[Buildroot] [PATCH 1/1] configs: add raspberrypi4 64bits defconfig

Romain Naour romain.naour at smile.fr
Fri Nov 29 17:43:42 UTC 2019


Hi Arthur,

Le 29/11/2019 à 17:02, Arthur Courtel a écrit :
> This configuration builds a 64bit image for RaspberryPi 4.
> 
> Signed-off-by: Arthur Courtel <arthur.courtel at smile.fr>
> ---
>  .../raspberrypi/genimage-raspberrypi4-64.cfg  | 30 +++++++++++++++++++
>  board/raspberrypi/post-image.sh               |  4 +--
>  board/raspberrypi4-64                         |  1 +
>  configs/raspberrypi4_64_defconfig             | 24 +++++++++++++++
>  4 files changed, 57 insertions(+), 2 deletions(-)
>  create mode 100644 board/raspberrypi/genimage-raspberrypi4-64.cfg
>  create mode 120000 board/raspberrypi4-64
>  create mode 100644 configs/raspberrypi4_64_defconfig
> 
> diff --git a/board/raspberrypi/genimage-raspberrypi4-64.cfg b/board/raspberrypi/genimage-raspberrypi4-64.cfg
> new file mode 100644
> index 0000000000..3c480e98f0
> --- /dev/null
> +++ b/board/raspberrypi/genimage-raspberrypi4-64.cfg
> @@ -0,0 +1,30 @@
> +image boot.vfat {
> +  vfat {
> +    files = {
> +      "bcm2711-rpi-4-b.dtb",
> +      "rpi-firmware/cmdline.txt",
> +      "rpi-firmware/config.txt",
> +      "rpi-firmware/fixup4.dat",
> +      "rpi-firmware/start4.elf",
> +      "rpi-firmware/overlays",
> +      "Image"

Not related to your patch but the raspberry-pi3 defconfig use zImage but the
64bit version use Image.

Any reason for this?

> +    }
> +  }
> +  size = 32M
> +}
> +
> +image sdcard.img {
> +  hdimage {
> +  }
> +
> +  partition boot {
> +    partition-type = 0xC
> +    bootable = "true"
> +    image = "boot.vfat"
> +  }
> +
> +  partition rootfs {
> +    partition-type = 0x83
> +    image = "rootfs.ext4"
> +  }
> +}
> diff --git a/board/raspberrypi/post-image.sh b/board/raspberrypi/post-image.sh
> index bf9af5dc60..e79141f142 100755
> --- a/board/raspberrypi/post-image.sh
> +++ b/board/raspberrypi/post-image.sh
> @@ -15,7 +15,7 @@ do
>  			echo "Adding 'dtoverlay=pi3-miniuart-bt' to config.txt (fixes ttyAMA0 serial console)."
>  			cat << __EOF__ >> "${BINARIES_DIR}/rpi-firmware/config.txt"
>  
> -# fixes rpi3 ttyAMA0 serial console
> +# fixes rpi3/4 ttyAMA0 serial console

Are you sure that is the same devicetree overlay for rpi3 and rpi4 ?

The option is rpi3 specific (--add-pi3-miniuart-bt-overlay).

>  dtoverlay=pi3-miniuart-bt
>  __EOF__
>  		fi
> @@ -35,7 +35,7 @@ __EOF__
>  		if ! grep -qE '^enable_uart=1' "${BINARIES_DIR}/rpi-firmware/config.txt"; then
>  			cat << __EOF__ >> "${BINARIES_DIR}/rpi-firmware/config.txt"
>  
> -# enable rpi3 ttyS0 serial console
> +# enable rpi3/4 ttyS0 serial console
>  enable_uart=1
>  __EOF__
>  		fi
> diff --git a/board/raspberrypi4-64 b/board/raspberrypi4-64
> new file mode 120000
> index 0000000000..fcdafc81ed
> --- /dev/null
> +++ b/board/raspberrypi4-64
> @@ -0,0 +1 @@
> +raspberrypi
> \ No newline at end of file
> diff --git a/configs/raspberrypi4_64_defconfig b/configs/raspberrypi4_64_defconfig
> new file mode 100644
> index 0000000000..3d30fb05f5
> --- /dev/null
> +++ b/configs/raspberrypi4_64_defconfig
> @@ -0,0 +1,24 @@
> +BR2_aarch64=y
> +BR2_cortex_a72=y
> +BR2_PACKAGE_HOST_LINUX_HEADERS_CUSTOM_4_19=y
> +BR2_TOOLCHAIN_BUILDROOT_CXX=y
> +BR2_SYSTEM_DHCP="eth0"
> +BR2_ROOTFS_POST_BUILD_SCRIPT="board/raspberrypi4-64/post-build.sh"
> +BR2_ROOTFS_POST_IMAGE_SCRIPT="board/raspberrypi4-64/post-image.sh"
> +BR2_ROOTFS_POST_SCRIPT_ARGS="--add-pi3-miniuart-bt-overlay --aarch64"
> +BR2_LINUX_KERNEL=y
> +BR2_LINUX_KERNEL_CUSTOM_TARBALL=y
> +BR2_LINUX_KERNEL_CUSTOM_TARBALL_LOCATION="$(call github,raspberrypi,linux,raspberrypi-kernel_1.20190819-1)/linux-raspberrypi-kernel_1.20190819-1.tar.gz"
> +BR2_LINUX_KERNEL_DEFCONFIG="bcm2711"
> +BR2_LINUX_KERNEL_DTS_SUPPORT=y
> +BR2_LINUX_KERNEL_INTREE_DTS_NAME="broadcom/bcm2711-rpi-4-b"
> +BR2_LINUX_KERNEL_NEEDS_HOST_OPENSSL=y
> +BR2_PACKAGE_RPI_FIRMWARE=y
> +BR2_PACKAGE_RPI_FIRMWARE_VARIANT_PI4=y
> +BR2_TARGET_ROOTFS_EXT2=y
> +BR2_TARGET_ROOTFS_EXT2_4=y
> +BR2_TARGET_ROOTFS_EXT2_SIZE="120M"
> +# BR2_TARGET_ROOTFS_TAR is not set
> +BR2_PACKAGE_HOST_DOSFSTOOLS=y
> +BR2_PACKAGE_HOST_GENIMAGE=y
> +BR2_PACKAGE_HOST_MTOOLS=y

We use generally a hand written defconfig file to add some comments, see [1].

[1] https://git.buildroot.net/buildroot/tree/configs/raspberrypi4_defconfig

Best regards,
Romain




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