[PATCH] dt-bindings: power: reset: qcom,pon: Narrow allowed reboot modes

[Krzysztof Kozlowski]

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@xxxxxxxxxxxxxxxx>
---
 Documentation/devicetree/bindings/power/reset/qcom,pon.yaml | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/Documentation/devicetree/bindings/power/reset/qcom,pon.yaml b/Documentation/devicetree/bindings/power/reset/qcom,pon.yaml
index 979a377cb4ff..71d43d3602f7 100644
--- a/Documentation/devicetree/bindings/power/reset/qcom,pon.yaml
+++ b/Documentation/devicetree/bindings/power/reset/qcom,pon.yaml
@@ -79,6 +79,10 @@ allOf:
         reg-names:
           items:
             - const: pon
+      patternProperties:
+        # Negative look-ahead to disallow unsupported modes. The '$' has to be
+        # part of lookahead group to work, instead of trailing outside of ().
+        "^mode-(?!(bootloader$|recovery$))": false
     else:
       patternProperties:
         "^mode-.*$": false
-- 
2.53.0