a0871be6c0
* Update buildroot-patches for 2020.11-rc1 buildroot * Update buildroot to 2020.11-rc1 Signed-off-by: Stefan Agner <stefan@agner.ch> * Don't rely on sfdisk --list-free output The --list-free (-F) argument does not allow machine readable mode. And it seems that the output format changes over time (different spacing, using size postfixes instead of raw blocks). Use sfdisk json output and calculate free partition space ourselfs. This works for 2.35 and 2.36 and is more robust since we rely on output which is meant for scripts to parse. * Migrate defconfigs for Buildroot 2020.11-rc1 In particular, rename BR2_TARGET_UBOOT_BOOT_SCRIPT(_SOURCE) to BR2_PACKAGE_HOST_UBOOT_TOOLS_BOOT_SCRIPT(_SOURCE). * Rebase/remove systemd patches for systemd 246 * Drop apparmor/libapparmor from buildroot-external * hassos-persists: use /run as directory for lockfiles The U-Boot tools use /var/lock by default which is not created any more by systemd by default (it is under tmpfiles legacy.conf, which we no longer install). * Disable systemd-update-done.service The service is not suited for pure read-only systems. In particular the service needs to be able to write a file in /etc and /var. Remove the service. Note: This is a static service and cannot be removed using systemd-preset. * Disable apparmor.service for now The service loads all default profiles. Some might actually cause problems. E.g. the profile for ping seems not to match our setup for /etc/resolv.conf: [85503.634653] audit: type=1400 audit(1605286002.684:236): apparmor="DENIED" operation="open" profile="ping" name="/run/resolv.conf" pid=27585 comm="ping" requested_mask="r" denied_mask="r" fsuid=0 ouid=0
81 lines
2.5 KiB
Plaintext
81 lines
2.5 KiB
Plaintext
Kontron SMARC-sAL28
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===================
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How to build it
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===============
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Configure Buildroot:
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$ make kontron_smarc_sal28_defconfig
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Change settings to fit your needs (optional):
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$ make menuconfig
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Compile everything and build the rootfs image:
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$ make
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Copying the image to a storage device
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=====================================
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Buildroot builds an image which can be written to the internal eMMC
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storage, a SD card or an USB thumb drive. You can use the following
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command on your host:
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$ sudo dd if=output/images/sdcard-emmc.img of=/dev/sdx bs=1M
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Where /dev/sdx is the corresponding block device of your SD card or USB
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thumb drive. To flash it on your internal eMMC use the following command on
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the board:
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# dd if=sdcard-emmc.img of=/dev/mmcblk1 bs=1M
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Be sure you have not booted from the internal eMMC in this case!
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Booting the board
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=================
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By default the bootloader will search for the first valid image, starting
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with the internal eMMC. Consult the vendor documentation on how to use the
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DIP switches to select specific boot devices. To use the bootloader
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environment set the boot_targets correspondingly. E.g.:
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# setenv boot_targets usb0
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To boot from an USB thumb drive.
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The device tree is loaded according to the filename in fdtfile. The
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following command will set the default device tree, which works on almost
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all variants (with less features of course):
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# setenv fdtfile freescale/fsl-ls1028a-kontron-sl28.dtb
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Set this to a device tree which fits your board variant.
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Connect your serial cable to SER1 and open your favorite terminal emulation
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program (baudrate 115200, 8n1). E.g.:
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$ picocom -b 115200 /dev/ttyUSB0
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You will get a warning reported by fdisk when you examine the SD card.
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This is because the genimage.cfg file doesn't specify the SD card size
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(as people will naturally have different sized cards), so the
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secondary GPT header is placed after the rootfs rather than at the end
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of the disk where it is expected to be.
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You will see something like this at boot time:
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[ 4.552797] GPT:Primary header thinks Alt. header is not at the end of the disk.
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[ 4.560237] GPT:266272 != 7864319
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[ 4.563565] GPT:Alternate GPT header not at the end of the disk.
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[ 4.569596] GPT:266272 != 7864319
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[ 4.572925] GPT: Use GNU Parted to correct GPT errors.
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What does not work
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==================
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For reasons unknown, the network card doesn't work if you use the original
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vendor bootloader. Board support patches for upstream u-boot are currently
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pending. Stay tuned.
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