1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
|
QCOM BAM DMA controller
Required properties:
- compatible: must be one of the following:
* "qcom,bam-v1.4.0" for MSM8974, APQ8074 and APQ8084
* "qcom,bam-v1.3.0" for APQ8064, IPQ8064 and MSM8960
* "qcom,bam-v1.7.0" for MSM8916
- 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";
};
|
