Add STM32MP257F Evaluation board support. It embeds a STM32MP257FAI SoC,
with 4GB of DDR4, TSN switch (2+1 ports), 2*USB typeA, 1*USB2 typeC,
SNOR OctoSPI, mini PCIe, STPMIC2 for power distribution ...
Signed-off-by: Alexandre Torgue <alexandre.torgue@xxxxxxxxxxx>
diff --git a/arch/arm64/boot/dts/Makefile b/arch/arm64/boot/dts/Makefile
index 7b107fa7414b..30dd6347a929 100644
--- a/arch/arm64/boot/dts/Makefile
+++ b/arch/arm64/boot/dts/Makefile
@@ -27,6 +27,7 @@ subdir-y += renesas
subdir-y += rockchip
subdir-y += socionext
subdir-y += sprd
+subdir-y += st
subdir-y += synaptics
subdir-y += tesla
subdir-y += ti
diff --git a/arch/arm64/boot/dts/st/Makefile b/arch/arm64/boot/dts/st/Makefile
new file mode 100644
index 000000000000..881fe1296c58
--- /dev/null
+++ b/arch/arm64/boot/dts/st/Makefile
@@ -0,0 +1,2 @@
+# SPDX-License-Identifier: GPL-2.0-only
+dtb-$(CONFIG_ARCH_STM32) += stm32mp257f-ev1.dtb
diff --git a/arch/arm64/boot/dts/st/stm32mp25-pinctrl.dtsi b/arch/arm64/boot/dts/st/stm32mp25-pinctrl.dtsi
index 5bd27767fbf5..d34a1d5e79c0 100644
--- a/arch/arm64/boot/dts/st/stm32mp25-pinctrl.dtsi
+++ b/arch/arm64/boot/dts/st/stm32mp25-pinctrl.dtsi
@@ -5,3 +5,34 @@
*/
#include <dt-bindings/pinctrl/stm32-pinfunc.h>
+&pinctrl {
+ usart2_pins_a: usart2-0 {
+ pins1 {
+ pinmux = <STM32_PINMUX('A', 4, AF6)>; /* USART2_TX */
+ bias-disable;
+ drive-push-pull;
+ slew-rate = <0>;
+ };
+ pins2 {
+ pinmux = <STM32_PINMUX('A', 8, AF8)>; /* USART2_RX */
+ bias-disable;
+ };
+ };
+
+ usart2_idle_pins_a: usart2-idle-0 {
+ pins1 {
+ pinmux = <STM32_PINMUX('A', 4, ANALOG)>; /* USART2_TX */
+ };
+ pins2 {
+ pinmux = <STM32_PINMUX('A', 8, AF8)>; /* USART2_RX */
+ bias-disable;
+ };
+ };
+
+ usart2_sleep_pins_a: usart2-sleep-0 {
+ pins {
+ pinmux = <STM32_PINMUX('A', 4, ANALOG)>, /* USART2_TX */
+ <STM32_PINMUX('A', 8, ANALOG)>; /* USART2_RX */
+ };
+ };
+};
diff --git a/arch/arm64/boot/dts/st/stm32mp257f-ev1.dts b/arch/arm64/boot/dts/st/stm32mp257f-ev1.dts
new file mode 100644
index 000000000000..39b4726cc098
--- /dev/null
+++ b/arch/arm64/boot/dts/st/stm32mp257f-ev1.dts
@@ -0,0 +1,50 @@
+// SPDX-License-Identifier: (GPL-2.0-or-later OR BSD-3-Clause)
+/*
+ * Copyright (C) STMicroelectronics 2023 - All Rights Reserved
+ * Author: Alexandre Torgue <alexandre.torgue@xxxxxxxxxxx> for STMicroelectronics.
+ */
+
+/dts-v1/;
+
+#include "stm32mp257.dtsi"
+#include "stm32mp25xf.dtsi"
+#include "stm32mp25-pinctrl.dtsi"
+#include "stm32mp25xxai-pinctrl.dtsi"
+
+/ {
+ model = "STMicroelectronics STM32MP257F-EV1 Evaluation Board";
+ compatible = "st,stm32mp257f-ev1", "st,stm32mp257";
+
+ aliases {
+ serial0 = &usart2;
+ };
+
+ chosen {
+ stdout-path = "serial0:115200n8";
+ };
+
+ memory@80000000 {
+ device_type = "memory";
+ reg = <0x0 0x80000000 0x1 0x0>;
+ };
+
+ reserved-memory {
+ #address-cells = <2>;
+ #size-cells = <2>;
+ ranges;
+
+ fw@80000000 {
+ compatible = "shared-dma-pool";
+ reg = <0x0 0x80000000 0x0 0x4000000>;
+ no-map;
+ };
+ };
+};
+
+&usart2 {
+ pinctrl-names = "default", "idle", "sleep";
+ pinctrl-0 = <&usart2_pins_a>;
+ pinctrl-1 = <&usart2_idle_pins_a>;
+ pinctrl-2 = <&usart2_sleep_pins_a>;
+ status = "okay";
+};
--
2.17.1
