soc: silabs: efr32xg23: add DMA support

Added DMA support to efr32xg23 socs and boards containing them.

Signed-off-by: Yishai Jaffe <yishai1999@gmail.com>

boards/silabs/radio_boards/xg23_rb4210a/doc/index.rst

@@ -53,6 +53,8 @@ The board configuration supports the following hardware features:
 +-----------+------------+-------------------------------------+
 | UART      | on-chip    | serial                              |
 +-----------+------------+-------------------------------------+
+| DMA       | on-chip    | ldma                                |
++-----------+------------+-------------------------------------+
 | I2C       | on-chip    | i2c                                 |
 +-----------+------------+-------------------------------------+
 | SPI       | on-chip    | spi                                 |

boards/silabs/radio_boards/xg23_rb4210a/xg23_rb4210a.yaml

@@ -19,6 +19,7 @@ supported:
   - pinctrl
   - spi
   - uart
+  - dma
   - watchdog
 testing:
   ignore_tags:

dts/arm/silabs/efr32xg23.dtsi

@@ -424,6 +424,15 @@
 			reg = <0x5003c440 0xbc0>;
 		};
 
+		dma0: dma@50040000{
+			compatible = "silabs,ldma";
+			reg = <0x50040000 0x4000>;
+			interrupts = <22 0>;
+			#dma-cells = <3>;
+			dma_channels = <8>;
+			status = "disabled";
+		};
+
 		wdog0: wdog@5b004000 {
 			compatible = "silabs,gecko-wdog";
 			reg = <0x5b004000 0x4000>;

tests/drivers/dma/chan_blen_transfer/boards/xg23_rb4210a.overlay

@@ -0,0 +1,11 @@
+/*
+ * Copyright (c) 2024 Silicon Laboratories, Inc.
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ */
+
+&dma0 {
+	status = "okay";
+};
+
+tst_dma0: &dma0 { };

tests/drivers/dma/loop_transfer/boards/xg23_rb4210a.conf

@@ -0,0 +1,5 @@
+# Copyright (c) 2024 Silicon Laboratories, Inc.
+# SPDX-License-Identifier: Apache-2.0
+
+CONFIG_DMA_LOOP_TRANSFER_CHANNEL_NR=0
+CONFIG_DMA_LOOP_TRANSFER_SIZE=2048

tests/drivers/dma/loop_transfer/boards/xg23_rb4210a.overlay

@@ -0,0 +1,11 @@
+/*
+ * Copyright (c) 2024 Silicon Laboratories, Inc.
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ */
+
+&dma0 {
+	status = "okay";
+};
+
+tst_dma0: &dma0 { };

tests/drivers/dma/scatter_gather/boards/xg23_rb4210a.conf

@@ -0,0 +1,4 @@
+# Copyright (c) 2024 Silicon Laboratories, Inc.
+# SPDX-License-Identifier: Apache-2.0
+
+CONFIG_DMA_SG_CHANNEL_NR=0

tests/drivers/dma/scatter_gather/boards/xg23_rb4210a.overlay

@@ -0,0 +1,15 @@
+/*
+ * Copyright (c) 2024 Silicon Laboratories, Inc.
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ */
+
+/ {
+	aliases {
+		dma0 = &dma0;
+	};
+};
+
+&dma0 {
+	status = "okay";
+};