[PATCH 00/13] remoteproc: Add support for detaching from rproc

Mathieu Poirier
2020-08-26T16:45:49Z

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 applcation processor power cycled while the remote processor is
still operating.

I have not tested the solution because of the work involved in getting
a new firmware image to support the feature. I will do so once it is
determined that this is the right approach to follow.

Applies cleanly on rproc-next (62b8f9e99329)

Thanks,
Mathieu

[1]. https://lkml.org/lkml/2020/7/14/1600

Mathieu Poirier (13):
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: 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 detach request
remoteproc: Refactor rproc delete and cdev release path
remoteproc: Properly deal with a kernel panic when attached

drivers/remoteproc/remoteproc_cdev.c | 18 ++-
drivers/remoteproc/remoteproc_core.c | 151 +++++++++++++++++++++-----
drivers/remoteproc/remoteproc_sysfs.c | 17 ++-
include/linux/remoteproc.h | 14 ++-
4 files changed, 157 insertions(+), 43 deletions(-)

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2.25.1