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Date: Fri, 19 Jul 2019 13:32:23 -0700
From: David Dai <daidavid1@...eaurora.org>
To: georgi.djakov@...aro.org, bjorn.andersson@...aro.org,
robh+dt@...nel.org
Cc: David Dai <daidavid1@...eaurora.org>, evgreen@...gle.com,
ilina@...eaurora.org, seansw@....qualcomm.com, elder@...aro.org,
linux-kernel@...r.kernel.org, devicetree@...r.kernel.org,
linux-arm-msm@...r.kernel.org, linux-pm@...r.kernel.org
Subject: [PATCH 1/2] dt-bindings: interconnect: Update Qualcomm SDM845 DT bindings
Redefine the Network-on-Chip devices to more accurately describe
the interconnect topology on Qualcomm's SDM845 platform. Each
interconnect device can communicate with different instances of the
RPMh hardware which are described as RSCs(Resource State Coordinators).
Signed-off-by: David Dai <daidavid1@...eaurora.org>
---
.../bindings/interconnect/qcom,bcm-voter.txt | 32 +++++++++++++++++
.../bindings/interconnect/qcom,sdm845.txt | 40 +++++++++++++++++-----
2 files changed, 63 insertions(+), 9 deletions(-)
create mode 100644 Documentation/devicetree/bindings/interconnect/qcom,bcm-voter.txt
diff --git a/Documentation/devicetree/bindings/interconnect/qcom,bcm-voter.txt b/Documentation/devicetree/bindings/interconnect/qcom,bcm-voter.txt
new file mode 100644
index 0000000..2cf7da2
--- /dev/null
+++ b/Documentation/devicetree/bindings/interconnect/qcom,bcm-voter.txt
@@ -0,0 +1,32 @@
+Qualcomm 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",
+
+Examples:
+
+apps_rsc: rsc@...c0000 {
+ label = "apps_rsc";
+ compatible = "qcom,rpmh-rsc";
+
+ apps_bcm_voter: bcm_voter {
+ compatible = "qcom,sdm845-bcm-voter";
+ };
+}
+
+disp_rsc: rsc@...d0000 {
+ label = "disp_rsc";
+ compatible = "qcom,rpmh-rsc";
+
+ disp_bcm_voter: bcm_voter {
+ compatible = "qcom,sdm845-bcm-voter";
+ };
+}
diff --git a/Documentation/devicetree/bindings/interconnect/qcom,sdm845.txt b/Documentation/devicetree/bindings/interconnect/qcom,sdm845.txt
index 5c4f1d9..27f9ed9 100644
--- a/Documentation/devicetree/bindings/interconnect/qcom,sdm845.txt
+++ b/Documentation/devicetree/bindings/interconnect/qcom,sdm845.txt
@@ -4,21 +4,43 @@ 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-voter : shall contain phandles to bcm voters
Examples:
-apps_rsc: rsc {
- rsc_hlos: interconnect {
- compatible = "qcom,sdm845-rsc-hlos";
- #interconnect-cells = <1>;
- };
+aggre1_noc: interconnect@...0000 {
+ compatible = "qcom,sdm845-aggre1_noc";
+ reg = <0x16e0000 0xd080>;
+ interconnect-cells = <1>;
+ qcom,bcm-voter = <&apps_bcm_voter>;
};
+mmss_noc: interconnect@...0000 {
+ compatible = "qcom,sdm845-mmss_noc";
+ reg = <0x1740000 0x1c1000>;
+ interconnect-cells = <1>;
+ qcom,bcm-voter = <&apps_bcm_voter>, <&disp_bcm_voter>;
+};
+
+mem_noc: interconnect@...0000 {
+ compatible = "qcom,sdm845-mem_noc";
+ reg = <0 0x1380000 0 0x27200>;
+ #interconnect-cells = <1>;
+ qcom,bcm-voter = <&apps_bcm_voter>, <&disp_bcm_voter>;
+};
--
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