v4.19.13 snapshot.
diff --git a/include/dt-bindings/pinctrl/stm32-pinfunc.h b/include/dt-bindings/pinctrl/stm32-pinfunc.h
new file mode 100644
index 0000000..b5a2174
--- /dev/null
+++ b/include/dt-bindings/pinctrl/stm32-pinfunc.h
@@ -0,0 +1,36 @@
+/* SPDX-License-Identifier: (GPL-2.0+ OR BSD-3-Clause) */
+/*
+ * Copyright (C) STMicroelectronics 2017 - All Rights Reserved
+ * Author: Torgue Alexandre <alexandre.torgue@st.com> for STMicroelectronics.
+ */
+
+#ifndef _DT_BINDINGS_STM32_PINFUNC_H
+#define _DT_BINDINGS_STM32_PINFUNC_H
+
+/* define PIN modes */
+#define GPIO 0x0
+#define AF0 0x1
+#define AF1 0x2
+#define AF2 0x3
+#define AF3 0x4
+#define AF4 0x5
+#define AF5 0x6
+#define AF6 0x7
+#define AF7 0x8
+#define AF8 0x9
+#define AF9 0xa
+#define AF10 0xb
+#define AF11 0xc
+#define AF12 0xd
+#define AF13 0xe
+#define AF14 0xf
+#define AF15 0x10
+#define ANALOG 0x11
+
+/* define Pins number*/
+#define PIN_NO(port, line) (((port) - 'A') * 0x10 + (line))
+
+#define STM32_PINMUX(port, line, mode) (((PIN_NO(port, line)) << 8) | (mode))
+
+#endif /* _DT_BINDINGS_STM32_PINFUNC_H */
+