From 5c2beda545dde4d27c0e893e97c74740ff27ff2f Mon Sep 17 00:00:00 2001
From: Reuben Dowle <reubendowle0@gmail.com>
Date: Fri, 14 May 2021 10:15:43 +1200
Subject: 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>
---
 doc/usage/mmc.rst | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

(limited to 'doc/usage')

diff --git a/doc/usage/mmc.rst b/doc/usage/mmc.rst
index 458c7642c07..f20efe3d706 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
-- 
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