dts: esp32c3: add bindings to GDMA

Add GDMA node to esp32c3.

Signed-off-by: Lucas Tamborrino <[email protected]>

Author: LucasTambor

dts/bindings/dma/espressif,esp32-gdma.yaml

@@ -0,0 +1,33 @@
+# Copyright (c) 2022 Espressif Systems (Shanghai) Co., Ltd.
+# SPDX-License-Identifier: Apache-2.0
+
+description: |
+  Espressif's GDMA (General Direct Memory Access) Node
+
+  General Direct Memory Access (GDMA) is a feature that allows
+  peripheral-to-memory, memory-to-peripheral, and memory-to-memory
+  data transfer at a high speed.
+
+  The GDMA controller in ESP32-C3 has six independent channels,
+  three transmit channels and three receive channels.
+
+  Every channel can be connected to different peripherals.
+
+  Peripherals with GDMA:
+  * SPI2
+  * UHCI0 (UART0/UART1)
+  * I2S
+  * AES
+  * SHA
+  * ADC
+
+compatible: "espressif,esp32-gdma"
+
+include: dma-controller.yaml
+
+properties:
+  "#dma-cells":
+    const: 1
+
+dma-cells:
+  - channel

dts/riscv/espressif/esp32c3.dtsi

@@ -249,6 +249,18 @@
 			status = "disabled";
 		};
 
+		dma: dma@6003f000 {
+			compatible = "espressif,esp32-gdma";
+			reg = <0x6003f000 DT_SIZE_K(4)>;
+			#dma-cells = <1>;
+			interrupts = <DMA_CH0_INTR_SOURCE DMA_CH1_INTR_SOURCE DMA_CH2_INTR_SOURCE>;
+			interrupt-parent = <&intc>;
+			clocks = <&rtc ESP32_GDMA_MODULE>;
+			dma-channels = <6>;
+			dma-buf-addr-alignment = <4>;
+			status = "disabled";
+		};
+
 	};
 
 };