[PATCH 2/2] doc: k3: update documentation for uEnv.txt

[Manorit Chawdhry]

Add the information for the save_uenv command and refactor the
documentation to remove the eMMC information that was wrong.

Signed-off-by: Manorit Chawdhry <m-chawdhry at ti.com>
---
 doc/board/ti/k3.rst | 24 ++++++++++++++----------
 1 file changed, 14 insertions(+), 10 deletions(-)

diff --git a/doc/board/ti/k3.rst b/doc/board/ti/k3.rst
index 7dfe39c5fa57..e95779e32566 100644
--- a/doc/board/ti/k3.rst
+++ b/doc/board/ti/k3.rst
@@ -594,20 +594,21 @@ Refer (:ref:`U-boot ARMV8 build <k3_rst_include_start_build_steps_uboot>`)
 Saving environment
 ------------------
 
-SAVEENV is disabled by default and for the new flow uses Uenv.txt as the default
-way for saving the environments. This has been done as Uenv.txt is more granular
-then the saveenv command and can be used across various bootmodes too.
+CONFIG_CMD_SAVEENV is disabled by default and for the new flow uses
+uEnv.txt as the default way for saving the environments. This has been done
+as uEnv.txt is more granular then the saveenv command and can be used
+across various bootmodes too.
 
-**Writing to MMC/EMMC**
+**Writing to MMC**
 
 .. prompt:: bash =>
 
-  env export -t $loadaddr <list of variables>
-  fatwrite mmc ${mmcdev} ${loadaddr} ${bootenvfile} ${filesize}
+  setenv save_to_env <variables to be saved in uEnv.txt>
+  run save_uenv
 
-**Reading from MMC/EMMC**
+**Reading from MMC**
 
-By default run envboot will read it from the MMC/EMMC partition ( based on
+By default run envboot will read it from the MMC partition ( based on
 mmcdev) and set the environments.
 
 If manually needs to be done then the environment can be read from the
@@ -615,8 +616,11 @@ filesystem and then imported
 
 .. prompt:: bash =>
 
-  fatload mmc ${mmcdev} ${loadaddr} ${bootenvfile}
-  env import -t ${loadaddr} ${filesize}
+  run envboot
+
+To read from eMMC, the save_uenv and envboot commands would need to be
+changed to pickup the bootenvfile from eMMC. Mainly the write and read
+commands would change to eMMC.
 
 .. _k3_rst_refer_openocd:
 

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