ARM: EXYNOS: mark the DMA channel binding for SPI as preliminary

Bindings for DMA channels are still under discussion and will
change once this has been resolved. Therefore we mark them
the newly added ones as preliminary. Let's hope nobody starts
relying on them...
Signed-off-by: Arnd Bergmann <arnd@arndb.de>

Documentation/devicetree/bindings/spi/spi-samsung.txt

@@ -18,6 +18,9 @@ Required SoC Specific Properties:
 - interrupts: The interrupt number to the cpu. The interrupt specifier format
   depends on the interrupt controller.
 
+[PRELIMINARY: the dma channel allocation will change once there are
+official DMA bindings]
+
 - tx-dma-channel: The dma channel specifier for tx operations. The format of
   the dma specifier depends on the dma controller.
 

arch/arm/boot/dts/exynos4210.dtsi

@@ -168,8 +168,8 @@ spi_0: spi@13920000 {
 		compatible = "samsung,exynos4210-spi";
 		reg = <0x13920000 0x100>;
 		interrupts = <0 66 0>;
-		tx-dma-channel = <&pdma0 7>;
-		rx-dma-channel = <&pdma0 6>;
+		tx-dma-channel = <&pdma0 7>; /* preliminary */
+		rx-dma-channel = <&pdma0 6>; /* preliminary */
 		#address-cells = <1>;
 		#size-cells = <0>;
 	};
@@ -178,8 +178,8 @@ spi_1: spi@13930000 {
 		compatible = "samsung,exynos4210-spi";
 		reg = <0x13930000 0x100>;
 		interrupts = <0 67 0>;
-		tx-dma-channel = <&pdma1 7>;
-		rx-dma-channel = <&pdma1 6>;
+		tx-dma-channel = <&pdma1 7>; /* preliminary */
+		rx-dma-channel = <&pdma1 6>; /* preliminary */
 		#address-cells = <1>;
 		#size-cells = <0>;
 	};
@@ -188,8 +188,8 @@ spi_2: spi@13940000 {
 		compatible = "samsung,exynos4210-spi";
 		reg = <0x13940000 0x100>;
 		interrupts = <0 68 0>;
-		tx-dma-channel = <&pdma0 9>;
-		rx-dma-channel = <&pdma0 8>;
+		tx-dma-channel = <&pdma0 9>; /* preliminary */
+		rx-dma-channel = <&pdma0 8>; /* preliminary */
 		#address-cells = <1>;
 		#size-cells = <0>;
 	};

arch/arm/boot/dts/exynos5250.dtsi

@@ -156,8 +156,8 @@ spi_0: spi@12d20000 {
 		compatible = "samsung,exynos4210-spi";
 		reg = <0x12d20000 0x100>;
 		interrupts = <0 66 0>;
-		tx-dma-channel = <&pdma0 5>;
-		rx-dma-channel = <&pdma0 4>;
+		tx-dma-channel = <&pdma0 5>; /* preliminary */
+		rx-dma-channel = <&pdma0 4>; /* preliminary */
 		#address-cells = <1>;
 		#size-cells = <0>;
 	};
@@ -166,8 +166,8 @@ spi_1: spi@12d30000 {
 		compatible = "samsung,exynos4210-spi";
 		reg = <0x12d30000 0x100>;
 		interrupts = <0 67 0>;
-		tx-dma-channel = <&pdma1 5>;
-		rx-dma-channel = <&pdma1 4>;
+		tx-dma-channel = <&pdma1 5>; /* preliminary */
+		rx-dma-channel = <&pdma1 4>; /* preliminary */
 		#address-cells = <1>;
 		#size-cells = <0>;
 	};
@@ -176,8 +176,8 @@ spi_2: spi@12d40000 {
 		compatible = "samsung,exynos4210-spi";
 		reg = <0x12d40000 0x100>;
 		interrupts = <0 68 0>;
-		tx-dma-channel = <&pdma0 7>;
-		rx-dma-channel = <&pdma0 6>;
+		tx-dma-channel = <&pdma0 7>; /* preliminary */
+		rx-dma-channel = <&pdma0 6>; /* preliminary */
 		#address-cells = <1>;
 		#size-cells = <0>;
 	};