[PATCH v3 2/3] doc: pytest: mention additional requirements for venv

[David Lechner]

Add a paragraph explaining that in addition to the requirements.txt
for test/py/test.py itself, users may need to install additional python
packages depending on the U-Boot configuration being built.

Reviewed-by: Simon Glass <simon.glass at canonical.com>
Tested-by: Mattijs Korpershoek <mkorpershoek at kernel.org> # sandbox
Reviewed-by: Mattijs Korpershoek <mkorpershoek at kernel.org>
Signed-off-by: David Lechner <dlechner at baylibre.com>
---
v2 changes: none
---
 doc/develop/pytest/usage.rst | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/doc/develop/pytest/usage.rst b/doc/develop/pytest/usage.rst
index df3821da20d..f8b32c07edd 100644
--- a/doc/develop/pytest/usage.rst
+++ b/doc/develop/pytest/usage.rst
@@ -90,6 +90,10 @@ environment.  This can be done via the following commands:
     $ . ./venv/bin/activate
     $ pip install -r test/py/requirements.txt
 
+In order to use the ``--build`` option of ``test.py`` there may be additional
+python packages required depending on the configuration being built. These can
+be found with ``find . -name "*.requirements*.txt"``.
+
 Testing sandbox
 ---------------
 

-- 
2.43.0