[PATCH v2 5/5] Documentation: migration-2025.07.0: document CONFIG_DEEP_PROBE_DEFAULT

[Ahmad Fatoum <a.fatoum@barebox.org>]

Out of tree boards will get a warning on startup now asking them to
explicitly opt-in or opt-out to deep probe. Document this.

Reviewed-by: Marco Felsch <m.felsch@pengutronix.de>
Signed-off-by: Ahmad Fatoum <a.fatoum@barebox.org>
---
v1 -> v2:
  - Collected Marco's R-b
---
 Documentation/migration-guides/migration-2025.07.0.rst | 10 ++++++++++
 1 file changed, 10 insertions(+)

diff --git a/Documentation/migration-guides/migration-2025.07.0.rst b/Documentation/migration-guides/migration-2025.07.0.rst
index 896d2552e9ea..fe47c3109745 100644
--- a/Documentation/migration-guides/migration-2025.07.0.rst
+++ b/Documentation/migration-guides/migration-2025.07.0.rst
@@ -7,3 +7,13 @@ Configuration options
 * The legacy ARM 32-bit ATAGS mechanism is now disabled by default.
   It can be re-enabled using the newly added ``CONFIG_BOOT_ATAGS`` option.
   Use of ATAGS is deprecated. Users should migrate to OpenFirmware device trees.
+
+Board support
+-------------
+
+* barebox now warns at runtime about boards that disable the option
+  ``CONFIG_DEEP_PROBE_DEFAULT`` and list neither the ``barebox,deep-probe``
+  nor ``barebox,disable-deep-probe`` property in the top-level device tree node.
+  It's recommended that all boards switch to deep probe.
+  If deep probe breaks your platform, please report to the mailing list
+  and set ``barebox,disable-deep-probe`` in your device tree.
-- 
2.39.5