diff options
| author | Mathieu Poirier <mathieu.poirier@linaro.org> | 2020-07-14 13:50:29 -0600 |
|---|---|---|
| committer | Bjorn Andersson <bjorn.andersson@linaro.org> | 2020-07-16 23:06:08 -0700 |
| commit | d848a4819d858973952de181314de6d05512fb98 (patch) | |
| tree | d1367faceeeea603453591105dd2463e91a73c53 /drivers/remoteproc | |
| parent | a6a4f2857524007848f7957af432cddb4d43b593 (diff) | |
remoteproc: Introducing function rproc_attach()
Introducing function rproc_attach() to enact the same actions as
rproc_start(), but without the steps related to the handling of
a firmware image. That way we can properly deal with scenarios
where the remoteproc core needs to attach with a remote processsor
that has been booted by another entity.
Signed-off-by: Mathieu Poirier <mathieu.poirier@linaro.org>
Reviewed-by: Bjorn Andersson <bjorn.andersson@linaro.org>
Tested-by: Arnaud Pouliquen <arnaud.pouliquen@st.com>
Link: https://lore.kernel.org/r/20200714195035.1426873-4-mathieu.poirier@linaro.org
Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org>
Diffstat (limited to 'drivers/remoteproc')
| -rw-r--r-- | drivers/remoteproc/remoteproc_core.c | 42 |
1 files changed, 42 insertions, 0 deletions
diff --git a/drivers/remoteproc/remoteproc_core.c b/drivers/remoteproc/remoteproc_core.c index e00dff425c96..90842c535dc5 100644 --- a/drivers/remoteproc/remoteproc_core.c +++ b/drivers/remoteproc/remoteproc_core.c @@ -1372,6 +1372,48 @@ reset_table_ptr: return ret; } +static int __maybe_unused rproc_attach(struct rproc *rproc) +{ + struct device *dev = &rproc->dev; + int ret; + + ret = rproc_prepare_subdevices(rproc); + if (ret) { + dev_err(dev, "failed to prepare subdevices for %s: %d\n", + rproc->name, ret); + goto out; + } + + /* Attach to the remote processor */ + ret = rproc_attach_device(rproc); + if (ret) { + dev_err(dev, "can't attach to rproc %s: %d\n", + rproc->name, ret); + goto unprepare_subdevices; + } + + /* Start any subdevices for the remote processor */ + ret = rproc_start_subdevices(rproc); + if (ret) { + dev_err(dev, "failed to probe subdevices for %s: %d\n", + rproc->name, ret); + goto stop_rproc; + } + + rproc->state = RPROC_RUNNING; + + dev_info(dev, "remote processor %s is now attached\n", rproc->name); + + return 0; + +stop_rproc: + rproc->ops->stop(rproc); +unprepare_subdevices: + rproc_unprepare_subdevices(rproc); +out: + return ret; +} + /* * take a firmware and boot a remote processor with it. */ |