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Commit e993d2fe authored by David Dai's avatar David Dai
Browse files

dt-bindings: interconnect: Update QTI SDM845 DT bindings 

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
parent d9bae78a

bindings/interconnect/qcom,bcm-voter.txt

0 → 100644
+31 −0
Original line number Diff line number Diff line 
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";

	};

}

bindings/interconnect/qcom,sdm845.txt

+37 −9
Original line number Diff line number Diff line
@@ -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";

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>;

};