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Diffstat (limited to 'Documentation/devicetree/bindings/soc/qcom/qcom,smd.txt')
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diff --git a/Documentation/devicetree/bindings/soc/qcom/qcom,smd.txt b/Documentation/devicetree/bindings/soc/qcom/qcom,smd.txt deleted file mode 100644 index 234ae2256501..000000000000 --- a/Documentation/devicetree/bindings/soc/qcom/qcom,smd.txt +++ /dev/null @@ -1,98 +0,0 @@ -Qualcomm Shared Memory Driver (SMD) binding - -This binding describes the Qualcomm Shared Memory Driver, a fifo based -communication channel for sending data between the various subsystems in -Qualcomm platforms. - -- compatible: - Usage: required - Value type: <stringlist> - Definition: must be "qcom,smd" - -= EDGES - -Each subnode of the SMD node represents a remote subsystem or a remote -processor of some sort - or in SMD language an "edge". The name of the edges -are not important. -The edge is described by the following properties: - -- interrupts: - Usage: required - Value type: <prop-encoded-array> - Definition: should specify the IRQ used by the remote processor to - signal this processor about communication related updates - -- mboxes: - Usage: required - Value type: <prop-encoded-array> - Definition: reference to the associated doorbell in APCS, as described - in mailbox/mailbox.txt - -- qcom,ipc: - Usage: required, unless mboxes is specified - Value type: <prop-encoded-array> - Definition: three entries specifying the outgoing ipc bit used for - signaling the remote processor: - - phandle to a syscon node representing the apcs registers - - u32 representing offset to the register within the syscon - - u32 representing the ipc bit within the register - -- qcom,smd-edge: - Usage: required - Value type: <u32> - Definition: the identifier of the remote processor in the smd channel - allocation table - -- qcom,remote-pid: - Usage: optional - Value type: <u32> - Definition: the identifier for the remote processor as known by the rest - of the system. - -- label: - Usage: optional - Value type: <string> - Definition: name of the edge, used for debugging and identification - purposes. The node name will be used if this is not - present. - -= SMD DEVICES - -In turn, subnodes of the "edges" represent devices tied to SMD channels on that -"edge". The names of the devices are not important. The properties of these -nodes are defined by the individual bindings for the SMD devices - but must -contain the following property: - -- qcom,smd-channels: - Usage: required - Value type: <stringlist> - Definition: a list of channels tied to this device, used for matching - the device to channels - -= EXAMPLE - -The following example represents a smd node, with one edge representing the -"rpm" subsystem. For the "rpm" subsystem we have a device tied to the -"rpm_request" channel. - - apcs: syscon@f9011000 { - compatible = "syscon"; - reg = <0xf9011000 0x1000>; - }; - - smd { - compatible = "qcom,smd"; - - rpm { - interrupts = <0 168 1>; - qcom,ipc = <&apcs 8 0>; - qcom,smd-edge = <15>; - - rpm_requests { - compatible = "qcom,rpm-msm8974"; - qcom,smd-channels = "rpm_requests"; - - ... - }; - }; - }; |