Following the work done here [1], this set provides support for the remoteproc core to release resources associated with a remote processor without having to switch it off. That way a platform driver can be removed or the application processor power cycled while the remote processor is still operating. Modifications for this revision are detailed in the changelog of each patch but the main enhancement is the setup of a clean resource table when a remote processor is detached from. I have tested scenarios where the processor is detached and re-attached when booted from an external entity and the remoteproc core. I was also able to confirm that removing the platform driver of a detached remote processor works. Re-attaching the remote processor after re-inserting the platorm driver also works properly. Applies cleanly on rproc-next (43d3f2c715ce). Thanks, Mathieu Arnaud POULIQUEN (1): remoteproc: stm32: Move memory parsing to rproc_ops Mathieu Poirier (18): dt-bindings: remoteproc: Add bindind to support autonomous processors remoteproc: Re-check state in rproc_shutdown() remoteproc: Remove useless check in rproc_del() remoteproc: Rename function rproc_actuate() remoteproc: Add new RPROC_ATTACHED state remoteproc: Properly represent the attached state remoteproc: Add new get_loaded_rsc_table() to rproc_ops remoteproc: stm32: Move resource table setup to rproc_ops remoteproc: Add new detach() remoteproc operation remoteproc: Introduce function __rproc_detach() remoteproc: Introduce function rproc_detach() remoteproc: Properly deal with the resource table remoteproc: Add return value to function rproc_shutdown() remoteproc: Properly deal with a kernel panic when attached remoteproc: Properly deal with a stop request when attached remoteproc: Properly deal with a start request when attached remoteproc: Properly deal with detach request remoteproc: Refactor rproc delete and cdev release path .../bindings/remoteproc/remoteproc-core.yaml | 27 ++ drivers/remoteproc/remoteproc_cdev.c | 32 +- drivers/remoteproc/remoteproc_core.c | 307 ++++++++++++++++-- drivers/remoteproc/remoteproc_elf_loader.c | 24 +- drivers/remoteproc/remoteproc_internal.h | 10 + drivers/remoteproc/remoteproc_sysfs.c | 20 +- drivers/remoteproc/stm32_rproc.c | 168 +++++----- include/linux/remoteproc.h | 27 +- 8 files changed, 465 insertions(+), 150 deletions(-) create mode 100644 Documentation/devicetree/bindings/remoteproc/remoteproc-core.yaml -- 2.25.1
