of: Allow selection of OF_DYNAMIC and OF_OVERLAY if OF_UNITTEST

Currently OF_DYNAMIC and OF_OVERLAY are not visible to the user, and are
selected automatically only when needed.

Allow them to be enabled manually to improve device tree unit test
coverage.

Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>
Signed-off-by: Grant Likely <grant.likely@linaro.org>

1 files changed, 10 insertions, 1 deletions

diff --git a/drivers/of/Kconfig b/drivers/of/Kconfig
index 7bcaeec876c0..1470b5227834 100644
--- a/drivers/of/Kconfig
+++ b/drivers/of/Kconfig
@@ -34,7 +34,11 @@ config OF_PROMTREE
 # Hardly any platforms need this.  It is safe to select, but only do so if you
 # need it.
 config OF_DYNAMIC
-        bool
+        bool "Support for dynamic device trees" if OF_UNITTEST
+        help
+          On some platforms, the device tree can be manipulated at runtime.
+          While this option is selected automatically on such platforms, you
+          can enable it manually to improve device tree unit test coverage.
 
 config OF_ADDRESS
         def_bool y
@@ -87,5 +91,10 @@ config OF_OVERLAY
         bool "Device Tree overlays"
         select OF_DYNAMIC
         select OF_RESOLVE
+        help
+          Overlays are a method to dynamically modify part of the kernel's
+          device tree with dynamically loaded data.
+          While this option is selected automatically when needed, you can
+          enable it manually to improve device tree unit test coverage.
 
 endmenu # OF