of: Add device tree selftests

Add some runtime test cases for the library of device tree parsing functions.

v2: - Add testcase for phandle with 0 args
    - Don't run testcases if testcase data isn't present in device tree

Signed-off-by: Grant Likely <grant.likely@secretlab.ca>

1 files changed, 9 insertions, 0 deletions

diff --git a/drivers/of/Kconfig b/drivers/of/Kconfig
index cac63c9f49ae..268163dd71c7 100644
--- a/drivers/of/Kconfig
+++ b/drivers/of/Kconfig
@@ -15,6 +15,15 @@ config PROC_DEVICETREE
           an image of the device tree that the kernel copies from Open
           Firmware or other boot firmware. If unsure, say Y here.
 
+config OF_SELFTEST
+        bool "Device Tree Runtime self tests"
+        help
+          This option builds in test cases for the device tree infrastructure
+          that are executed one at boot time, and the results dumped to the
+          console.
+
+          If unsure, say N here, but this option is safe to enable.
+
 config OF_FLATTREE
         bool
         select DTC