The Qualcomm SM8550 SoC Modem Processing SubSystem requires that a memory region named DSM should be shared with the Application Processor SubSystem. This adds bindings for this MPSS DSM memory and driver implementation to share this memory region with the Modem Processing SubSystem. The MPSS DSM memory must be shared between the APPS SubSystem and the MPSS SubSystems, for the whole lifetime of the system. To: Andy Gross <agross@xxxxxxxxxx> To: Bjorn Andersson <andersson@xxxxxxxxxx> To: Konrad Dybcio <konrad.dybcio@xxxxxxxxxxxxxx> To: Rob Herring <robh+dt@xxxxxxxxxx> To: Krzysztof Kozlowski <krzysztof.kozlowski+dt@xxxxxxxxxx> To: Frank Rowand <frowand.list@xxxxxxxxx> Cc: linux-arm-msm@xxxxxxxxxxxxxxx Cc: devicetree@xxxxxxxxxxxxxxx Cc: linux-kernel@xxxxxxxxxxxxxxx Signed-off-by: Neil Armstrong <neil.armstrong@xxxxxxxxxx> --- Changes in v2: - Fixed the bindings - Added some precision on the MPSS DSM in commit messages - Link to v1: https://lore.kernel.org/r/20221114-narmstrong-sm8550-upstream-mpss_dsm-v1-0-158dc2bb6e96@xxxxxxxxxx --- Neil Armstrong (2): dt-bindings: reserved-memory: document Qualcomm MPSS DSM memory soc: qcom: add MDSS DSM memory driver .../reserved-memory/qcom,mpss-dsm-mem.yaml | 37 +++++++++ drivers/of/platform.c | 1 + drivers/soc/qcom/Kconfig | 10 +++ drivers/soc/qcom/Makefile | 1 + drivers/soc/qcom/mpss_dsm_mem.c | 95 ++++++++++++++++++++++ 5 files changed, 144 insertions(+) --- base-commit: 999e0145579c0e04174044a39257a4d96ee30020 change-id: 20221114-narmstrong-sm8550-upstream-mpss_dsm-21c438c65f9b Best regards, -- Neil Armstrong <neil.armstrong@xxxxxxxxxx>
