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