3 * This file is provided under a dual BSD/GPLv2 license. When using or
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8 * Copyright(c) 2015 Intel Corporation.
10 * This program is free software; you can redistribute it and/or modify
11 * it under the terms of version 2 of the GNU General Public License as
12 * published by the Free Software Foundation.
14 * This program is distributed in the hope that it will be useful, but
15 * WITHOUT ANY WARRANTY; without even the implied warranty of
16 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
17 * General Public License for more details.
21 * Copyright(c) 2015 Intel Corporation.
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24 * modification, are permitted provided that the following conditions
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51 #include <linux/cdev.h>
52 #include <linux/module.h>
53 #include <linux/device.h>
59 static struct class *class;
60 static dev_t hfi1_dev;
62 int hfi1_cdev_init(int minor, const char *name,
63 const struct file_operations *fops,
64 struct cdev *cdev, struct device **devp)
66 const dev_t dev = MKDEV(MAJOR(hfi1_dev), minor);
67 struct device *device = NULL;
70 cdev_init(cdev, fops);
71 cdev->owner = THIS_MODULE;
72 kobject_set_name(&cdev->kobj, name);
74 ret = cdev_add(cdev, dev, 1);
76 pr_err("Could not add cdev for minor %d, %s (err %d)\n",
81 device = device_create(class, NULL, dev, NULL, "%s", name);
84 ret = PTR_ERR(device);
86 pr_err("Could not create device for minor %d, %s (err %d)\n",
94 void hfi1_cdev_cleanup(struct cdev *cdev, struct device **devp)
96 struct device *device = *devp;
99 device_unregister(device);
106 static const char *hfi1_class_name = "hfi1";
108 const char *class_name(void)
110 return hfi1_class_name;
113 int __init dev_init(void)
117 ret = alloc_chrdev_region(&hfi1_dev, 0, HFI1_NMINORS, DRIVER_NAME);
119 pr_err("Could not allocate chrdev region (err %d)\n", -ret);
123 class = class_create(THIS_MODULE, class_name());
125 ret = PTR_ERR(class);
126 pr_err("Could not create device class (err %d)\n", -ret);
127 unregister_chrdev_region(hfi1_dev, HFI1_NMINORS);
134 void dev_cleanup(void)
137 class_destroy(class);
141 unregister_chrdev_region(hfi1_dev, HFI1_NMINORS);