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The System Control Management Interface(SCMI) >> firmware runs on the M33 core. The i.MX95 SCMI firmware named System >> Manager(SM) includes vendor extension protocols, Logical Machine >> Management(LMM) protocol and CPU protocol and etc. >> >> There are three cases for M7: >> (1) M7 in a separate Logical Machine(LM) that Linux couldn't control it. >> (2) M7 in a separate Logical Machine that Linux could control it using >> LMM protocol >> (3) M7 runs in same Logical Machine as A55, so Linux could control it >> using CPU protocol >> >> In patch 2, Use LMM and CPU protocol to manage M7. More info could be >> found in the patch commit log >> >> Current setup relies on pre-Linux software(U-Boot) to do >> M7 TCM ECC initialization. In future, we could add the support in Linux >> to decouple U-Boot and Linux. >> >> Patchset was tested with below boot images when the patchset based on next-20250526: >> imx-boot-variant-rpmsg-imx95-19x19-lpddr5-evk-sd.bin-flash_lpboot_sm_a55 (Use LMM protocol) >> imx-boot-variant-alt-imx95-19x19-lpddr5-evk-sd.bin-flash_alt (Use CPU protocol) >> imx-boot-imx95-19x19-lpddr5-evk-sd.bin-flash_a55 (M7 not under A55 control) >> imx-boot-imx95-19x19-lpddr5-evk-sd.bin-flash_all (M7 not under A55 control) >> >> Patchset was tested again with rebase on next-20250623 >> >> Patchset is re-based on next-20250603. >> >> Thanks for Daniel/Frank helping review the patchset before posting out to list. >> >> Signed-off-by: Peng Fan >> --- >> Changes in v3: >> - Drop fsl,lmm-id and fsl,cpu-id for binding in patch 1 >> - Add lmid and cpuid in driver patch 2. >> - Add i.MX95 lmid and cpuid in patch 3 >> - Rebased to linux-next-6-23 and tested with this new rebased version >> - Add dtsi/dts patch 4,5 to give people a view on how it is used per Krzysztof >> - Daniel's R-b are still kept after talk with Daniel >> - Link to v2: https://lore.kernel.org/r/20250606-imx95-rproc-1-v2-0-a2bd64438be9@nxp.com >> >> Changes in v2: >> - Typo fix in patch 2 commit message >> - Move the m7 address mapping array from patch 2 to patch 3 >> - Add R-b from Daniel to patch 3 >> - Link to v1: https://lore.kernel.org/r/20250604-imx95-rproc-1-v1-0-a6e5f512731c@nxp.com >> >> --- >> Peng Fan (5): >> dt-bindings: remoteproc: fsl,imx-rproc: Add support for i.MX95 >> remoteproc: imx_rproc: Add support for System Manager API >> remoteproc: imx_rproc: Add support for i.MX95 >> arm64: dts: imx95: Add SCMI LMM/CPU nodes >> arm64: dts: imx95-19x19-evk: Add CM7 nodes and vdev related memory regions >> >> .../bindings/remoteproc/fsl,imx-rproc.yaml | 1 + >> arch/arm64/boot/dts/freescale/imx95-19x19-evk.dts | 45 +++++++ >> arch/arm64/boot/dts/freescale/imx95.dtsi | 8 ++ >> drivers/remoteproc/imx_rproc.c | 138 ++++++++++++++++++++- >> drivers/remoteproc/imx_rproc.h | 5 + >> 5 files changed, 195 insertions(+), 2 deletions(-) >> --- >> base-commit: fda740558acb4303fcf377e5cf9139f795b1d85b >> change-id: 20250525-imx95-rproc-1-20bb74ddc8af >> >> Best regards, >> -- >> Peng Fan >> >> >> > > >My bot found new DTB warnings on the .dts files added or changed in this >series. > >Some warnings may be from an existing SoC .dtsi. Or perhaps the warnings >are fixed by another series. Ultimately, it is up to the platform >maintainer whether these warnings are acceptable or not. No need to reply >unless the platform maintainer has comments. > >If you already ran DT checks and didn't see these error(s), then >make sure dt-schema is up to date: > > pip3 install dtschema --upgrade > > >This patch series was applied (using b4) to base: > Base: base-commit fda740558acb4303fcf377e5cf9139f795b1d85b not known, ignoring > Base: attempting to guess base-commit... > Base: tags/next-20250625 (exact match) > >If this is not the correct base, please add 'base-commit' tag >(or use b4 which does this automatically) > >New warnings running 'make CHECK_DTBS=y for arch/arm64/boot/dts/freescale/' for 20250625-imx95-rproc-1-v3-0-699031f5926d@nxp.com: > >arch/arm64/boot/dts/freescale/imx95-tqma9596sa-mb-smarc-2.dtb: scmi (arm,scmi): Unevaluated properties are not allowed ('protocol@80', 'protocol@81', 'protocol@82', 'protocol@84' were unexpected) > from schema $id: http://devicetree.org/schemas/firmware/arm,scmi.yaml# This is because [1] is still not picked, not because of my patchset. [1]https://lore.kernel.org/imx/20250513-whimsical-almond-quoll-e3ad5b@sudeepholla/ Thanks, Peng > > > > >