diff options
Diffstat (limited to 'Documentation/devicetree/bindings/soc/qcom')
3 files changed, 89 insertions, 3 deletions
diff --git a/Documentation/devicetree/bindings/soc/qcom/qcom,aoss-qmp.txt b/Documentation/devicetree/bindings/soc/qcom/qcom,aoss-qmp.txt new file mode 100644 index 000000000000..954ffee0a9c4 --- /dev/null +++ b/Documentation/devicetree/bindings/soc/qcom/qcom,aoss-qmp.txt @@ -0,0 +1,81 @@ +Qualcomm Always-On Subsystem side channel binding + +This binding describes the hardware component responsible for side channel +requests to the always-on subsystem (AOSS), used for certain power management +requests that is not handled by the standard RPMh interface. Each client in the +SoC has it's own block of message RAM and IRQ for communication with the AOSS. +The protocol used to communicate in the message RAM is known as Qualcomm +Messaging Protocol (QMP) + +The AOSS side channel exposes control over a set of resources, used to control +a set of debug related clocks and to affect the low power state of resources +related to the secondary subsystems. These resources are exposed as a set of +power-domains. + +- compatible: + Usage: required + Value type: <string> + Definition: must be "qcom,sdm845-aoss-qmp" + +- reg: + Usage: required + Value type: <prop-encoded-array> + Definition: the base address and size of the message RAM for this + client's communication with the AOSS + +- interrupts: + Usage: required + Value type: <prop-encoded-array> + Definition: should specify the AOSS message IRQ for this client + +- mboxes: + Usage: required + Value type: <prop-encoded-array> + Definition: reference to the mailbox representing the outgoing doorbell + in APCS for this client, as described in mailbox/mailbox.txt + +- #clock-cells: + Usage: optional + Value type: <u32> + Definition: must be 0 + The single clock represents the QDSS clock. + +- #power-domain-cells: + Usage: optional + Value type: <u32> + Definition: must be 1 + The provided power-domains are: + CDSP state (0), LPASS state (1), modem state (2), SLPI + state (3), SPSS state (4) and Venus state (5). + += SUBNODES +The AOSS side channel also provides the controls for three cooling devices, +these are expressed as subnodes of the QMP node. The name of the node is used +to identify the resource and must therefor be "cx", "mx" or "ebi". + +- #cooling-cells: + Usage: optional + Value type: <u32> + Definition: must be 2 + += EXAMPLE + +The following example represents the AOSS side-channel message RAM and the +mechanism exposing the power-domains, as found in SDM845. + + aoss_qmp: qmp@c300000 { + compatible = "qcom,sdm845-aoss-qmp"; + reg = <0x0c300000 0x100000>; + interrupts = <GIC_SPI 389 IRQ_TYPE_EDGE_RISING>; + mboxes = <&apss_shared 0>; + + #power-domain-cells = <1>; + + cx_cdev: cx { + #cooling-cells = <2>; + }; + + mx_cdev: mx { + #cooling-cells = <2>; + }; + }; diff --git a/Documentation/devicetree/bindings/soc/qcom/qcom,apr.txt b/Documentation/devicetree/bindings/soc/qcom/qcom,apr.txt index bcc612cc7423..db501269f47b 100644 --- a/Documentation/devicetree/bindings/soc/qcom/qcom,apr.txt +++ b/Documentation/devicetree/bindings/soc/qcom/qcom,apr.txt @@ -9,7 +9,7 @@ used for audio/voice services on the QDSP. Value type: <stringlist> Definition: must be "qcom,apr-v<VERSION-NUMBER>", example "qcom,apr-v2" -- reg +- qcom,apr-domain Usage: required Value type: <u32> Definition: Destination processor ID. @@ -49,9 +49,9 @@ by the individual bindings for the specific service The following example represents a QDSP based sound card on a MSM8996 device which uses apr as communication between Apps and QDSP. - apr@4 { + apr { compatible = "qcom,apr-v2"; - reg = <APR_DOMAIN_ADSP>; + qcom,apr-domain = <APR_DOMAIN_ADSP>; q6core@3 { compatible = "qcom,q6core"; diff --git a/Documentation/devicetree/bindings/soc/qcom/qcom,glink.txt b/Documentation/devicetree/bindings/soc/qcom/qcom,glink.txt index cf759e5f9b10..1214192847ac 100644 --- a/Documentation/devicetree/bindings/soc/qcom/qcom,glink.txt +++ b/Documentation/devicetree/bindings/soc/qcom/qcom,glink.txt @@ -21,6 +21,11 @@ edge. Definition: should specify the IRQ used by the remote processor to signal this processor about communication related events +- qcom,remote-pid: + Usage: required for glink-smem + Value type: <u32> + Definition: specifies the identifier of the remote endpoint of this edge + - qcom,rpm-msg-ram: Usage: required for glink-rpm Value type: <prop-encoded-array> |