ARM: dts: Add stm32mp257f-dk-u-boot.dtsi

Add U-Boot support for stm32mp257f-dk board.

Signed-off-by: Patrice Chotard <patrice.chotard@foss.st.com>
Reviewed-by: Patrick Delaunay <patrick.delaunay@foss.st.com>

diff --git a/arch/arm/dts/stm32mp257f-dk-u-boot.dtsi b/arch/arm/dts/stm32mp257f-dk-u-boot.dtsi
new file mode 100644 (file)
index 0000000..fe3fe9c
--- /dev/null
+++ b/arch/arm/dts/stm32mp257f-dk-u-boot.dtsi
@@ -0,0 +1,26 @@
+// SPDX-License-Identifier: GPL-2.0-or-later OR BSD-3-Clause
+/*
+ * Copyright (C) STMicroelectronics 2025 - All Rights Reserved
+ */
+
+#include "stm32mp25-u-boot.dtsi"
+
+/ {
+       config {
+               u-boot,mmc-env-partition = "u-boot-env";
+       };
+};
+
+&usart2 {
+       bootph-all;
+};
+
+&usart2_pins_a {
+       bootph-all;
+       pins1 {
+               bootph-all;
+       };
+       pins2 {
+               bootph-all;
+       };
+};