1 // SPDX-License-Identifier: GPL-2.0-or-later
3 * Stuff used by all variants of the driver
5 * Copyright (c) 2001 by Stefan Eilers,
6 * Hansjoerg Lipp <hjlipp@web.de>,
7 * Tilman Schmidt <tilman@imap.cc>.
9 * =====================================================================
10 * =====================================================================
15 static ssize_t show_cidmode(struct device *dev,
16 struct device_attribute *attr, char *buf)
18 struct cardstate *cs = dev_get_drvdata(dev);
20 return sprintf(buf, "%u\n", cs->cidmode);
23 static ssize_t set_cidmode(struct device *dev, struct device_attribute *attr,
24 const char *buf, size_t count)
26 struct cardstate *cs = dev_get_drvdata(dev);
30 value = simple_strtol(buf, &end, 0);
34 if (value < 0 || value > 1)
37 if (mutex_lock_interruptible(&cs->mutex))
41 if (!gigaset_add_event(cs, &cs->at_state, EV_PROC_CIDMODE,
44 mutex_unlock(&cs->mutex);
47 gigaset_schedule_event(cs);
49 wait_event(cs->waitqueue, !cs->waiting);
51 mutex_unlock(&cs->mutex);
56 static DEVICE_ATTR(cidmode, S_IRUGO | S_IWUSR, show_cidmode, set_cidmode);
58 /* free sysfs for device */
59 void gigaset_free_dev_sysfs(struct cardstate *cs)
64 gig_dbg(DEBUG_INIT, "removing sysfs entries");
65 device_remove_file(cs->tty_dev, &dev_attr_cidmode);
68 /* initialize sysfs for device */
69 void gigaset_init_dev_sysfs(struct cardstate *cs)
74 gig_dbg(DEBUG_INIT, "setting up sysfs");
75 if (device_create_file(cs->tty_dev, &dev_attr_cidmode))
76 pr_err("could not create sysfs attribute\n");