On Fri, 07 Jun 2024 11:33:24 +0200, Arnaud Pouliquen wrote: > The "st,stm32mp1-m4-tee" compatible is utilized in a system configuration > where the Cortex-M4 firmware is loaded by the Trusted Execution Environment > (TEE). > > For instance, this compatible is used in both the Linux and OP-TEE device > trees: > - In OP-TEE, a node is defined in the device tree with the > "st,stm32mp1-m4-tee" compatible to support signed remoteproc firmware. > Based on DT properties, the OP-TEE remoteproc framework is initiated to > expose a trusted application service to authenticate and load the remote > processor firmware provided by the Linux remoteproc framework, as well > as to start and stop the remote processor. > - In Linux, when the compatibility is set, the Cortex-M resets should not > be declared in the device tree. In such a configuration, the reset is > managed by the OP-TEE remoteproc driver and is no longer accessible from > the Linux kernel. > > Associated with this new compatible, add the "st,proc-id" property to > identify the remote processor. This ID is used to define a unique ID, > common between Linux, U-Boot, and OP-TEE, to identify a coprocessor. > This ID will be used in requests to the OP-TEE remoteproc Trusted > Application to specify the remote processor. > > Signed-off-by: Arnaud Pouliquen <arnaud.pouliquen@xxxxxxxxxxx> > --- > update vs previous version > - merge [PATCH v5 4/7] remoteproc: core introduce rproc_set_rsc_table_on_start function > as new "st,proc-id" is associated to "st,stm32mp1-m4-tee" compatible > - update commit message > - remove Reviewed-by: Rob Herring <robh@xxxxxxxxxx> as patch is updated > --- > .../bindings/remoteproc/st,stm32-rproc.yaml | 58 ++++++++++++++++--- > 1 file changed, 50 insertions(+), 8 deletions(-) > Reviewed-by: Rob Herring (Arm) <robh@xxxxxxxxxx>
