i.MX95 features a Cortex-M33 core, six Cortex-A55 cores, and
one Cortex-M7 core. 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 1, add fsl,lmm-id and fsl,cpu-id to indicate LM ID and CPU ID
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 is re-based on next-20250603.
Thanks for Daniel helping review the patchset before posting out to list.
Signed-off-by: Peng Fan <peng....@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-a6e5f5127...@nxp.com
---
Peng Fan (3):
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
.../bindings/remoteproc/fsl,imx-rproc.yaml | 27 ++++
drivers/remoteproc/imx_rproc.c | 146 ++++++++++++++++++++-
drivers/remoteproc/imx_rproc.h | 2 +
3 files changed, 173 insertions(+), 2 deletions(-)
---
base-commit: b79c044712e34fe49e7b85ffafd0bd460b5c4afa
change-id: 20250525-imx95-rproc-1-20bb74ddc8af
Best regards,
--
Peng Fan <peng....@nxp.com>
