Commit 7c89717f authored by Bjorn Andersson's avatar Bjorn Andersson
Browse files

remoteproc: Introduce rproc handle accessor for children 



In certain circumstances rpmsg devices needs to acquire a handle to the
ancestor remoteproc instance, e.g. to invoke rproc_report_crash() when a
fatal error is detected. Introduce an interface that walks the device
tree in search for a remoteproc instance and return this.

Tested-by: default avatarSuman Anna <s-anna@ti.com>
Signed-off-by: default avatarBjorn Andersson <bjorn.andersson@linaro.org>
parent 4fec0a5a

drivers/remoteproc/remoteproc_core.c

+18 −0
Original line number Diff line number Diff line
@@ -1431,6 +1431,7 @@ struct rproc *rproc_alloc(struct device *dev, const char *name, 
	rproc->dev.parent = dev;

	rproc->dev.type = &rproc_type;

	rproc->dev.class = &rproc_class;

	rproc->dev.driver_data = rproc;



	/* Assign a unique device index and name */

	rproc->index = ida_simple_get(&rproc_dev_index, 0, 0, GFP_KERNEL);
@@ -1569,6 +1570,23 @@ void rproc_remove_subdev(struct rproc *rproc, struct rproc_subdev *subdev) 
}

EXPORT_SYMBOL(rproc_remove_subdev);



/**

 * rproc_get_by_child() - acquire rproc handle of @dev's ancestor

 * @dev:	child device to find ancestor of

 *

 * Returns the ancestor rproc instance, or NULL if not found.

 */

struct rproc *rproc_get_by_child(struct device *dev)

{

	for (dev = dev->parent; dev; dev = dev->parent) {

		if (dev->type == &rproc_type)

			return dev->driver_data;

	}



	return NULL;

}

EXPORT_SYMBOL(rproc_get_by_child);



/**

 * rproc_report_crash() - rproc crash reporter function

 * @rproc: remote processor

include/linux/remoteproc.h

+2 −0
Original line number Diff line number Diff line
@@ -510,6 +510,8 @@ struct rproc_vdev { 
};



struct rproc *rproc_get_by_phandle(phandle phandle);

struct rproc *rproc_get_by_child(struct device *dev);



struct rproc *rproc_alloc(struct device *dev, const char *name,

			  const struct rproc_ops *ops,

			  const char *firmware, int len);

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