bmips: bcm6348: add bcm6348-iudma support

Signed-off-by: NÁlvaro Fernández Rojas <noltari@gmail.com>

arch/mips/dts/brcm,bcm6348.dtsi

@@ -4,6 +4,7 @@
  */
 
 #include <dt-bindings/clock/bcm6348-clock.h>
+#include <dt-bindings/dma/bcm6348-dma.h>
 #include <dt-bindings/gpio/gpio.h>
 #include <dt-bindings/reset/bcm6348-reset.h>
 #include "skeleton.dtsi"
@@ -159,5 +160,20 @@
 			reg = <0xfffe2300 0x38>;
 			u-boot,dm-pre-reloc;
 		};
+
+		iudma: dma-controller@fffe7000 {
+			compatible = "brcm,bcm6348-iudma";
+			reg = <0xfffe7000 0x1c>,
+			      <0xfffe7100 0x40>,
+			      <0xfffe7200 0x40>;
+			reg-names = "dma",
+				    "dma-channels",
+				    "dma-sram";
+			#dma-cells = <1>;
+			dma-channels = <4>;
+			clocks = <&periph_clk BCM6348_CLK_ENET>;
+			resets = <&periph_rst BCM6348_RST_ENET>,
+				 <&periph_rst BCM6348_RST_DMAMEM>;
+		};
 	};
 };

include/dt-bindings/dma/bcm6348-dma.h

+// SPDX-License-Identifier: GPL-2.0+
+/*
+ * Copyright (C) 2018 Álvaro Fernández Rojas <noltari@gmail.com>
+ *
+ * Derived from linux/drivers/net/ethernet/broadcom/bcm63xx_enet.c
+ */
+
+#ifndef __DT_BINDINGS_DMA_BCM6348_H
+#define __DT_BINDINGS_DMA_BCM6348_H
+
+#define BCM6348_DMA_ENET0_RX	0
+#define BCM6348_DMA_ENET0_TX	1
+#define BCM6348_DMA_ENET1_RX	2
+#define BCM6348_DMA_ENET1_TX	3
+
+#endif /* __DT_BINDINGS_DMA_BCM6348_H */