32 lines
1.1 KiB
Plaintext
32 lines
1.1 KiB
Plaintext
|
SPS (Smart Peripheral Switch) may be used as a DMA engine to move data
|
||
|
|
in either the Peripheral-to-Peripheral (a.k.a. BAM-to-BAM) mode or the
|
||
|
|
Peripheral-to-Memory (a.k.a. BAM-System) mode. SPS includes BAM (Bus
|
||
|
|
Access Module) hardware block, BAM DMA peripheral, and pipe memory.
|
||
|
|
|
||
|
|
Required property:
|
||
|
|
- compatible: should be "qcom,msm_sps"
|
||
|
|
|
||
|
|
Optional properties:
|
||
|
|
- reg: offset and size of the register set in the memory map
|
||
|
|
- interrupts: IRQ line
|
||
|
|
- qcom,device-type: specify the device configuration of BAM DMA and
|
||
|
|
pipe memory. Can be one of
|
||
|
|
1 - With BAM DMA and without pipe memory
|
||
|
|
2 - With BAM DMA and with pipe memory
|
||
|
|
3 - Without BAM DMA and without pipe memory
|
||
|
|
- qcom,pipe-attr-ee: BAM pipes are attributed to a specific EE, with
|
||
|
|
which we can know the pipes belong to apps side and can have the
|
||
|
|
error interrupts at the pipe level.
|
||
|
|
|
||
|
|
Example:
|
||
|
|
|
||
|
|
qcom,sps@f9980000 {
|
||
|
|
compatible = "qcom,msm_sps";
|
||
|
|
reg = <0xf9984000 0x15000>,
|
||
|
|
<0xf9999000 0xb000>,
|
||
|
|
<0xfe803000 0x4800>;
|
||
|
|
interrupts = <0 94 0>;
|
||
|
|
qcom,device-type = <2>;
|
||
|
|
qcom,pipe-attr-ee;
|
||
|
|
};
|