[PATCH 1/2] Documentation: troubleshooting: mention bootrom command

[Ahmad Fatoum <a.fatoum@pengutronix.de>]

The bootrom command is easily overlooked, but it's useful when debugging
BootROM refusing to boot on i.MX8M, so mention it.

Signed-off-by: Ahmad Fatoum <a.fatoum@pengutronix.de>
---
 Documentation/devel/troubleshooting.rst | 11 +++++++++++
 1 file changed, 11 insertions(+)

diff --git a/Documentation/devel/troubleshooting.rst b/Documentation/devel/troubleshooting.rst
index f96b4d2b15ff..796f5eef4f13 100644
--- a/Documentation/devel/troubleshooting.rst
+++ b/Documentation/devel/troubleshooting.rst
@@ -142,6 +142,17 @@ System-on-Chip.
   functions that can be used to toggle a GPIO. These can be used for
   debugging early hangs by toggling an LED for example.
 
+- Inspect via fallback boot method
+
+  On some systems, a failure to boot from one boot medium causes the
+  BootROM to try a fallback. If the fallback can actually boot barebox,
+  you may be able to get more information once the shell is reached.
+  For example, if the BootROM refuses eMMC boot, is eMMC at least usable
+  from within barebox?
+  barebox can also decode BootROM logs on some SoCs via
+  :ref:`command_bootrom`, which can answer questions as whether the
+  BootROM even attempted access to the desired boot medium.
+
 - Trace BootROM activity
 
   If you have no indication that the barebox prebootloader is being started,
-- 
2.47.3