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91148dbad8
Platform drivers now have the option to have the platform core create and remove any needed sysfs attribute files. So take advantage of that and do not register "by hand" any sysfs files. Cc: Valentina Manea <valentina.manea.m@gmail.com> Acked-by: Shuah Khan <skhan@linuxfoundation.org> Link: https://lore.kernel.org/r/20190805193636.25560-5-gregkh@linuxfoundation.org Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
110 lines
2.5 KiB
C
110 lines
2.5 KiB
C
// SPDX-License-Identifier: GPL-2.0+
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/*
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* Copyright (C) 2015 Karol Kosik <karo9@interia.eu>
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* Copyright (C) 2015-2016 Samsung Electronics
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* Igor Kotrasinski <i.kotrasinsk@samsung.com>
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* Krzysztof Opasiak <k.opasiak@samsung.com>
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*/
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#include <linux/device.h>
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#include <linux/list.h>
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#include <linux/module.h>
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#include "vudc.h"
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static unsigned int vudc_number = 1;
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module_param_named(num, vudc_number, uint, S_IRUGO);
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MODULE_PARM_DESC(num, "number of emulated controllers");
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static struct platform_driver vudc_driver = {
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.probe = vudc_probe,
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.remove = vudc_remove,
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.driver = {
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.name = GADGET_NAME,
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.dev_groups = vudc_groups,
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},
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};
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static struct list_head vudc_devices = LIST_HEAD_INIT(vudc_devices);
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static int __init init(void)
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{
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int retval = -ENOMEM;
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int i;
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struct vudc_device *udc_dev = NULL, *udc_dev2 = NULL;
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if (usb_disabled())
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return -ENODEV;
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if (vudc_number < 1) {
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pr_err("Number of emulated UDC must be no less than 1");
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return -EINVAL;
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}
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retval = platform_driver_register(&vudc_driver);
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if (retval < 0)
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goto out;
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for (i = 0; i < vudc_number; i++) {
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udc_dev = alloc_vudc_device(i);
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if (!udc_dev) {
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retval = -ENOMEM;
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goto cleanup;
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}
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retval = platform_device_add(udc_dev->pdev);
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if (retval < 0) {
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put_vudc_device(udc_dev);
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goto cleanup;
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}
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list_add_tail(&udc_dev->dev_entry, &vudc_devices);
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if (!platform_get_drvdata(udc_dev->pdev)) {
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/*
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* The udc was added successfully but its probe
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* function failed for some reason.
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*/
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retval = -EINVAL;
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goto cleanup;
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}
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}
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goto out;
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cleanup:
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list_for_each_entry_safe(udc_dev, udc_dev2, &vudc_devices, dev_entry) {
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list_del(&udc_dev->dev_entry);
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/*
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* Just do platform_device_del() here, put_vudc_device()
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* calls the platform_device_put()
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*/
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platform_device_del(udc_dev->pdev);
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put_vudc_device(udc_dev);
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}
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platform_driver_unregister(&vudc_driver);
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out:
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return retval;
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}
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module_init(init);
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static void __exit cleanup(void)
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{
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struct vudc_device *udc_dev = NULL, *udc_dev2 = NULL;
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list_for_each_entry_safe(udc_dev, udc_dev2, &vudc_devices, dev_entry) {
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list_del(&udc_dev->dev_entry);
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/*
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* Just do platform_device_del() here, put_vudc_device()
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* calls the platform_device_put()
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*/
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platform_device_del(udc_dev->pdev);
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put_vudc_device(udc_dev);
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}
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platform_driver_unregister(&vudc_driver);
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}
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module_exit(cleanup);
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MODULE_DESCRIPTION("USB over IP Device Controller");
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MODULE_AUTHOR("Krzysztof Opasiak, Karol Kosik, Igor Kotrasinski");
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MODULE_LICENSE("GPL");
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