remoteproc: Introducing function rproc_attach() (d848a481) · Commits · 戴 / test

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>

drivers/remoteproc/remoteproc_core.c

+42 −0

Original line number	Diff line number	Diff line
		@@ -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.
		*/

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