The Qualcomm RPM message RAM is a part of the RPM low-power processor's actual RAM that's exposed to the Application Processors as a MMIO-mapped region. It contains a couple of things, most notably the RPM master stats, detailing per-master (read: per-subsystem) sleep/wake statistics and an interrupt controller that's crucial to achieving full SoC clock and/or power collapse states (the MPM). This series tries to prepare the MSG RAM node to be a host for such devices. Depends on https://lore.kernel.org/linux-arm-msm/20230308011705.291337-1-konrad.dybcio@xxxxxxxxxx/ to solve a warning in the example. The DTS commits don't add -cells or -ranges, as without children they're not of very much use. They'll be introduced along with subnodes. Signed-off-by: Konrad Dybcio <konrad.dybcio@xxxxxxxxxx> --- Konrad Dybcio (15): dt-bindings: mfd: Split out Qcom RPM MSG RAM arm64: dts: qcom: msm8916: Add simple-mfd to rpm_msg_ram arm64: dts: qcom: msm8953: Add simple-mfd to rpm_msg_ram arm64: dts: qcom: msm8976: Add simple-mfd to rpm_msg_ram arm64: dts: qcom: msm8994: Add simple-mfd to rpm_msg_ram arm64: dts: qcom: msm8996: Add simple-mfd to rpm_msg_ram arm64: dts: qcom: msm8998: Add simple-mfd to rpm_msg_ram arm64: dts: qcom: qcs404: Add simple-mfd to rpm_msg_ram arm64: dts: qcom: sdm630: Add simple-mfd to rpm_msg_ram arm64: dts: qcom: sm6115: Add simple-mfd to rpm_msg_ram arm64: dts: qcom: sm6125: Add simple-mfd to rpm_msg_ram arm64: dts: qcom: sm6375: Add simple-mfd to rpm_msg_ram ARM: dts: qcom-apq8084: Add simple-mfd to rpm_msg_ram ARM: dts: qcom-msm8226: Add simple-mfd to rpm_msg_ram ARM: dts: qcom-msm8974: Add simple-mfd to rpm_msg_ram .../devicetree/bindings/mfd/qcom,rpm-msg-ram.yaml | 82 ++++++++++++++++++++++ Documentation/devicetree/bindings/sram/sram.yaml | 2 - arch/arm/boot/dts/qcom-apq8084.dtsi | 2 +- arch/arm/boot/dts/qcom-msm8226.dtsi | 2 +- arch/arm/boot/dts/qcom-msm8974.dtsi | 2 +- arch/arm64/boot/dts/qcom/msm8916.dtsi | 2 +- arch/arm64/boot/dts/qcom/msm8953.dtsi | 2 +- arch/arm64/boot/dts/qcom/msm8976.dtsi | 2 +- arch/arm64/boot/dts/qcom/msm8994.dtsi | 2 +- arch/arm64/boot/dts/qcom/msm8996.dtsi | 2 +- arch/arm64/boot/dts/qcom/msm8998.dtsi | 2 +- arch/arm64/boot/dts/qcom/qcs404.dtsi | 2 +- arch/arm64/boot/dts/qcom/sdm630.dtsi | 2 +- arch/arm64/boot/dts/qcom/sm6115.dtsi | 2 +- arch/arm64/boot/dts/qcom/sm6125.dtsi | 2 +- arch/arm64/boot/dts/qcom/sm6375.dtsi | 2 +- 16 files changed, 96 insertions(+), 16 deletions(-) --- base-commit: 24469a0e5052ba01a35a15f104717a82b7a4798b change-id: 20230311-topic-msg_ram-6b83ca812cec Best regards, -- Konrad Dybcio <konrad.dybcio@xxxxxxxxxx>
