Merge branch '2023-01-11-assorted-general-updates'

- Assorted Kconfig cleanups, code clean ups, env+ubi updates, correct
  return value propagation out of environment scripts, and update CI to
  latest "jammy" tag.

3 files changed, 22 insertions, 2 deletions

diff --git a/doc/android/fastboot.rst b/doc/android/fastboot.rst
index 7611f07038e..1ad8a897c85 100644
--- a/doc/android/fastboot.rst
+++ b/doc/android/fastboot.rst
@@ -28,6 +28,7 @@ The following OEM commands are supported (if enabled):
 - ``oem partconf`` - this executes ``mmc partconf %x <arg> 0`` to configure eMMC
   with <arg> = boot_ack boot_partition
 - ``oem bootbus``  - this executes ``mmc bootbus %x %s`` to configure eMMC
+- ``oem run`` - this executes an arbitrary U-Boot command
 
 Support for both eMMC and NAND devices is included.
 
@@ -227,6 +228,23 @@ and on the U-Boot side you should see::
 
    Starting kernel ...
 
+Running Shell Commands
+^^^^^^^^^^^^^^^^^^^^^^
+
+Normally, arbitrary U-Boot command execution is not enabled. This is so
+fastboot can be used to update systems using verified boot. However, such
+functionality can be useful for production or when verified boot is not in use.
+Enable ``CONFIG_FASTBOOT_OEM_RUN`` to use this functionality. This will enable
+``oem run`` command, which can be used with the fastboot client. For example,
+to print "Hello at 115200 baud" (or whatever ``CONFIG_BAUDRATE`` is), run::
+
+    $ fastboot oem run:'echo Hello at $baudrate baud'
+
+You can run any command you would normally run on the U-Boot command line,
+including multiple commands (using e.g. ``;`` or ``&&``) and control structures
+(``if``, ``while``, etc.). The exit code of ``fastboot`` will reflect the exit
+code of the command you ran.
+
 References
 ----------
 
diff --git a/doc/board/intel/edison.rst b/doc/board/intel/edison.rst
index 5a65673d1e0..782d75a6745 100644
--- a/doc/board/intel/edison.rst
+++ b/doc/board/intel/edison.rst
@@ -90,7 +90,7 @@ If you want to check if the board is ready, type:
 
 .. code-block:: none
 
-  lsusb | egrep "8087|8086"
+  lsusb | grep -E "8087|8086"
   Bus 001 Device 004: ID 8086:e005 Intel Corp.
 
 If you see a device with the same ID as above, the board is waiting for your
diff --git a/doc/usage/cmd/exit.rst b/doc/usage/cmd/exit.rst
index 769223c4775..3edb12809ce 100644
--- a/doc/usage/cmd/exit.rst
+++ b/doc/usage/cmd/exit.rst
@@ -37,4 +37,6 @@ executed.
 Return value
 ------------
 
-$? is always set to 0 (true).
+$? is default set to 0 (true). In case zero or positive integer parameter
+is passed to the command, the return value is the parameter value. In case
+negative integer parameter is passed to the command, the return value is 0.