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base-files: add eMMC sysupgrade support

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Adds generic support for sysupgrading on eMMC-based devices.

Provide function emmc_do_upgrade and emmc_copy_config to be used in
/lib/upgrade/platform.sh instead of redundantly implementing the same
logic over and over again.
Similar to generic sysupgrade on NAND, use environment variables
CI_KERNPART, CI_ROOTPART and newly introduce CI_DATAPART to indicate
GPT partition names to be used. On devices with more than one MMC
block device, CI_ROOTDEV can be used to specify the MMC device for
partition name lookups.

Also allow to select block devices directly using EMMC_KERN_DEV,
EMMC_ROOT_DEV and EMMC_DATA_DEV, as using GPT partition names is not
always an option (e.g. when forced to use MBR).

To easily handle writing kernel and rootfs make use of sysupgrade.tar
format convention which is also already used for generic NAND support.

Signed-off-by: Enrico Mioso <mrkiko.rs@gmail.com>
Signed-off-by: Daniel Golle <daniel@makrotopia.org>
CC: Li Zhang <li.zhang@gl-inet.com>
CC: TruongSinh Tran-Nguyen <i@truongsinh.pro>
This commit is contained in:
Enrico Mioso
2021-12-01 16:17:55 +01:00
committed by Daniel Golle
parent 8d62304785
commit 57c1f3f9c5
4 changed files with 76 additions and 0 deletions
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3
target/Config.in
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@ -98,6 +98,9 @@ config HAS_MIPS16
config RFKILL_SUPPORT
bool
config EMMC_SUPPORT
bool
config NAND_SUPPORT
bool