projects / deliverable / linux.git / blame
| Commit | Line | Data |
|---|---|---|
| cca946ea AG |
1 | QCOM BAM DMA controller |
| 2 | ||
| 3 | Required properties: | |
| ce940638 AT |
4 | - compatible: must be one of the following: |
| 5 | * "qcom,bam-v1.4.0" for MSM8974, APQ8074 and APQ8084 | |
| 6 | * "qcom,bam-v1.3.0" for APQ8064, IPQ8064 and MSM8960 | |
| d51da4d4 | 7 | * "qcom,bam-v1.7.0" for MSM8916 |
| cca946ea AG |
8 | - reg: Address range for DMA registers |
| 9 | - interrupts: Should contain the one interrupt shared by all channels | |
| 10 | - #dma-cells: must be <1>, the cell in the dmas property of the client device | |
| 11 | represents the channel number | |
| 12 | - clocks: required clock | |
| 13 | - clock-names: must contain "bam_clk" entry | |
| 14 | - qcom,ee : indicates the active Execution Environment identifier (0-7) used in | |
| 15 | the secure world. | |
| 16 | ||
| 17 | Example: | |
| 18 | ||
| 19 | uart-bam: dma@f9984000 = { | |
| 20 | compatible = "qcom,bam-v1.4.0"; | |
| 21 | reg = <0xf9984000 0x15000>; | |
| 22 | interrupts = <0 94 0>; | |
| 23 | clocks = <&gcc GCC_BAM_DMA_AHB_CLK>; | |
| 24 | clock-names = "bam_clk"; | |
| 25 | #dma-cells = <1>; | |
| 26 | qcom,ee = <0>; | |
| 27 | }; | |
| 28 | ||
| 29 | DMA clients must use the format described in the dma.txt file, using a two cell | |
| 30 | specifier for each channel. | |
| 31 | ||
| 32 | Example: | |
| 33 | serial@f991e000 { | |
| 34 | compatible = "qcom,msm-uart"; | |
| 35 | reg = <0xf991e000 0x1000> | |
| 36 | <0xf9944000 0x19000>; | |
| 37 | interrupts = <0 108 0>; | |
| 38 | clocks = <&gcc GCC_BLSP1_UART2_APPS_CLK>, | |
| 39 | <&gcc GCC_BLSP1_AHB_CLK>; | |
| 40 | clock-names = "core", "iface"; | |
| 41 | ||
| 42 | dmas = <&uart-bam 0>, <&uart-bam 1>; | |
| 43 | dma-names = "rx", "tx"; | |
| 44 | }; |