Merge "rpmsg: glink: Add support for rpmsg glink chrdev" (1459bea6) · Commits · e / devices / android_kernel_oneplus_sm8150

Documentation/devicetree/bindings/soc/qcom/qcom,glink.txt

+5 −0

Original line number	Diff line number	Diff line
		@@ -10,6 +10,11 @@ edge.
		Value type: <stringlist>
		Definition: must be "qcom,glink-rpm"

		- label:
		Usage: optional
		Value type: <string>
		Definition: should specify the subsystem name this edge corresponds to.

		- interrupts:
		Usage: required
		Value type: <prop-encoded-array>

drivers/rpmsg/qcom_glink_native.c

+46 −0

Original line number	Diff line number	Diff line
		/*
		* Copyright (c) 2016-2017, Linaro Ltd
		* Copyright (c) 2018, The Linux Foundation. All rights reserved.
		*
		* This program is free software; you can redistribute it and/or modify
		* it under the terms of the GNU General Public License version 2 and
		@@ -101,6 +102,8 @@ struct glink_core_rx_intent {
		struct qcom_glink {
		struct device *dev;

		const char *name;

		struct mbox_client mbox_client;
		struct mbox_chan *mbox_chan;

		@@ -130,6 +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
		@@ -1337,6 +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,
		@@ -1545,6 +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,
		@@ -1575,6 +1613,10 @@ struct qcom_glink qcom_glink_native_probe(struct device dev,
		idr_init(&glink->lcids);
		idr_init(&glink->rcids);

		ret = of_property_read_string(dev->of_node, "label", &glink->name);
		if (ret < 0)
		glink->name = dev->of_node->name;

		glink->mbox_client.dev = dev;
		glink->mbox_chan = mbox_request_channel(&glink->mbox_client, 0);
		if (IS_ERR(glink->mbox_chan)) {
		@@ -1599,6 +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);