Bindings/interconnect/qcom,bcm-voter.yaml

   1 # SPDX-License-Identifier: (GPL-2.0 OR BSD-2-Clause)
   2 %YAML 1.2
   3 ---
   4 $id: http://devicetree.org/schemas/interconnect/qcom,bcm-voter.yaml#
   5 $schema: http://devicetree.org/meta-schemas/core.yaml#
   6
   7 title: Qualcomm BCM-Voter Interconnect
   8
   9 maintainers:
  10   - Georgi Djakov <georgi.djakov@linaro.org>
  11
  12 description: |
  13   The Bus Clock Manager (BCM) is a dedicated hardware accelerator that manages
  14   shared system resources by aggregating requests from multiple Resource State
  15   Coordinators (RSC). Interconnect providers are able to vote for aggregated
  16   thresholds values from consumers by communicating through their respective
  17   RSCs.
  18
  19 properties:
  20   compatible:
  21     enum:
  22       - qcom,bcm-voter
  23
  24   qcom,tcs-wait:
  25     description: |
  26       Optional mask of which TCSs (Triggered Command Sets) wait for completion
  27       upon triggering. If not specified, then the AMC and WAKE sets wait for
  28       completion. The mask bits are available in the QCOM_ICC_TAG_* defines.
  29
  30       The AMC TCS is triggered immediately when icc_set_bw() is called. The
  31       WAKE/SLEEP TCSs are triggered when the RSC transitions between active and
  32       sleep modes.
  33
  34       In most cases, it's necessary to wait in both the AMC and WAKE sets to
  35       ensure resources are available before use. If a specific RSC and its use
  36       cases can ensure sufficient delay by other means, then this can be
  37       overridden to reduce latencies.
  38
  39     $ref: /schemas/types.yaml#/definitions/uint32
  40
  41 required:
  42   - compatible
  43
  44 additionalProperties: false
  45
  46 examples:
  47   # Example 1: apps bcm_voter on SDM845 SoC should be defined inside &apps_rsc node
  48   # as defined in Documentation/devicetree/bindings/soc/qcom/qcom,rpmh-rsc.yaml
  49   - |
  50
  51     apps_bcm_voter: bcm-voter {
  52         compatible = "qcom,bcm-voter";
  53     };
  54
  55   # Example 2: disp bcm_voter on SDM845 should be defined inside &disp_rsc node
  56   # as defined in Documentation/devicetree/bindings/soc/qcom/qcom,rpmh-rsc.yaml
  57   - |
  58
  59     #include <dt-bindings/interconnect/qcom,icc.h>
  60
  61     disp_bcm_voter: bcm-voter {
  62         compatible = "qcom,bcm-voter";
  63         qcom,tcs-wait = <QCOM_ICC_TAG_AMC>;
  64     };
  65 ...