linux-kernel - [PATCH v2 2/6] dt-bindings: interconnect: Add property to set BCM TCS wait behavior

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Message-Id: <20200710015652.19206-3-mdtipton@codeaurora.org>
Date:   Thu,  9 Jul 2020 18:56:48 -0700
From:   Mike Tipton <mdtipton@...eaurora.org>
To:     georgi.djakov@...aro.org
Cc:     bjorn.andersson@...aro.org, agross@...nel.org,
        linux-pm@...r.kernel.org, linux-arm-msm@...r.kernel.org,
        devicetree@...r.kernel.org, linux-kernel@...r.kernel.org,
        Mike Tipton <mdtipton@...eaurora.org>
Subject: [PATCH v2 2/6] dt-bindings: interconnect: Add property to set BCM TCS wait behavior

Add "qcom,tcs-wait" property to set which TCS should wait for completion
when triggering.

Signed-off-by: Mike Tipton <mdtipton@...eaurora.org>
---
 .../bindings/interconnect/qcom,bcm-voter.yaml       | 13 +++++++++++++
 1 file changed, 13 insertions(+)

diff --git a/Documentation/devicetree/bindings/interconnect/qcom,bcm-voter.yaml b/Documentation/devicetree/bindings/interconnect/qcom,bcm-voter.yaml
index 5971fc1df08d..f0c3d6b01831 100644
--- a/Documentation/devicetree/bindings/interconnect/qcom,bcm-voter.yaml
+++ b/Documentation/devicetree/bindings/interconnect/qcom,bcm-voter.yaml
@@ -21,6 +21,16 @@ properties:
     enum:
       - qcom,bcm-voter
 
+  qcom,tcs-wait:
+    description: |
+      Optional mask of which TCSs (Triggered Command Sets) wait for completion
+      upon triggering. In most cases, it's necessary to wait in both the AMC
+      and WAKE sets to ensure resources are available before use. If a specific
+      RSC and its use cases can ensure sufficient delay by other means, then
+      this can be overridden to reduce latencies.
+    $ref: /schemas/types.yaml#/definitions/uint32
+    default: QCOM_ICC_TAG_ACTIVE_ONLY
+
 required:
   - compatible
 
@@ -39,7 +49,10 @@ examples:
   # as defined in Documentation/devicetree/bindings/soc/qcom/rpmh-rsc.txt
   - |
 
+    #include <dt-bindings/interconnect/qcom,icc.h>
+
     disp_bcm_voter: bcm_voter {
         compatible = "qcom,bcm-voter";
+        qcom,tcs-wait = <QCOM_ICC_TAG_AMC>;
     };
 ...
-- 
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