From ad4bedfc060c2ef7f9e701bd3292f8de19bc1ea0 Mon Sep 17 00:00:00 2001 From: Mike Tipton Date: Thu, 3 Sep 2020 12:21:46 -0700 Subject: [PATCH] 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 Reviewed-by: Rob Herring Link: https://lore.kernel.org/r/20200903192149.30385-4-mdtipton@codeaurora.org Signed-off-by: Georgi Djakov --- .../bindings/interconnect/qcom,bcm-voter.yaml | 20 ++++++++++++++++++++ 1 file changed, 20 insertions(+) diff --git a/Documentation/devicetree/bindings/interconnect/qcom,bcm-voter.yaml b/Documentation/devicetree/bindings/interconnect/qcom,bcm-voter.yaml index 5971fc1..e23df48 100644 --- a/Documentation/devicetree/bindings/interconnect/qcom,bcm-voter.yaml +++ b/Documentation/devicetree/bindings/interconnect/qcom,bcm-voter.yaml @@ -21,6 +21,23 @@ properties: enum: - qcom,bcm-voter + qcom,tcs-wait: + description: | + Optional mask of which TCSs (Triggered Command Sets) wait for completion + upon triggering. If not specified, then the AMC and WAKE sets wait for + completion. The mask bits are available in the QCOM_ICC_TAG_* defines. + + The AMC TCS is triggered immediately when icc_set_bw() is called. The + WAKE/SLEEP TCSs are triggered when the RSC transitions between active and + sleep modes. + + 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 + required: - compatible @@ -39,7 +56,10 @@ examples: # as defined in Documentation/devicetree/bindings/soc/qcom/rpmh-rsc.txt - | + #include + disp_bcm_voter: bcm_voter { compatible = "qcom,bcm-voter"; + qcom,tcs-wait = ; }; ... -- 2.7.4