot is configured with 2 seconds of boot-delay, after expiry of this
> +boot-delay timeout U-Boot starts booting the default image. To interrupt
> +autoboot, press any key before the boot-delay time expires, U-Boot will
> +stop the autoboot process and give a U-Boot prompt. You can now boot to
> +your preferred boot method as describe below:

 A little bit verbose, but very clear!

> +
> +From USB
> +  pistachio # run usbboot
> +
> +From SD-Card
> +  pistachio # run mmcboot
> +
> +Persistent boot command
> +-----------------------
> +
> +To boot automatically to your preferred boot method, use following command to
> +make it persistent, for example to automatically boot to usb:
> +
> +  pistachio # setenv bootcmd run usbboot
> +  pistachio # saveenv
> +
> +Flash new bootloader
> +--------------------
> +
> +Bootloader image will be available in 'output/images' folder.
> +Use following command to flash new bootloader:
> +
> +# flashcp -v u-boot-pistachio_marduk-<version>.img /dev/mtd0

 Although you were asked before to make this section shorter, I think it's a
little bit too terse now. How about

The bootloader image will be available in the 'output/images' folder. To flash
the new bootloader, copy it to the device and use the following command on the
device:

# flashcp -v u-boot-pistachio_marduk-<version>.img /dev/mtd0

> +
> +Online docs
> +-----------
> +
> +Mostly for OpenWRT but it is applicable to Buildroot
> +https://docs.creatordev.io/ci40/guides/openwrt-platform/#overview
> +
> diff --git a/configs/ci40_defconfig b/configs/ci40_defconfig
> new file mode 100644
> index 000000000..2ea3afe47
> --- /dev/null
> +++ b/configs/ci40_defconfig
> @@ -0,0 +1,48 @@
> +# architecture
> +BR2_mipsel=y
> +BR2_mips_32r2=y

 Perhaps it would make sense to add an explicit

BR2_MIPS_SOFT_FLOAT=y

? Although we don't do this for any of the other MIPSes and I doubt we'll change
the default any time soon for 32-bit MIPS.

 Regards,
 Arnout

> +
> +# linux header same as custom kernel ie 4.4.x
> +BR2_PACKAGE_HOST_LINUX_HEADERS_CUSTOM_4_4=y
> +
> +# kernel
> +BR2_LINUX_KERNEL=y
> +BR2_LINUX_KERNEL_CUSTOM_TARBALL=y
> +BR2_LINUX_KERNEL_CUSTOM_TARBALL_LOCATION="$(call github,CreatorDev,linux,openwrt-4.4.14)/linux-openwrt-4.4.14.tar.gz"
> +BR2_LINUX_KERNEL_DEFCONFIG="pistachio"
> +BR2_LINUX_KERNEL_IMAGE_TARGET_CUSTOM=y
> +# vmlinux.gz.itb image includes img/pistachio_marduk device tree
> +BR2_LINUX_KERNEL_IMAGE_TARGET_NAME="vmlinux.gz.itb"
> +
> +# bootloader flash support
> +BR2_PACKAGE_MTD=y
> +
> +# wireless firmware
> +BR2_PACKAGE_UCCP420WLAN=y
> +
> +# wireless package
> +BR2_PACKAGE_WIRELESS_TOOLS=y
> +BR2_PACKAGE_WPA_SUPPLICANT=y
> +BR2_PACKAGE_WPA_SUPPLICANT_PASSPHRASE=y
> +
> +# bootloader
> +BR2_TARGET_UBOOT=y
> +BR2_TARGET_UBOOT_BUILD_SYSTEM_KCONFIG=y
> +BR2_TARGET_UBOOT_BOARD_DEFCONFIG="pistachio_marduk"
> +BR2_TARGET_UBOOT_CUSTOM_TARBALL=y
> +BR2_TARGET_UBOOT_CUSTOM_TARBALL_LOCATION="$(call github,CreatorDev,u-boot,v1.0.5)/u-boot-CreatorDev-v1.0.5.tar.gz"
> +BR2_TARGET_UBOOT_FORMAT_CUSTOM=y
> +BR2_TARGET_UBOOT_FORMAT_CUSTOM_NAME="u-boot-pistachio_marduk-2015.10-v1.0.5.img"
> +
> +# fitimage / image generation
> +BR2_PACKAGE_HOST_UBOOT_TOOLS=y
> +BR2_PACKAGE_HOST_UBOOT_TOOLS_FIT_SUPPORT=y
> +BR2_PACKAGE_HOST_UBOOT_TOOLS_FIT_SIGNATURE_SUPPORT=y
> +BR2_ROOTFS_POST_BUILD_SCRIPT="board/ci40/post-build.sh"
> +
> +# image generation
> +BR2_TARGET_ROOTFS_EXT2=y
> +BR2_TARGET_ROOTFS_EXT2_4=y
> +BR2_PACKAGE_HOST_GENIMAGE=y
> +BR2_ROOTFS_POST_IMAGE_SCRIPT="support/scripts/genimage.sh"
> +BR2_ROOTFS_POST_SCRIPT_ARGS="-c board/ci40/genimage.cfg"
> 

-- 
Arnout Vandecappelle                          arnout at mind be
Senior Embedded Software Architect            +32-16-286500
Essensium/Mind                                http://www.mind.be
G.Geenslaan 9, 3001 Leuven, Belgium           BE 872 984 063 RPR Leuven
LinkedIn profile: http://www.linkedin.com/in/arnoutvandecappelle
GPG fingerprint:  7493 020B C7E3 8618 8DEC 222C 82EB F404 F9AC 0DDF