Support i.MX95 remoteproc. i.MX95 use SCMI Vendor protocol to manage
remote cores.
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
And because needs to do ECC initialization, patch 1 introduces a new
flag ATT_ECC to indicate whether the area needs to be cleared for ECC
initialization
In patch 2:
The current setup only targets for (2) and (3) to let U-Boot start
CM7. Need to extend the driver to using LMM and CPU protocol to manage the M7
core.
- Compare linux LM ID(got using scmi_imx_lmm_info) and M7 LM ID(the ID
is fixed as 1 in SM firmware if M7 is in a separate LM),
if Linux LM ID is not same as M7 LM ID(linux and M7 in same LM), use
LMM protocol to start/stop. Whether using CPU or LMM protocol to start/stop,
the M7 status detection could use CPU protocol to detect started or not. So
in imx_rproc_is_running, use scmi_imx_cpu_started to check the
status of M7.
- For above case (2), Use scmi_imx_lmm_power_boot to detect whether
the M7 LM is under control of A55 LM.
- For above case , after using SCMI_IMX_LMM_POWER_ON to check
permission, scmi_imx_lmm_shutdown API should be called to shutdown
the M7 LM.
patch 3 and 4 is for enabling remoteproc for i.MX95 EVK. The compatible
string is in linux-next tree, after it was added to linux upstream
imx95.dtsi, we could remove the changes in patch 3 in future.
CI build pass.
Signed-off-by: Peng Fan <[email protected]>
---
Peng Fan (4):
remoteproc: imx: Support ECC initialization
remoteproc: imx: Add i.MX95 support
arm: dts: imx95: Add cm7 node
imx9: Kconfig: Enable remoteproc for i.MX95 EVK
arch/arm/dts/imx95-u-boot.dtsi | 4 +
arch/arm/mach-imx/imx9/Kconfig | 12 +++
drivers/remoteproc/imx_rproc.c | 189 +++++++++++++++++++++++++++++++++++++++--
drivers/remoteproc/imx_rproc.h | 3 +
4 files changed, 203 insertions(+), 5 deletions(-)
---
base-commit: 6a1bdb7e952d5841f42742fefa907cae5dc8d50a
change-id: 20260129-imx95-rproc-b1b65c8b54cb
Best regards,
--
Peng Fan <[email protected]>
