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| author | Mathieu Poirier <mathieu.poirier@linaro.org> | 2021-03-12 09:24:45 -0700 |
|---|---|---|
| committer | Bjorn Andersson <bjorn.andersson@linaro.org> | 2021-03-18 07:55:47 -0500 |
| commit | 6070203fe43335a02b7fd103bae582095411adc5 (patch) | |
| tree | 94f647a8113eef69fdbdf61f318f733ef5f98bdb /drivers/remoteproc | |
| parent | 7f3bd0c019cb813448d867c17c9b9dad205a13eb (diff) | |
| download | linux-6070203fe43335a02b7fd103bae582095411adc5.tar.gz linux-6070203fe43335a02b7fd103bae582095411adc5.tar.bz2 linux-6070203fe43335a02b7fd103bae582095411adc5.zip | |
remoteproc: Introduce function __rproc_detach()
Introduce function __rproc_detach() to perform the same kind of
operation as rproc_stop(), but instead of switching off the
remote processor using rproc->ops->stop(), it uses
rproc->ops->detach(). That way it is possible for the core
to release the resources associated with a remote processor while
the latter is kept operating.
Signed-off-by: Mathieu Poirier <mathieu.poirier@linaro.org>
Reviewed-by: Peng Fan <peng.fan@nxp.com>
Reviewed-by: Arnaud Pouliquen <arnaud.pouliquen@st.com>
Link: https://lore.kernel.org/r/20210312162453.1234145-10-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 | 30 |
1 files changed, 30 insertions, 0 deletions
diff --git a/drivers/remoteproc/remoteproc_core.c b/drivers/remoteproc/remoteproc_core.c index de670f4f592c..23e9040386c2 100644 --- a/drivers/remoteproc/remoteproc_core.c +++ b/drivers/remoteproc/remoteproc_core.c @@ -1712,6 +1712,36 @@ static int rproc_stop(struct rproc *rproc, bool crashed) return 0; } +/* + * __rproc_detach(): Does the opposite of __rproc_attach() + */ +static int __maybe_unused __rproc_detach(struct rproc *rproc) +{ + struct device *dev = &rproc->dev; + int ret; + + /* No need to continue if a detach() operation has not been provided */ + if (!rproc->ops->detach) + return -EINVAL; + + /* Stop any subdevices for the remote processor */ + rproc_stop_subdevices(rproc, false); + + /* Tell the remote processor the core isn't available anymore */ + ret = rproc->ops->detach(rproc); + if (ret) { + dev_err(dev, "can't detach from rproc: %d\n", ret); + return ret; + } + + rproc_unprepare_subdevices(rproc); + + rproc->state = RPROC_DETACHED; + + dev_info(dev, "detached remote processor %s\n", rproc->name); + + return 0; +} /** * rproc_trigger_recovery() - recover a remoteproc |