Add clk_csr property for snps,dwmac

Signed-off-by: Jianguo Zhang <jianguo.zhang@mediatek.com>
---
 Documentation/devicetree/bindings/net/snps,dwmac.yaml | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/Documentation/devicetree/bindings/net/snps,dwmac.yaml b/Documentation/devicetree/bindings/net/snps,dwmac.yaml
index 491597c02edf..8cff30a8125d 100644
--- a/Documentation/devicetree/bindings/net/snps,dwmac.yaml
+++ b/Documentation/devicetree/bindings/net/snps,dwmac.yaml
@@ -288,6 +288,11 @@ properties:
       is supported. For example, this is used in case of SGMII and
       MAC2MAC connection.
 
+  clk_csr:
+    $ref: /schemas/types.yaml#/definitions/uint32
+    description:
+      Frequency division factor for MDC clock.
+
   mdio:
     $ref: mdio.yaml#
     unevaluatedProperties: false
-- 
2.25.1