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[v3,00/15] remoteproc: Add support for detaching from rproc

Message ID 20201126210642.897302-1-mathieu.poirier@linaro.org (mailing list archive)
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Series remoteproc: Add support for detaching from rproc | expand

Message

Mathieu Poirier Nov. 26, 2020, 9:06 p.m. UTC 
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