[Buildroot] [PATCH v4 1/1] board: add support for WarPboard

[Arthur LAMBERT <lambertarthur22@gmail.com>]

Le Wednesday 01 Jul 2015 ? 15:30:04 (+0200), Thomas Petazzoni a ?crit :
> Arthur,
> 
> On Wed,  1 Jul 2015 11:22:42 +0200, Arthur LAMBERT wrote:
> 
> > +- Put warpboard in USB download mode
> > +  closing the jumper j2  on daugther board
> > +- Load u-boot.imx in warpboard by using imx usb loader from host utility
> > +  $ ./imx_usb output/images/u-boot.imx
> 
> Can you confirm that:
> 
> $ output/host/usr/bin/imx_usb output/images/u-boot.imx

Just need to add -c + configuration directory :
$ output/host/usr/bin/imx_usb -c output/host/etc/imx-loader.d/ output/images/u-boot.imx

During my test I was testing the process from :
output/build/host-imx-usb-loader-f96aee286ea17c832b7ec922dd76842deb5ce299
In this directory you can find binary and configuration file. In you use a
relative path, you have to add and extra option to give configuration directory
path.

> 
> > +- Uboot will appear in minicom
> > +- Use the default environment variables:
> > + => env default -f -a
> > + => saveenv
> > +- run the DFU command in uboot prompt:
> > + => dfu 0 mmc 0
> > +- transfer uboot into flash by running this command in host side:
> 
> and:
> 
> > + $ sudo dfu-util -D output/images/u-boot.imx -a boot
> 
> $ sudo output/host/usr/bin/dfu-util -D output/images/u-boot.imx -a boot
> 
> is OK ?
> 
> This makes it clear which dfu_util and imx_usb programs should be
> executed.
> 

It's OK !

> > +Use ums command from uboot prompt to mount emmc as mass storage and update
> > +zImage, device tree (imx6sl-warp.dtb) and rootfs file (rootfs.tar)
> > +=> ums 0 mmc 0
> > +
> > +Put zimage and dtb file in warp-vfat and extract rootfs.tar in warp-rootfs
> > +partition.
> 
> Maybe indicate it should be extracted as root.
> 

Ok.

> > diff --git a/configs/warpboard_defconfig b/configs/warpboard_defconfig
> > new file mode 100644
> > index 0000000..13e90cd
> > --- /dev/null
> > +++ b/configs/warpboard_defconfig
> > @@ -0,0 +1,42 @@
> > +# architecture
> > +BR2_arm=y
> > +BR2_cortex_a9=y
> > +
> > +# patches
> > +BR2_GLOBAL_PATCH_DIR="board/freescale/warpboard/patches/"
> > +
> > +# lock to 4.0 headers to avoid breaking with newer kernels
> > +BR2_KERNEL_HEADERS_VERSION=y
> > +BR2_DEFAULT_KERNEL_VERSION="4.0"
> > +BR2_PACKAGE_HOST_LINUX_HEADERS_CUSTOM_4_0=y
> > +
> > +# system
> > +BR2_TARGET_GENERIC_HOSTNAME="warpboard"
> > +BR2_TARGET_GENERIC_GETTY_PORT="ttymxc0"
> > +
> > +# rootfs overlay
> > +BR2_ROOTFS_OVERLAY="board/freescale/warpboard/rootfs_overlay"
> > +
> > +# kernel
> > +BR2_LINUX_KERNEL=y
> > +BR2_LINUX_KERNEL_CUSTOM_TARBALL=y
> > +BR2_LINUX_KERNEL_CUSTOM_TARBALL_LOCATION="http://github.com/Freescale/linux-fslc/tarball/38ec11d/linux-fslc-38ec11d.tar.gz"
> > +BR2_LINUX_KERNEL_DEFCONFIG="imx_v6_v7"
> > +BR2_LINUX_KERNEL_ZIMAGE=y
> > +BR2_LINUX_KERNEL_DTS_SUPPORT=y
> > +BR2_LINUX_KERNEL_INTREE_DTS_NAME="imx6sl-warp"
> > +
> > +# wifi firmware for brcm4330
> > +BR2_PACKAGE_LINUX_FIRMWARE=y
> > +BR2_PACKAGE_LINUX_FIRMWARE_BRCM_BCM43XX=y
> > +
> > +# uboot
> > +BR2_TARGET_UBOOT=y
> > +BR2_TARGET_UBOOT_BOARDNAME="warp"
> > +BR2_TARGET_UBOOT_CUSTOM_VERSION=y
> > +BR2_TARGET_UBOOT_CUSTOM_VERSION_VALUE="2015.07-rc2"
> > +BR2_TARGET_UBOOT_FORMAT_IMX=y
> > +
> > +# host utility
> > +BR2_PACKAGE_HOST_DFU_UTIL=y
> > +BR2_PACKAGE_HOST_IMX_USB_LOADER=y
> 
> You're not enabling an ext2 filesystem (which is good since you don't
> use it). But you still mention it in your document:
> 
> +You will find in ./output/images/ the following files:
> +  - imx6sl-warp.dtb
> +  - rootfs.ext2
> +  - rootfs.tar
> +  - u-boot.imx
> +  - zImage
> 

So yes we can remove rootfs.ext2 from the document. We don't use it during the
flash process.

> No need to resend just for that, just confirm me that my proposals are
> OK, and I'll fix when applying.
> 

Thanks for that. So yes all your proposals are good. Just need to add the
configuration directory path for the first proposal.

> Thanks,
> 
> Thomas
> -- 

Thanks,
Arthur.

> Thomas Petazzoni, CTO, Free Electrons
> Embedded Linux, Kernel and Android engineering
> http://free-electrons.com