20878a1017
The current Buildroot defconfigs for Raspberry Pi and Raspberry Pi 2
instantiate a console on tty1, which appears on HDMI. Add a console on
the serial port (ttyAMA0) to be more consistent with other defconfigs
and provide a better out-of-the-box experience to users used to have a
serial console from Buildroot defconfigs.
This requires three changes:
1. have two 'console=' entries in the kernel command line: tty1,
then ttyAMA0;
2. change BR2_TARGET_GENERIC_GETTY_PORT to "console", so it starts
a getty on the last console= passed to the kernel, ttyAMA0;
3. add a new getty on tty1 to the generated inittab.
Step 2 is actually obtained by removing BR2_TARGET_GENERIC_GETTY_PORT
entirely from the defconfigs, since "console" is the default value.
Step 3 requires a post-build script since the Buildroot makefiles can
configure only one console.
Note: instead of simply adding a new getty on ttyAMA0 (which would
work) this patch actually changes BR2_TARGET_GENERIC_GETTY_PORT to
instantiate a console on UART, then adds back tty1 via
post-build.sh. This is done only to avoid the "GENERIC_SERIAL" comment
where we instantiate an HDMI console, then instantiate a really-serial
console on another line.
The result is these two inittab lines:
console::respawn:/sbin/getty -L console 0 vt100 # GENERIC_SERIAL
tty1::respawn:/sbin/getty -L tty1 0 vt100 # HDMI console
Cc: Yann E. MORIN <yann.morin.1998@free.fr>
Cc: Arnout Vandecappelle <arnout@mind.be>
Signed-off-by: Luca Ceresoli <luca@lucaceresoli.net>
Reviewed-by: "Yann E. MORIN" <yann.morin.1998@free.fr>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
37 lines
1.0 KiB
Plaintext
37 lines
1.0 KiB
Plaintext
BR2_arm=y
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BR2_cortex_a7=y
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BR2_ARM_EABIHF=y
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BR2_ARM_FPU_NEON_VFPV4=y
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BR2_TOOLCHAIN_BUILDROOT_CXX=y
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BR2_SYSTEM_DHCP="eth0"
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# Linux headers same as kernel, a 4.1 series
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BR2_PACKAGE_HOST_LINUX_HEADERS_CUSTOM_4_1=y
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BR2_LINUX_KERNEL=y
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BR2_LINUX_KERNEL_CUSTOM_GIT=y
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BR2_LINUX_KERNEL_CUSTOM_REPO_URL="https://github.com/raspberrypi/linux.git"
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BR2_LINUX_KERNEL_CUSTOM_REPO_VERSION="d33d0293e245badc4ca6ede3984d8bb8ea63cb1a"
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BR2_LINUX_KERNEL_DEFCONFIG="bcm2709"
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# Build the DTB from the kernel sources
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BR2_LINUX_KERNEL_DTS_SUPPORT=y
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BR2_LINUX_KERNEL_INTREE_DTS_NAME="bcm2709-rpi-2-b"
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BR2_PACKAGE_RPI_FIRMWARE=y
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# BR2_PACKAGE_RPI_FIRMWARE_INSTALL_DTB_OVERLAYS is not set
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# Required tools to create the SD image
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BR2_PACKAGE_HOST_DOSFSTOOLS=y
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BR2_PACKAGE_HOST_GENIMAGE=y
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BR2_PACKAGE_HOST_MTOOLS=y
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# Filesystem / image
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BR2_TARGET_ROOTFS_EXT2=y
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BR2_TARGET_ROOTFS_EXT2_4=y
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# BR2_TARGET_ROOTFS_TAR is not set
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BR2_ROOTFS_POST_BUILD_SCRIPT="board/raspberrypi2/post-build.sh"
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BR2_ROOTFS_POST_IMAGE_SCRIPT="board/raspberrypi2/post-image.sh"
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