From: Zhangfei Gao <zhangfei.gao@marvell.com>
Date: Mon, 3 Sep 2012 03:03:47 +0000 (+0800)
Subject: ARM: dt: mmp-dma: add binding file
X-Git-Tag: firefly_0821_release~3680^2~1963^2~3^2
X-Git-Url: http://demsky.eecs.uci.edu/git/?a=commitdiff_plain;h=37586e0b9cadd1072196c3cca8ea8559b91b1605;p=firefly-linux-kernel-4.4.55.git

ARM: dt: mmp-dma: add binding file

Signed-off-by: Zhangfei Gao <zhangfei.gao@marvell.com>
Acked-by: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Haojian Zhuang <haojian.zhuang@gmail.com>
---

diff --git a/Documentation/devicetree/bindings/dma/mmp-dma.txt b/Documentation/devicetree/bindings/dma/mmp-dma.txt
new file mode 100644
index 000000000000..a4fa4efa1d83
--- /dev/null
+++ b/Documentation/devicetree/bindings/dma/mmp-dma.txt
@@ -0,0 +1,74 @@
+* MARVELL MMP DMA controller
+
+Marvell Peripheral DMA Controller
+Used platfroms: 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
+- #dma-channels: Number of DMA channels supported by the controller.
+
+"marvell,pdma-1.0"
+Used platfroms: 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 platfroms: 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>;
+      };