Describe the SGMII/SerDes PHY present on the qcs8300 platforms. Since
qcs8300 shares the same SerDes as sa8775p, so it fallback to the
compatible.

Signed-off-by: Yijie Yang <quic_yijiyang@quicinc.com>
Reviewed-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
---
 .../devicetree/bindings/phy/qcom,sa8775p-dwmac-sgmii-phy.yaml      | 7 ++++++-
 1 file changed, 6 insertions(+), 1 deletion(-)

diff --git a/Documentation/devicetree/bindings/phy/qcom,sa8775p-dwmac-sgmii-phy.yaml b/Documentation/devicetree/bindings/phy/qcom,sa8775p-dwmac-sgmii-phy.yaml
index b9107759b2a51738d884f6bdce16bf0bff644056..90fc8c039219c739eae05cc17108a9a2fc6193df 100644
--- a/Documentation/devicetree/bindings/phy/qcom,sa8775p-dwmac-sgmii-phy.yaml
+++ b/Documentation/devicetree/bindings/phy/qcom,sa8775p-dwmac-sgmii-phy.yaml
@@ -15,7 +15,12 @@ description:
 
 properties:
   compatible:
-    const: qcom,sa8775p-dwmac-sgmii-phy
+    oneOf:
+      - items:
+          - enum:
+              - qcom,qcs8300-dwmac-sgmii-phy
+          - const: qcom,sa8775p-dwmac-sgmii-phy
+      - const: qcom,sa8775p-dwmac-sgmii-phy
 
   reg:
     items:

-- 
2.34.1