ARM: dts: stm32: add pin map for UART8 controller on stm32h743

Add a pin map configuration for using the UART8 controller on the
stm32h743 MCU.

Signed-off-by: Dario Binacchi <dario.binacchi@amarulasolutions.com>
Link: https://lore.kernel.org/r/20250427074404.3278732-7-dario.binacchi@amarulasolutions.com
Signed-off-by: Alexandre Torgue <alexandre.torgue@foss.st.com>
[ upstream commit: 47d16ab94b8e5e85aedba3cd22cfdf3877bf1dfb ]

(cherry picked from commit 59621a6472cd6eeb748ed6d6202a21d0f3cc5a83)

diff --git a/dts/upstream/src/arm/st/stm32h7-pinctrl.dtsi b/dts/upstream/src/arm/st/stm32h7-pinctrl.dtsi
index ad00c10..96022af 100644 (file)
--- a/dts/upstream/src/arm/st/stm32h7-pinctrl.dtsi
+++ b/dts/upstream/src/arm/st/stm32h7-pinctrl.dtsi
@@ -211,6 +211,19 @@
                };
        };
 
+       uart8_pins_a: uart8-0 {
+               pins1 {
+                       pinmux = <STM32_PINMUX('J', 8, AF8)>; /* UART8_TX */
+                       bias-disable;
+                       drive-push-pull;
+                       slew-rate = <0>;
+               };
+               pins2 {
+                       pinmux = <STM32_PINMUX('J', 9, AF8)>; /* UART8_RX */
+                       bias-disable;
+               };
+       };
+
        usart1_pins_a: usart1-0 {
                pins1 {
                        pinmux = <STM32_PINMUX('B', 14, AF4)>; /* USART1_TX */