did something

vendor/periph.io/x/conn/v3/i2c/func.go

@@ -0,0 +1,13 @@
+// Copyright 2018 The Periph Authors. All rights reserved.
+// Use of this source code is governed under the Apache License, Version 2.0
+// that can be found in the LICENSE file.
+
+package i2c
+
+import "periph.io/x/conn/v3/pin"
+
+// Well known pin functionality.
+const (
+	SCL pin.Func = "I2C_SCL" // Clock
+	SDA pin.Func = "I2C_SDA" // Data
+)