51 lines
1.6 KiB
Plaintext
Executable file
51 lines
1.6 KiB
Plaintext
Executable file
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.
|
|
- qcom,controlled-remotely : optional, indicates that the bam is controlled by
|
|
remote proccessor i.e. execution environment.
|
|
- num-channels : optional, indicates supported number of DMA channels in a
|
|
remotely controlled bam.
|
|
- qcom,num-ees : optional, indicates supported number of Execution Environments
|
|
in a remotely controlled bam.
|
|
|
|
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";
|
|
};
|