QE: Add ucc hdlc document to bindings
Add ucc hdlc document to Documentation/devicetree/bindings/powerpc/fsl/cpm_qe/network.txt Signed-off-by: Zhao Qiang <qiang.zhao@nxp.com> Acked-by: Rob Herring <robh@kernel.org> Signed-off-by: Scott Wood <oss@buserror.net>
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@ -41,3 +41,84 @@ Example:
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fsl,mdio-pin = <12>;
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fsl,mdc-pin = <13>;
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};
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* HDLC
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Currently defined compatibles:
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- fsl,ucc-hdlc
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Properties for fsl,ucc-hdlc:
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- rx-clock-name
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- tx-clock-name
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Usage: required
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Value type: <string>
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Definition : Must be "brg1"-"brg16" for internal clock source,
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Must be "clk1"-"clk24" for external clock source.
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- fsl,tdm-interface
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Usage: optional
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Value type: <empty>
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Definition : Specify that hdlc is based on tdm-interface
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The property below is dependent on fsl,tdm-interface:
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- fsl,rx-sync-clock
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Usage: required
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Value type: <string>
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Definition : Must be "none", "rsync_pin", "brg9-11" and "brg13-15".
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- fsl,tx-sync-clock
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Usage: required
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Value type: <string>
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Definition : Must be "none", "tsync_pin", "brg9-11" and "brg13-15".
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- fsl,tdm-framer-type
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Usage: required for tdm interface
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Value type: <string>
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Definition : "e1" or "t1".Now e1 and t1 are used, other framer types
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are not supported.
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- fsl,tdm-id
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Usage: required for tdm interface
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Value type: <u32>
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Definition : number of TDM ID
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- fsl,tx-timeslot-mask
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- fsl,rx-timeslot-mask
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Usage: required for tdm interface
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Value type: <u32>
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Definition : time slot mask for TDM operation. Indicates which time
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slots used for transmitting and receiving.
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- fsl,siram-entry-id
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Usage: required for tdm interface
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Value type: <u32>
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Definition : Must be 0,2,4...64. the number of TDM entry.
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- fsl,tdm-internal-loopback
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usage: optional for tdm interface
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value type: <empty>
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Definition : Internal loopback connecting on TDM layer.
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Example for tdm interface:
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ucc@2000 {
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compatible = "fsl,ucc-hdlc";
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rx-clock-name = "clk8";
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tx-clock-name = "clk9";
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fsl,rx-sync-clock = "rsync_pin";
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fsl,tx-sync-clock = "tsync_pin";
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fsl,tx-timeslot-mask = <0xfffffffe>;
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fsl,rx-timeslot-mask = <0xfffffffe>;
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fsl,tdm-framer-type = "e1";
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fsl,tdm-id = <0>;
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fsl,siram-entry-id = <0>;
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fsl,tdm-interface;
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};
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Example for hdlc without tdm interface:
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ucc@2000 {
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compatible = "fsl,ucc-hdlc";
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rx-clock-name = "brg1";
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tx-clock-name = "brg1";
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};
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