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Diffstat (limited to 'Documentation/devicetree')
| -rw-r--r-- | Documentation/devicetree/bindings/dma/qcom_bam_dma.txt | 41 |
1 files changed, 41 insertions, 0 deletions
diff --git a/Documentation/devicetree/bindings/dma/qcom_bam_dma.txt b/Documentation/devicetree/bindings/dma/qcom_bam_dma.txt new file mode 100644 index 000000000000..d75a9d767022 --- /dev/null +++ b/Documentation/devicetree/bindings/dma/qcom_bam_dma.txt @@ -0,0 +1,41 @@ +QCOM BAM DMA controller + +Required properties: +- compatible: must contain "qcom,bam-v1.4.0" for MSM8974 +- reg: Address range for DMA registers +- interrupts: Should contain the one interrupt shared by all channels +- #dma-cells: must be <1>, the cell in the dmas property of the client device + represents the channel number +- clocks: required clock +- clock-names: must contain "bam_clk" entry +- qcom,ee : indicates the active Execution Environment identifier (0-7) used in + the secure world. + +Example: + + uart-bam: dma@f9984000 = { + compatible = "qcom,bam-v1.4.0"; + reg = <0xf9984000 0x15000>; + interrupts = <0 94 0>; + clocks = <&gcc GCC_BAM_DMA_AHB_CLK>; + clock-names = "bam_clk"; + #dma-cells = <1>; + qcom,ee = <0>; + }; + +DMA clients must use the format described in the dma.txt file, using a two cell +specifier for each channel. + +Example: + serial@f991e000 { + compatible = "qcom,msm-uart"; + reg = <0xf991e000 0x1000> + <0xf9944000 0x19000>; + interrupts = <0 108 0>; + clocks = <&gcc GCC_BLSP1_UART2_APPS_CLK>, + <&gcc GCC_BLSP1_AHB_CLK>; + clock-names = "core", "iface"; + + dmas = <&uart-bam 0>, <&uart-bam 1>; + dma-names = "rx", "tx"; + }; |