51 lines
1.6 KiB
Plaintext
51 lines
1.6 KiB
Plaintext
QCOM BAM DMA controller
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Required properties:
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- compatible: must be one of the following:
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* "qcom,bam-v1.4.0" for MSM8974, APQ8074 and APQ8084
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* "qcom,bam-v1.3.0" for APQ8064, IPQ8064 and MSM8960
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* "qcom,bam-v1.7.0" for MSM8916
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- reg: Address range for DMA registers
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- interrupts: Should contain the one interrupt shared by all channels
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- #dma-cells: must be <1>, the cell in the dmas property of the client device
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represents the channel number
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- clocks: required clock
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- clock-names: must contain "bam_clk" entry
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- qcom,ee : indicates the active Execution Environment identifier (0-7) used in
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the secure world.
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- qcom,controlled-remotely : optional, indicates that the bam is controlled by
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remote proccessor i.e. execution environment.
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- num-channels : optional, indicates supported number of DMA channels in a
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remotely controlled bam.
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- qcom,num-ees : optional, indicates supported number of Execution Environments
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in a remotely controlled bam.
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Example:
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uart-bam: dma@f9984000 = {
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compatible = "qcom,bam-v1.4.0";
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reg = <0xf9984000 0x15000>;
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interrupts = <0 94 0>;
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clocks = <&gcc GCC_BAM_DMA_AHB_CLK>;
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clock-names = "bam_clk";
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#dma-cells = <1>;
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qcom,ee = <0>;
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};
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DMA clients must use the format described in the dma.txt file, using a two cell
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specifier for each channel.
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Example:
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serial@f991e000 {
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compatible = "qcom,msm-uart";
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reg = <0xf991e000 0x1000>
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<0xf9944000 0x19000>;
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interrupts = <0 108 0>;
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clocks = <&gcc GCC_BLSP1_UART2_APPS_CLK>,
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<&gcc GCC_BLSP1_AHB_CLK>;
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clock-names = "core", "iface";
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dmas = <&uart-bam 0>, <&uart-bam 1>;
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dma-names = "rx", "tx";
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};
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