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authorMathieu Poirier <mathieu.poirier@linaro.org>2020-07-14 13:50:29 -0600
committerBjorn Andersson <bjorn.andersson@linaro.org>2020-07-16 23:06:08 -0700
commitd848a4819d858973952de181314de6d05512fb98 (patch)
treed1367faceeeea603453591105dd2463e91a73c53 /drivers/remoteproc
parenta6a4f2857524007848f7957af432cddb4d43b593 (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.c42
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.
*/