1// SPDX-License-Identifier: GPL-2.0-only
 2/* Copyright (c) 2021-2023, Stephan Gerhold <stephan@gerhold.net> */
 3
 4#include <linux/module.h>
 5#include <linux/of.h>
 6#include <linux/of_platform.h>
 7#include <linux/platform_device.h>
 8#include <linux/rpmsg/qcom_smd.h>
 9
10static int rpm_proc_probe(struct platform_device *pdev)
11{
12	struct qcom_smd_edge *edge = NULL;
13	struct device *dev = &pdev->dev;
14	struct device_node *edge_node;
15	int ret;
16
17	edge_node = of_get_child_by_name(dev->of_node, "smd-edge");
18	if (edge_node) {
19		edge = qcom_smd_register_edge(dev, edge_node);
20		of_node_put(edge_node);
21		if (IS_ERR(edge))
22			return dev_err_probe(dev, PTR_ERR(edge),
23					     "Failed to register smd-edge\n");
24	}
25
26	ret = devm_of_platform_populate(dev);
27	if (ret) {
28		dev_err(dev, "Failed to populate child devices: %d\n", ret);
29		goto err;
30	}
31
32	platform_set_drvdata(pdev, edge);
33	return 0;
34err:
35	if (edge)
36		qcom_smd_unregister_edge(edge);
37	return ret;
38}
39
40static void rpm_proc_remove(struct platform_device *pdev)
41{
42	struct qcom_smd_edge *edge = platform_get_drvdata(pdev);
43
44	if (edge)
45		qcom_smd_unregister_edge(edge);
46}
47
48static const struct of_device_id rpm_proc_of_match[] = {
49	{ .compatible = "qcom,rpm-proc", },
50	{ /* sentinel */ }
51};
52MODULE_DEVICE_TABLE(of, rpm_proc_of_match);
53
54static struct platform_driver rpm_proc_driver = {
55	.probe = rpm_proc_probe,
56	.remove_new = rpm_proc_remove,
57	.driver = {
58		.name = "qcom-rpm-proc",
59		.of_match_table = rpm_proc_of_match,
60	},
61};
62
63static int __init rpm_proc_init(void)
64{
65	return platform_driver_register(&rpm_proc_driver);
66}
67arch_initcall(rpm_proc_init);
68
69static void __exit rpm_proc_exit(void)
70{
71	platform_driver_unregister(&rpm_proc_driver);
72}
73module_exit(rpm_proc_exit);
74
75MODULE_DESCRIPTION("Qualcomm RPM processor/subsystem driver");
76MODULE_AUTHOR("Stephan Gerhold <stephan@gerhold.net>");
77MODULE_LICENSE("GPL");