[PATCH 2/2] dt-bindings: rockchip: grf: Narrow allowed reboot modes

[Krzysztof Kozlowski]

syscon-reboot-mode schema allows arbitrary "mode-.* properties but only
a subset actually makes sense and is valid.  Provide negative look-ahead
pattern to disallow any modes not supported by the device, which
tightens the binding.

Signed-off-by: Krzysztof Kozlowski <krzysztof.kozlowski at oss.qualcomm.com>
---
 Documentation/devicetree/bindings/soc/rockchip/grf.yaml | 7 +++++--
 1 file changed, 5 insertions(+), 2 deletions(-)

diff --git a/Documentation/devicetree/bindings/soc/rockchip/grf.yaml b/Documentation/devicetree/bindings/soc/rockchip/grf.yaml
index 2cc43742b8e3..7bcb4e2f47ec 100644
--- a/Documentation/devicetree/bindings/soc/rockchip/grf.yaml
+++ b/Documentation/devicetree/bindings/soc/rockchip/grf.yaml
@@ -239,11 +239,14 @@ allOf:
       properties:
         reboot-mode:
           type: object
-
           $ref: /schemas/power/reset/syscon-reboot-mode.yaml#
-
           unevaluatedProperties: false
 
+          patternProperties:
+            # Negative look-ahead to disallow unsupported modes. The '$' has to be
+            # part of lookahead group to work, instead of trailing outside of ().
+            "^mode-(?!(bootloader$|fastboot$|loader$|normal$|recovery$))": false
+
   - if:
       properties:
         compatible:
-- 
2.53.0