boards: esp32c6_devkitc: Test files for DMA and UART async, doc update

Test files for DMA and UART async. esp32c6_devkitc doc update

Signed-off-by: Raffael Rostagno <[email protected]>

Author: Raffael Rostagno

boards/espressif/esp32c6_devkitc/doc/index.rst

@@ -100,6 +100,8 @@ Current Zephyr's ESP32-C6-DevKitC board supports the following features:
 +------------+------------+-------------------------------------+
 | SPI DMA    | on-chip    | spi                                 |
 +------------+------------+-------------------------------------+
+| GDMA       | on-chip    | dma                                 |
++------------+------------+-------------------------------------+
 
 System requirements
 *******************

boards/espressif/esp32c6_devkitc/esp32c6_devkitc.yaml

@@ -9,6 +9,7 @@ supported:
   - gpio
   - watchdog
   - uart
+  - dma
   - spi
 testing:
   ignore_tags:

tests/drivers/dma/loop_transfer/boards/esp32c6_devkitc.conf

@@ -0,0 +1,2 @@
+CONFIG_DMA_LOOP_TRANSFER_CHANNEL_NR=4
+CONFIG_DMA_LOOP_TRANSFER_SIZE=4094

tests/drivers/dma/loop_transfer/boards/esp32c6_devkitc.overlay

@@ -0,0 +1,11 @@
+/*
+ * Copyright (c) 2022 Espressif Systems (Shanghai) Co., Ltd.
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ */
+
+&dma {
+	status = "okay";
+};
+
+tst_dma0: &dma { };

tests/drivers/uart/uart_async_api/boards/esp32c6_devkitc.conf

@@ -0,0 +1,2 @@
+CONFIG_HEAP_MEM_POOL_SIZE=32768
+CONFIG_DMA=y

tests/drivers/uart/uart_async_api/boards/esp32c6_devkitc.overlay

@@ -0,0 +1,31 @@
+/*
+ * Copyright (c) 2022 Espressif Systems (Shanghai) Co., Ltd.
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ */
+
+&pinctrl {
+	uart1_test: uart1_test {
+		group1 {
+			pinmux = <UART1_TX_GPIO2>;
+			input-enable;   /* Connect GPIO2 and GPIO3 externally for testing */
+		};
+		group2 {
+			pinmux = <UART1_RX_GPIO3>;
+			output-enable;  /* Connect GPIO2 and GPIO3 externally for testing */
+		};
+	};
+};
+
+dut: &uart1 {
+	status = "okay";
+	current-speed = <115200>;
+	pinctrl-0 = <&uart1_test>;
+	pinctrl-names = "default";
+	dmas = <&dma 0>, <&dma 1>;
+	dma-names = "rx", "tx";
+};
+
+&dma {
+	status = "okay";
+};