78 lines · c
1// SPDX-License-Identifier: GPL-2.0-only2/* 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");78