From: Padmavathi Venna <padma.v@samsung.com>
Date: Thu, 14 Feb 2013 03:40:08 +0000 (+0530)
Subject: ARM: dts: pl330: Add #dma-cells for generic dma binding support
X-Git-Tag: upstream/snapshot3+hdmi~5581^2~3
X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=42cf20980cded7e0ecdd6dba74592d059c6a8bda;p=platform%2Fadaptation%2Frenesas_rcar%2Frenesas_kernel.git

ARM: dts: pl330: Add #dma-cells for generic dma binding support

This patch adds #dma-cells property to PL330 DMA controller
nodes for supporting generic dma dt bindings on samsung
exynos5250 platform.

Signed-off-by: Padmavathi Venna <padma.v@samsung.com>
Acked-by: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Vinod Koul <vinod.koul@intel.com>
---

diff --git a/Documentation/devicetree/bindings/dma/arm-pl330.txt b/Documentation/devicetree/bindings/dma/arm-pl330.txt
index 36e27d5..2675658 100644
--- a/Documentation/devicetree/bindings/dma/arm-pl330.txt
+++ b/Documentation/devicetree/bindings/dma/arm-pl330.txt
@@ -10,7 +10,11 @@ Required properties:
   - interrupts: interrupt number to the cpu.
 
 Optional properties:
-- dma-coherent      : Present if dma operations are coherent
+  - dma-coherent      : Present if dma operations are coherent
+  - #dma-cells: must be <1>. used to represent the number of integer
+    cells in the dmas property of client device.
+  - dma-channels: contains the total number of DMA channels supported by the DMAC
+  - dma-requests: contains the total number of DMA requests supported by the DMAC
 
 Example:
 
@@ -18,16 +22,23 @@ Example:
 		compatible = "arm,pl330", "arm,primecell";
 		reg = <0x12680000 0x1000>;
 		interrupts = <99>;
+		#dma-cells = <1>;
+		#dma-channels = <8>;
+		#dma-requests = <32>;
 	};
 
 Client drivers (device nodes requiring dma transfers from dev-to-mem or
-mem-to-dev) should specify the DMA channel numbers using a two-value pair
+mem-to-dev) should specify the DMA channel numbers and dma channel names
 as shown below.
 
   [property name]  = <[phandle of the dma controller] [dma request id]>;
+  [property name]  = <[dma channel name]>
 
       where 'dma request id' is the dma request number which is connected
-      to the client controller. The 'property name' is recommended to be
-      of the form <name>-dma-channel.
+      to the client controller. The 'property name' 'dmas' and 'dma-names'
+      as required by the generic dma device tree binding helpers. The dma
+      names correspond 1:1 with the dma request ids in the dmas property.
 
-  Example:  tx-dma-channel = <&pdma0 12>;
+  Example:  dmas = <&pdma0 12
+		    &pdma1 11>;
+	    dma-names = "tx", "rx";
diff --git a/arch/arm/boot/dts/exynos5250.dtsi b/arch/arm/boot/dts/exynos5250.dtsi
index 2e3b6ef..c774aae 100644
--- a/arch/arm/boot/dts/exynos5250.dtsi
+++ b/arch/arm/boot/dts/exynos5250.dtsi
@@ -280,24 +280,36 @@
 			compatible = "arm,pl330", "arm,primecell";
 			reg = <0x121A0000 0x1000>;
 			interrupts = <0 34 0>;
+			#dma-cells = <1>;
+			#dma-channels = <8>;
+			#dma-requests = <32>;
 		};
 
 		pdma1: pdma@121B0000 {
 			compatible = "arm,pl330", "arm,primecell";
 			reg = <0x121B0000 0x1000>;
 			interrupts = <0 35 0>;
+			#dma-cells = <1>;
+			#dma-channels = <8>;
+			#dma-requests = <32>;
 		};
 
 		mdma0: mdma@10800000 {
 			compatible = "arm,pl330", "arm,primecell";
 			reg = <0x10800000 0x1000>;
 			interrupts = <0 33 0>;
+			#dma-cells = <1>;
+			#dma-channels = <8>;
+			#dma-requests = <1>;
 		};
 
 		mdma1: mdma@11C10000 {
 			compatible = "arm,pl330", "arm,primecell";
 			reg = <0x11C10000 0x1000>;
 			interrupts = <0 124 0>;
+			#dma-cells = <1>;
+			#dma-channels = <8>;
+			#dma-requests = <1>;
 		};
 	};