Unverified Commit d15befc0 authored by Stephan Gerhold's avatar Stephan Gerhold Committed by Mark Brown
Browse files

spi: dt-bindings: qup: Document interconnects 



When the SPI QUP controller is used together with a DMA engine it needs
to vote for the interconnect path to the DRAM. Otherwise it may be
unable to access the memory quickly enough.

Reviewed-by: default avatarKrzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
Signed-off-by: default avatarStephan Gerhold <stephan.gerhold@kernkonzept.com>
Link: https://lore.kernel.org/r/20230919-spi-qup-dvfs-v2-3-1bac2e9ab8db@kernkonzept.com


Signed-off-by: default avatarMark Brown <broonie@kernel.org>
parent 287fcdaa

Documentation/devicetree/bindings/spi/qcom,spi-qup.yaml

+5 −0
Original line number Diff line number Diff line
@@ -44,6 +44,9 @@ properties: 
      - const: tx

      - const: rx



  interconnects:

    maxItems: 1



  interrupts:

    maxItems: 1
@@ -67,6 +70,7 @@ unevaluatedProperties: false 
examples:

  - |

    #include <dt-bindings/clock/qcom,gcc-msm8996.h>

    #include <dt-bindings/interconnect/qcom,msm8996.h>

    #include <dt-bindings/interrupt-controller/arm-gic.h>

    #include <dt-bindings/power/qcom-rpmpd.h>
@@ -84,6 +88,7 @@ examples: 
        dma-names = "tx", "rx";

        power-domains = <&rpmpd MSM8996_VDDCX>;

        operating-points-v2 = <&spi_opp_table>;

        interconnects = <&pnoc MASTER_BLSP_1 &bimc SLAVE_EBI_CH0>;

        #address-cells = <1>;

        #size-cells = <0>;

    };