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. Applies cleanly on rproc-next (c3c21b356505). Thanks, Mathieu [1]. https://lkml.org/lkml/2020/7/14/1600 ---- New for V3: - Added RB from Arnaud where applicable. - Reformatted comments about "detach" operation in struct rproc_ops. - Fixed error path in rproc_shutdown(). - Fixed processing of "start" command in state_store() and rproc_cdev_write(). - Changed binding from "autonomous-on-core-reboot" to "autonomous-on-core-shutdown". - Wrote a proper YAML file for the binding. Mathieu Poirier (15): dt-bindings: remoteproc: Add bindind to support autonomous processors remoteproc: Re-check state in rproc_shutdown() remoteproc: Remove useless check in rproc_del() 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: Rename function rproc_actuate() 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 | 25 +++ drivers/remoteproc/remoteproc_cdev.c | 27 ++- drivers/remoteproc/remoteproc_core.c | 182 +++++++++++++++--- drivers/remoteproc/remoteproc_sysfs.c | 20 +- include/linux/remoteproc.h | 18 +- 5 files changed, 225 insertions(+), 47 deletions(-) create mode 100644 Documentation/devicetree/bindings/remoteproc/remoteproc-core.yaml -- 2.25.1
