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| author | Luca Ceresoli <luca@lucaceresoli.net> | 2016-04-17 23:45:46 +0200 |
|---|---|---|
| committer | Thomas Petazzoni <thomas.petazzoni@free-electrons.com> | 2016-04-18 13:36:11 +0200 |
| commit | 20878a1017e2bf7eb8c5f870dc6d2641493cb0f9 (patch) | |
| tree | 7880ef3240573c38d005e3aab7f63515b16a1efa /configs/raspberrypi_defconfig | |
| parent | 85f2e13c637bbc05a428436ef000b5531505b756 (diff) | |
| download | buildroot-20878a1017e2bf7eb8c5f870dc6d2641493cb0f9.tar.gz buildroot-20878a1017e2bf7eb8c5f870dc6d2641493cb0f9.zip | |
raspberrypi, raspberrypi2: add a serial console
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>
Diffstat (limited to 'configs/raspberrypi_defconfig')
| -rw-r--r-- | configs/raspberrypi_defconfig | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/configs/raspberrypi_defconfig b/configs/raspberrypi_defconfig index 1795b2c03d..8d13381105 100644 --- a/configs/raspberrypi_defconfig +++ b/configs/raspberrypi_defconfig @@ -2,7 +2,6 @@ BR2_arm=y BR2_arm1176jzf_s=y BR2_ARM_EABIHF=y -BR2_TARGET_GENERIC_GETTY_PORT="tty1" BR2_SYSTEM_DHCP="eth0" # Linux headers same as kernel, a 4.1 series @@ -32,4 +31,5 @@ BR2_PACKAGE_HOST_MTOOLS=y BR2_TARGET_ROOTFS_EXT2=y BR2_TARGET_ROOTFS_EXT2_4=y # BR2_TARGET_ROOTFS_TAR is not set +BR2_ROOTFS_POST_BUILD_SCRIPT="board/raspberrypi/post-build.sh" BR2_ROOTFS_POST_IMAGE_SCRIPT="board/raspberrypi/post-image.sh" |
