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Commit 597151c8 authored by Chris Lew's avatar Chris Lew Committed by Gerrit - the friendly Code Review server
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rpmsg: glink: Add support for rpmsg glink chrdev 



RPMSG provides a char device interface to userspace. Probe the rpmsg
chrdev channel to enable the rpmsg_ctrl device creation on glink
transports.

Change-Id: Ia08c658e36e1aefd9d17a60a372557fae52c1fe1
Signed-off-by: default avatarChris Lew <clew@codeaurora.org>
parent 0f916baa

drivers/rpmsg/qcom_glink_native.c

+39 −0
Original line number Diff line number Diff line
@@ -133,6 +133,13 @@ enum { 
	GLINK_STATE_CLOSING,

};



struct qcom_glink_device {

	struct rpmsg_device rpdev;

	struct qcom_glink *glink;

};



#define to_glink_device(_x) container_of(_x, struct qcom_glink_device, rpdev)



/**

 * struct glink_channel - internal representation of a channel

 * @rpdev:	rpdev reference, only used for primary endpoints
@@ -1340,6 +1347,10 @@ static struct device_node *qcom_glink_match_channel(struct device_node *node, 
	return NULL;

}



static const struct rpmsg_device_ops glink_chrdev_ops = {

	.create_ept = qcom_glink_create_ept,

};



static const struct rpmsg_device_ops glink_device_ops = {

	.create_ept = qcom_glink_create_ept,

	.announce_create = qcom_glink_announce_create,
@@ -1548,6 +1559,30 @@ static void qcom_glink_work(struct work_struct *work) 
	}

}



static void qcom_glink_device_release(struct device *dev)

{

	struct rpmsg_device *rpdev = to_rpmsg_device(dev);

	struct qcom_glink_device *gdev = to_glink_device(rpdev);



	kfree(gdev);

}



static int qcom_glink_create_chrdev(struct qcom_glink *glink)

{

	struct qcom_glink_device *gdev;



	gdev = kzalloc(sizeof(*gdev), GFP_KERNEL);

	if (!gdev)

		return -ENOMEM;



	gdev->glink = glink;

	gdev->rpdev.ops = &glink_chrdev_ops;

	gdev->rpdev.dev.parent = glink->dev;

	gdev->rpdev.dev.release = qcom_glink_device_release;



	return rpmsg_chrdev_register_device(&gdev->rpdev);

}



struct qcom_glink *qcom_glink_native_probe(struct device *dev,

					   unsigned long features,

					   struct qcom_glink_pipe *rx,
@@ -1606,6 +1641,10 @@ struct qcom_glink *qcom_glink_native_probe(struct device *dev, 
	if (ret)

		return ERR_PTR(ret);



	ret = qcom_glink_create_chrdev(glink);

	if (ret)

		dev_err(glink->dev, "failed to register chrdev\n");



	return glink;

}

EXPORT_SYMBOL_GPL(qcom_glink_native_probe);