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| author | Reuben Dowle <reubendowle0@gmail.com> | 2021-05-14 10:15:43 +1200 |
|---|---|---|
| committer | Peng Fan <peng.fan@nxp.com> | 2021-06-22 12:02:46 +0800 |
| commit | 5c2beda545dde4d27c0e893e97c74740ff27ff2f (patch) | |
| tree | 7fddad0f0bce3581c95a6221ffbb7a8c3c2fa4ed /doc | |
| parent | 1925e65706b84ec83b99e6335d9a36d8644c9085 (diff) | |
| download | u-boot-5c2beda545dde4d27c0e893e97c74740ff27ff2f.tar.gz | |
mmc: Update environment variable with active partition
This patch allows uboot scripts make choices about where to boot from based
on the active mmc boot partition. This allows having two copies of kernel,
filesystems etc, and choosing which to boot from based off of the active
bootloader partition.
Signed-off-by: Reuben Dowle <reuben.dowle@4rf.com>
Reviewed-by: Jaehoon Chung <jh80.chung@samsung.com>
Diffstat (limited to 'doc')
| -rw-r--r-- | doc/usage/mmc.rst | 4 |
1 files changed, 3 insertions, 1 deletions
diff --git a/doc/usage/mmc.rst b/doc/usage/mmc.rst index 458c7642c0..f20efe3d70 100644 --- a/doc/usage/mmc.rst +++ b/doc/usage/mmc.rst @@ -19,7 +19,7 @@ Synopsis mmc wp mmc bootbus <dev> <boot_bus_width> <reset_boot_bus_width> <boot_mode> mmc bootpart-resize <dev> <dev part size MB> <RPMB part size MB> - mmc partconf <dev> [boot_ack boot_partition partition_access] + mmc partconf <dev> [[varname] | [<boot_ack> <boot_partition> <partition_access>]] mmc rst-function <dev> <value> Description @@ -92,6 +92,8 @@ The 'mmc bootbus' command sets the BOOT_BUS_WIDTH field. (*Refer to eMMC specifi The 'mmc partconf' command shows or changes PARTITION_CONFIG field. + varname + When showing the PARTITION_CONFIG, an optional environment variable to store the current boot_partition value into. boot_ack boot acknowledge value boot_partition |