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50 lines
1.6 KiB
50 lines
1.6 KiB
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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