62 lines
1.8 KiB
Plaintext
62 lines
1.8 KiB
Plaintext
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* Freescale QUICC Engine module (QE)
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This represents qe module that is installed on PowerQUICC II Pro.
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NOTE: This is an interim binding; it should be updated to fit
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in with the CPM binding later in this document.
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Basically, it is a bus of devices, that could act more or less
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as a complete entity (UCC, USB etc ). All of them should be siblings on
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the "root" qe node, using the common properties from there.
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The description below applies to the qe of MPC8360 and
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more nodes and properties would be extended in the future.
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i) Root QE device
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Required properties:
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- compatible : should be "fsl,qe";
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- model : precise model of the QE, Can be "QE", "CPM", or "CPM2"
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- reg : offset and length of the device registers.
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- bus-frequency : the clock frequency for QUICC Engine.
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- fsl,qe-num-riscs: define how many RISC engines the QE has.
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- fsl,qe-num-snums: define how many serial number(SNUM) the QE can use for the
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threads.
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Recommended properties
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- brg-frequency : the internal clock source frequency for baud-rate
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generators in Hz.
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Example:
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qe@e0100000 {
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#address-cells = <1>;
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#size-cells = <1>;
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#interrupt-cells = <2>;
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compatible = "fsl,qe";
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ranges = <0 e0100000 00100000>;
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reg = <e0100000 480>;
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brg-frequency = <0>;
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bus-frequency = <179A7B00>;
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}
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* Multi-User RAM (MURAM)
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Required properties:
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- compatible : should be "fsl,qe-muram", "fsl,cpm-muram".
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- mode : the could be "host" or "slave".
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- ranges : Should be defined as specified in 1) to describe the
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translation of MURAM addresses.
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- data-only : sub-node which defines the address area under MURAM
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bus that can be allocated as data/parameter
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Example:
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muram@10000 {
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compatible = "fsl,qe-muram", "fsl,cpm-muram";
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ranges = <0 00010000 0000c000>;
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data-only@0{
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compatible = "fsl,qe-muram-data",
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"fsl,cpm-muram-data";
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reg = <0 c000>;
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};
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};
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