Commit f5a598ab authored by Konrad Dybcio's avatar Konrad Dybcio Committed by Jakub Kicinski
Browse files

dt-bindings: net: qcom,ipa: Add sram property for describing IMEM slice 



The IPA driver currently grabs a slice of IMEM through hardcoded
addresses. Not only is that ugly and against the principles of DT,
but it also creates a situation where two distinct platforms
implementing the same version of IPA would need to be hardcoded
together and matched at runtime.

Instead, do the sane thing and accept a handle to said region directly.

Don't make it required on purpose, as it's not there on ancient
implementations (currently unsupported) and we're not yet done with
filling the data across al DTs.

Reviewed-by: default avatarAlex Elder <elder@riscstar.com>
Reviewed-by: default avatarKrzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
Signed-off-by: default avatarKonrad Dybcio <konrad.dybcio@oss.qualcomm.com>
Link: https://patch.msgid.link/20260302-topic-ipa_imem-v6-2-c0ebbf3eae9f@oss.qualcomm.com


Signed-off-by: default avatarJakub Kicinski <kuba@kernel.org>
parent ca4c7771

Documentation/devicetree/bindings/net/qcom,ipa.yaml

+7 −0
Original line number Diff line number Diff line
@@ -165,6 +165,13 @@ properties: 
      initializing IPA hardware.  Optional, and only used when

      Trust Zone performs early initialization.



  sram:

    maxItems: 1

    description:

      A reference to an additional region residing in IMEM (special

      on-chip SRAM), which is accessed by the IPA firmware and needs

      to be IOMMU-mapped from the OS.



required:

  - compatible

  - iommus