From 3a310f59c38501d559455230b9a9226ca7986745 Mon Sep 17 00:00:00 2001
From: Dario Binacchi <dario.binacchi@amarulasolutions.com>
Date: Sun, 27 Apr 2025 09:43:26 +0200
Subject: [PATCH] ARM: dts: stm32: add an extra pin map for USART1 on stm32h743

Add an additional pin map configuration for using the USART1 controller
on the stm32h743 MCU.

Signed-off-by: Dario Binacchi <dario.binacchi@amarulasolutions.com>
Link: https://lore.kernel.org/r/20250427074404.3278732-8-dario.binacchi@amarulasolutions.com
Signed-off-by: Alexandre Torgue <alexandre.torgue@foss.st.com>

[ upstream commit: 8e71dfe46a4a1e9505b1a327470f879b63388968 ]

(cherry picked from commit 9d5ec2c9c5d5131e701447c5c32aaf6c688c6e01)
---
 dts/upstream/src/arm/st/stm32h7-pinctrl.dtsi | 13 +++++++++++++
 1 file changed, 13 insertions(+)

diff --git a/dts/upstream/src/arm/st/stm32h7-pinctrl.dtsi b/dts/upstream/src/arm/st/stm32h7-pinctrl.dtsi
index 96022afd016..8a6db484383 100644
--- a/dts/upstream/src/arm/st/stm32h7-pinctrl.dtsi
+++ b/dts/upstream/src/arm/st/stm32h7-pinctrl.dtsi
@@ -237,6 +237,19 @@
 		};
 	};
 
+	usart1_pins_b: usart1-1 {
+		pins1 {
+			pinmux = <STM32_PINMUX('A', 9, AF7)>; /* USART1_TX */
+			bias-disable;
+			drive-push-pull;
+			slew-rate = <0>;
+		};
+		pins2 {
+			pinmux = <STM32_PINMUX('A', 10, AF7)>; /* USART1_RX */
+			bias-disable;
+		};
+	};
+
 	usart2_pins_a: usart2-0 {
 		pins1 {
 			pinmux = <STM32_PINMUX('D', 5, AF7)>; /* USART2_TX */
-- 
2.47.2