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The M.2 slots of the related IOT2050 variant need to be configured according to the plugged cards. This tries to detect the card using the M.2 configuration pins of the B-key slot. If that fails, a U-Boot environment variable can be set to configure manually. This variable is write-permitted also in secure boot mode as it is not able to undermine the integrity of the booted system. The configuration is then applied to mux the serdes and to fix up the device tree passed to or loaded by the bootloader. The fix-ups are coming from device tree overlays that are embedded into the firmware image and there also integrity protected. The OS remains free to load a device tree to which they do not apply: U-Boot will not fail to boot in that case. Based on original patch by Chao Zeng. Signed-off-by: Jan Kiszka <jan.kiszka@siemens.com>
This patch series adds support for ZFS listing and load to u-boot. To Enable zfs ls and load commands, modify the board specific config file with #define CONFIG_CMD_ZFS Steps to test: 1. After applying the patch, zfs specific commands can be seen in the boot loader prompt using UBOOT #help zfsload- load binary file from a ZFS file system zfsls - list files in a directory (default /) 2. To list the files in zfs pool, device or partition, execute zfsls <interface> <dev[:part]> [POOL/@/dir/file] For example: UBOOT #zfsls mmc 0:5 /rpool/@/usr/bin/ 3. To read and load a file from an ZFS formatted partition to RAM, execute zfsload <interface> <dev[:part]> [addr] [filename] [bytes] For example: UBOOT #zfsload mmc 2:2 0x30007fc0 /rpool/@/boot/uImage References : -- ZFS GRUB sources from Solaris GRUB-0.97 -- GRUB Bazaar repository Jorgen Lundman <lundman at lundman.net> 2012.