dt-bindings: Add devicetree bindings

Add snapshot of device tree bindings from keystone common kernel, branch
"android-mainline-keystone-qcom-release" at c4c12103f9c0 ("Snap for 9228065
from e32903b9a63bb558df8b803b076619c53c16baad to
android-mainline-keystone-qcom-release").

Change-Id: I7682079615cbd9f29340a5c1f2a1d84ec441a1f1
Signed-off-by: Melody Olvera <quic_molvera@quicinc.com>

bindings/dma/mmp-dma.txt

@@ -0,0 +1,81 @@
+* MARVELL MMP DMA controller
+
+Marvell Peripheral DMA Controller
+Used platforms: pxa688, pxa910, pxa3xx, etc
+
+Required properties:
+- compatible: Should be "marvell,pdma-1.0"
+- reg: Should contain DMA registers location and length.
+- interrupts: Either contain all of the per-channel DMA interrupts
+		or one irq for pdma device
+
+Optional properties:
+- dma-channels: Number of DMA channels supported by the controller (defaults
+  to 32 when not specified)
+- #dma-channels: deprecated
+- dma-requests: Number of DMA requestor lines supported by the controller
+  (defaults to 32 when not specified)
+- #dma-requests: deprecated
+
+"marvell,pdma-1.0"
+Used platforms: pxa25x, pxa27x, pxa3xx, pxa93x, pxa168, pxa910, pxa688.
+
+Examples:
+
+/*
+ * Each channel has specific irq
+ * ICU parse out irq channel from ICU register,
+ * while DMA controller may not able to distinguish the irq channel
+ * Using this method, interrupt-parent is required as demuxer
+ * For example, pxa688 icu register 0x128, bit 0~15 is PDMA channel irq,
+ * 18~21 is ADMA irq
+ */
+pdma: dma-controller@d4000000 {
+	      compatible = "marvell,pdma-1.0";
+	      reg = <0xd4000000 0x10000>;
+	      interrupts = <0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15>;
+	      interrupt-parent = <&intcmux32>;
+	      dma-channels = <16>;
+      };
+
+/*
+ * One irq for all channels
+ * Dmaengine driver (DMA controller) distinguish irq channel via
+ * parsing internal register
+ */
+pdma: dma-controller@d4000000 {
+	      compatible = "marvell,pdma-1.0";
+	      reg = <0xd4000000 0x10000>;
+	      interrupts = <47>;
+	      dma-channels = <16>;
+      };
+
+
+Marvell Two Channel DMA Controller used specifically for audio
+Used platforms: pxa688, pxa910
+
+Required properties:
+- compatible: Should be "marvell,adma-1.0" or "marvell,pxa910-squ"
+- reg: Should contain DMA registers location and length.
+- interrupts: Either contain all of the per-channel DMA interrupts
+		or one irq for dma device
+
+"marvell,adma-1.0" used on pxa688
+"marvell,pxa910-squ" used on pxa910
+
+Examples:
+
+/* each channel has specific irq */
+adma0: dma-controller@d42a0800 {
+	      compatible = "marvell,adma-1.0";
+	      reg = <0xd42a0800 0x100>;
+	      interrupts = <18 19>;
+	      interrupt-parent = <&intcmux32>;
+      };
+
+/* One irq for all channels */
+squ: dma-controller@d42a0800 {
+	      compatible = "marvell,pxa910-squ";
+	      reg = <0xd42a0800 0x100>;
+	      interrupts = <46>;
+      };