127 lines
3.0 KiB
C
127 lines
3.0 KiB
C
/*
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* Copyright (C) 2013 Samsung Electronics. All rights reserved.
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* version 2 as published by the Free Software Foundation.
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*
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* This program is distributed in the hope that it will be useful, but
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* WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
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* 02110-1301 USA
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*/
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/*
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* fingerprint sysfs class
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*/
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#include <linux/module.h>
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#include <linux/types.h>
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#include <linux/init.h>
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#include <linux/device.h>
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#include <linux/fs.h>
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#include <linux/err.h>
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struct class *fingerprint_class;
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EXPORT_SYMBOL_GPL(fingerprint_class);
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/*
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* Create sysfs interface
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*/
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static void set_fingerprint_attr(struct device *dev,
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struct device_attribute *attributes[])
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{
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int i;
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for (i = 0; attributes[i] != NULL; i++)
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if ((device_create_file(dev, attributes[i])) < 0)
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pr_err("%s: fail device_create_file"\
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"(dev, attributes[%d])\n", __func__, i);
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}
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int fingerprint_register(struct device *dev, void *drvdata,
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struct device_attribute *attributes[], char *name)
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{
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int ret = 0;
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if (!fingerprint_class) {
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fingerprint_class = class_create(THIS_MODULE, "fingerprint");
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if (IS_ERR(fingerprint_class))
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return PTR_ERR(fingerprint_class);
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}
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dev = device_create(fingerprint_class, NULL, 0, drvdata, "%s", name);
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if (IS_ERR(dev)) {
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ret = PTR_ERR(dev);
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pr_err("%s: device_create failed!"\
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"[%d]\n", __func__, ret);
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return ret;
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}
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set_fingerprint_attr(dev, attributes);
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return 0;
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}
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EXPORT_SYMBOL_GPL(fingerprint_register);
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void fingerprint_unregister(struct device *dev,
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struct device_attribute *attributes[])
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{
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int i;
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for (i = 0; attributes[i] != NULL; i++)
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device_remove_file(dev, attributes[i]);
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}
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EXPORT_SYMBOL_GPL(fingerprint_unregister);
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void destroy_fingerprint_class(void)
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{
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if (fingerprint_class) {
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class_destroy(fingerprint_class);
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fingerprint_class = NULL;
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}
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}
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EXPORT_SYMBOL_GPL(destroy_fingerprint_class);
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static int __init fingerprint_class_init(void)
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{
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pr_info("%s\n", __func__);
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fingerprint_class = class_create(THIS_MODULE, "fingerprint");
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if (IS_ERR(fingerprint_class)) {
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#if 0
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/* To do fix: build error */
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pr_err("%s, create fingerprint_class is failed.(err=%ld)\n",
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__func__, IS_ERR(fingerprint_class));
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#else
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pr_err("%s, create fingerprint_class is failed.\n",
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__func__);
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#endif
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return PTR_ERR(fingerprint_class);
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}
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fingerprint_class->dev_uevent = NULL;
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return 0;
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}
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static void __exit fingerprint_class_exit(void)
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{
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if (fingerprint_class) {
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class_destroy(fingerprint_class);
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fingerprint_class = NULL;
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}
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}
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subsys_initcall(fingerprint_class_init);
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module_exit(fingerprint_class_exit);
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MODULE_DESCRIPTION("fingerprint sysfs class");
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MODULE_LICENSE("GPL");
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