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>

2 files changed, 28 insertions, 5 deletions

diff --git a/Documentation/devicetree/bindings/dma/arm-pl330.txt b/Documentation/devicetree/bindings/dma/arm-pl330.txt
index 36e27d54260b..267565894db9 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 2e3b6efaf1a2..c774aae3f82d 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>;
                 };
         };