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. Of special interest in this series are patches 5 and 6 where getting the address of the resource table installed by an eternal entity if moved to the core. This is to support scenarios where a remote process has been booted by the core but is being detached. To re-attach the remote processor, the address of the resource table needs to be known at a later time than the platform driver's probe() function. Applies cleanly on v5.10 Thanks, Mathieu [1]. https://lkml.org/lkml/2020/7/14/1600 ---- New for v4: - Made binding description OS agnostic (Rob) - Added functionality to set the external resource table in the core - Fixed a crash when detaching (Arnaud) - Fixed error code propagation in rproc_cdev_relase() and rproc_del() (Arnaud) - Added RB tags Mathieu Poirier (17): 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 get_loaded_rsc_table() remoteproc operation remoteproc: stm32: Move resource table setup to rproc_ops remoteproc: Add new RPROC_ATTACHED state remoteproc: Properly represent the attached state remoteproc: Properly deal with a kernel panic when attached remoteproc: Add new detach() remoteproc operation remoteproc: Introduce function __rproc_detach() remoteproc: Introduce function rproc_detach() remoteproc: Add return value to function rproc_shutdown() 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 | 211 +++++++++++++++--- drivers/remoteproc/remoteproc_internal.h | 8 + drivers/remoteproc/remoteproc_sysfs.c | 20 +- drivers/remoteproc/stm32_rproc.c | 147 ++++++------ include/linux/remoteproc.h | 24 +- 7 files changed, 344 insertions(+), 125 deletions(-) create mode 100644 Documentation/devicetree/bindings/remoteproc/remoteproc-core.yaml -- 2.25.1
