Document the new 'ufs-keyslot-offset' dt property used to configure
a fixed offset for crypto keyslot remapping in UFS host controllers.

This is useful in virtualized or multi-domain environments where keyslot
layout is partitioned (e.g., per-VM isolation). If the property is not
present, the keyslot is used as-is (identity mapping).

The binding is used by the exynos UFS driver to support secure inline
encryption in domain-isolated scenarios.

Signed-off-by: zheng.gong <zheng.gong@samsung.com>
---
 .../devicetree/bindings/ufs/samsung,exynos-ufs.yaml          | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/Documentation/devicetree/bindings/ufs/samsung,exynos-ufs.yaml b/Documentation/devicetree/bindings/ufs/samsung,exynos-ufs.yaml
index b4e744ebffd1..0ed60bbd959e 100644
--- a/Documentation/devicetree/bindings/ufs/samsung,exynos-ufs.yaml
+++ b/Documentation/devicetree/bindings/ufs/samsung,exynos-ufs.yaml
@@ -72,6 +72,11 @@ properties:
 
   dma-coherent: true
 
+  ufs-keyslot-offset:
+    $ref: /schemas/types.yaml#/definitions/uint32
+    description:
+      Offset added to logical crypto keyslot for multi-domain isolation.
+
 required:
   - compatible
   - reg
-- 
2.50.1