diff --git a/Documentation/devicetree/bindings/vendor-prefixes.txt b/Documentation/devicetree/bindings/vendor-prefixes.txt
index 5b2d71a8907b1cb83456107594d7dd7877c07d9d..c401d10335bc5cb4f1c24ba6186a800b8d9f1283 100644
--- a/Documentation/devicetree/bindings/vendor-prefixes.txt
+++ b/Documentation/devicetree/bindings/vendor-prefixes.txt
@@ -414,6 +414,7 @@ xes	Extreme Engineering Solutions (X-ES)
 xillybus	Xillybus Ltd.
 xlnx	Xilinx
 xunlong	Shenzhen Xunlong Software CO.,Limited
+ysoft	Y Soft Corporation a.s.
 zarlink	Zarlink Semiconductor
 zeitec	ZEITEC Semiconductor Co., LTD.
 zidoo	Shenzhen Zidoo Technology Co., Ltd.