tests/drivers/dma: add stm32mp257f_ev1 support

Add stm32mp257f_ev1 overlays and related configuration files for the
DMA tests. This includes support for:
* chan_blen_transfer
* chan_link_transfer
* cyclic
* loop_transfer
* scatter_gather

Signed-off-by: Youssef Zini <[email protected]>

Author: youssefz24

tests/drivers/dma/chan_blen_transfer/boards/stm32mp257f_ev1_stm32mp257fxx_m33.conf

@@ -0,0 +1,5 @@
+# Copyright (C) 2025 Savoir-faire Linux, Inc.
+# SPDX-License-Identifier: Apache-2.0
+
+CONFIG_DMA_TRANSFER_CHANNEL_NR_0=0
+CONFIG_DMA_TRANSFER_CHANNEL_NR_1=1

tests/drivers/dma/chan_blen_transfer/boards/stm32mp257f_ev1_stm32mp257fxx_m33.overlay

@@ -0,0 +1,9 @@
+/*
+ * Copyright (C) 2025 Savoir-faire Linux, Inc.
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ */
+
+tst_dma0: &hpdma3 {
+	status = "okay";
+};

tests/drivers/dma/chan_link_transfer/boards/stm32mp257f_ev1_stm32mp257fxx_m33.overlay

@@ -0,0 +1,9 @@
+/*
+ * Copyright (C) 2025 Savoir-faire Linux, Inc.
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ */
+
+dma0: &hpdma3 {
+	status = "okay";
+};

tests/drivers/dma/cyclic/boards/stm32mp257f_ev1_stm32mp257fxx_m33.overlay

@@ -0,0 +1,15 @@
+/*
+ * Copyright (C) 2025 Savoir-faire Linux, Inc.
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ */
+
+/ {
+	aliases {
+		dma0 = &hpdma3;
+	};
+};
+
+&hpdma3 {
+	status = "okay";
+};

tests/drivers/dma/loop_transfer/boards/stm32mp257f_ev1_stm32mp257fxx_m33.conf

@@ -0,0 +1,4 @@
+# Copyright (C) 2025 Savoir-faire Linux, Inc.
+# SPDX-License-Identifier: Apache-2.0
+
+CONFIG_DMA_LOOP_TRANSFER_CHANNEL_NR=0

tests/drivers/dma/loop_transfer/boards/stm32mp257f_ev1_stm32mp257fxx_m33.overlay

@@ -0,0 +1,9 @@
+/*
+ * Copyright (C) 2025 Savoir-faire Linux, Inc.
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ */
+
+tst_dma0: &hpdma3 {
+	status = "okay";
+};

tests/drivers/dma/scatter_gather/boards/stm32mp257f_ev1_stm32mp257fxx_m33.conf

@@ -0,0 +1,4 @@
+# Copyright (C) 2025 Savoir-faire Linux, Inc.
+# SPDX-License-Identifier: Apache-2.0
+
+CONFIG_DMA_SG_CHANNEL_NR=0

tests/drivers/dma/scatter_gather/boards/stm32mp257f_ev1_stm32mp257fxx_m33.overlay

@@ -0,0 +1,15 @@
+/*
+ * Copyright (C) 2025 Savoir-faire Linux, Inc.
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ */
+
+/ {
+	aliases {
+		dma0 = &hpdma3;
+	};
+};
+
+&hpdma3 {
+	status = "okay";
+};