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dt-bindings: interconnect: Update QTI SDM845 DT bindings

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Redefine the Network-on-Chip devices to more accurately describe
the interconnect topology on QTI's SDM845 platform. Each
interconnect device can communicate with different instances of the
RPMh hardware which are described as RSCs(Resource State Coordinators).

Change-Id: Icc4ad0410e98bef4a7acc786a19bb4048ae2b1a8
This commit is contained in:
David Dai 2019-09-27 18:48:42 -07:00
commit e993d2fe84
2 changed files with 68 additions and 9 deletions
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31
bindings/interconnect/qcom,bcm-voter.txt Normal file
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@ -0,0 +1,31 @@
QTI BCM-Voter interconnect driver binding
-----------------------------------------------------------
The Bus Clock Manager (BCM) is a dedicated hardware accelerator
that manages shared system resources by aggregating requests
from multiple Resource State Coordinators (RSC). Interconnect
providers are able to vote for aggregated thresholds values from
consumers by communicating through their respective RSCs.
Required properties :
- compatible : shall contain only one of the following:
"qcom,sdm845-bcm-voter",
"qcom,bcm-voter",
Examples:
apps_rsc: interconnect@179c0000 {
compatible = "qcom,rpmh-rsc";
apps_bcm_voter: bcm_voter {
compatible = "qcom,sdm845-bcm-voter";
};
}
disp_rsc: interconnect@179d0000 {
compatible = "qcom,rpmh-rsc";
disp_bcm_voter: bcm_voter {
compatible = "qcom,sdm845-bcm-voter";
};
}

46
bindings/interconnect/qcom,sdm845.txt
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@ -4,21 +4,49 @@ Qualcomm SDM845 Network-On-Chip interconnect driver binding
SDM845 interconnect providers support system bandwidth requirements through
RPMh hardware accelerators known as Bus Clock Manager (BCM). The provider is
able to communicate with the BCM through the Resource State Coordinator (RSC)
associated with each execution environment. Provider nodes must reside within
an RPMh device node pertaining to their RSC and each provider maps to a single
RPMh resource.
associated with each execution environment. Provider nodes must point to at
least one RPMh device child node pertaining to their RSC and each provider
can map to multiple RPMh resources.
Required properties :
- compatible : shall contain only one of the following:
"qcom,sdm845-rsc-hlos"
"qcom,sdm845-aggre1-noc",
"qcom,sdm845-aggre2-noc",
"qcom,sdm845-config-noc",
"qcom,sdm845-dc-noc",
"qcom,sdm845-gladiator-noc",
"qcom,sdm845-mem-noc",
"qcom,sdm845-mmss-noc",
"qcom,sdm845-system-noc",
- #interconnect-cells : should contain 1
- reg : shall contain base register location and length
- qcom,bcm-voters : shall contain phandles to bcm voters
Optional properties:
qcom,bcm-voter-names : List of bcm-voter name strings sorted in the same
order as the qcom,bcm-voters property. The names will
be used to differentiate the specific RSC being targeted.
Examples:
apps_rsc: rsc {
rsc_hlos: interconnect {
compatible = "qcom,sdm845-rsc-hlos";
#interconnect-cells = <1>;
};
mem_noc: interconnect@1380000 {
compatible = "qcom,sdm845-mem-noc";
reg = <0 0x01380000 0 0x27200>;
#interconnect-cells = <1>;
qcom,bcm-voter-names = "apps_rsc", "disp_rsc";
qcom,bcm-voters = <&apps_bcm_voter>, <&disp_bcm_voter>;
};
aggre1_noc: interconnect@16e0000 {
compatible = "qcom,sdm845-aggre1-noc";
reg = <0x016e0000 0xd080>;
interconnect-cells = <1>;
qcom,bcm-voters = <&apps_bcm_voter>;
};
mmss_noc: interconnect@1740000 {
compatible = "qcom,sdm845-mmss-noc";
reg = <0x01740000 0x1c1000>;
interconnect-cells = <1>;
qcom,bcm-voter-names = "apps_rsc", "disp_rsc";
qcom,bcm-voters = <&apps_bcm_voter>, <&disp_bcm_voter>;
};